SU350798A1 - METHOD OF OBTAINING VINYL CHLORIDE COPOLYMERS - Google Patents
METHOD OF OBTAINING VINYL CHLORIDE COPOLYMERSInfo
- Publication number
- SU350798A1 SU350798A1 SU1440735A SU1440735A SU350798A1 SU 350798 A1 SU350798 A1 SU 350798A1 SU 1440735 A SU1440735 A SU 1440735A SU 1440735 A SU1440735 A SU 1440735A SU 350798 A1 SU350798 A1 SU 350798A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- vinyl chloride
- cascade
- copolymers
- reaction mixture
- chloride copolymers
- Prior art date
Links
- 229920001577 copolymer Polymers 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims description 15
- BZHJMEDXRYGGRV-UHFFFAOYSA-N vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 11
- 239000011541 reaction mixture Substances 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000977 initiatory Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000001105 regulatory Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229920000126 Latex Polymers 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Description
Известен способ получени сополимеров винилхлорида с другими винильными соединени ми путем непрерывной водно-эмульсионио; со олимеризации указанных мономеров в присутствии инициирующих и регулирующих добавок в каскаде аппаратов полного смещени при непрерывной дозировке, более активного мономера по ходу реакции.A known method of producing copolymers of vinyl chloride with other vinyl compounds by means of continuous water emulsion; with olimerization of the indicated monomers in the presence of initiating and regulating additives in the cascade of full-displacement apparatus with a continuous dosage of the more active monomer in the course of the reaction.
Предлагаемый способ отличаетс от известного тем, что процесс осуществл ют нри одинаковом во всем каскаде аппаратов давлении и определенной в каждом аппарате температуре реакционной смеси, обеспечивающей испарение избытка вииилхлорида из второго и последуюпдих аппаратов.The proposed method differs from the known one in that the process is carried out at the same pressure throughout the apparatus cascade and the temperature of the reaction mixture determined in each apparatus, which ensures the evaporation of excess vinyl chloride from the second and subsequent apparatus.
С целью осуществлени наиболее полпой рециркул ции непрореагировавшего виннлхлорида в пределах рабочего объема каскада в последнем аппарате поддерживают иовышеиную температуру, соответствующую минимальному содержанию вииилхлорида в реакционной смеси. Винилхлорид, испар ющийс , например , из третьего аппарата, и.меющего температуру выше, чем во втором н иервом, конденсируетс в них и тем самым поддерживаетс посто нна концентраци во всех аппаратах и процесс осуществл етс без внешней рециркул ции вииил.члорида (ВХ). Практически содержание виннлхлорида в готовом латексе можно свести к минимуму до 2-5%.In order to carry out the most complete recirculation of unreacted vinnl chloride within the working volume of the cascade in the latter apparatus, the higher temperature corresponding to the minimum content of vinyl chloride in the reaction mixture is maintained. Vinyl chloride, evaporating, for example, from a third apparatus, and having a temperature higher than that of the second nanometer, condenses into them and thereby maintains a constant concentration in all apparatus and the process is carried out without external recirculation of vinyl chloride (VC) . Practically, the content of vinnl chloride in the finished latex can be minimized to 2-5%.
Процесс сонолимеризации ВХ и акрилонитрила с целью получени волокнообразующего сополимера, состо щего из 40% акрнлоиитрила и 60% ВХ осуществл етс в водной эмульсии ииициатор-окислительно-восстановительна система: персульфатмегабисульфит с раздельио подаче компонентов. Температура реакции 20-40° С. Скорость дозировки соответствует расчетиому времени пребывани . В последней секции температура 40°С дл более полиого удалени ВХ.The process of sonolimerization of VC and acrylonitrile to produce a fiber-forming copolymer consisting of 40% acrnloyitrile and 60% VC is carried out in an aqueous emulsion initiator-redox system: persulfate megabisulfite with separate separation of the components. The reaction temperature is 20-40 ° C. The dosage rate corresponds to the estimated residence time. In the last section, the temperature is 40 ° C for more complete removal of BX.
В таблице привод тс результаты экспериментов , из которых видно, что сополимер иа всем прот жении нроцесса имеет стабильный н гомогенный состав (иослодшп рассчитывалс но анализу иа хлор), а также стсиень конверсии , определ ема по сухому остатку. Эти результаты вл ютс иодтверждением того, что в реакциоиной системе поддерживаетс посто нна концентраци мономеров, а следовательно , предлагаемый способ позвол ет управл ть процессом.The table lists the results of experiments, from which it is clear that the copolymer, throughout the entire process, has a stable and homogeneous composition (and was calculated by analyzing chlorine), as well as the conversion rate determined by the dry residue. These results are an indication that a constant concentration of monomers is maintained in the reaction system, and therefore the proposed method allows to control the process.
Предмет изобретени Subject invention
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU350798A1 true SU350798A1 (en) |
Family
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456735A (en) * | 1981-08-17 | 1984-06-26 | Hoechst Aktiengesellschaft | Continuous process for the production of vinyl chloride polymers in aqueous suspension |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456735A (en) * | 1981-08-17 | 1984-06-26 | Hoechst Aktiengesellschaft | Continuous process for the production of vinyl chloride polymers in aqueous suspension |
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