CN110624416A - Production method of polyvinyl propionaldehyde microfiltration filter material - Google Patents
Production method of polyvinyl propionaldehyde microfiltration filter material Download PDFInfo
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- CN110624416A CN110624416A CN201910790727.7A CN201910790727A CN110624416A CN 110624416 A CN110624416 A CN 110624416A CN 201910790727 A CN201910790727 A CN 201910790727A CN 110624416 A CN110624416 A CN 110624416A
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- Prior art keywords
- sulfuric acid
- polyvinyl
- microfiltration
- propionaldehyde
- filter material
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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
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/147—Microfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0006—Organic membrane manufacture by chemical reactions
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a production method of a polyvinyl propionaldehyde microfiltration filter material, which comprises the following steps: (1) selecting 8% of polyvinyl alcohol, 6% of cassava flour and 86% of water by mass to prepare an aqueous solution mother liquor for later use; (2) stirring the mother solution at constant temperature of 100 deg.C for 2.5h to dissolve polyvinyl alcohol and cassava powder; (3) cooling the dissolved mother liquor, sequentially adding propionaldehyde and dilute sulfuric acid, and stirring for 30 minutes; (4) injecting the solution into a mould, and putting the mould into a water bath kettle for reaction to obtain a filter material blank; (5) cleaning and drying the blank; (6) and (5) finishing. The invention has simple manufacturing process and low manufacturing cost, and simultaneously, the produced microfiltration filter material has good microfiltration effect and good microfiltration effect on alcohols, hydrocarbons, ketones and aldehydes in the organic solvent, and can meet the requirement of high-purity microfiltration of the organic solvent.
Description
Technical Field
The invention belongs to the technical field of microfiltration, and particularly relates to a production method of a polyvinyl propionaldehyde-shrinking microfiltration filter material.
Background
Microfiltration, also known as microfiltration, uses a microporous membrane as a filtration medium to filter and retain particles between 0.1 and 1 micron. The microfiltration membrane is made of two types, namely inorganic membrane and organic polymer membrane, and the organic polymer membrane is also made of natural polymer membrane and synthetic polymer membrane. The existing synthetic polymer membranes generally adopt a dissolution method (dry-wet method), a stretching pore-forming method, a phase inversion method, a thermal phase method, a dip coating method, an irradiation method, a surface chemical modification method, a nuclear track method, a dynamic formation method and the like. At present, the production process of the organic microfiltration membrane is complex, and meanwhile, the microfiltration effect of the organic microfiltration membrane on alcohols, hydrocarbons, ketones and aldehydes in an organic solvent is general, and certain specific high-purity microfiltration work cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of providing a production method of a polyvinyl propionaldehyde microfiltration filter material aiming at the defects of the prior art.
The technical scheme adopted by the invention is as follows: a production method of a polyvinyl propionaldehyde microfiltration filter material comprises the following steps:
(1) preparing mother liquor, selecting 8% of polyvinyl alcohol, 6% of cassava powder and 86% of water by mass percent, and fully mixing and stirring the three raw materials for 30 minutes at normal temperature to prepare aqueous solution mother liquor for later use;
(2) dissolving mother liquor, uniformly stirring and heating the mother liquor to 100 ℃, maintaining the constant temperature of 100 ℃, and continuously stirring at a constant speed for 2.5 hours until the polyvinyl alcohol and the cassava powder are fully dissolved for later use;
(3) cooling, namely cooling the solution fully dissolved in the step (2) at a constant speed, sequentially adding propionaldehyde with the solution amount of 8% and dilute sulfuric acid with the solution amount of 5% after the temperature is reduced to below 38 ℃, and fully stirring for 30 minutes for later use;
(4) molding, namely injecting the solution prepared in the step (3) into a mold, and putting the mold into a water bath kettle to react for 10 hours at the temperature of 80 ℃ to obtain a filter material blank;
(5) cleaning the blank, removing burrs and corners of the formed and cooled blank, and cleaning and drying;
(6) and (3) drying the cleaned and blow-dried blank at the constant temperature of 50-70 ℃ to obtain the polyvinyl propionaldehyde microfiltration filter material.
Preferably, water can be added during the stirring process at the constant temperature of 100 ℃ in the step (2) to prevent the dry pot or the mother liquor from sticking to the pot.
Preferably, the dilute sulfuric acid in the step (3) is 50% sulfuric acid.
Preferably, the dilute sulfuric acid in the step (3) adopts concentrated sulfuric acid and water with a solution volume ratio of 1:1, wherein the concentrated sulfuric acid is sulfuric acid with a concentration of 98%.
Preferably, in the step (5), the blank is placed on a cleaning frame, cleaned for 30min by adopting water circulation of 0.3Mpa, and dried by adopting compressed air of 0.3 Mpa.
The invention has simple manufacturing process and low manufacturing cost, and simultaneously, the produced microfiltration filter material has good microfiltration effect and good microfiltration effect on alcohols, hydrocarbons, ketones and aldehydes in the organic solvent, and can meet the requirement of high-purity microfiltration of the organic solvent.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example (b):
the production method of the polyvinyl propionaldehyde microfiltration filter material provided by the embodiment comprises the following steps:
(1) preparing mother liquor, selecting 8% of polyvinyl alcohol, 6% of cassava powder and 86% of water by mass percent, and fully mixing and stirring the three raw materials for 30 minutes at normal temperature to prepare aqueous solution mother liquor for later use;
(2) dissolving mother liquor, uniformly stirring and heating the mother liquor to 100 ℃, maintaining the constant temperature of 100 ℃, continuously stirring at a constant speed for 2.5 hours, adding water in the stirring process to prevent the mother liquor from sticking to a dry pot or the mother liquor, and stopping heating and stirring after polyvinyl alcohol and cassava powder are fully dissolved;
(3) cooling, namely cooling the solution fully dissolved in the step (2) at a constant speed, sequentially adding propionaldehyde with the solution amount of 8% and dilute sulfuric acid with the solution amount of 5% after the temperature is reduced to below 38 ℃, wherein the concentration of the dilute sulfuric acid is 50%, adding the propionaldehyde and the dilute sulfuric acid, continuing cooling at a constant speed, fully stirring for 30 minutes in the cooling process, and stopping stirring;
(4) molding, namely injecting the solution prepared in the step (3) into a mold, and putting the mold into a water bath kettle to react for 10 hours at the temperature of 80 ℃ to obtain a filter material blank;
(5) cleaning the blank, removing burrs and corners of the formed and cooled blank, then placing the blank on a cleaning frame, cleaning for 30min by adopting water circulation of 0.3Mpa, and drying by adopting compressed air of 0.3 Mpa;
(6) and (3) drying the cleaned and blow-dried blank at the constant temperature of 50-70 ℃ to obtain the polyvinyl propionaldehyde microfiltration filter material.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention.
Claims (5)
1. A production method of a polyvinyl propionaldehyde microfiltration filter material is characterized in that: the method comprises the following steps:
(1) preparing mother liquor, selecting 8% of polyvinyl alcohol, 6% of cassava powder and 86% of water by mass percent, and fully mixing and stirring the three raw materials for 30 minutes at normal temperature to prepare aqueous solution mother liquor for later use;
(2) dissolving mother liquor, uniformly stirring and heating the mother liquor to 100 ℃, maintaining the constant temperature of 100 ℃, and continuously stirring at a constant speed for 2.5 hours until the polyvinyl alcohol and the cassava powder are fully dissolved for later use;
(3) cooling, namely cooling the solution fully dissolved in the step (2) at a constant speed, sequentially adding propionaldehyde with the solution amount of 8% and dilute sulfuric acid with the solution amount of 5% after the temperature is reduced to below 38 ℃, and fully stirring for 30 minutes for later use;
(4) molding, namely injecting the solution prepared in the step (3) into a mold, and putting the mold into a water bath kettle to react for 10 hours at the temperature of 80 ℃ to obtain a filter material blank;
(5) cleaning the blank, removing burrs and corners of the formed and cooled blank, and cleaning and drying;
(6) and (3) drying the cleaned and blow-dried blank at the constant temperature of 50-70 ℃ to obtain the polyvinyl propionaldehyde microfiltration filter material.
2. The method for producing a micro-filtration material of polyvinyl propionaldehyde according to claim 1, wherein: in the step (2), water can be added in the stirring process at the constant temperature of 100 ℃ to prevent the dry pot or the mother liquor from sticking to the pot.
3. The method for producing a micro-filtration material of polyvinyl propionaldehyde according to claim 1, wherein: the dilute sulfuric acid in the step (3) is sulfuric acid with the concentration of 50%.
4. The method for producing a micro-filtration material of polyvinyl propionaldehyde according to claim 1 or 3, wherein: in the step (3), concentrated sulfuric acid and water with the solution volume ratio of 1:1 are adopted as the dilute sulfuric acid, wherein the concentrated sulfuric acid is sulfuric acid with the concentration of 98%.
5. The method for producing a micro-filtration material of polyvinyl propionaldehyde according to claim 1, wherein: and (5) placing the blank on a cleaning frame, cleaning for 30min by adopting water circulation of 0.3Mpa, and drying by adopting compressed air of 0.3 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790727.7A CN110624416A (en) | 2019-08-26 | 2019-08-26 | Production method of polyvinyl propionaldehyde microfiltration filter material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790727.7A CN110624416A (en) | 2019-08-26 | 2019-08-26 | Production method of polyvinyl propionaldehyde microfiltration filter material |
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| CN110624416A true CN110624416A (en) | 2019-12-31 |
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| CN201910790727.7A Pending CN110624416A (en) | 2019-08-26 | 2019-08-26 | Production method of polyvinyl propionaldehyde microfiltration filter material |
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Citations (7)
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|---|---|---|---|---|
| US5112487A (en) * | 1988-09-29 | 1992-05-12 | Toray Industries, Inc. | Porous membrane and production process thereof |
| US20050103716A1 (en) * | 2002-01-28 | 2005-05-19 | Jiang Ji | Method of making and using a hollow fiber microfiltration membrane |
| CN101199918A (en) * | 2006-12-14 | 2008-06-18 | 上海世龙科技有限公司 | Process for preparing polymer microporous membrane and usage of same |
| CN101234303A (en) * | 2007-11-13 | 2008-08-06 | 成都市青白江区富发膜过滤器材有限公司 | Polyvinyl formal microfilter membrane and method for preparing filter sheet |
| CN102151495A (en) * | 2011-01-20 | 2011-08-17 | 银永发 | Preparation method of Polyvinyl Butyral (PVB) microfiltration membrane |
| CN102151496A (en) * | 2011-01-20 | 2011-08-17 | 成都市青白江区富发膜过滤器材有限公司 | Method for preparing polyvinyl formal (PVF) micro-filtration membrane |
| CN102921312A (en) * | 2012-11-01 | 2013-02-13 | 北京市射线应用研究中心 | Polyvinyl formal filtering membrane and preparation method thereof |
-
2019
- 2019-08-26 CN CN201910790727.7A patent/CN110624416A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5112487A (en) * | 1988-09-29 | 1992-05-12 | Toray Industries, Inc. | Porous membrane and production process thereof |
| US20050103716A1 (en) * | 2002-01-28 | 2005-05-19 | Jiang Ji | Method of making and using a hollow fiber microfiltration membrane |
| CN101199918A (en) * | 2006-12-14 | 2008-06-18 | 上海世龙科技有限公司 | Process for preparing polymer microporous membrane and usage of same |
| CN101234303A (en) * | 2007-11-13 | 2008-08-06 | 成都市青白江区富发膜过滤器材有限公司 | Polyvinyl formal microfilter membrane and method for preparing filter sheet |
| CN102151495A (en) * | 2011-01-20 | 2011-08-17 | 银永发 | Preparation method of Polyvinyl Butyral (PVB) microfiltration membrane |
| CN102151496A (en) * | 2011-01-20 | 2011-08-17 | 成都市青白江区富发膜过滤器材有限公司 | Method for preparing polyvinyl formal (PVF) micro-filtration membrane |
| CN102921312A (en) * | 2012-11-01 | 2013-02-13 | 北京市射线应用研究中心 | Polyvinyl formal filtering membrane and preparation method thereof |
Non-Patent Citations (2)
| Title |
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| 吴振球等: "《高分子化合物的毒性和防护》", 31 January 1974, 人民卫生出版社 * |
| 王曙中等: "《高科技纤维概论》", 30 June 2014, 东华大学出版社 * |
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