CN113699375A - Additive solution for improving leaching rate of rare earth elements leached by microorganisms, preparation method and application - Google Patents
Additive solution for improving leaching rate of rare earth elements leached by microorganisms, preparation method and application Download PDFInfo
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- 239000000654 additive Substances 0.000 title claims abstract description 48
- 230000000996 additive effect Effects 0.000 title claims abstract description 48
- 244000005700 microbiome Species 0.000 title claims abstract description 33
- 238000002386 leaching Methods 0.000 title claims abstract description 28
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 51
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004202 carbamide Substances 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- 241000894006 Bacteria Species 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000011538 cleaning material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000012258 culturing Methods 0.000 claims description 7
- 108010010803 Gelatin Proteins 0.000 claims description 5
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 5
- 229920000159 gelatin Polymers 0.000 claims description 5
- 239000008273 gelatin Substances 0.000 claims description 5
- 235000019322 gelatine Nutrition 0.000 claims description 5
- 235000011852 gelatine desserts Nutrition 0.000 claims description 5
- 239000008103 glucose Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 241000186361 Actinobacteria <class> Species 0.000 claims description 3
- 241000186000 Bifidobacterium Species 0.000 claims description 3
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 3
- 229910052691 Erbium Inorganic materials 0.000 claims description 3
- 229910052693 Europium Inorganic materials 0.000 claims description 3
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 3
- 229910052689 Holmium Inorganic materials 0.000 claims description 3
- 229910052765 Lutetium Inorganic materials 0.000 claims description 3
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 3
- 229910052773 Promethium Inorganic materials 0.000 claims description 3
- 229910052772 Samarium Inorganic materials 0.000 claims description 3
- 229910052771 Terbium Inorganic materials 0.000 claims description 3
- 229910052775 Thulium Inorganic materials 0.000 claims description 3
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 3
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 3
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims description 3
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 3
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 3
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 3
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 3
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims description 3
- VQMWBBYLQSCNPO-UHFFFAOYSA-N promethium atom Chemical compound [Pm] VQMWBBYLQSCNPO-UHFFFAOYSA-N 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims description 3
- 229910052706 scandium Inorganic materials 0.000 claims description 3
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 3
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims description 3
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 4
- 239000011707 mineral Substances 0.000 abstract description 4
- 230000000813 microbial effect Effects 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 238000012136 culture method Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000003245 coal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 238000005119 centrifugation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- -1 ferrous metals Chemical class 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009629 microbiological culture Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004729 solvothermal method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Biotechnology (AREA)
- Geochemistry & Mineralogy (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明提供了一种提高微生物浸出稀土元素浸出率的添加液及制备方法、培养方法和应用，属于矿产开采技术领域，所述添加液的原料包括树脂、高锰酸钾、尿素和乙二醇，所述树脂、高锰酸钾、尿素和乙二醇的质量比为2:2:3:5。本发明提供的添加液培养的微生物，提高了微生物浸出稀土元素的浸出率，浸出率高达90％以上。The invention provides an additive solution for improving the leaching rate of microbial leaching rare earth elements, a preparation method, a culture method and application, belonging to the technical field of mineral mining. The raw materials of the additive solution include resin, potassium permanganate, urea and ethylene glycol , the mass ratio of the resin, potassium permanganate, urea and ethylene glycol is 2:2:3:5. The microorganisms cultured in the additive solution provided by the invention improve the leaching rate of rare earth elements leached by the microorganisms, and the leaching rate is as high as 90% or more.
Description
Technical Field
The invention relates to the technical field of mineral exploitation, in particular to an additive solution for improving the leaching rate of rare earth elements leached by microorganisms, a preparation method and application.
Background
Coal is the most abundant fuel resource in the earth and has long occupied an important position in the world in the field of primary energy production and consumption. The coal consumption accounts for 76% in power generation energy in China, 75% in industrial fuel and 80% and 60% in civil commercial energy and chemical raw materials respectively. The strong dependence of the world economic development on the coal mining technology promotes the development of coal development towards large-scale mechanized and high-strength centralized production.
The associated mine of coal mine and the associated product produced in the processing process have a large proportion of fly ash, can provide mineral resources for industrially extracting certain metal elements, and can be divided into ferrous metals, nonferrous metals, light metals, noble metals, radioactive elements, rare elements, dispersing elements and the like according to the industrial application and the property of the metal elements. The commonly associated metal minerals in coal systems are more common with rare, dispersed and radioactive elements (occurring as trace elements), such as germanium, gallium, uranium, thorium, and the like.
At present, in the utilization process of the fly ash, microorganisms are adopted for leaching in many countries, but the culture of the microorganisms has no particularity at present, and the leaching efficiency of rare earth elements is not high.
Disclosure of Invention
In view of the above, the present invention aims to provide an additive solution for improving the leaching rate of rare earth elements leached by microorganisms, and a preparation method and an application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an additive solution for improving the leaching rate of rare earth elements leached by microorganisms, which comprises the following raw materials: the resin, the potassium permanganate, the urea and the ethylene glycol are mixed according to the mass ratio of 2 (2-3) to 3: 5.
Preferably, the microorganism comprises one or more of acetic acid bacteria, bifidobacteria and actinomycetes.
Preferably, the rare earth elements include one or more of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, yttrium, and scandium.
The invention also provides a preparation method of the additive solution, which comprises the following steps:
1) reacting the urea with ethylene glycol to obtain a reaction material; cleaning the reaction material to obtain a cleaning material;
2) carrying out thermal reaction on the cleaning material obtained in the step 1) and potassium permanganate to obtain a thermal reaction material;
3) carrying out heat treatment on the hot reaction material obtained in the step 2) and resin to obtain an additive solution.
Preferably, the temperature of the reaction in the step 1) is 120 ℃, and the reaction time is 12 h.
Preferably, the temperature of the thermal reaction in the step 2) is 60 ℃, and the time of the thermal reaction is 1 h.
Preferably, the temperature of the heat treatment in the step 3) is 80 ℃, and the time of the heat treatment is 2 h.
The invention also provides application of the additive solution or the additive solution prepared by the preparation method in improving the leaching rate of the rare earth elements leached by the microorganisms.
The invention also provides a method for culturing microorganisms by using the additive solution, which is characterized by comprising the following steps: mixing the additive solution with mother bacteria and a culture solution, culturing, and collecting microorganisms; the mass ratio of the additive solution to the mother bacteria to the culture solution is 2:1: 2.
Preferably, the culture solution comprises the following components in parts by weight: 15-20 parts of glucose, 10-15 parts of urea, 5-8 parts of gelatin and 60 parts of water.
The invention provides an additive solution for improving the leaching rate of rare earth elements leached by microorganisms, which comprises the following raw materials: the resin, the potassium permanganate, the urea and the ethylene glycol are mixed according to a mass ratio of 2:2:3: 5. The additive solution provided by the invention adopts urea to prepare the carbon shell, and resin is added into the carbon shell to form a sticky carbon shell inside and outside, so that the adsorption area of the shell is increased; meanwhile, the carbon shell is added to the microbial mother bacteria for microbial culture, so that more microbes are adsorbed on the surface of the carbon shell, and the leaching rate of leaching rare earth elements by the microbes is improved and reaches over 90 percent.
Detailed Description
The invention provides an additive solution for improving the leaching rate of rare earth elements leached by microorganisms, wherein the raw materials of the additive solution comprise resin, potassium permanganate, urea and ethylene glycol, and the mass ratio of the resin to the potassium permanganate to the urea to the ethylene glycol is 2:2:3: 5.
Unless otherwise specified, the present invention is not limited to the source of the raw material of the additive solution, and any commercially available product known to those skilled in the art may be used.
The additive solution of the present invention includes 2 parts by mass of a resin. In the present invention, the resin preferably includes polyethylene and/or polypropylene. The resin of the present invention functions to provide tackiness.
The additive solution comprises 2-3 parts by mass of potassium permanganate, and preferably 2 parts. In the invention, the potassium permanganate has the function of providing an oxidation environment in the whole reaction system and extracting carbon element carbon shells in urea.
The additive solution comprises 3 parts by mass of urea.
The additive solution of the present invention includes 5 parts by mass of ethylene glycol. In the present invention, the volume concentration of the ethylene glycol is preferably 60% to 80%, more preferably 65% to 75%. The ethylene glycol of the present invention functions as a dispersant.
In the present invention, the microorganism preferably includes one or more of acetic acid bacteria, bifidobacteria and actinomycetes. In the present invention, the rare earth element preferably includes one or more of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, yttrium, and scandium.
The invention also provides a preparation method of the additive solution, which comprises the following steps:
1) reacting the urea with ethylene glycol to obtain a reaction material, and cleaning the reaction material to obtain a cleaning material;
2) carrying out thermal reaction on the cleaning material obtained in the step 1) and potassium permanganate to obtain a thermal reaction material;
3) carrying out heat treatment on the hot reaction material obtained in the step 2) and resin to obtain an additive solution.
The urea and the ethylene glycol react to obtain a reaction material, and the reaction material is cleaned to obtain a cleaning material. In the present invention, the reaction temperature is preferably 120 ℃ and the reaction time is preferably 12 hours.
The present invention preferably adds the urea to ethylene glycol.
The apparatus for carrying out the reaction is not particularly limited in the present invention, and the reaction is preferably carried out in an oven. The source of the oven is not limited in the present invention, and commercially available products known to those skilled in the art may be used.
In the present invention, the reaction material is preferably washed with pure water.
After the cleaning material is obtained, the cleaning material and potassium permanganate are subjected to thermal reaction to obtain a thermal reaction material. In the present invention, the temperature of the thermal reaction is preferably 60 ℃, and the time of the thermal reaction is preferably 1 h; the thermal reaction preferably comprises a hydrothermal reaction. In the present invention, the thermal reaction is preferably carried out under stirring.
After obtaining the thermal reaction material, the invention carries out heat treatment on the thermal reaction material and the resin to obtain the additive solution. In the present invention, the temperature of the heat treatment is preferably 80 ℃, and the time of the heat treatment is preferably 2 hours.
The invention also provides application of the additive solution in the technical scheme in improving the leaching rate of rare earth elements leached by microorganisms. The additive solution provided by the invention can improve the leaching rate of the rare earth elements leached by microorganisms, and the leaching rate is up to more than 90%.
The invention also provides a method for culturing microorganisms by using the additive solution, which comprises the following steps: mixing the additive solution with mother bacteria and a culture solution, culturing, and collecting microorganisms; the mass ratio of the additive solution to the mother bacteria to the culture solution is 2:1: 2.
In the invention, the viable count of the parent bacteria is preferably 40-50 CFU/mL.
In the present invention, the culture solution preferably comprises the following components in parts by weight: 15-20 parts of glucose, 10-15 parts of urea, 5-8 parts of gelatin and 60 parts of water; more preferably 17-18 parts of glucose, 12-13 parts of urea, 6-7 parts of gelatin and 60 parts of water.
The conditions for the culture in the present invention are not particularly limited, and those suitable for the mother bacteria known to those skilled in the art may be used.
In the invention, the method for collecting the microorganisms preferably comprises centrifugation, and the rotation speed of the centrifugation is preferably 500-1000 r/min, more preferably 700-800 r/min, and even more preferably 750 r/min.
In order to further illustrate the present invention, the following detailed description of the invention is given in conjunction with examples, which should not be construed to limit the scope of the invention.
Example 1
An additive solution for improving the leaching rate of rare earth elements leached by microorganisms comprises the following components: 200g (2 parts by mass) of a resin, 200g (2 parts by mass) of potassium permanganate, 300g (3 parts by mass) of urea, and 500g (5 parts by mass) of ethylene glycol (70% by volume).
The preparation of the additive solution is as follows:
adding urea into ethylene glycol, carrying out solvothermal reaction, placing the mixture into an oven, keeping the temperature at 120 ℃, reacting for 12 hours, cleaning the mixture by using pure water after the reaction is finished (adding potassium permanganate, carrying out hydrothermal stirring at the stirring temperature of 60 ℃ for 1 hour, adding resin particles after the stirring is finished, heating the mixture to 80 ℃ for 2 hours, and cooling the mixture to room temperature to prepare the additive solution.
Example 2
A method for culturing and leaching rare earth element microorganisms comprises the following steps:
preparation of culture solution: 170g of glucose, 120g of urea, 60g of gelatin and 600g of water were mixed to obtain a culture solution.
200mL of the culture solution was added to a culture dish, 100mL of acetic acid bacteria (the viable count of the acetic acid bacteria is 45CUF/mL) was inoculated into the culture solution, 200mL of the additive solution prepared in example 1 was added to the culture dish, culture was performed, the supernatant was taken out, and the lower layer liquid was collected by centrifugation (centrifugation speed 750r/min) to obtain the target microorganism.
Comparative example 1
A method similar to example 2, except that the additive solution prepared in example 1 was replaced with an equal volume of clear water.
Application example 1
The leaching rates of the rare earth elements of example 2 and comparative example 1 were measured.
The leaching rate of the metals in the fly ash coal leached by the microorganism cultured in the comparative example 1 is only 55 percent, and when the microorganism cultured by the method provided by the invention is used for leaching, the leaching rate can reach 90 percent.
In conclusion, the leaching rate of the rare earth elements leached by the microorganisms is improved by the microorganisms cultured by the additive solution.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The additive solution for improving the leaching rate of the rare earth elements leached by microorganisms is characterized by comprising the following raw materials: the resin, the potassium permanganate, the urea and the ethylene glycol are mixed according to the mass ratio of 2 (2-3) to 3: 5.
2. The additive solution according to claim 1, wherein the microorganism comprises one or more of acetic acid bacteria, bifidobacteria and actinomycetes.
3. The additive solution of claim 1 wherein said rare earth elements comprise one or more of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, yttrium, and scandium.
4. The method for producing the additive solution according to any one of claims 1 to 3, comprising the steps of:
1) reacting the urea with ethylene glycol to obtain a reaction material; cleaning the reaction material to obtain a cleaning material;
2) carrying out thermal reaction on the cleaning material obtained in the step 1) and potassium permanganate to obtain a thermal reaction material;
3) carrying out heat treatment on the hot reaction material obtained in the step 2) and resin to obtain an additive solution.
5. The method according to claim 4, wherein the reaction temperature in step 1) is 120 ℃ and the reaction time is 12 hours.
6. The method according to claim 4, wherein the temperature of the thermal reaction in the step 2) is 60 ℃ and the time of the thermal reaction is 1 hour.
7. The method according to claim 4, wherein the temperature of the heat treatment in step 3) is 80 ℃ and the time of the heat treatment is 2 hours.
8. Use of the additive solution of any one of claims 1 to 3 or the additive solution prepared by the preparation method of any one of claims 4 to 7 for improving the leaching rate of rare earth elements leached by microorganisms.
9. A method for culturing microorganisms using the additive solution according to any one of claims 1 to 3, comprising the steps of: mixing the additive solution with mother bacteria and a culture solution, culturing, and collecting microorganisms; the mass ratio of the additive solution to the mother bacteria to the culture solution is 2:1: 2.
10. The method according to claim 9, wherein the culture solution comprises the following components in parts by weight: 15-20 parts of glucose, 10-15 parts of urea, 5-8 parts of gelatin and 60 parts of water.
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| CN202111018900.5A CN113699375A (en) | 2021-09-01 | 2021-09-01 | Additive solution for improving leaching rate of rare earth elements leached by microorganisms, preparation method and application |
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