CN100341905C - Polymerization reactor for producing suspension type polyvinyl-chloride - Google Patents
Polymerization reactor for producing suspension type polyvinyl-chloride Download PDFInfo
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- CN100341905C CN100341905C CNB200510031087XA CN200510031087A CN100341905C CN 100341905 C CN100341905 C CN 100341905C CN B200510031087X A CNB200510031087X A CN B200510031087XA CN 200510031087 A CN200510031087 A CN 200510031087A CN 100341905 C CN100341905 C CN 100341905C
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Abstract
The present invention discloses a producing method of suspension type polyvinyl chloride and a polymerizing reactor. The present invention adopts the combination of two internal cooling tubes with a stirring device, which can simultaneously generate radial flow and axial flow for achieving optimal shearing force and the number of cycles; the particle distribution of produced poly chloroethylene resin is most suitable for rear-processing production. Because the present invention totally improves the structure (including a stirring paddle and a buffer plate) of the reactor, the mix-dispersion performance of the system can be remarkably improved. Reaction materials are quickly and effectively dispersed, and particles distribution is uniform; because a partially non-uniform area disappears, the whole reaction space is effectively utilized; therefore, the production intensity of the reactor is improved, and material consumption and energy consumption are reduced. Therefore, the products are most suitable for rear-processing production.
Description
Technical field
The present invention relates to a kind of reactor of polyvinyl chloride, specifically, relating to vinylchlorid (VC) is monomer, with water is medium, under catalyst action, by suspension method, polymerization of vinyl choride monomer is become the reactor of polyvinyl chloride, particularly the whipping appts in the polymerization reactor and be arranged on baffle plate in the reactor.
Background technology
The reaction of the suspension polymerization of vinyl chloride monomer is a kind of complex reaction, and so-called suspension method PVC production is meant the vinyl chloride monomer (VCM) that is dissolved with initiator, is dispersed into droplet-like under the stirring action in water, and suspends in water and carry out polymerization.In water, be dissolved with dispersion agent, make VCM evenly and stably suspended dispersed and prevent polymkeric substance in the polymerization process in aqueous phase---the monomer particle is sticking also.
Water-fast monomer is in the same place with water, under stirring action, disperses through liquid liquid, and monomer is the droplet-like disperse phase, is suspended in the dispersion medium water.Drop can continue to be dispersed into small droplets under stirring action, also can become big drop by coalescence.To certain the time, disperse and the running balance of coalescence formation, mean drop diameter trend certain numerical value, the existence of dispersion agent will make the surface tension of system reduce, help the dispersion of drop, because dispersion agent has certain guarantor's glue function, also can prevent polymkeric substance under certain transformation efficiency simultaneously---the bonding of monomer particle.Drop is relevant with stirring intensity, dispersion agent combination etc. with the size of later polymer particle.
Suspension polymerization of VC is except the universal law of following suspension polymerization, the feature that also has precipitation polymerization, polyvinyl chloride resin particle can be transparent sphere, also can be the many folds of epidermis, the loose resin of inner porous, this is relevant with character with particle surface dispersion agent epithelium intensity.In polyvinyl chloride post-treatment process, often be furnished with softening agent, thermo-stabilizer and other multiple auxiliary agent.For the ease of the absorption of softening agent, the plasticizing of resin and the performance of improvement goods, each state all competitively develops the PVC new variety that meet the needs of.Except the selection and the compound use of dispersion agent becomes the main research topic, mix that to disperse influence to the polyvinyl chloride particles characteristic with liquid liquid be another main line in the suspension polymerization of VC reaction engineering, also be the main contents of the relevant patent in various countries.
Stirring action has influence on PVC particle grain size and size distribution, voidage and relevant nature thereof.In polymeric kettle, baffle plate is set, can change the mobility status of material.Practice and theoretical investigation all prove, admixture in the reactor will directly influence the efficient of polyreaction and the quality of product, for not isometric polymerization reactor, the whipping appts and the baffle plate that should have ad hoc structure design and a kind ofly can carry out the target that well-mixed suspension polymerization of VC reactor has become numerous scientist and pursued to reaction mass.
Domesticly introduced 127 meter 3 reactor of Japan from the end of the seventies in last century, and only made baffle plate with a upright flat board, the baffle plate coefficient is low, can't resolve the solid rotating part in when stirring.Rising the seventies also has 30 meters of independent development
3Still adopts 8 inner cool tubes to make baffle plate, helps conducting heat, but complex structure, the still inner member is too many, and clear still and stick resistant kettle technology application are brought difficulty.Once introduce 70 meters in the U.S. end of the eighties
3Still adopts 4 inner cool tubes, and still is too little first, and secondly, inner cool tube is also many, still is difficult to realize cleaning the requirement of still, and therefore, development research is a kind of can be applicable to 120～140 meters of volumes
3The suspension polymerization of VC reactor, be that branch of industry is extremely expected.
Summary of the invention
One of technical issues that need to address of the present invention are to disclose a kind of polymerization reactor of producing suspension type polyvinyl-chloride, are 120～140 meters to overcome the volume that can not be used for that prior art exists
3Suspension polymerization of VC reaction defective;
Two of the technical issues that need to address of the present invention provide a kind of production method of suspension type polyvinyl-chloride.
In order to make reactor can be applicable to that volume is 120～140 meters
3Suspension polymerization of VC, the present invention comprises that to the structure of traditional reactor whipping appts and baffle plate have carried out comprehensively optimizing and revising, this reactor comprises:
Top is provided with the round shape vertical pressure vessel that material inlet, bottom are provided with discharge port;
A whipping appts that axially is installed in the described pressurized vessel, the whipping appts that the present invention adopts comprises that one axially is installed in the stir shaft in the reactor and is arranged on three layers of oblique oar formula stirring rake on the stir shaft, and every layer of stirring rake is provided with three circular arcs and has the blade of angle α with stir shaft;
Be arranged on the outer outer cooling coil pipe of pressurized vessel;
Be vertically set in the pressurized vessel and leave two inner cool tubes of gap delta with reactor wall, its upper end is connected with the heat-eliminating medium inlet on pressurized vessel top, its lower end is connected with the heat-eliminating medium outlet of pressurized vessel bottom, described inner cool tube double as baffle plate, the diameter of this inner cool tube is 0.04～0.07 times of reactor inside diameter, and the present invention had both reduced systemic resistance with inner cool tube double as baffle plate, save energy consumption, simultaneously again can the enhancement of heat transfer effect.
The present invention adopts the combination of two inner cool tubes and said whipping appts, can produce radial flow and axial flow simultaneously.Will obtain best shearing force and cycle index, the polyvinyl chloride (PVC) RESINS of production, its size distribution be the production of suitable post-treatment.
Since across-the-board regulation of the present invention the structure of reactor, comprise stirring rake and baffle plate, the mixing-dispersing property of system significantly improves.Reaction mass disperses quickly and effectively, even particle distribution, because local inhomogeneous district disappears, the entire reaction space is used more effectively, and improves the production intensity of reactor, has reduced material consumption and energy consumption.
Description of drawings
Fig. 1 is the overall structure synoptic diagram of reactor of the present invention.
Fig. 2 is that A---A among Fig. 1 is to synoptic diagram.
Embodiment
See Fig. 1 and Fig. 2, polymerization reactor of the present invention comprises:
Top is provided with the round shape vertical pressure vessel 1 that material inlet 2, bottom are provided with discharge port 3, and the volume of round shape vertical pressure vessel 1 is 120～140 meter 3, and height with the ratio of internal diameter is: highly: internal diameter=10.4～0.6;
A whipping appts that axially is installed in the described pressurized vessel 1, the whipping appts that the present invention adopts comprises that one axially is installed in the stir shaft 4 in the reactor 1 and is arranged on three layers of oblique oar formula stirring rake on the stir shaft 4, and every layer of stirring rake is provided with three circular arcs and has the blade 5 of angle α with stir shaft 4; α=13～18 °, the radian measure gamma of blade 5 is 90～110, the width H of blade 5 is 400～600mm, the length L of blade 5 be reactor 1 internal diameter 0.4～0.6;
Be arranged on the outer outer cooling coil pipe 6 of pressurized vessel;
Be vertically set in the pressurized vessel and leave two inner cool tubes 7 of gap delta with reactor wall, its upper end is connected with the heat-eliminating medium inlet 8 on pressurized vessel 1 top, its lower end is connected with the heat-eliminating medium outlet 9 of pressurized vessel 1 bottom, described inner cool tube 7 double as baffle plates, the diameter of this inner cool tube 7 is 0.04～0.07 of a reactor inside diameter, gap delta be reactor 1 internal diameter 4.8～8.0%, the present invention is with inner cool tube double as baffle plate, both reduced systemic resistance, save energy consumption, simultaneously again can the enhancement of heat transfer effect;
Suspension type polyvinyl-chloride can be in above-mentioned reactor, in temperature of reaction is 50～65 ℃, reaction pressure is to carry out under the condition of 0.7～1.3MPa, with vinyl chloride monomer, dispersion agent, auxiliary agent, water and catalyzer etc. add reactor 1 from the material inlet 2 on reactor 1 top, and reaction product is drawn by exporting 3.Its concrete processing step and processing condition have had disclosed report in many patents and relevant document.Dispersion agent, auxiliary agent and catalyzer etc. also have report in many documents.
Adopt above-mentioned method suspension method to prepare polyvinyl chloride, because the appropriate design of whipping appts, the coupling between baffle plate and the whipping appts, coordination, mixing time is shortened, particle suspension, and what is more important, component distributes in the reactor, distributing mutually more meets the needs of reaction.In the production of 0.25～0.35 meter 3 the scale that is comparable to the industrial production condition, the present invention has obtained good result, prepared polyvinyl chloride its through the production of suitable post-treatment that distributes.
Claims (2)
1. a suspension method prepares the polymerization reactor of polyvinyl chloride, comprising:
Top is provided with the round shape vertical pressure vessel (1) that material inlet (2), bottom are provided with discharge port (3); A whipping appts that axially is installed in the described pressurized vessel (1) is arranged on the outer outer cooling coil pipe (6) of pressurized vessel: it is characterized in that:
Also comprise be vertically set in the pressurized vessel (1) and leave two inner cool tubes (7) of gap delta with reactor wall, its upper end is connected with the heat-eliminating medium inlet (8) on pressurized vessel top, the heat-eliminating medium outlet (9) of its lower end and pressurized vessel 1 bottom is connected, gap delta be reactor (1) internal diameter 4.8～8.0%;
Said whipping appts comprises that one axially is installed in the stir shaft (4) in the reactor (1) and is arranged on three layers of oblique oar formula stirring rake on the stir shaft (4), every layer of stirring rake is provided with three circular arcs and has the blade (5) of angle α with stir shaft (4), α=13～18 °;
The volume of round shape vertical pressure vessel (1) is 120～140 meters
3, height with the ratio of internal diameter is: highly: internal diameter=1: 0.4～0.6, the radian of blade (5) is 90～110, the width of blade (5) is 400～600mm, the length of blade (5) be reactor (1) internal diameter 0.4～0.6;
The diameter of inner cool tube (7) is 0.04～0.07 of a reactor inside diameter.
2. the production method of a suspension type polyvinyl-chloride, it is characterized in that: this method is included in the described reactor of claim 1, vinyl chloride monomer, dispersion agent, auxiliary agent, the polymerization procedure of water in the presence of catalyzer.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510031087XA CN100341905C (en) | 2005-10-25 | 2005-10-25 | Polymerization reactor for producing suspension type polyvinyl-chloride |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510031087XA CN100341905C (en) | 2005-10-25 | 2005-10-25 | Polymerization reactor for producing suspension type polyvinyl-chloride |
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| CN1757657A CN1757657A (en) | 2006-04-12 |
| CN100341905C true CN100341905C (en) | 2007-10-10 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102151536A (en) * | 2009-02-27 | 2011-08-17 | 山东爱地高分子材料有限公司 | High-strength, high-modulus and superhigh-molecular-weight polyethylene fiber reaction kettle |
| CN104028173B (en) * | 2014-05-28 | 2016-06-29 | 新疆中泰化学股份有限公司 | Polymeric kettle feeding device and using method thereof |
| CN106693873A (en) * | 2017-03-21 | 2017-05-24 | 北京化工大学 | Super-cavitation high-speed-stirred reactor |
| TWI751686B (en) * | 2019-09-10 | 2022-01-01 | 南韓商韓華思路信股份有限公司 | Agitator for batch suspension polymerization of vinyl chloride resin, and batch suspension polymerization method and batch suspension polymerization reactor using the same |
| CN115260674A (en) * | 2022-09-01 | 2022-11-01 | 盐城圣华塑胶科技有限公司 | A high wear-resistant, high-toughness, heat-resistant PVC plastic material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2075542U (en) * | 1990-09-20 | 1991-04-24 | 水利电力部西安电力树脂厂 | Suspension ploymeric reactor |
| JPH05337362A (en) * | 1992-06-10 | 1993-12-21 | Shinko Pantec Co Ltd | Reaction vessel |
| CN1314421A (en) * | 2000-03-21 | 2001-09-26 | 青岛海晶化工集团有限公司 | Medium size polymerizing still for suspension polymerizing vinyl chloride and relevant polymerization process |
| CN2630247Y (en) * | 2003-06-24 | 2004-08-04 | 中国科学院过程工程研究所 | Suspension polymerization apparatus |
| CN2680666Y (en) * | 2004-03-02 | 2005-02-23 | 锦西化工机械(集团)有限责任公司 | Large-scale aggregation still for vinyl chloride suspension polymerization |
-
2005
- 2005-10-25 CN CNB200510031087XA patent/CN100341905C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2075542U (en) * | 1990-09-20 | 1991-04-24 | 水利电力部西安电力树脂厂 | Suspension ploymeric reactor |
| JPH05337362A (en) * | 1992-06-10 | 1993-12-21 | Shinko Pantec Co Ltd | Reaction vessel |
| CN1314421A (en) * | 2000-03-21 | 2001-09-26 | 青岛海晶化工集团有限公司 | Medium size polymerizing still for suspension polymerizing vinyl chloride and relevant polymerization process |
| CN2630247Y (en) * | 2003-06-24 | 2004-08-04 | 中国科学院过程工程研究所 | Suspension polymerization apparatus |
| CN2680666Y (en) * | 2004-03-02 | 2005-02-23 | 锦西化工机械(集团)有限责任公司 | Large-scale aggregation still for vinyl chloride suspension polymerization |
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| CN1757657A (en) | 2006-04-12 |
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Owner name: SHANGHAICHLORINE AND ALKALI CHEMICAL CO LTD; APPL Free format text: FORMER OWNER: SHANGHAICHLORINE AND ALKALI CHEMICAL CO LTD Effective date: 20060728 |
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Effective date of registration: 20060728 Address after: 200241 No. 4747 Wu Long Road, Shanghai Applicant after: Shanghai Chlor-Alkali Chem. Co., Ltd. Co-applicant after: Shanghai Engineering Chemical Designing Inst. Co., Ltd. Address before: 200241 No. 4747 Wu Long Road, Shanghai Applicant before: Shanghai Chlor-Alkali Chem. Co., Ltd. |
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Address after: 200241 No. 4747 Wu Long Road, Shanghai Patentee after: Shanghai Chlor-Alkali Chem. Co., Ltd. Patentee after: SHANGHAI HUAYI ENGINEERING CO., LTD. Address before: 200241 No. 4747 Wu Long Road, Shanghai Patentee before: Shanghai Chlor-Alkali Chem. Co., Ltd. Patentee before: Shanghai Engineering Chemical Designing Inst. Co., Ltd. |