SU331813A1 - METHOD FOR PREPARATION OF CATALYST FOR POLYMERIZATION OF ETHYLENE - Google Patents
METHOD FOR PREPARATION OF CATALYST FOR POLYMERIZATION OF ETHYLENEInfo
- Publication number
- SU331813A1 SU331813A1 SU1451082A SU1451082A SU331813A1 SU 331813 A1 SU331813 A1 SU 331813A1 SU 1451082 A SU1451082 A SU 1451082A SU 1451082 A SU1451082 A SU 1451082A SU 331813 A1 SU331813 A1 SU 331813A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- catalyst
- polymerization
- ethylene
- preparation
- chromium
- Prior art date
Links
- 239000003054 catalyst Substances 0.000 title description 17
- 238000006116 polymerization reaction Methods 0.000 title description 8
- 239000005977 Ethylene Substances 0.000 title description 7
- VGGSQFUCUMXWEO-UHFFFAOYSA-N ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title description 7
- 230000004913 activation Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- PYKNDCILXQWMJP-UHFFFAOYSA-O [NH4+].[Cr+3] Chemical compound [NH4+].[Cr+3] PYKNDCILXQWMJP-UHFFFAOYSA-O 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 150000001845 chromium compounds Chemical class 0.000 description 2
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic Effects 0.000 description 1
- 230000024881 catalytic activity Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000379 polymerizing Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
Description
Изобретение относитс к области химической технологии, в частности к способам приготовлени окиснохромовых катализаторов дл полимеризации этилена.This invention relates to the field of chemical technology, in particular, to methods for preparing chromium oxide catalysts for the polymerization of ethylene.
Известен способ приготовлени катализатора дл полимеризации этилена обработкой носител растворами азотнокислого хрома и аммиака с последующей сушкой и активацией в токе воздуха нри температуре около 500°С. Катализатор, приготовленный по такому способу , обладает недостаточно высокой активностью .A known method of preparing a catalyst for the polymerization of ethylene by treating the carrier with solutions of chromium nitrate and ammonia, followed by drying and activation in a stream of air at a temperature of about 500 ° C. The catalyst prepared by this method does not have enough high activity.
С целью получени высокоактивного катализатора , а также устранени стадии активации катализатора в токе воздуха (что упрощает способ) по предлагаемому способу на носитель нанос т аммиакат трехвалентного хрома с последующей термовакуумпой обработкой при 300-700°С. В составе катализатора , приготовленного но такому способу, отсутствуют ионы хрома в степени окислени выше трех. Такой катализатор отличаетс большей каталитической активностью и отсутствием индукционного периода реакции полимеризации этилена в газовой фазе при проведении последней как при 100°С так и при комнатной температуре.In order to obtain a highly active catalyst, as well as eliminate the stage of catalyst activation in air flow (which simplifies the method), according to the proposed method, trivalent chromium ammonium is applied to the carrier followed by thermal vacuum treatment at 300-700 ° C. In the composition of the catalyst prepared by this method, there are no chromium ions in the oxidation state above three. Such a catalyst is characterized by greater catalytic activity and the absence of an induction period for the polymerization of ethylene in the gas phase when the latter is carried out both at 100 ° C and at room temperature.
в вакууме при 500°С в течение 30 мин. Выход полимера на таком катализаторе иа 25% больше, чем на катализаторе, приготовленном известным способом. Катализатор отличаетс 5 отсутствием индукционного периода реакции полимеризации этилена при проведении полимеризации без растворител .in vacuum at 500 ° C for 30 min. The polymer yield on this catalyst and 25% more than the catalyst prepared in a known manner. The catalyst is characterized by the absence of an induction period for the reaction of polymerizing ethylene when carrying out polymerization without solvent.
Пример 2. Катализатор, полученный обменом силикагел с растворомExample 2. The catalyst obtained by the exchange of silica gel with a solution
0Сг(ЫНз)б (КОз)з0Сг (ЫНз) б (КОЗ) з
и содержащий в результате обмена 1,2 вес. % хрома, подвергают активации в вакууме при 450°С в течение 3 час. На таком катализаторе скорость полимеризации этилена при 75°Сand containing as a result of an exchange of 1.2 wt. % chromium, subjected to activation in vacuum at 450 ° C for 3 hours. On this catalyst, the rate of polymerization of ethylene at 75 ° C
5 п давлении 7 атм в растворителе достигает 400 г полимера/г катализатора в час, в то врем как на катализаторе, приготовленном но известной методике, скорость полимеризации в аналогичных услови х на 30-40% меньще.A pressure of 7 atm in a solvent reaches 400 g of polymer / g of catalyst per hour, while on a catalyst prepared using a well-known method, the polymerization rate under similar conditions is 30–40% lower.
Предмет изобретени Subject invention
Способ приготовлени катализатора дл полимеризации этилена путем нанесени соединени хрома на носитель с последующейA method of preparing a catalyst for the polymerization of ethylene by applying a chromium compound on a carrier, followed by
5 термической активацией, отличающийс тем, что, с целью получени высокоактивного катализатора и упрощени способа, в качестве соединени хрома используют аммиакат трехвалентного хро.лга Сг (КНз)б (N03)3 и актива5 by thermal activation, characterized in that, in order to obtain a highly active catalyst and to simplify the process, the trivalent chromium ammonium Cr (KN3) b (N03) 3 and the asset are used as the chromium compound.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU331813A1 true SU331813A1 (en) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0085857A2 (en) * | 1982-01-20 | 1983-08-17 | Phillips Petroleum Company | Aging of chromium-containing gel at high pH |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0085857A2 (en) * | 1982-01-20 | 1983-08-17 | Phillips Petroleum Company | Aging of chromium-containing gel at high pH |
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