CN102887985A - Waterborne polyurethane resin production method without wastewater discharge - Google Patents
Waterborne polyurethane resin production method without wastewater discharge Download PDFInfo
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- CN102887985A CN102887985A CN2011102060056A CN201110206005A CN102887985A CN 102887985 A CN102887985 A CN 102887985A CN 2011102060056 A CN2011102060056 A CN 2011102060056A CN 201110206005 A CN201110206005 A CN 201110206005A CN 102887985 A CN102887985 A CN 102887985A
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- polyurethane resin
- reaction kettle
- waterborne polyurethane
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Abstract
The invention relates to a waterborne polyurethane resin production method without wastewater discharge. The waterborne polyurethane resin is produced by two reaction kettles in a two-section mode; the first reaction kettle is used for performing production processes of feeding, dehydration, cooling, charging, pre-polymerization reaction, cooling, dissolution and chain extension; and the second reaction kettle is used for performing subsequent production processes of emulsification, solvent removal and discharge, and a condensation device is arranged. After the first reaction kettle finishes the production processes, the material is transferred to the second reaction kettle, and meanwhile, the condensation device condensates and collects the solvent acetone evaporated in the material kettle transfer process. After the material kettle transfer, the second reaction kettle condensates the collected solvent acetone and cleans the material attached to the wall of the first reaction kettle, and transfers the cleaning solution into the second reaction kettle. According to the invention, the original production technology is not changed basically, the two-kettle two-section type circular production is adopted, the time and labor are not wasted, the consumption of water and alkali is avoided, clean production without wastewater discharge is realized, and the environment-friendly disposing pressure and production cost are greatly reduced.
Description
Technical field
The present invention relates to a kind of waterborne polyurethane resin production method of waterborne polyurethane resin production method, particularly a kind of non-wastewater discharge.
Background technology
Waterborne polyurethane resin is the main raw material of allotment water-based polyurethane adhesive and coating, and present known waterborne polyurethane resin production method generally adopts step production method, and the full scale production process is all finished in a reactor.Behind the product discharge, want water to rinse out to stick to the urethane resin on the still wall, sticking ratio is tighter rushes indelible urethane resin, also to use thermokalite water soaking for some time, make urethane resin under the effect of thermokalite water, degrade, come off, sneak in the water, scrub with brush again and clean with flushing with clean water, and after the drying, just can carry out the production of next batch.Because cleaning once needs about 5 hours, whenever wash still No. one time, all to consume a large amount of water, alkali, steam (electric energy), artificial and time, the urethane resin product that also will stick on the still wall also rinses out, cause a large amount of discharge of wastewater and very large waste, greatly improved environment protection treating pressure and production cost.Therefore, in the urgent need to a kind ofly need not time-consumingly take a lot of work, water consumption consumption alkali cleaning still, the waterborne polyurethane resin production method of non-wastewater discharge.
Summary of the invention
The purpose of this invention is to provide a kind of problems such as washing still is time-consumingly taken a lot of work, water consumption consumption alkali that can solve, the waterborne polyurethane resin production method of accomplishing non-wastewater discharge.
Technical scheme of the present invention is: adopt two reactor two-parts to produce waterborne polyurethane resin,---dehydration---cooling---reinforced---prepolymerization reaction---cooling---dissolving---chain extension production process that first reactor is used for feeding intake, second reactor is used for carrying out follow-up emulsification---desolvation---discharging production process, and is provided with condensing works.After first reactor is finished production process, material is transferred to second reactor by vacuum transmission system, condensing works is collected the solvent acetone condensation that material turns the evaporation of still process simultaneously.Material turns still finish after, collecting the solvent acetone of getting off with second reactor condensation cleans first reactor and sticks to material on the still wall, and scavenging solution all transferred in second reactor more immediately first reactor work that can again feed intake by vacuum transmission system.Accept second reactor of material, after finishing follow-up operation, the material that then carries out again turns still and production.
Characteristics of the present invention are substantially not change original production technique, adopt the production that moves in circles of two still two-parts, not time-consumingly take a lot of work, water consumption consumption alkali, have realized the cleaner production of non-wastewater discharge, greatly reduce environment protection treating pressure and production cost.
Below in conjunction with embodiment the present invention is further specified.
Embodiment
A kind of embodiment of the present invention is, adopt two reactor two-parts to produce waterborne polyurethane resin,---dehydration---cooling---reinforced---prepolymerization reaction---cooling---dissolving---chain extension production process that first reactor is used for feeding intake, second reactor is used for carrying out follow-up emulsification---desolvation---discharging production process, and is provided with condensing works.During work, finish at first reactor and to feed intake that---------reinforced------cooling---dissolving---is after the chain extension production process for prepolymerization reaction in cooling in dehydration, material is transferred to second reactor by vacuum transmission system, and condensing works is collected the solvent acetone condensation that material turns the evaporation of still process simultaneously.Material turns still finish after, the solvent acetone dissolving of collecting the soluble material of getting off with second reactor condensation is cleaned first reactor and is sticked to material on the still wall, and scavenging solution all transferred in second reactor more immediately first reactor work that again feeds intake by vacuum transmission system.Accept second reactor of material, after---desolvation---discharging production process of finishing follow-up emulsification, namely produce waterborne polyurethane resin, and the material that then carries out again turns still and production.
Claims (2)
1. the waterborne polyurethane resin production method of a non-wastewater discharge, it is characterized in that adopting two reactor two-parts to produce waterborne polyurethane resin,---dehydration---cooling---reinforced---prepolymerization reaction---cooling---dissolving---chain extension production process that first reactor is used for feeding intake, second reactor is used for carrying out follow-up emulsification---desolvation---discharging production process, and is provided with condensing works.
2. the waterborne polyurethane resin production method of a kind of non-wastewater discharge according to claim 1, it is characterized in that after first reactor is finished production process, material is transferred to second reactor, and condensing works is collected the acetone condensation that material turns the evaporation of still process simultaneously; Material turns still finish after, collect the solvent acetone of getting off with second reactor condensation and clean first reactor and stick to material on the still wall, and scavenging solution is transferred in second reactor, immediately first reactor work that again feeds intake; Accept second reactor of material, after finishing follow-up producing process, the material that then carries out again turns still and production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102060056A CN102887985A (en) | 2011-07-19 | 2011-07-19 | Waterborne polyurethane resin production method without wastewater discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102060056A CN102887985A (en) | 2011-07-19 | 2011-07-19 | Waterborne polyurethane resin production method without wastewater discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102887985A true CN102887985A (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102060056A Pending CN102887985A (en) | 2011-07-19 | 2011-07-19 | Waterborne polyurethane resin production method without wastewater discharge |
Country Status (1)
| Country | Link |
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| CN (1) | CN102887985A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438257A (en) * | 2003-03-06 | 2003-08-27 | 华南理工大学 | Acrylic polyurethane copolymer emulsion, its preparation method and use |
| CN101481451A (en) * | 2009-01-23 | 2009-07-15 | 华南理工大学 | High solid content latent curing polyurethane acroleic acid hybrid emulsion |
| CN102002166A (en) * | 2010-10-11 | 2011-04-06 | 中国海洋石油总公司 | Hydroxylated polyurethane water dispersoid for waterborne soft-feel coating and preparation method thereof |
| CN102093534A (en) * | 2010-12-26 | 2011-06-15 | 华南理工大学 | Preparation method of polyurethane aqueous dispersion and waterborne polyurethane paint containing polyurethane aqueous dispersion |
-
2011
- 2011-07-19 CN CN2011102060056A patent/CN102887985A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438257A (en) * | 2003-03-06 | 2003-08-27 | 华南理工大学 | Acrylic polyurethane copolymer emulsion, its preparation method and use |
| CN101481451A (en) * | 2009-01-23 | 2009-07-15 | 华南理工大学 | High solid content latent curing polyurethane acroleic acid hybrid emulsion |
| CN102002166A (en) * | 2010-10-11 | 2011-04-06 | 中国海洋石油总公司 | Hydroxylated polyurethane water dispersoid for waterborne soft-feel coating and preparation method thereof |
| CN102093534A (en) * | 2010-12-26 | 2011-06-15 | 华南理工大学 | Preparation method of polyurethane aqueous dispersion and waterborne polyurethane paint containing polyurethane aqueous dispersion |
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Application publication date: 20130123 |