SU301927A1 - METHOD OF OBTAINING POLYETHYLENE - Google Patents
METHOD OF OBTAINING POLYETHYLENEInfo
- Publication number
- SU301927A1 SU301927A1 SU1370541A SU1370541A SU301927A1 SU 301927 A1 SU301927 A1 SU 301927A1 SU 1370541 A SU1370541 A SU 1370541A SU 1370541 A SU1370541 A SU 1370541A SU 301927 A1 SU301927 A1 SU 301927A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- temperature
- obtaining polyethylene
- reactor
- reaction
- coil
- Prior art date
Links
- -1 POLYETHYLENE Polymers 0.000 title description 2
- 239000004698 Polyethylene (PE) Substances 0.000 title description 2
- 229920000573 polyethylene Polymers 0.000 title description 2
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000005977 Ethylene Substances 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000379 polymerizing Effects 0.000 description 1
- 230000014616 translation Effects 0.000 description 1
Description
Известен способ получени полиэтилена полимеризацией этилена по методу высокого давлени в трубчатых реакторах, например, при давлени х от 1000 до свыше 4000 атлг и при температурах от 100 до свыше 300°С с добавлением небольших количеств кислорода в качестве катализатора.A known method for producing polyethylene by polymerizing ethylene by the method of high pressure in tubular reactors, for example, at pressures from 1000 to over 4000 atg and at temperatures from 100 to over 300 ° C with the addition of small amounts of oxygen as a catalyst.
Однако осуществление реакции в трубчатых реакторах имеет определенные недостатки, так как сильно экзотермическа реакци происходит в относительно узко ограниченном пространстве и отвод теплоты реакции благодар большой толщине стенки примен емых трубопроводов высокого давлени труден.However, carrying out the reaction in tubular reactors has certain drawbacks, since a highly exothermic reaction takes place in a relatively narrow space and the removal of the heat of reaction due to the large wall thickness of the used high-pressure pipelines is difficult.
Следовательно, в таких реакторах легко может образоватьс ограниченна зона или даже несколько зон, в которых температура реакции поднимаетс недопустимо высоко, что может привести к образованию обесцвеченных продуктов или даже к взрыву.Consequently, in such reactors a limited zone or even several zones can easily form in which the reaction temperature rises unacceptably high, which can lead to the formation of discolored products or even an explosion.
Согласно изобретению было найдено, что можно устранить по вление зон со слишком высокой температурой и достичь равномерного режима давлени и температурного режима , если часть реакционной массы по крайней мере из одной зоны с более низкой температурой полимеризации переводить по крайней мере в одну зону с более высокой температурой полимеризации.According to the invention, it was found that it is possible to eliminate the appearance of zones with too high a temperature and to achieve a uniform pressure regime and a temperature regime, if part of the reaction mass from at least one zone with a lower polymerization temperature is transferred to at least one zone with a higher temperature. polymerization.
Такие переводы могут осуществл тьс в реакторе в виде сообщающейс трубчатой системы .Such translations can be carried out in the reactor as a communicating tubular system.
Подача всего полимеризуемого количества этилена происходит только в одном месте реактора , выравнивание температуры вызываетс отводами трубопроводов внутри трубчатой системы.The supply of the entire polymerized amount of ethylene takes place only in one place of the reactor, the temperature equalization is caused by the pipe outlets inside the tubular system.
Дл по снени технической реализации изобретени на чертеже показана така трубчата система.In order to clarify the technical implementation of the invention, the drawing shows such a tubular system.
Проточный змеевик / реактора имеет диаметр 40 мм. В направлении стрелки подаетс все поступающее па полимеризацию количество этилена вместе с компонентами катализатора .The flow coil / reactor has a diameter of 40 mm. In the direction of the arrow, the entire quantity of ethylene supplied to the polymerization is fed along with the catalyst components.
В первой трети змеевика расположены отводы 2-4, которые после обхода одного или нескольких витков змеевика реактора в более отдаленных точках 5-7 снова впадают в основной трубопровод.In the first third of the coil, taps 2–4 are located, which, after bypassing one or several turns of the reactor coil at more distant points 5–7, again flow into the main pipeline.
Эти отводы включаютс таким образом, что отбираютс отдельные потоки с различной температурой, например 80°С в первом трубопроводе и 100-120°С в остальных трубопроводах .These taps are turned on in such a way that separate streams with different temperatures are selected, for example 80 ° C in the first pipeline and 100-120 ° C in the other pipelines.
Publications (1)
Publication Number | Publication Date |
---|---|
SU301927A1 true SU301927A1 (en) |
Family
ID=
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4206302A (en) * | 1977-03-30 | 1980-06-03 | Societe Nationole des Poudres et Explosifs | Continuous process for the nitration of cellulose and apparatus therefor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4206302A (en) * | 1977-03-30 | 1980-06-03 | Societe Nationole des Poudres et Explosifs | Continuous process for the nitration of cellulose and apparatus therefor |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1054050B1 (en) | Method for providing a tube having carbon monoxide inhibiting properties when used for the thermal cracking of hydrocarbons | |
US10894840B2 (en) | Unified cooling for multiple polyolefin polymerization reactors | |
JP2022068155A (en) | Ethylene-based polymers formed by high pressure free radical polymerizations | |
RU2748690C9 (en) | Production unit for ethylene polymerization at high pressure and emergency stop method | |
SU301927A1 (en) | METHOD OF OBTAINING POLYETHYLENE | |
MX2014009414A (en) | High-pressure radical ethylene polymerization process in which ethylene is polymerized with a specific polyunsaturated olefin grade. | |
US3405115A (en) | Liquid catalyst injection | |
CA2861458C (en) | High-pressure radical ethylene co-polymerization process with a reduced temperature of the reaction mixture prior to introduction into the reaction zone | |
US8618227B2 (en) | Process for improving the devolatilization of polymer slurry produced in a polymerization reactor | |
RU2733850C1 (en) | Method of producing ethylene homopolymers or copolymers | |
CN110770259B (en) | High pressure free radical polymerization for producing ethylene-based polymers | |
US4087602A (en) | Multi-stage isolation of high pressure polyethylene | |
EA009423B1 (en) | Polyolefin production using high olefin concentration | |
US3207771A (en) | Production of aluminum alkyl compounds | |
RU2711227C1 (en) | Method of producing terpolymers of ethylene with vinyl acetate and butyl acrylate | |
US3503949A (en) | Process for polymerizing gaseous ethylene utilizing a constant diameter reactor with varying surface area/volume ratio | |
US3119804A (en) | Process for polymerizing ethylene in the presence of about 0.25 percent butane | |
CA3120954C (en) | A separating device and process for separating volatile compounds from a polymer reaction mixture | |
RU2598438C1 (en) | Method of purifying recirculating flow of ethylene with vinyl acetate from low-molecular copolymer, oils and other organic impurities | |
RU2146684C1 (en) | Method for production of ethylene-vinyl acetate copolymers | |
Palazzi et al. | Modelling approach to the evaluation of explosion limits of ethylene-air mixtures at flowing conditions for industrial process optimisation | |
US7528222B1 (en) | Olefin polymerization process | |
CS196677B1 (en) | Device for vinyl acetate production | |
WO2022236228A1 (en) | Multiple-stage heating for a flashline heater | |
SU803961A1 (en) | Plant for producing polyethylene |