RU2018107540A - Металлоценовые двойные каталитические системы циглера-натта с активаторами-носителями - Google Patents

Металлоценовые двойные каталитические системы циглера-натта с активаторами-носителями Download PDF

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RU2018107540A
RU2018107540A RU2018107540A RU2018107540A RU2018107540A RU 2018107540 A RU2018107540 A RU 2018107540A RU 2018107540 A RU2018107540 A RU 2018107540A RU 2018107540 A RU2018107540 A RU 2018107540A RU 2018107540 A RU2018107540 A RU 2018107540A
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supported catalyst
titanium
magnesium
composition according
metallocene compound
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RU2018107540A
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RU2018107540A3 (ru
RU2730017C2 (ru
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Эррун ДИНГ
Цин Ян
Ллойд В. ГАТНИ
Джеффри Ф. ГРЕКО
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Шеврон Филлипс Кемикал Компани Лп
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Claims (38)

1. Способ получения каталитической композиции, включающий:
(i) приведение в контакт:
(a) фторированного оксида алюминия с покрытием из диоксида кремния;
(b) магниевогосоединения; и
(c) соединения титана (IV) и/или соединения ванадия;
с образованием катализатора на носителе; и
(ii) приведение в контакт катализатора на носителе, металлоценового соединения и сокатализатора с образованием каталитической композиции.
2. Способ по п. 1, отличающийся тем, что этап (i) проводят в неполярном растворителе.
3. Способ по п. 1, отличающийся тем, что этап (i) проводят в полярном апротонном растворителе.
4. Способ по п. 1, отличающийся тем, что фторированный оксид алюминия с покрытием из диоксида кремния содержит от около 20 до около 45% мас. диоксида кремния и от около 2 до около 15% мас. фтора.
5. Способ по п. 1, отличающийся тем, что катализатор на носителе содержит от около 0,5 до около 7% мас. магния.
6. Способ по п. 5, отличающийся тем, что магниевое соединение не является восстанавливающим агентом.
7. Способ по п. 1, отличающийся тем, что катализатор на носителе содержит от около 0,5 до около 10% мас. титана.
8. Способ по п. 7, отличающийся тем, что катализатор на носителе по существу не содержит Ti(III).
9. Каталитическая композиция, содержащая:
(А) катализатор на носителе, содержащий:
(a) фторированный оксид алюминия с покрытием из диоксида кремния;
(b) магниевое соединение; и
(c) титан (IV) и/или ванадий;
(B) металлоценовое соединение; и
(C) сокатализатор.
10. Композиция по п. 9, отличающаяся тем, что
фторированный оксид алюминия с покрытием из диоксида кремния содержит от около 20 до около 45% мас. диоксида кремния и от около 3 до около 12% мас. фтора;
катализатор на носителе содержит от около 0,5 до около 3% мас. магния, и магниевое соединение не является восстанавливающим агентом; и
катализатор на носителе содержит от около 0,5 до около 10% мас. титана, и катализатор на носителе по существу не содержит Ti(III).
11. Композиция по п. 10, отличающаяся тем, что катализатор на носителе содержит соединение титана (IV), содержащее галогенид титана, алкоксид титана, алкоксигалогенид титана или их комбинацию.
12. Композиция по п. 9, отличающаяся тем, что катализатор на носителе содержит галогенид магния, алкоксид магния, алкоксигалогенид магния или их комбинацию.
13. Композиция по п. 9, отличающаяся тем, что катализатор на носителе содержит от около 1 до около 50 ч./млн. THF по массе.
14. Композиция по п. 9, отличающаяся тем, что молярное отношение металлоценового соединения к титану (IV) в каталитической композиции находится в диапазоне от около 10:1 до около 1:10.
15. Композиция по п. 14, отличающаяся тем, что металлоценовое соединение содержит мостиковое металлоценовое соединение на основе циркония или гафния с циклопентадиенильной группой и флуоренильной группой, и с алкенильным заместителем в мостиковой группе и/или в циклопентадиенильной группе.
16. Композиция по п. 14, отличающаяся тем, что металлоценовое соединение содержит немостиковое металлоценовое соединение на основе циркония или гафния, содержащее две циклопентадиенильных группы, две инденильных группы или циклопентадиенильную и инденильную группы.
17. Композиция по п. 9, отличающаяся тем, что каталитическая композиция имеет каталитическую активность выше, чем около 10000 г/г/час в условиях суспензионной полимеризации с триизобутилалюминиевым сокатализатором, с использованием изобутана в качестве разбавителя, при температуре полимеризации 90 °C и давлении в реакторе 2,76 МПа (400 фунт/кв. дюйм).
18. Способ полимеризации олефинов, включающий приведение в контакт каталитической композиции, по п. 9, и олефинового мономера и, необязательно, олефинового сомономера в системе реактора-полимеризатора в условиях полимеризации для получения олефинового полимера.
19. Способ по п. 18, отличающийся тем, что:
система реактора-полимеризатора содержит суспензионный реактор, газофазный реактор, растворный реактор или их комбинацию;
олефиновый полимер представляет собой сополимер этилен/альфа-олефин; и
сополимер этилен/альфа-олефин имеет меньше чем около 0,005 длинноцепочечных ветвей на 1000 совокупных атомов углерода и/или имеет по существу постоянное распределение короткоцепочечных ветвей.
20. Способ по п. 18, отличающийся тем, что повышение индекса расплава олефинового полимера при добавлении водорода в количестве от 0 до 880 ч./млн. больше, чем повышение индекса расплава олефинового полимера, полученного с использованием той же каталитической системы без металлоценового соединения, при тех же условиях полимеризации.
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