CN105601988A - Preparation method of regenerated polyvinyl acetate emulsion - Google Patents
Preparation method of regenerated polyvinyl acetate emulsion Download PDFInfo
- Publication number
- CN105601988A CN105601988A CN201610054374.0A CN201610054374A CN105601988A CN 105601988 A CN105601988 A CN 105601988A CN 201610054374 A CN201610054374 A CN 201610054374A CN 105601988 A CN105601988 A CN 105601988A
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- CN
- China
- Prior art keywords
- polyvinyl acetate
- emulsion
- water
- acetate emulsion
- preparation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
- C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2331/00—Characterised by the use of copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, or carbonic acid, or of a haloformic acid
- C08J2331/02—Characterised by the use of omopolymers or copolymers of esters of monocarboxylic acids
- C08J2331/04—Homopolymers or copolymers of vinyl acetate
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention discloses a method for converting polyvinyl acetate residues into a redispersible polyvinyl acetate emulsion. Due to the fact that the polyvinyl acetate residues can be dissolved in solvent, the polyvinyl acetate residues are converted into a water-in-oil emulsion, phase inversion is conducted, the water-in-oil emulsion is converted into an oil-in-water emulsion, and the purpose that the polyvinyl acetate residues can be evenly dispersed in water again is achieved. The waste is turned into wealth, the situation that solid waste is discharged into the environment is effectively eradicated, the production cost is reduced, and good environmental and economic benefits are achieved.
Description
Technical field
The present invention relates to a kind of preparation method of the polyvinyl acetate emulsion of regenerating, refer in particular to a kind of preparation method who utilizes vinyl acetate waste residue regeneration polyvinyl acetate emulsion.
Background technology
Polyvinyl acetate emulsion, has the advantages such as nontoxic, pollution-free, adhesive property is good, is commonly called as milky white adhesive. Be widely used in industries such as timber, weaving, coating, paper conversion, buildings, but in building-up process due to the reason of raw material, and the grasp error of operator to technique, easily cause in building-up process, generation particle is excessive, form water-fast polyvinyl acetate residue, the lighter causes the quality of product to decline, the serious waste product that becomes. For solving waste disposal problem, except burying processing, use without it. This residue treatment is brought a lot of troubles to factory. If can turn waste into wealth, can get up effectively to process these residues, can create again good economic benefit.
Chinese patent CN101747457B discloses a kind of " by vinyl acetate kettle bottom waste residue production polyvinyl alcohol and redispersable latex powder method ", this invention substitutes polyvinyl alcohol and Vinyl Acetate Monomer with vinyl acetate kettle bottom waste residue, can cheaply obtain polyvinyl alcohol water solution and polyvinyl acetate emulsion. Spray-dried polyvinyl alcohol and redispersable latex powder product and the thick acetic acid of by-product made. The waste residue that this patent produces while being process for producing vinyl acetate raw material.
Summary of the invention
The object of the present invention is to provide a kind of method that can effectively recycle polyvinyl acetate residue, the method for the waste product producing when disposal and utilization vinyl acetate raw material is produced the resin of polyvinyl acetate.
Goal of the invention solves by the following technical programs.
The regenerate preparation method of polyvinyl acetate emulsion, the method comprises with step as follows,
Step 1, leaches the water-soluble thing in polyvinyl acetate waste residue, controls the alap moisture content of waste residue;
Step 2 adds organic solvent in the polyvinyl acetate waste residue after being filtered dry, and makes it to be dissolved in organic solvent, and described organic solvent is a kind of or two kinds and the multiple mixture in methyl alcohol, ethanol, isopropyl alcohol, acetone and chloromethanes;
Step 3 slowly adds clear water in step 2 gained melt, after fully stirring, makes emulsion oil-in-water;
Step 4, is warming up to 70～80 DEG C by step 3 gained emulsion and carries out decompression distillation, gets rid of partial solvent, obtains water miscible regeneration polyvinyl acetate emulsion.
Wherein, the mass ratio of described organic solvent and waste residue is: 3～1:1; In described step 3, the consumption of water is melt 60%～200%; In step 4, after being heated up, step 3 gained emulsion carries out decompression distillation 1～2 hour. In addition, also comprise step 5, the recycled water dissolubility polyvinyl acetate emulsion obtaining is mixed in the ratio of 1:1～2 with the qualified polyvinyl acetate emulsion of producing routinely gained, stir, detect indices, qualified rear packaging.
The present invention compared with prior art, producing when polyvinyl acetate emulsion, many guarantees; the product rejection causing because of a variety of causes in the time producing exactly; all do not worry how processing these waste products, utilize technology of the present invention to turn waste into wealth, and effectively protected environment.
Detailed description of the invention
The basic preparation method who the invention discloses a kind of polyvinyl acetate emulsion of regenerating, the method comprises with step as follows,
Step 1, leaches the water-soluble thing in polyvinyl acetate waste residue, controls the alap moisture content of waste residue;
Step 2 adds organic solvent in the polyvinyl acetate waste residue after being filtered dry, and makes it to be dissolved in organic solvent, and described organic solvent is a kind of or two kinds and the multiple mixture in methyl alcohol, ethanol, isopropyl alcohol, acetone and chloromethanes;
Step 3 slowly adds clear water in step 2 gained melt, after fully stirring, makes emulsion oil-in-water;
Step 4, is warming up to 70～80 DEG C by step 3 gained emulsion and carries out decompression distillation, gets rid of partial solvent, obtains water miscible regeneration polyvinyl acetate emulsion.
Wherein, the mass ratio of described organic solvent and waste residue is: 3～1:1; In described step 3, the consumption of water is melt 60%～200%; In step 4, after being heated up, step 3 gained emulsion carries out decompression distillation 1～2 hour. In addition, also comprise step 5, the recycled water dissolubility polyvinyl acetate emulsion obtaining is mixed in the ratio of 1:1～2 with the qualified polyvinyl acetate emulsion of producing routinely gained, stir, detect indices, qualified rear packaging.
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1.
Step 1, by static polyvinyl acetate waste liquid placement more than 2 days, allows its precipitated and separated, takes out supernatant liquor reuse, and 500 kilograms of remaining solid slags are poured in reactor;
Step 2, to adding 300 kilograms, 500 kilograms of solvent methanols and acetone in the still of step 1, then, starts and stirs, and stir about 4 hours, stops stirring;
Step 3 slowly adds running water in the still of step 2, adds by the speed of 1 kg/minute, adds 1000 kilograms, water;
Step 4, is warmed up to 80 DEG C by the still of step 3, under-0.06MPa pressure, and decompression distillation 2 hours, distillate stores reuse;
Step 5, emits the material filtering of step 4, then mixes with 2000 kilograms of qualified polyvinyl acetate, stirs, and detects indices, qualified rear packaging.
Embodiment 2.
Step 1, by static polyvinyl acetate waste liquid placement more than 2 days, allows its precipitated and separated, takes out supernatant liquor reuse, and 500 kilograms of remaining solid slags are poured in reactor;
Step 2 adds 1000 kilograms of etoh solvents in the still of step 1, then, starts and stirs, and stir about 4 hours, stops stirring;
Step 3 slowly adds running water in the still of step 2, adds by the speed of 1 kg/minute, adds 500 kilograms, water;
Step 4, is warmed up to 80 DEG C by the still of step 3, under-0.06MPa pressure, and decompression distillation 2 hours, distillate stores reuse;
Step 5, emits the material filtering of step 4, then mixes with 1500 kilograms of qualified polyvinyl acetate, stirs, and detects indices, qualified rear packaging.
Embodiment 3.
Step 1, by static polyvinyl acetate waste liquid placement more than 2 days, allows its precipitated and separated, takes out supernatant liquor reuse, and 500 kilograms of remaining solid slags are poured in reactor;
Step 2, to adding 600 kilograms of 200 kilograms of solvent methanols and isopropyl alcohols in the still of step 1, then, starts and stirs, and stir about 4 hours, stops stirring;
Step 3 slowly adds running water in the still of step 2, adds by the speed of 1 kg/minute, adds 800 kilograms, water;
Step 4, is warmed up to 80 DEG C by the still of step 3, under-0.06MPa pressure, and decompression distillation 2 hours, distillate stores reuse;
Step 5, emits the material filtering of step 4, then mixes with 1000 kilograms of qualified polyvinyl acetate, stirs, and detects indices, qualified rear packaging.
Above-described embodiment is only to the enumerating of inventor's thinking, and the present invention is not done to pro forma restriction, though because the composition of industrial waste is essentially constant under different regions and different source, the change of divergence is sure. Anyone appropriation on thinking of the present invention basis, all forms infringement of the present invention.
Claims (5)
1. the regenerate preparation method of polyvinyl acetate emulsion, the method comprises with step as follows,
Step 1, leaches the water-soluble thing in polyvinyl acetate waste residue, controls the alap moisture content of waste residue;
Step 2 adds organic solvent in the polyvinyl acetate waste residue after being filtered dry, and makes it to be dissolved in organic solvent, and described organic solvent is a kind of or two kinds and the multiple mixture in methyl alcohol, ethanol, isopropyl alcohol, acetone and chloromethanes;
Step 3 slowly adds clear water in step 2 gained melt, after fully stirring, makes emulsion oil-in-water;
Step 4, is warming up to 70～80 DEG C by step 3 gained emulsion and carries out decompression distillation, gets rid of partial solvent, obtains water miscible regeneration polyvinyl acetate emulsion.
2. the preparation method of regeneration polyvinyl acetate emulsion according to claim 1, is characterized in that, the mass ratio of described organic solvent and waste residue is: 3～1:1.
3. the preparation method of regeneration polyvinyl acetate emulsion according to claim 2, is characterized in that, in described step 3, the consumption of water is melt 60%～200%.
4. the preparation method of regeneration polyvinyl acetate emulsion according to claim 3, is characterized in that, in step 4, after step 3 gained emulsion is heated up, carries out decompression distillation 1～2 hour.
5. according to the preparation method of the regeneration polyvinyl acetate emulsion described in any one in claim 1 to 4, it is characterized in that, also comprise step 5, the recycled water dissolubility polyvinyl acetate emulsion obtaining is mixed in the ratio of 1:1～2 with the qualified polyvinyl acetate emulsion of producing routinely gained, stir, detect indices, qualified rear packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610054374.0A CN105601988A (en) | 2016-01-27 | 2016-01-27 | Preparation method of regenerated polyvinyl acetate emulsion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610054374.0A CN105601988A (en) | 2016-01-27 | 2016-01-27 | Preparation method of regenerated polyvinyl acetate emulsion |
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| CN105601988A true CN105601988A (en) | 2016-05-25 |
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| CN201610054374.0A Pending CN105601988A (en) | 2016-01-27 | 2016-01-27 | Preparation method of regenerated polyvinyl acetate emulsion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106432795A (en) * | 2016-08-08 | 2017-02-22 | 桂林市春晓环保科技有限公司 | Recovery technology of polyvinyl acetate waste |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1736974A (en) * | 2005-07-08 | 2006-02-22 | 万效温 | Special alembic for disposing vinyl acetate waste slag of alembic bottom and waste slag processing method |
| CN1764494A (en) * | 2003-10-29 | 2006-04-26 | 万效温 | The integrated conduct method of vinyl acetate kettle bottom waste residue |
| CN101747457A (en) * | 2008-12-12 | 2010-06-23 | 万效温 | Method for producing polyvinylalcohol and re-dispersible emulsion powder with vinyl acetate kettle bottom waste residue |
-
2016
- 2016-01-27 CN CN201610054374.0A patent/CN105601988A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1764494A (en) * | 2003-10-29 | 2006-04-26 | 万效温 | The integrated conduct method of vinyl acetate kettle bottom waste residue |
| CN1736974A (en) * | 2005-07-08 | 2006-02-22 | 万效温 | Special alembic for disposing vinyl acetate waste slag of alembic bottom and waste slag processing method |
| CN101747457A (en) * | 2008-12-12 | 2010-06-23 | 万效温 | Method for producing polyvinylalcohol and re-dispersible emulsion powder with vinyl acetate kettle bottom waste residue |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106432795A (en) * | 2016-08-08 | 2017-02-22 | 桂林市春晓环保科技有限公司 | Recovery technology of polyvinyl acetate waste |
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Application publication date: 20160525 |
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