CN1033637A - Magnesium is inorganic combustion inhibitor and preparation method thereof - Google Patents
Magnesium is inorganic combustion inhibitor and preparation method thereof Download PDFInfo
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- CN1033637A CN1033637A CN 87101418 CN87101418A CN1033637A CN 1033637 A CN1033637 A CN 1033637A CN 87101418 CN87101418 CN 87101418 CN 87101418 A CN87101418 A CN 87101418A CN 1033637 A CN1033637 A CN 1033637A
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- magnesium
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Abstract
A kind of magnesium is inorganic combustion inhibitor and preparation method thereof.This fire retardant is made up of magnesium hydroxide, calcium sulfate, lime carbonate, magnesium chloride, calcium chloride, sodium-chlor.Its preparation method is that the mother liquor after the salt manufacturing is reacted under certain temperature, concentration and proportioning with milk of lime after treatment, is finished product through dehydration, drying, pulverizing.
Magnesium of the present invention is that inorganic combustion inhibitor is used for plastics, rubber, plays fire retardation.
Description
A kind of magnesium is inorganic combustion inhibitor and preparation method thereof.
The invention belongs to inorganic combustion inhibitor that high molecular polymer uses and preparation method thereof.
Before the present invention, be applied to the fire retardant of high molecular polymer, adopt the organic fire-retardant of antimonous oxide, aluminium hydroxide, lime carbonate and bromine, phosphorus system more, have plenty of independent use, have plenty of compound use.The report of suitability for industrialized production is not seen in domestic " Hangzhou chemical industry " publication second phase nineteen eighty-two publication " exploitation of inorganic combustion inhibitor magnesium hydroxide and prospect thereof ".On first-phase " pool salt science and technology " publications in 1984, publish " inanimate matter weighting agent magnesium hydroxide " and " magnesium hydroxide is as polyacrylic fire retardant " that Japanese palace Tian Maonan is shown, fire retardant described in these documents, its common feature is with pure magnesium hydroxide, level is equipped with the composition that aluminium hydroxide, magnesium basic carbonate and hydrocarbon hydrochlorate are formed, through after the surface treatment, dose in the plastics, rise and fill fire retardation.
The present invention has proposed new technical scheme in order to solve above-mentioned deficiency.The present invention makes the aqueous solution that contains magnesium ion, calcium ion, sodium ion, chlorion, sulfate ion, react with basic solution, make it to form the composition of magnesium hydroxide, magnesium chloride, calcium chloride, calcium sulfate, lime carbonate, sodium-chlor, once becoming compound magnesium through dehydration, drying, pulverizing is inorganic combustion inhibitor.The raw material that the present invention mainly adopts aborning is mother liquor and the milk of lime after the salt manufacturing of salt pan.
Main points of the present invention are that magnesium is that the set of dispense of inorganic combustion inhibitor compares and preparation method thereof.Its weight percent is formed:
Magnesium hydroxide 40-80
Calcium sulfate 25-4
Lime carbonate 15-5
Magnesium chloride 10-5
Calcium chloride 9-4
Sodium-chlor 1-2
Magnesium of the present invention is in the inorganic combustion inhibitor, contains silica weight less than one of percentage; Iron weight is less than 2/1000ths; Manganese weight less than ten thousand/.
Magnesium of the present invention is the preparation method of inorganic combustion inhibitor, is to be undertaken by following step: (1) wherein contains about 50 grams per liters of magnesium ion with the mother liquor after the salt manufacturing, and about 70 grams per liters of sulfate radical are heated to 50-60 ℃; (2) with saturated barium chloride solution, the requirement according to sulfate radical being handled 60-80% joins in (1) slowly, stirs, and makes it reaction and generates barium sulfate; If the content of the sulfate radical in the mother liquor after the salt manufacturing when the 14-28 grams per liter, does not then need to add saturated barium chloride solution sulfate radical is not handled; (3) the solid, liquid system in the step (2) is fully stirred after, quiescent settling 8-10 hour, carry out solid, liquid with suction filtration machine or pressure filter and separate, solid is a barium sulfate, is byproduct of the present invention; (4) solution in the step (3) contains magnesium ion quantity at the 30-40 grams per liter, with steam it is heated to 50-80 ℃, adds corresponding milk of lime according to the content of magnesium ion, makes it reaction and generates magnesium hydroxide, stirs quiescent settling 2-8 hour 3-5 minute; (5) the solid, liquid system in the step (4) is sent into pressure filter and carried out the solid, liquid separation, the aqueous solid material after the separation changes moisture eliminator over to, under 100-120 ℃, moisture evaporation is fallen; (6) dried solid matter is entered pulverizer, be crushed to 120-200 purpose fineness, be finished product.Milk of lime in the above-mentioned steps (4), can use sodium hydroxide, potassium hydroxide, ammonium hydroxide to replace respectively, with the salt-making mother liquor reaction of calcium ions 20-40 grams per liter, its add-on adds the amount of whole formation magnesium hydroxides according to the content of magnesium ion in the salt-making mother liquor.
Magnesium of the present invention is the magnesium hydroxide in the inorganic combustion inhibitor, and when chance was hot, a large amount of heat absorptions during to 340 ℃, began to decompose water outlet, play fire retardation; Calcium sulfate, lime carbonate play the assistance fire retardation, meet when hot, and it is topped in the surface of superpolymer to form fine and close thin layer, make it isolated with air; Magnesium chloride, calcium chloride, sodium-chlor itself very easily absorb heat, and its chlorion itself has good flame-retardant effect.Magnesium of the present invention is that inorganic combustion inhibitor is limited amount to iron and manganese, because of its content height, influential to the quality of high molecular polymer.
Magnesium of the present invention is inorganic combustion inhibitor and prior art contrast, following advantage is arranged: prior art is that the single or compound level of inorganic combustion inhibitor is cooperated, and doses in plastics or the resin, generally before dosing, carry out surface treatment, when amount of filling increases, its quality of item, performance will significantly descend, in order to reach flame retardant effect, the amount of filling of prior art is all bigger, complex procedures, labour intensity is big, and cost is also higher.Magnesium of the present invention is inorganic combustion inhibitor, itself be a kind of compound good inorganic combustion inhibitor, do not need to carry out surface treatment before the use, can directly dose in the raw material of plastics, resin and rubber item, amount of filling significantly reduces than existing inorganic combustion inhibitor amount of filling, can reach flame retardant effect; Reduced operation in the operation, good dispersity reduces labor intensity, and cost descends.
Embodiments of the invention:
1, to contain magnesium ion 52 grams per liters, 1 liter of the salt-making mother liquor of sulfate radical 71 grams per liters, be heated to 55 ℃, add 0.3 liter of saturated barium chloride solution, stir, sedimentation 8.5 hours, consolidate with the suction filtration machine, liquid separates, with the liquid heat to 70 that contains magnesium ion after separating ℃, add therein and do not contain 0.8 liter of particulate common lime breast, stirred 4 minutes, left standstill 3.5 hours, should be solid, liquid system enters pressure filter, solid matter after the separation evaporates moisture 110 ℃ of following dryings, then be crushed to 150 orders with pulverizer, this product 8% is dosed in the plastic-coated raw material of vinylon plastic-coated waterproof cloth by weight, the oxygen index that records its goods is that oxygen index is equal to or greater than 23.0% for the 23.5%(goods require index); In kind the antimonous oxide of weight 8% is dosed in such plastic-coated raw material, the oxygen index that records its goods is 24.0%; The present invention in contrast, cost has descended 50%, simultaneously good dispersity is easy to operate.
2, contain magnesium ion 50 grams per liters, calcium ion 30 grams per liters with 2 liters, the salt-making mother liquor of sulfate ion 25 grams per liters is heated to 65 ℃, add 2.2 liters of agricultural ammoniacal liquor, stirred 4 minutes, left standstill 2 hours, this solid, liquid system is entered pressure filter, isolated solid matter was dried 1 hour down at 115 ℃, be crushed to 120 orders, this product is dosed the colliery with in the difficult combustion rubber conveyer belt goods by 50 parts, the flaming combustion that records its goods is 5-8 second, and flameless combustion is 0 second; By adding 120 parts of antimonous oxides with sampling technology, the flaming combustion that records its goods is 6-8 second, and flameless combustion is 1-2 second; Magnesium of the present invention is that inorganic combustion inhibitor and antimonous oxide compare, and flame retardant effect is obvious, and cost has descended 2/3rds, and is easy to operate, and good dispersity has alleviated labour intensity.
Claims (6)
1, a kind of magnesium is inorganic combustion inhibitor, it is characterized in that weight percent consists of:
Magnesium hydroxide 40-80
Calcium sulfate 25-4
Lime carbonate 15-5
Magnesium chloride 10-5
Calcium chloride 9-4
Sodium-chlor 1-2.
2, be inorganic combustion inhibitor according to claim 1 said magnesium, it is characterized in that it contains silica weight less than one of percentage in forming; Iron weight is less than 2/1000ths; Manganese weight less than ten thousand/.
3, a kind of magnesium is the preparation method of inorganic combustion inhibitor, it is characterized in that carrying out according to following step:
(1) with the mother liquor after the salt manufacturing, wherein contain about 50 grams per liters of magnesium ion, about 70 grams per liters of sulfate radical are heated to 50-60 ℃;
(2) with saturated barium chloride solution, the requirement according to sulfate radical being handled 60-80% joins in (1) slowly, stirs, and makes it reaction and generates barium sulfate;
(3) the solid, liquid system in (2) is fully stirred after, quiescent settling 8-10 hour, carry out solid, liquid with suction filtration machine or pressure filter and separate;
(4) solution in the step (3) contains magnesium ion at the 30-40 grams per liter, with steam it is heated to 50-80 ℃, according to the content of magnesium ion, adds corresponding milk of lime, makes it reaction and generates magnesium hydroxide, stirs quiescent settling 2-8 hour 3-5 minute;
(5) the solid, liquid system in the step (4) is sent into pressure filter and carried out the solid, liquid separation, the solid matter after will separating again changes moisture eliminator over to, under 100-120 ℃, moisture evaporation is fallen;
(6) dried solid matter is entered pulverizer, be crushed to 120-200 purpose fineness.
4, be the preparation method of inorganic combustion inhibitor according to claim 3 said magnesium, it is characterized in that reacting and also can carry out at normal temperatures.
5, be the preparation method of inorganic combustion inhibitor according to claim 3 or 4 said magnesium, it is characterized in that milk of lime can use sodium hydroxide, potassium hydroxide, ammonium hydroxide to replace respectively, with the rear stock solution of salt producing reaction of calcium ions 20-40 grams per liter.
6, be the preparation method of inorganic combustion inhibitor according to claim 3 or 4 said magnesium, it is characterized in that the mother liquor after the salt manufacturing can adopt the solution that contains magnesium ion, sodium ion, chlorion, sulfate ion to replace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101418 CN1010686B (en) | 1987-12-16 | 1987-12-16 | Inorganic fire retardant of magnesium series and preparing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101418 CN1010686B (en) | 1987-12-16 | 1987-12-16 | Inorganic fire retardant of magnesium series and preparing technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1033637A true CN1033637A (en) | 1989-07-05 |
| CN1010686B CN1010686B (en) | 1990-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87101418 Expired CN1010686B (en) | 1987-12-16 | 1987-12-16 | Inorganic fire retardant of magnesium series and preparing technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010686B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294716A (en) * | 2011-08-23 | 2011-12-28 | 中南林业科技大学 | Wood fire retardant with low cost and high efficiency |
| CN101747909B (en) * | 2010-01-20 | 2012-10-24 | 西安电子科技大学 | Method for preparing flame-retardant calcium carbonate |
| CN103351882A (en) * | 2013-08-02 | 2013-10-16 | 吴庆林 | Liquid efficient fire retardation agent and preparation method thereof |
| CN103819936A (en) * | 2014-02-28 | 2014-05-28 | 连云港倍特超微粉有限公司 | Preparation method for compound-type inorganic flame retardation powder material with dual core-shell structure |
| CN104313326A (en) * | 2014-10-17 | 2015-01-28 | 金川集团股份有限公司 | Method for reducing amount of barium chloride in eliminating sulfate radical in nickel chloride solution with high content of sulfate radical |
| CN107629391A (en) * | 2017-10-02 | 2018-01-26 | 镇江市星耀智能装备有限公司 | A kind of fire retardant for flame-proof sheet material |
| CN112391176A (en) * | 2019-08-19 | 2021-02-23 | 唐苑雯 | Magnesium chloride and calcium chloride aqueous solution flame retardant |
-
1987
- 1987-12-16 CN CN 87101418 patent/CN1010686B/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747909B (en) * | 2010-01-20 | 2012-10-24 | 西安电子科技大学 | Method for preparing flame-retardant calcium carbonate |
| CN102294716A (en) * | 2011-08-23 | 2011-12-28 | 中南林业科技大学 | Wood fire retardant with low cost and high efficiency |
| CN102294716B (en) * | 2011-08-23 | 2013-09-11 | 中南林业科技大学 | Wood fire retardant with low cost and high efficiency |
| CN103351882A (en) * | 2013-08-02 | 2013-10-16 | 吴庆林 | Liquid efficient fire retardation agent and preparation method thereof |
| CN103819936A (en) * | 2014-02-28 | 2014-05-28 | 连云港倍特超微粉有限公司 | Preparation method for compound-type inorganic flame retardation powder material with dual core-shell structure |
| CN103819936B (en) * | 2014-02-28 | 2015-05-27 | 连云港倍特超微粉有限公司 | Preparation method for compound-type inorganic flame retardation powder material with dual core-shell structure |
| CN104313326A (en) * | 2014-10-17 | 2015-01-28 | 金川集团股份有限公司 | Method for reducing amount of barium chloride in eliminating sulfate radical in nickel chloride solution with high content of sulfate radical |
| CN107629391A (en) * | 2017-10-02 | 2018-01-26 | 镇江市星耀智能装备有限公司 | A kind of fire retardant for flame-proof sheet material |
| CN112391176A (en) * | 2019-08-19 | 2021-02-23 | 唐苑雯 | Magnesium chloride and calcium chloride aqueous solution flame retardant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1010686B (en) | 1990-12-05 |
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