CN102276872A - Method for refining recovery monomers in polyvinyl chloride polymerization process - Google Patents
Method for refining recovery monomers in polyvinyl chloride polymerization process Download PDFInfo
- Publication number
- CN102276872A CN102276872A CN2011101346183A CN201110134618A CN102276872A CN 102276872 A CN102276872 A CN 102276872A CN 2011101346183 A CN2011101346183 A CN 2011101346183A CN 201110134618 A CN201110134618 A CN 201110134618A CN 102276872 A CN102276872 A CN 102276872A
- Authority
- CN
- China
- Prior art keywords
- monomer
- polyvinyl chloride
- chloride polymerization
- storage tank
- monomers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention relates to a method for refining recovery monomers in a polyvinyl chloride polymerization process. In the method, a recovery monomer storage groove, a solid caustic soda dryer, an alkali collecting groove, a coarse monomer storage groove, a high boiling tower, a tower top cooler and a refined monomer storage groove which are connected with one another sequentially are provided. In the polyvinyl chloride polymerization process, unreacted monomers and monomers generated by abnormal polymerization are recovered and treated by a deep dehydration and rectification technology, so harmful substances such as an initiator, a dispersing agent, acidic substances, iron ions and the like are effectively removed from the recovered monomers, the problem of reusing of the chloroethylene monomers recovered in the polyvinyl chloride polymerization process is solved, the utilization ratio of resources is increased, environmental pollution caused by the monomers is effectively avoided, and production rate and product quality of the polymerization are improved. The method can be widely applied to the polyvinyl chloride polymerization process and is particularly applicable to the polyvinyl chloride polymerization process by a calcium carbide method.
Description
Technical field:
The present invention relates to reclaim monomer purified method in a kind of polyvinyl chloride polymerization operation, comprise two kinds of technology of deep dehydration and rectifying, particularly be applicable in the generated by polyvinyl chloride by calcium carbide polymerization process.
Background technology:
Vinylchlorid by suspension polymerization production polyvinyl chloride (PVC) RESINS (PVC) in, vinyl chloride monomer (VCM) transformation efficiency generally is controlled at 80%-85%, the monomer that unreacted monomer and undesired polyreaction produce must all carry out recycling, otherwise can increase production cost and cause environmental pollution, the MONOMER RECOVERY Technology not only can influence the monomeric rate of recovery and polyvinyl chloride resin quality product, and can influence the throughput and the running cost of production equipment.
At home in the generated by polyvinyl chloride by calcium carbide manufacturing enterprise, the recovery technology of vinyl chloride monomer is to adopt cyclonic separator to remove mist and the PVC particle of carrying secretly in the monomer mostly, directly delivering to the vinylchlorid gas holder then mixes with the synthetic thick VCM gas that transforms, through overdraft, it is refining to enter distillation system after the condensation jointly, it is stand-by that monomer after refining enters the monomer storage tank, owing in polyreaction, added initiator, dispersion agent isoreactivity free radical, living radical enters the leading portion operation with reclaiming monomer, the autohemagglutination phenomenon takes place easily, cause pipeline and rectifying tower to stop up, and influence the quality of ordinary production and product, in addition, trace acidic material that contains in the recovery monomer and iron ion cause the corrosion to process pipe and equipment easily.
Summary of the invention:
The invention solves in the prior art because of containing the problem of initiator, dispersion agent isoreactivity free radical and acidic substance and iron ion in the vinyl chloride monomer that reclaims, and then provide a kind of can fully the removal to reclaim the objectionable impurities that contains in the monomer, make vinylchlorid reclaim monomer and can realize recycle effectively, make the obvious method that improves of quality product of polyvinyl chloride resin simultaneously.
The technical solution used in the present invention is: reclaim monomer purified method in a kind of polyvinyl chloride polymerization operation of the present invention; Comprise successively the recovery monomer storage tank, solid caustic soda moisture eliminator, collection alkali groove, crude monomer storage tank, the height that link to each other boil tower, cat head water cooler, smart monomer storage tank; In the polyvinyl chloride polymerization operation, the recovery monomer of compression condensation post condensation enters newly-increased polymerization and reclaims the monomer storage tank, and toward the rectifying post, the crude monomer in polymeric compressing condensation post is with being pumped into the solid caustic soda moisture eliminator by the crude monomer pumping; Crude monomer enters the crude monomer storage tank behind solid caustic soda moisture eliminator deep dehydration, send into the height tower rectifying of boiling by the high tower fresh feed pump; Crude monomer is refined into the vinyl chloride monomer that meets index through too high boil tower fractionation and the cooling of cat head water cooler, enters smart monomer storage tank then, is sent to polymerization by smart monomer take away pump and reclaims the monomer storage tank, in order to the use that feeds intake to polymeric kettle.
Reclaim monomer purified method in described a kind of polyvinyl chloride polymerization operation, the boil tower tray of tower of height adopts the continuous sieve plate of ejection-type, this sieve plate surface gas-liquid mixture has very high jet flow speed in mass transfer process, gas channel is washed away, cause autopolymer to form, have very strong anti-blockage capability.
Reclaim monomer purified method in described a kind of polyvinyl chloride polymerization operation, after the deep dehydration technical finesse, vinylchlorid reclaims hydrogen chloride content≤20PPM in the monomer, iron ion content≤20PPM, monomer water content≤200PPM.
Reclaim monomer purified method in described a kind of polyvinyl chloride polymerization operation, after handling through distillation technology, vinylchlorid reclaims in the monomer high boiling material foreign matter content≤20PPM such as ethylene dichloride, low-boiling-point substance foreign matter content≤10PPM such as acetylene.
Reclaim monomer purified method in described a kind of polyvinyl chloride polymerization operation, through the rate of recovery 〉=99% of refining back vinyl chloride monomer.
The present invention is by studying and recycle the monomer of unreacted monomer in the Production of PVC and the generation of undesired polyreaction, solved the difficult problem of the vinyl chloride monomer cycling and reutilization that reclaims in the polyvinyl chloride polymerization operation, not only improved resource utilization, effectively avoid the monomer pollution on the environment, and significantly improved the productivity and the quality product of polyreaction.The present invention can be widely used in particularly being applicable in the generated by polyvinyl chloride by calcium carbide polymerization process in the polyvinyl chloride polymerization operation.
Description of drawings:
Fig. 1 is the embodiments of the invention process flow sheet;
Among Fig. 1: 1 for crude monomer storage tank, 5 for height boil tower, 6 for cat head water cooler, 7 is smart monomer storage tank for collection alkali groove, 4 for reclaiming monomer storage tank, 2 for solid caustic soda moisture eliminator, 3;
Specific embodiments:
With reference to accompanying drawing 1, present embodiment comprises successively the recovery monomer storage tank 1, solid caustic soda moisture eliminator 2, collection alkali groove 3, crude monomer storage tank 4, the height that link to each other boil tower 5, cat head water cooler 6, smart monomer storage tank 7; In the polyvinyl chloride polymerization operation, the recovery monomer of compression condensation post condensation enters newly-increased polymerization and reclaims the monomer storage tank, and toward the rectifying post, the crude monomer in polymeric compressing condensation post is with being pumped into the solid caustic soda moisture eliminator by the crude monomer pumping; Crude monomer enters the crude monomer storage tank behind solid caustic soda moisture eliminator deep dehydration, send into the height tower rectifying of boiling by the high tower fresh feed pump; Crude monomer is refined into the vinyl chloride monomer that meets index through too high boil tower fractionation and the cooling of cat head water cooler, enters smart monomer storage tank then, is sent to polymerization by smart monomer take away pump and reclaims the monomer storage tank, in order to the use that feeds intake to polymeric kettle; The concentrated base that the solid caustic soda moisture eliminator produces regularly enters collection alkali groove, behind the logical hot water heating recovery monomer, is sent to synthetic water alkali cleaning post by alkali pump and uses.
Another embodiment difference is that the whiteness of polyvinyl chloride resin product brings up to 92 by 82;
Another embodiment difference is that the apparent density of polyvinyl chloride resin product brings up to 0.56 by 0.52;
Another embodiment difference is that the oil absorbency of polyvinyl chloride resin product brings up to 26 by 21.
Claims (6)
1. reclaim monomer purified method in the polyvinyl chloride polymerization operation, it is characterized in that: comprise the recovery monomer storage tank, solid caustic soda moisture eliminator, collection alkali groove, crude monomer storage tank, the height that link to each other successively boil tower, cat head water cooler, smart monomer storage tank; In the polyvinyl chloride polymerization operation, the recovery monomer of compression condensation post condensation enters newly-increased polymerization and reclaims the monomer storage tank, and toward the rectifying post, the crude monomer in polymeric compressing condensation post is with being pumped into the solid caustic soda moisture eliminator by the crude monomer pumping; Crude monomer enters the crude monomer storage tank behind solid caustic soda moisture eliminator deep dehydration, send into the height tower rectifying of boiling by the high tower fresh feed pump; Crude monomer is refined into the vinyl chloride monomer that meets index through too high boil tower fractionation and the cooling of cat head water cooler, enters smart monomer storage tank then, is sent to polymerization by smart monomer take away pump and reclaims the monomer storage tank, in order to the use that feeds intake to polymeric kettle; The concentrated base that the solid caustic soda moisture eliminator produces regularly enters collection alkali groove, behind the logical hot water heating recovery monomer, is sent to synthetic water alkali cleaning post by alkali pump and uses.
2. according to reclaiming monomer purified method in claims 1 described polyvinyl chloride polymerization operation, it is characterized in that: in the polyvinyl chloride polymerization operation, adopt deep dehydration and two kinds of technology of rectifying that the vinyl chloride monomer that reclaims is carried out refinement treatment.
3. according to reclaiming monomer purified method in claims 2 described polyvinyl chloride polymerization operations, it is characterized in that: adopt the solid caustic soda moisture eliminator that the vinyl chloride monomer that reclaims is carried out deep dehydration and handle.
4. according to reclaiming monomer purified method in claims 2 described polyvinyl chloride polymerization operations, it is characterized in that: adopt the high tower that boils that the vinyl chloride monomer that reclaims is carried out rectification process.
5. according to reclaiming monomer purified method in claims 4 described polyvinyl chloride polymerization operations, it is characterized in that: the boil tower tray of tower of height adopts the continuous sieve plate of ejection-type.
6. according to reclaiming monomer purified method in the described polyvinyl chloride polymerization operation of claims 1-5, it is characterized in that: the DCS Controlling System that in polyvinyl chloride polymerization MONOMER RECOVERY technology, adopts independent research.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101346183A CN102276872A (en) | 2011-05-24 | 2011-05-24 | Method for refining recovery monomers in polyvinyl chloride polymerization process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101346183A CN102276872A (en) | 2011-05-24 | 2011-05-24 | Method for refining recovery monomers in polyvinyl chloride polymerization process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102276872A true CN102276872A (en) | 2011-12-14 |
Family
ID=45102635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101346183A Pending CN102276872A (en) | 2011-05-24 | 2011-05-24 | Method for refining recovery monomers in polyvinyl chloride polymerization process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102276872A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104262082A (en) * | 2014-01-20 | 2015-01-07 | 河北化大科技有限公司 | A rectification separation and purification technology in a polyvinyl chloride production process |
| CN105175216A (en) * | 2015-08-31 | 2015-12-23 | 山东蓝帆化工有限公司 | Recovery method and device for vinyl chloride monomer in chloromethane-contained chloroethylene material |
| CN105664518A (en) * | 2016-02-06 | 2016-06-15 | 内蒙古晨宏力化工集团有限责任公司 | Method and system for adjusting acidity and alkalinity of water in vinyl chloride rectification process |
| CN107501039A (en) * | 2017-07-28 | 2017-12-22 | 石河子开发区天业化工有限责任公司 | A kind of control method of vinyl chloride high boiling tower blowdown and recovery |
-
2011
- 2011-05-24 CN CN2011101346183A patent/CN102276872A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104262082A (en) * | 2014-01-20 | 2015-01-07 | 河北化大科技有限公司 | A rectification separation and purification technology in a polyvinyl chloride production process |
| CN105175216A (en) * | 2015-08-31 | 2015-12-23 | 山东蓝帆化工有限公司 | Recovery method and device for vinyl chloride monomer in chloromethane-contained chloroethylene material |
| CN105175216B (en) * | 2015-08-31 | 2017-03-01 | 山东蓝帆化工有限公司 | The recovery method of Vinyl Chloride Monomer and device in vinyl chloride material containing chloromethanes |
| CN105664518A (en) * | 2016-02-06 | 2016-06-15 | 内蒙古晨宏力化工集团有限责任公司 | Method and system for adjusting acidity and alkalinity of water in vinyl chloride rectification process |
| CN105664518B (en) * | 2016-02-06 | 2018-08-31 | 内蒙古晨宏力化工集团有限责任公司 | Acid-base value method and system for adjusting water in VCM rectification process |
| CN107501039A (en) * | 2017-07-28 | 2017-12-22 | 石河子开发区天业化工有限责任公司 | A kind of control method of vinyl chloride high boiling tower blowdown and recovery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102492490A (en) | Gas purification process and system | |
| CN102276872A (en) | Method for refining recovery monomers in polyvinyl chloride polymerization process | |
| CN103613126B (en) | A kind of method and system removing vanadium impurity from titanic tetrachloride | |
| CN103553048A (en) | Method and system for cyclic utilization of materials during production of polycrystalline silicon | |
| CN204400885U (en) | The purification and recover equipment of solvent dimethyl sulfoxide (DMSO) in a kind of carbon fiber production process | |
| CN105294891A (en) | Method for performing steam stripping on residual VCM in PVC production | |
| CN105214581A (en) | The method of tail gas full-closed circulating recovery is polymerized in Production of PVC | |
| CN207811625U (en) | A kind of NMP Mead-Bauer recovery systems | |
| CN104629082A (en) | Method for recovering and refining solvent and monomer in industrial production of rare earth isoprene rubber | |
| CN110066213A (en) | Vinyl chloride monomer recovery process in Production of PVC | |
| CN205109056U (en) | Sour vapor removal recovery unit of red fuming nitric acid (RFNA) production | |
| CN101050183A (en) | New type production system for methylamine, and new technique for producing methylamine by using the system | |
| CN202808525U (en) | System for stilling ammonia by decompressing and adding alkali | |
| CN202478767U (en) | Vinyl chloride dehydration device | |
| CN202730054U (en) | Caprolactam monomer recovery system for high-volume production of polyamide slice | |
| CN109650646B (en) | Treatment method of glycine production wastewater | |
| CN109701363A (en) | A method of methanol in recycling low temperature washing device for methanol sour gas | |
| CN210134039U (en) | Battery grade dimethyl carbonate refining plant | |
| CN114262627A (en) | Carbide slag slurry acetylene recovery method and device | |
| CN204234103U (en) | A kind of catalyst feed reclaimer for the production of o-phenyl phenol | |
| CN202626078U (en) | Nitrile rubber monomer recycling device | |
| CN101590363B (en) | Method of tail gas alkaline cleaning in a polymerization stripping tower in polyvinyl chloride (PVC) resin production | |
| CN208378757U (en) | Device for continous way recycling triethylamine | |
| CN101440102B (en) | Method for processing methyl monomer synthesized washing slurry | |
| CN110002643A (en) | A kind of black foul sewage water treatment technology in river |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111214 |