CN111548253A - Process for producing absolute ethyl alcohol by membrane separation - Google Patents
Process for producing absolute ethyl alcohol by membrane separation Download PDFInfo
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- CN111548253A CN111548253A CN202010414596.5A CN202010414596A CN111548253A CN 111548253 A CN111548253 A CN 111548253A CN 202010414596 A CN202010414596 A CN 202010414596A CN 111548253 A CN111548253 A CN 111548253A
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- pipeline
- cylindrical container
- ethyl alcohol
- molecular sieve
- absolute ethyl
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/78—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by condensation or crystallisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/028—Molecular sieves
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a process for producing absolute ethyl alcohol by membrane separation, which comprises the following steps: 1) preparing 5-10 pipelines and a cylindrical container for bearing the pipelines, and installing a molecular sieve membrane on the inner wall of each pipeline; 2) fixing the pipeline around the inside of the cylindrical container, installing a valve at the bottom of the pipeline, and installing a water outlet pipeline at the bottom of the cylindrical container or on the side surface of the bottom of the cylindrical container; 3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container. According to the process for producing the absolute ethyl alcohol through the membrane separation, the molecular sieve membrane is utilized, then the industrial ethyl alcohol is sent into the middle of the molecular sieve membrane through the pressure pump, and due to the fact that the pressure difference between the inside and the outside of the pipeline is small in diameter of water molecules, the water molecules can flow out of the pipeline through the molecular sieve membrane, so that the industrial ethyl alcohol inside the pipeline is changed into the absolute ethyl alcohol, and the method is economical and environment-friendly.
Description
Technical Field
The invention relates to the technical field of absolute ethyl alcohol manufacturing processes, in particular to a process for producing absolute ethyl alcohol by membrane separation.
Background
The industrial ethanol is generally colorless transparent liquid, is flammable and volatile, has slight aroma of wine, and the basic purification method of the industrial ethanol can reach the concentration of 95 percent and can not meet the requirement of producing DEC.
Therefore, a process for separating industrial ethanol into absolute ethanol by using a molecular sieve membrane is needed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a process for producing absolute ethyl alcohol by membrane separation, which aims to solve the problems in the background art.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a process for producing absolute ethyl alcohol by membrane separation comprises the following steps:
1) preparing 5-10 pipelines and a cylindrical container for bearing the pipelines, and installing a molecular sieve membrane on the inner wall of each pipeline;
2) fixing the pipeline in the step 1) around the inner part of the cylindrical container, installing a valve at the bottom of the pipeline, and installing a water outlet pipeline at the bottom of the cylindrical container or on the side surface of the bottom of the cylindrical container;
3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container;
4) a main pipeline is arranged above the pipeline in the cylindrical container, and the pipeline in the cylindrical container is connected with the main pipeline;
5) industrial ethanol is sent into the interior of a main pipeline through a pressure pump, and then is distributed into the pipeline in each cylindrical container due to the pressure effect and is positioned inside a molecular sieve membrane;
6) when the pressurizing pump works, a pressure difference is formed between the interior of the molecular sieve membrane and the exterior of the pipeline, and the rotating device is started to rotate the cylindrical container, so that a centrifugal force is generated;
7) because the molecular size of water is smaller than that of ethanol, water molecules automatically enter the outside of the pipeline through the molecular sieve membrane under the action of pressure, flow into the wall of the cylindrical container, are discharged through the water outlet pipeline, are filled in the container and are collected, and absolute ethanol is remained in the pipeline;
8) opening a valve at the bottom of the pipeline, discharging the absolute ethyl alcohol, and then carrying out the steps from 5) to 7) to obtain the final absolute ethyl alcohol product.
Preferably, the diameter of the pipeline in the step 1) is 2-5cm, small holes are distributed around the pipeline, and the diameter of each small hole is 3-5 mm;
preferably, the pipeline in the cylindrical container in the step 2) is an industrial ethanol feeding pipeline, and the cylindrical container is a water container;
preferably, the pipeline and the cylindrical container are both made of stainless steel;
preferably, the rotating speed of the rotating device in the step 6) is 60-80 r/min.
(III) advantageous effects
Compared with the prior art, the invention provides a process for producing absolute ethyl alcohol by membrane separation, which has the following beneficial effects:
1. according to the process for producing the absolute ethyl alcohol by membrane separation, the molecular sieve membrane is utilized, and then the industrial ethyl alcohol is conveyed into the middle part of the molecular sieve membrane through the pressurizing pump, so that water molecules can flow out of the pipeline through the molecular sieve membrane due to the pressure difference between the inside and the outside of the pipeline and the small diameter of the water molecules, and the industrial ethyl alcohol in the pipeline is changed into the absolute ethyl alcohol;
2. according to the process for producing the absolute ethyl alcohol by the membrane separation, the centrifugal force generated by the pressure pump and the rotating device improves the efficiency of water molecule separation, the separation of water molecules is more facilitated, and the industrial ethyl alcohol can be thoroughly separated from the water molecules through three repeated processes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a process for producing absolute ethyl alcohol by membrane separation comprises the following steps:
1) preparing 5 pipelines and a cylindrical container for bearing the pipelines, mounting a molecular sieve membrane on the inner wall of each pipeline, wherein the diameter of each pipeline is 2cm, small holes are distributed around each pipeline, the diameter of each small hole is 3mm, and the pipelines and the cylindrical container are made of stainless steel materials;
2) fixing the pipeline in the step 1) around the inner part of the cylindrical container, wherein the bottom of the pipeline is provided with a valve, the bottom or the side surface of the bottom of the cylindrical container is provided with a water outlet pipeline, the pipeline in the cylindrical container is an industrial ethanol feeding pipeline, and the cylindrical container is a water container;
3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container;
4) a main pipeline is arranged above the pipeline in the cylindrical container, and the pipeline in the cylindrical container is connected with the main pipeline;
5) industrial ethanol is sent into the interior of a main pipeline through a pressure pump, and then is distributed into the pipeline in each cylindrical container due to the pressure effect and is positioned inside a molecular sieve membrane;
6) when the pressurizing pump works, a pressure difference is formed between the interior of the molecular sieve membrane and the exterior of the pipeline, the rotating device is started to rotate the cylindrical container, so that centrifugal force is generated, and the rotating speed of the rotating device is 60 revolutions per minute;
7) because the molecular size of water is smaller than that of ethanol, water molecules automatically enter the outside of the pipeline through the molecular sieve membrane under the action of pressure, flow into the wall of the cylindrical container, are discharged through the water outlet pipeline, are filled in the container and are collected, and absolute ethanol is remained in the pipeline;
8) opening a valve at the bottom of the pipeline, discharging the absolute ethyl alcohol, and then carrying out the steps from 5) to 7) to obtain the final absolute ethyl alcohol product.
Example two:
a process for producing absolute ethyl alcohol by membrane separation comprises the following steps:
1) preparing 6 pipelines and a cylindrical container for bearing the pipelines, mounting a molecular sieve membrane on the inner wall of each pipeline, wherein the diameter of each pipeline is 3cm, small holes are distributed around each pipeline, the diameter of each small hole is 4mm, and the pipelines and the cylindrical container are made of stainless steel materials;
2) fixing the pipeline in the step 1) around the inner part of the cylindrical container, wherein the bottom of the pipeline is provided with a valve, the bottom or the side surface of the bottom of the cylindrical container is provided with a water outlet pipeline, the pipeline in the cylindrical container is an industrial ethanol feeding pipeline, and the cylindrical container is a water container;
3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container;
4) a main pipeline is arranged above the pipeline in the cylindrical container, and the pipeline in the cylindrical container is connected with the main pipeline;
5) industrial ethanol is sent into the interior of a main pipeline through a pressure pump, and then is distributed into the pipeline in each cylindrical container due to the pressure effect and is positioned inside a molecular sieve membrane;
6) when the pressurizing pump works, a pressure difference is formed between the interior of the molecular sieve membrane and the exterior of the pipeline, the rotating device is started to rotate the cylindrical container, so that centrifugal force is generated, and the rotating speed of the rotating device is 65 revolutions per minute;
7) because the molecular size of water is smaller than that of ethanol, water molecules automatically enter the outside of the pipeline through the molecular sieve membrane under the action of pressure, flow into the wall of the cylindrical container, are discharged through the water outlet pipeline, are filled in the container and are collected, and absolute ethanol is remained in the pipeline;
8) opening a valve at the bottom of the pipeline, discharging the absolute ethyl alcohol, and then carrying out the steps from 5) to 7) to obtain the final absolute ethyl alcohol product.
Example three:
a process for producing absolute ethyl alcohol by membrane separation comprises the following steps:
1) preparing 7 pipelines and a cylindrical container for bearing the pipelines, mounting a molecular sieve membrane on the inner wall of each pipeline, wherein the diameter of each pipeline is 4cm, small holes are distributed around each pipeline, the diameter of each small hole is 5mm, and the pipelines and the cylindrical container are made of stainless steel materials;
2) fixing the pipeline in the step 1) around the inner part of the cylindrical container, wherein the bottom of the pipeline is provided with a valve, the bottom or the side surface of the bottom of the cylindrical container is provided with a water outlet pipeline, the pipeline in the cylindrical container is an industrial ethanol feeding pipeline, and the cylindrical container is a water container;
3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container;
4) a main pipeline is arranged above the pipeline in the cylindrical container, and the pipeline in the cylindrical container is connected with the main pipeline;
5) industrial ethanol is sent into the interior of a main pipeline through a pressure pump, and then is distributed into the pipeline in each cylindrical container due to the pressure effect and is positioned inside a molecular sieve membrane;
6) when the pressurizing pump works, a pressure difference is formed between the interior of the molecular sieve membrane and the exterior of the pipeline, the rotating device is started to rotate the cylindrical container, so that centrifugal force is generated, and the rotating speed of the rotating device is 70 revolutions per minute;
7) because the molecular size of water is smaller than that of ethanol, water molecules automatically enter the outside of the pipeline through the molecular sieve membrane under the action of pressure, flow into the wall of the cylindrical container, are discharged through the water outlet pipeline, are filled in the container and are collected, and absolute ethanol is remained in the pipeline;
8) opening a valve at the bottom of the pipeline, discharging the absolute ethyl alcohol, and then carrying out the steps from 5) to 7) to obtain the final absolute ethyl alcohol product.
Example four:
a process for producing absolute ethyl alcohol by membrane separation comprises the following steps:
1) preparing 10 pipelines and a cylindrical container for bearing the pipelines, mounting a molecular sieve membrane on the inner wall of each pipeline, wherein the diameter of each pipeline is 5cm, small holes are distributed around each pipeline, the diameter of each small hole is 5mm, and the pipelines and the cylindrical container are made of stainless steel materials;
2) fixing the pipeline in the step 1) around the inner part of the cylindrical container, wherein the bottom of the pipeline is provided with a valve, the bottom or the side surface of the bottom of the cylindrical container is provided with a water outlet pipeline, the pipeline in the cylindrical container is an industrial ethanol feeding pipeline, and the cylindrical container is a water container;
3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container;
4) a main pipeline is arranged above the pipeline in the cylindrical container, and the pipeline in the cylindrical container is connected with the main pipeline;
5) industrial ethanol is sent into the interior of a main pipeline through a pressure pump, and then is distributed into the pipeline in each cylindrical container due to the pressure effect and is positioned inside a molecular sieve membrane;
6) when the pressurizing pump works, a pressure difference is formed between the interior of the molecular sieve membrane and the exterior of the pipeline, the rotating device is started to rotate the cylindrical container, so that centrifugal force is generated, and the rotating speed of the rotating device is 80 revolutions per minute;
7) because the molecular size of water is smaller than that of ethanol, water molecules automatically enter the outside of the pipeline through the molecular sieve membrane under the action of pressure, flow into the wall of the cylindrical container, are discharged through the water outlet pipeline, are filled in the container and are collected, and absolute ethanol is remained in the pipeline;
8) opening a valve at the bottom of the pipeline, discharging the absolute ethyl alcohol, and then carrying out the steps from 5) to 7) to obtain the final absolute ethyl alcohol product.
The invention has the beneficial effects that: this process of membrane separation production absolute ethyl alcohol, through utilizing the molecular sieve membrane, then send into the middle part of molecular sieve membrane with industry ethanol through the force (forcing) pump, because the inside and outside pressure differential of pipeline, and the smaller reason of hydrone diameter, thereby the hydrone can pass through the molecular sieve membrane outflow pipeline outside, thereby make the inside industry ethanol of pipeline become absolute ethyl alcohol, this method economy and environmental protection, the centrifugal force that produces through force (forcing) pump and rotary device makes the efficiency of hydrone separation improve, and more do benefit to the separation of hydrone, and through the repeating process of cubic, can thoroughly separate out industry ethanol with the hydrone.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A process for producing absolute ethyl alcohol by membrane separation is characterized by comprising the following steps:
1) preparing 5-10 pipelines and a cylindrical container for bearing the pipelines, and installing a molecular sieve membrane on the inner wall of each pipeline;
2) fixing the pipeline in the step 1) around the inner part of the cylindrical container, installing a valve at the bottom of the pipeline, and installing a water outlet pipeline at the bottom of the cylindrical container or on the side surface of the bottom of the cylindrical container;
3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container;
4) a main pipeline is arranged above the pipeline in the cylindrical container, and the pipeline in the cylindrical container is connected with the main pipeline;
5) industrial ethanol is sent into the interior of a main pipeline through a pressure pump, and then is distributed into the pipeline in each cylindrical container due to the pressure effect and is positioned inside a molecular sieve membrane;
6) when the pressurizing pump works, a pressure difference is formed between the interior of the molecular sieve membrane and the exterior of the pipeline, and the rotating device is started to rotate the cylindrical container, so that a centrifugal force is generated;
7) because the molecular size of water is smaller than that of ethanol, water molecules automatically enter the outside of the pipeline through the molecular sieve membrane under the action of pressure, flow into the wall of the cylindrical container, are discharged through the water outlet pipeline, are filled in the container and are collected, and absolute ethanol is remained in the pipeline;
8) opening a valve at the bottom of the pipeline, discharging the absolute ethyl alcohol, and then carrying out the steps from 5) to 7) to obtain the final absolute ethyl alcohol product.
2. The process for producing absolute ethanol by membrane separation according to claim 1, wherein: in the step 1), the diameter of the pipeline is 2-5cm, small holes are distributed around the pipeline, and the diameter of each small hole is 3-5 mm.
3. The process for producing absolute ethanol by membrane separation according to claim 1, wherein: the pipeline in the cylindrical container in the step 2) is an industrial ethanol feeding pipeline, and the cylindrical container is a water container.
4. The process for producing absolute ethanol by membrane separation according to claim 1, wherein: the pipeline and the cylindrical container are both made of stainless steel.
5. The process for producing absolute ethanol by membrane separation according to claim 1, wherein: the rotating speed of the rotating device in the step 6) is 60-80 r/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010414596.5A CN111548253A (en) | 2020-05-15 | 2020-05-15 | Process for producing absolute ethyl alcohol by membrane separation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010414596.5A CN111548253A (en) | 2020-05-15 | 2020-05-15 | Process for producing absolute ethyl alcohol by membrane separation |
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