WO2015047040A1 - 염화비닐 수지의 괴상중합용 장치 및 염화비닐 수지의 괴상중합 방법 - Google Patents
염화비닐 수지의 괴상중합용 장치 및 염화비닐 수지의 괴상중합 방법 Download PDFInfo
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- WO2015047040A1 WO2015047040A1 PCT/KR2014/009223 KR2014009223W WO2015047040A1 WO 2015047040 A1 WO2015047040 A1 WO 2015047040A1 KR 2014009223 W KR2014009223 W KR 2014009223W WO 2015047040 A1 WO2015047040 A1 WO 2015047040A1
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- monomer
- vinyl chloride
- chloride resin
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- bulk polymerization
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F14/00—Homopolymers and 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 a halogen
- C08F14/02—Monomers containing chlorine
- C08F14/04—Monomers containing two carbon atoms
- C08F14/06—Vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/01—Processes of polymerisation characterised by special features of the polymerisation apparatus used
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1862—Stationary reactors having moving elements inside placed in series
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F114/00—Homopolymers 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 a halogen
- C08F114/02—Monomers containing chlorine
- C08F114/04—Monomers containing two carbon atoms
- C08F114/06—Vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/02—Polymerisation in bulk
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00162—Controlling or regulating processes controlling the pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/24—Stationary reactors without moving elements inside
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2400/00—Characteristics for processes of polymerization
Definitions
- the present invention relates to a bulk polymerization apparatus of vinyl chloride resin and a bulk polymerization method of vinyl chloride resin, and more particularly, as the polymerization progresses, the average distance between the resin particles is shortened, resulting in excessive aggregation or friction between particles. It solves the problem that microparticles are generated, and it is possible to eliminate abnormal products (fine product, oversize product, lump product due to aggregation) and vinyl chloride resin with poor spherical formation.
- An apparatus for bulk polymerization of vinyl chloride resin and a method of bulk polymerization of vinyl chloride resin which can suppress and improve the quality and processability of vinyl chloride resin.
- Vinyl chloride resins are also referred to as polyvinyl chloride or PVC. Since it softens at 150-170 degreeC, it is a thermoplastic resin which is easy to process. It is used for lining of plates, pumps, tanks, plating baths and treatment tanks because of its high water resistance, chemical resistance and oil resistance. Mixing a large amount (40 to 80%) of the plasticizer is soft, so it is used for sheets, cotton, films, tiles and the like.
- the production method of vinyl chloride resin using mass polymerization unlike suspension polymerization or emulsion polymerization, does not use a heat medium such as water and does not use vinyl chloride monomer (VCM) and There is an advantage that the vinyl chloride resin can be obtained without supplying the initiator and the reaction additive as needed, polymerizing, and drying the reaction after the reaction.
- the bulk polymerization has an advantage that the apparatus is simple, the reaction is fast, the yield is high, the polymer of high purity can be obtained, and the polymer can be handled as it is.
- the heat generation of the polymerization system is strong, so that temperature control is difficult, the molecular weight distribution of the polymer is wide, and precipitation thereof is not easy. Therefore, in the bulk polymerization, it is very important to maintain the heat removal stability because there is no heat medium for heat removal.
- the amount of vinyl chloride monomer decreases, and the amount of vinyl chloride resin increases. Therefore, in the initial stage of the reaction, all of the produced vinyl chloride resin may remain surrounded by the vinyl chloride monomer.
- the amount of vinyl resin increases and the amount of vinyl chloride monomer decreases so that the solid vinyl chloride resin cannot remain enclosed in liquid, i.e., the liquid vinyl chloride monomer, thereby reducing the fluidity of the vinyl chloride resin, and reducing the vinyl chloride resin particles. Due to the shorter average distance between the particles, there was a problem in that fine particles were generated by excessive aggregation or friction between particles.
- the technology to date has mainly focused on collecting fine particles by installing a separate particle separator after the reaction in order to reduce the fine particle content.
- a screening method generally used to remove fine particles has a problem in that a sieve is easily blocked due to the electrostatic properties of the bulk polymerized particles.
- a dust collecting method using air flow is developed as a supplement to US Patent No. 4,963,634. It became.
- this technique is not only a costly solution, but also a poor solution because the use of the collected microparticles is not suitable.
- the fine particles contained in the vinyl chloride resin are suspended in the air during work and irritate the skin and respiratory organs of the worker, and have a detrimental effect.
- the particles are melted faster than other particles and subjected to continuous heat, they are carbonized. This results in poor appearance and whiteness of the molded surface.
- the carbonized particles act as defects in the molding and act as a starting point or diffusion point of a crack when impact is transmitted, the fine particle reduction technology is very low. It is important.
- the present invention is to polymerize by additional supply of monomer into the reaction system during the bulk polymerization, especially when the conversion of the monomer to the polymer within the range of 30 to 70% in order to solve the above conventional problems.
- the average distance between the resin particles is shortened to solve the problem in which fine particles are generated due to excessive agglomeration or friction between particles. Therefore, abnormal products (microparticle products, large particle products, agglomerated products due to agglomeration), and It aims at suppressing generation
- the monomer and initiator in the reactor Further during the polymerization of the monomer further comprises an additional feed pipe for supplying the monomer into the reactor.
- the reactor may further include at least one raw material supply pipe and a condenser.
- the reactor may further include an exhaust pipe.
- the exhaust pipe may further include a pressure control valve.
- the additional supply pipe may be connected to the bottom of the reactor.
- the apparatus for bulk polymerization of the vinyl chloride resin further includes a prepolymerization reactor, and the reactor is a raw material for fluidly connecting the reactor and the prepolymerization reactor so that the seed polymer generated in the prepolymerization reactor is introduced.
- the feed pipe and the raw material supply pipe for supplying the monomer and the post-polymerization initiator may be further included.
- the monomer is additionally supplied into the reactor including the monomer and the initiator, and the conversion rate of the monomer into the polymer is 30 to 70%.
- the addition is made to include a further monomer supply step of feeding into the reactor.
- the additionally supplied monomer may be supplied to the bottom of the reactor.
- Further supply of the monomer in the additional monomer supply step may consist of continuously supplying the monomer into the reactor.
- the amount of the monomer supplied in the additional monomer supply step may be in the range of 10% to 30% per hour of the amount of conversion of the monomer into the polymer.
- the monomer discharging step may be further performed simultaneously with or after the monomer additional feeding step.
- Emission of the monomer in the monomer discharge step may be an amount within the range of 80% to 100% of the supply amount of the monomer in the monomer additional supply step.
- the discharge of the monomer in the monomer discharge step may be through a condenser or exhaust pipe or both the condenser and the exhaust pipe.
- the average distance between the resin particles is shortened to solve the problem in which fine particles occur due to excessive agglomeration or interparticle friction between particles.
- the effect of reducing the occurrence of abnormal products (microparticle products, over-particle products, agglomerated products due to aggregation, etc.) and providing a vinyl chloride resin having a normal particle size distribution within the range of 75 to 200 ⁇ m There is.
- FIG. 2 is a schematic view showing another specific example of the apparatus for bulk polymerization of vinyl chloride resin according to the present invention.
- reaction space 13 axis of rotation
- reaction space 23 rotation axis
- the apparatus for bulk polymerization of vinyl chloride resin 20 is a reactor for bulk polymerization of vinyl chloride resin including a reaction tank for bulk polymerization, wherein the reactor including a monomer and an initiator. And an additional supply pipe 31 for additionally supplying the monomer into the reactor 21 during the polymerization of the monomer in (21).
- the additional supply pipe 31 is fluidly connected to a monomer source (not shown), and functions to supply monomer into the reactor 21.
- the reactor 21 may further include at least one raw material supply pipe 27 and the condenser (C).
- the raw material supply pipe 27 may be at least one, preferably two to five, more preferably three.
- Raw materials necessary for the polymerization reaction that is, monomers, initiators and reaction additives may be supplied into the reactor 21 through the raw material supply pipe 27.
- the condenser (C) functions to liquefy raw materials such as monomers volatilized into the gas phase and return to the reaction tank 21 or recover the liquefied raw materials. In the present invention, by recovering the monomer liquefied in the condenser (C) without returning to the reaction tank 21 to function to control the amount of the monomer additionally introduced into the reaction tank (21).
- the reactor 21 is a container having an inner space, and the inner space serves as the reaction space 22, and monomers and initiators may be introduced into the reaction space 22 to perform a polymerization reaction.
- the reactor 21 further includes a stirrer, which can be understood by those skilled in the art as long as the stirrer has a configuration capable of stirring the reactants in the reaction space 22.
- a stirrer shown by way of example in Figure 1 is a screw stirrer 24, the screw stirrer 24 is fixed to the rotary shaft 23 is rotated at the same time by the rotation of the rotary shaft 23 reactant in the reaction space 22 Stir them.
- the rotary shaft 23 extends to the outside of the reactor 21, the motor (M) is connected to the outer end (that is, the end located outside the reactor relative to the reactor), the rotation of the motor (M) By rotating simultaneously.
- a governor and / or a transmission may be connected between the motor M and the rotation shaft 23 as necessary.
- a scraper 25 may be further connected to an inner end of the rotating shaft 23 to which the screw stirrer 24 is connected (ie, an end located inside the reaction tank based on the reaction tank).
- the scraper 25 is installed to be in contact with the bottom of the reactor 21 or adjacent to the bottom of the reactor 21 to scrape material deposited or deposited on the bottom of the reactor 21.
- the reactor 21 may further include an exhaust pipe 28.
- the exhaust pipe 28 is fluidly connected to the reactor 21 so as to discharge gaseous substances to be discharged from the reactor 21. This causes the air to be discharged when the inside of the reactor 21 is purged with air or nitrogen, or the pressure inside the reactor 21 is supplied when the reactants such as monomers and the initiator are supplied into the reactor 21. It serves to regulate or discharge the gaseous material to be released during or after the reaction.
- the exhaust pipe 28 may further include a pressure control valve (R).
- the reaction tank is discharged from the reactor 21 by discharging a part of the gaseous monomer vaporized in the reactor 21 by appropriately opening the pressure regulating valve R provided in the exhaust pipe 28. And (21) to control the amount of monomer added further into.
- the pressure control valve (R) is configured to interrupt the flow of gaseous material by intermittent the exhaust pipe 28, thereby blocking (stage) the flow of gas through the exhaust pipe 28 to the reaction tank (21) It functions to lower the pressure in the reactor 21 by increasing the pressure inside or continually (continuously) the flow of gas.
- the exhaust pipe 28 may be further connected to a flow meter or a pressure gauge.
- a mass flow controller (MFC) may be connected to the exhaust pipe 28, and it is understood that such a flow controller is known to be purchased and used commercially by leading domestic and foreign manufacturers. It can be.
- the additional supply pipe 31 may be connected to the lower end of the reaction tank 21, and by this configuration, in particular, the additional supply pipe 31 may be added to the lower end of the reaction tank 21 in which a vinyl chloride resin having a relatively high specific gravity may be accumulated. It is possible to supply more monomers of so as to more efficiently reduce the overheating of the vinyl chloride resin mainly located in this portion and the collision between the resin particles.
- a temperature control jacket 26, such as a water jacket, may be further mounted to the outside of the reactor 21, and the heat regulation jacket may be heated or cooled through the inside thereof. By circulating water or oil, it is possible to adjust the temperature of the reactor 21, in particular the internal temperature of the reactor 21, in accordance with the temperature of the heated or cooled heating medium.
- a discharge pipe (D) is fluidly connected to the lower end of the reactor 21, through the discharge pipe (D) the reaction products, that is, polymerized resin products, other unreacted monomers and initiators, such as reactants from the reactor 21 It is configured to be discharged and recovered.
- the apparatus for bulk polymerization of vinyl chloride resin 20 may further include a prepolymerization device 10, and the prepolymerization device 10 further includes a prepolymerization reactor 11.
- the reactor 21 is a raw material supply pipe 27 for fluidly connecting between the reactor 21 and the prepolymerization reactor 11 so that the seed polymer generated in the prepolymerization reactor 11 is introduced.
- a raw material supply pipe 27 for supplying the monomer and the post polymerization initiator to the reaction tank 21.
- the seed polymer is also described as passing through the raw material supply pipe 27, and the monomer and postpolymerization initiator are described as unified through the raw material supply pipe 27, which is a monomer, a seed polymer or other initiators and reaction additives. It is based on the understanding as a raw material for the polymerization reaction, and the raw material supply pipes 27 are to be understood to function to supply these raw materials.
- the other configuration of the prepolymerization device 10 is the same or similar to the corresponding elements of the apparatus for bulk polymerization of the vinyl chloride resin 20 according to the present invention, except that only the reference numerals are the same or similar. It can be understood.
- the prepolymerization apparatus 10 includes a prepolymerization reactor 11, an inner space of the prepolymerization reactor 11 functions as a reaction space 12, and a rotation shaft 13 in the prepolymerization reactor 11. And a stirrer installed on the rotary shaft 13, that is, a screw stirrer 14 and a scraper 15.
- a heat regulating jacket 16 is installed outside the prepolymerization reactor 11, and at least one raw material supply pipe 17 and an exhaust pipe 18 for supplying reaction raw materials into the prepolymerization reactor 11.
- the rotary shaft 13 is connected to the motor (M) can be rotated by the motor (M), and the prepolymerization reactor (11) further condenser (C) and discharge pipe (D) Is connected, the exhaust pipe 18 may be further connected to the pressure control valve (R).
- the prepolymerization device 10 is shown as a reaction tank 11 equipped with a screw stirrer 14 and a scraper 15, but the present invention is not limited thereto. It will be appreciated that it is also possible to employ other reactors, such as reactors with turbine-type impellers attached.
- the prepolymerization reactor 11 of the prepolymerization apparatus 10 may be supplied with monomers, initiators and other reaction additives to perform polymerization under rapid stirring and high pressure to form seed polymers. It is known that the particle size distribution and physical properties of the produced particles are more favorable.
- the prepolymerization device 10 is not shown to further include an additional supply pipe, an additional supply pipe for additionally supplying monomers to the prepolymerization reactor 11 of the prepolymerization device 10 is It may be further included, preferably the additional supply pipe may be connected to the lower end of the prepolymerization reactor (11).
- the monomer is additionally supplied into the reactor including the monomer and the initiator, and the conversion rate of the monomer into the polymer is 30 to 70%.
- the monomer is characterized in that it comprises a monomer additional supply step for supplying further into the reactor.
- the conversion rate of the monomer into the polymer is determined by calculating the heat of polymerization generated by dividing the heat of polymerization generated by the heat of polyvinyl chloride by using a calorimeter, and the point of time when the conversion becomes 30% (this time point From the current fluctuation (amperage fluctuation) can be seen that the load of the agitator increases directly from the additional supply of monomer, and the conversion rate exceeds 70% (the pressure inside the reactor begins to drop gradually). To stop the further supply of monomers is the heart of the present invention.
- the monomer is additionally supplied when the conversion rate is less than 30%, there may be a problem that the fine particles increase, which is not preferable because of the increase in the level of the reactant, and the monomer is added after the conversion rate exceeds 70%.
- the polymerization time is longer and the recovery time of the unreacted monomer is longer.
- the additional monomer supply step as described above is carried out by additionally introducing monomer into the reactor through an additional feed tube in the apparatus for bulk polymerization of a vinyl chloride resin according to the present invention having the above-described configuration.
- the additionally supplied monomer may be supplied to the lower end of the reaction tank, whereby further monomer is supplied to the lower end of the reaction tank in which vinyl chloride resin having a higher specific gravity than the vinyl chloride monomer may accumulate. It is characterized in that it is possible to more efficiently reduce the overheating of the vinyl chloride resin mainly located in the part and the collision between the resin particles.
- the additional supply of the monomer in the additional monomer supply step may be made to continuously supply the monomer into the reactor, but the present invention is not limited thereto, it is to be understood that it is also possible to intermittently supply the monomer as needed. It can be.
- the amount of the monomer supplied in the additional monomer feed step is in an amount within the range of 10% to 30% per hour of the amount of conversion of the monomer into the polymer, more preferably 15% to 30%, most preferably 22% to 25%. It can be an amount within the range of% (injecting the monomer to about 80% of the reactor size used), preferably the monomer discharge step may be further carried out at the same time or subsequent to the additional monomer feed step, thereby The amount of monomers in the reactor can of course be properly adjusted to the amount of the total reactants.
- Emission of the monomer in the monomer discharge step may be an amount within the range of 80% to 100% of the supply amount of the monomer in the additional monomer supply step, whereby the additional monomer is supplied to the equilibrium of the entire reaction system
- the average distance between the resin particles is shortened to solve the problem in which fine particles are generated due to excessive agglomeration or friction between particles. , Excessive particle products, agglomerated products due to aggregation) and the formation of poor vinyl chloride resins.
- the discharge of the monomer in the monomer discharge step may be through a condenser or exhaust pipe or both the condenser and the exhaust pipe.
- the condenser functions to liquefy raw materials such as monomers volatilized into the gas phase and return them to the reaction tank or recover the liquefied raw materials.
- the exhaust pipe can adjust the amount of the monomer additionally introduced into the reactor by discharging a portion of the gaseous monomer vaporized in the reactor from the reactor by appropriately opening the pressure control valve installed in the exhaust pipe. Function.
- the polymerization reaction in the reactor 21 of the bulk polymerization apparatus 20 of the vinyl chloride resin according to the present invention may be carried out, for example, under a pressure of 8 to 10 K / G, and thus, as described above. Further addition of the monomer may be carried out at a pressure slightly higher than the pressure of the reaction conditions, for example, a pressure of 8.1 to 12 K / G, but the present invention is not limited thereto.
- the prepolymerization reaction tank 11 of the prepolymerization device 10 is also the same pressure as in the polymerization reaction in the reaction tank 21 of the bulk polymerization apparatus 20 of the vinyl chloride resin, for example, 8 to 8 Can be carried out under a pressure of 10 K / G.
- the present invention mainly describes the use of vinyl chloride monomers for the production of vinyl chloride resins, it can be understood by those skilled in the art that the present invention can be applied to polymerization of other vinyl monomers. It will be understood that it is not limited to the polymerization of vinyl chloride monomers as will be appreciated.
- 0.1 part by weight of 1,1,3,3-tetramethylbutylperoxy neodicarbonate (OND) was added as an initiator, polymerized at a pressure of 7.1 K / G for 40 minutes, and then at 8.0 K / G.
- the mixture was boosted and polymerized for 140 minutes.
- an additional amount of vinyl chloride monomer was added at 15 parts per hour at a conversion rate of 30% when the internal temperature of the reactor began to decrease, and the addition of such monomers resulted in 70% conversion.
- the pressure was continued until a pressure drop occurred.
- the reaction was carried out in the same manner as in Example 1 except that the vinyl chloride monomer was added in an amount of 10 parts by weight instead of 5 parts by weight at a conversion rate of 30% when the internal temperature of the reactor started to decrease.
- Example 2 The reaction was carried out in the same manner as in Example 1 except that no additional vinyl chloride monomer was added at a conversion rate of 30% when the internal temperature of the reactor began to decrease.
- Example 1 conversion rate: 30-70%) (5% of the initial dose continuously added)
- Example 2 conversion rate: 30 to 70% (15% continuously input compared to the initial input amount)
- Example 3 conversion rate: 30 to 70% (10% continuously added to the initial input amount) Comparative example Particle size ( ⁇ m) 168 170 165 160 Below 70 ⁇ m (%) 1.60 1.6 1.8 2.6 Below 20 ⁇ m (%) 0.7 0.7 0.65 1.10 Lump (%) 1.7 1.8 2 3
- the average distance between the resin particles is shortened to solve the problem in which fine particles are generated due to excessive agglomeration or interparticle friction between particles. Therefore, abnormal products (microparticle products, over-particle products, agglomeration products by agglomeration) Etc.) and it was confirmed that the generation of poor vinyl chloride resin can be suppressed and the quality and processability of the vinyl chloride resin can be improved.
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Abstract
Description
실시예 1(전환율:30~70%)(초기 투입양 대비 5%를 연속적으로 투입) | 실시예 2(전환율:30~70%)(초기 투입양 대비 15%를 연속적으로 투입) | 실시예 3(전환율:30~70%)(초기 투입양 대비 10%를 연속적으로 투입) | 비교예 | |
입경(㎛) | 168 | 170 | 165 | 160 |
Below 70㎛(%) | 1.60 | 1.6 | 1.8 | 2.6 |
Below 20㎛ (%) | 0.7 | 0.7 | 0.65 | 1.10 |
Lump (%) | 1.7 | 1.8 | 2 | 3 |
Claims (13)
- 괴상중합을 위한 반응조를 포함하는 염화비닐 수지의 괴상중합용 장치에 있어서,단량체와 개시제를 포함하는 상기 반응조 내에서의 상기 단량체의 중합 도중에 상기 반응조 내로 단량체를 추가로 공급하기 위한 추가공급관을 더 포함하여 이루어짐을 특징으로 하는 염화비닐 수지의 괴상중합용 장치.
- 제 1 항에 있어서,상기 반응조가 적어도 하나 이상의 원료공급관 및 응축기를 더 포함하는 것을 특징으로 하는 상기 염화비닐 수지의 괴상중합용 장치.
- 제 1 항에 있어서,상기 반응조가 배기관을 더 포함하는 것을 특징으로 하는 상기 염화비닐 수지의 괴상중합용 장치.
- 제 3 항에 있어서,상기 배기관이 압력조절밸브를 더 포함하는 것을 특징으로 하는 상기 염화비닐 수지의 괴상중합용 장치.
- 제 1 항에 있어서,상기 추가공급관이 상기 반응조의 하단에 연결되는 것을 특징으로 하는 상기 염화비닐 수지의 괴상중합용 장치.
- 제 1 항에 있어서,상기 염화비닐 수지의 괴상중합용 장치가 전중합 반응조를 더 포함하여 이루어지며, 상기 반응조가 상기 전중합 반응조에서 생성되는 시드 폴리머가 유입되도록 상기 반응조와 상기 전중합 반응조 사이를 유체적으로 연결하는 원료공급관 및 단량체와 후중합 개시제를 상기 반응조로 공급하기 위한 원료공급관을 더 포함하는 것을 특징으로 하는 상기 염화비닐 수지의 괴상중합용 장치.
- 단량체 및 개시제를 포함하는 반응조 내로 단량체를 추가 공급하되, 상기 단량체의 중합체로의 전환율이 30 내지 70%인 때에 상기 반응조 내로 추가로 공급하는 단량체추가공급단계를 포함하여 이루어짐을 특징으로 하는 염화비닐 수지의 괴상중합 방법.
- 제 7 항에 있어서,상기 추가로 공급되는 상기 단량체가 상기 반응조의 하단으로 공급되는 것을 특징으로 하는 상기 염화비닐 수지의 괴상중합 방법.
- 제 7 항에 있어서,상기 단량체추가공급단계에서 상기 단량체의 추가공급이 단량체를 반응조 내로 연속적으로 공급하는 것으로 이루어짐을 특징으로 하는 상기 염화비닐 수지의 괴상중합 방법.
- 제 7 항에 있어서,상기 단량체추가공급단계에서의 상기 단량체의 공급량이 상기 단량체의 중합체로의 전환량의 30 내지 70%의 범위에서 0.1 내지 10배량의 범위 이내의 양임을 특징으로 하는 상기 염화비닐 수지의 괴상중합 방법.
- 제 7 항에 있어서,상기 단량체추가공급단계와 동시에 또는 후속하여 단량체배출단계가 더 수행되는 것을 특징으로 하는 상기 염화비닐 수지의 괴상중합 방법.
- 제 11 항에 있어서,상기 단량체배출단계에서의 단량체의 배출량이 상기 단량체추가공급단계에서의 단량체의 공급량의 0.1 내지 10배량의 범위 이내의 양임을 특징으로 하는 상기 염화비닐 수지의 괴상중합 방법.
- 제 11 항에 있어서,상기 단량체배출단계에서의 단량체의 배출이 응축기 또는 배기관 또는 응축기와 배기관 둘 다를 통하여 이루어짐을 특징으로 하는 상기 염화비닐 수지의 괴상중합 방법.
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CN201480024295.4A CN105164165B (zh) | 2013-09-30 | 2014-09-30 | 用于氯乙烯树脂本体聚合反应的装置以及氯乙烯树脂本体聚合反应的方法 |
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CN111298751B (zh) * | 2020-04-08 | 2021-09-10 | 哈尔滨强石新材料技术开发股份有限公司 | 一种聚羧酸减水剂加工系统 |
KR20220041739A (ko) | 2020-09-25 | 2022-04-01 | 주식회사 엘지화학 | 염화비닐계 중합체의 제조방법 |
US20230022810A1 (en) | 2020-09-25 | 2023-01-26 | Lg Chem, Ltd. | Method for preparing vinyl chloride-based polymer |
US20240253007A1 (en) * | 2021-08-12 | 2024-08-01 | Lg Chem, Ltd. | Polymerization Reaction Device for High Viscosity Resin |
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US20160038910A1 (en) | 2016-02-11 |
KR20150037420A (ko) | 2015-04-08 |
CN105164165B (zh) | 2017-05-03 |
KR101684726B1 (ko) | 2016-12-20 |
CN105164165A (zh) | 2015-12-16 |
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