EP0039971A1
Expired / Lapsed
EP
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Process for the preparation of a polymerization catalyst and preparation of ethylene polymer therewith
Assignee: DSM BV
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Filing: 1981-05-07
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Granted: —
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Expires: 2001-05-07
Abstract
Abstract An improved process for the preparation of a catalyst for the polymerization of ethylene, and an improved process for preparing an ethylene polymer therewith. An improved supported chromium-containing catalyst is prepared by reacting (1) a chromium chelate of a 1,3-diketo compound and (2) a vanadium chelate or a vanadyl chelate of a 1,3-diketo compound, separately or jointly with (3) an organometallic compound of an element from Group II or III of the periodic system, jointly contacting the resulting reaction products of (1) and (2) with (3) with an inert inorganic supporting material so as to deposit such reaction products thereon, whereafter the supporting material containing the reaction products is heated in a non-reducing atmosphere at a temperature of between 200 DEG and 1200 DEG C. The 1,3-diketo compounds of (1) and (2) are the same or different, and have the formula <IMAGE> wherein R1, R2 and R3 are the same or different, R1 and R3 being an alkyl group of 1-10 carbon atoms, and R2 being selected from the group consisting of an alkyl group with 1-10 carbon atoms, and a hydrogen atom. The catalyst so prepared can be used either alone, or together with an organo-metallic compound of an element of Group II or III of the periodic system, in the polymerization of polyethylene or in the copolymerization of polyethylene with up to 15 mole percent of one or more alpha -alkenes having 3 to 15 carbon atoms.
Inventors
- 👤 Lambertus Johannes M.A. Van De Leemput
- 👤 Godefridus Arnoldus Henricus Nooijen
- 👤 Hendrikus Willem Van Der Loo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 02:06
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
226 words
Process for the preparation of a supported chromium oxide type of catalyst for the polymerization of olefins by bringing the conversion product of a chromium-l,3-diketo compound and an organometallic compound of a metal from group II or III of the periodic system on an inert inorganic support, specifically on silica, and heating the whole in a non-reducing atmosphere at a temperature of between 200 and 1200 °C, characterized in that a chromium-1,3-diketo compound with the formula Cr(OCR I CR 2 CR 3 0) 3 , where R 1 , R 2 and R 3 are the same or different and represent, each of them, an alkyl group with 1-10 carbon atoms and R 2 may, moreover, represent a hydrogen atom, and a vanadium chelate or a vanadyl chelate of a 1,3-diketo compound with the formula wherein R 1 , R 2 and R 3 have the aforesaid meanings, are reacted, separately or jointly, with an organometallic compound of a metal from group II or III of the periodic system, in which hydrocarbyl groups with 1-20 carbon atoms are bound, via a carbon atom, to the relative metal, the reaction products are jointly contacted with and deposited on an inert inorganic support and the support with the chromium and vanadium compounds deposited thereon is heated in a non-reducing atmosphere at a temperature of 200 to 1200 °C.
Claim 2
Dependent Claim
226 words
Process for the preparation of a supported chromium oxide type of catalyst for the polymerization of olefins by bringing the conversion product of a chromium-l,3-diketo compound and an organometallic compound of a metal from group II or III of the periodic system on an inert inorganic support, specifically on silica, and heating the whole in a non-reducing atmosphere at a temperature of between 200 and 1200 °C, characterized in that a chromium-1,3-diketo compound with the formula Cr(OCR I CR 2 CR 3 0) 3 , where R 1 , R 2 and R 3 are the same or different and represent, each of them, an alkyl group with 1-10 carbon atoms and R 2 may, moreover, represent a hydrogen atom, and a vanadium chelate or a vanadyl chelate of a 1,3-diketo compound with the formula wherein R 1 , R 2 and R 3 have the aforesaid meanings, are reacted, separately or jointly, with an organometallic compound of a metal from group II or III of the periodic system, in which hydrocarbyl groups with 1-20 carbon atoms are bound, via a carbon atom, to the relative metal, the reaction products are jointly contacted with and deposited on an inert inorganic support and the support with the chromium and vanadium compounds deposited thereon is heated in a non-reducing atmosphere at a temperature of 200 to 1200 °C.
Claim 3
Dependent Claim
36 words
Process according to claim 1, characterized in that the 1,3-diketo complexes are reacted with 0.5-20 moles of organometallic compound of a metal from group II or III of the periodic system per mole of transition metal.
Claim 4
Dependent Claim
37 words
Process according to claim 2, characterized in that the 1,3-diketo complexes are reacted with 1-6 moles of an organometallic compound of a metal from group II or III of the periodic system per mole of transition metal.
Claim 5
Dependent Claim
16 words
Process according to claims 1-3, characterized in that the 1,3-diketo complexes are reacted with an aluminiumtrialkyl.
Claim 6
Dependent Claim
16 words
Process according to claims 1-4, characterized in that the 1,3-diketo complexes are reacted with a magnesiumdialkyl.
Claim 7
Dependent Claim
16 words
Process according to claims 1-5, characterized in that the 1,3-diketo complex of chromium is the chromium(III)-acetylacetonate.
Claim 8
Dependent Claim
14 words
Process according to claims 1-6, characterized in that the vanadium compound is an acetylacetonate.
Claim 9
Dependent Claim
13 words
Process according to claims 1-7, characterized in that the vanadium compound is vanadium(III)acetylacetonate.
Claim 10
Dependent Claim
24 words
Process according to claims 1-8, characterized in that the molar ratio of vanadium to chromium is from 50 : 1 to 1 : 50.
Claim 11
Dependent Claim
24 words
Process according to claim 9, characterized in that the molar ratio of vanadium to chromium is from 20 : 1 to 1 : 20.
Claim 12
Dependent Claim
24 words
Process according to claims 9-10, characterized in that the molar ratio of vanadium to chromium is from 10 : 1 to 1 : 10.
Claim 13
Dependent Claim
15 words
Process according to claims 1-11, characterized in that the inert inorganic support is silicon oxide.
Claim 14
Dependent Claim
22 words
Process according to claims 1-12, characterized in that the support with the reaction product deposited thereon is heated in an oxygen-containing atmosphere.
Claim 15
Dependent Claim
22 words
Process according to claims 1-13, characterized in that the support with the reaction product deposited thereon is heated at 400 °C-1200 °C.
Claim 16
Dependent Claim
13 words
Catalyst obtained according to the process of any one of the claims 1-14.
Claim 17
Dependent Claim
103 words
Process for the polymerization of ethylene or the copolymerization of ethylene with 15 moles % at most of one or more a(-alkenes with 3 to 15 carbon atoms in the presence of a supported chromium oxide type of catalyst obtained by bringing the conversion product of a chromium-l,3-diketo compound and a R organometallic compound of a metal from group II or III of the periodic system on an inert inorganic support, specifically on silica, and heating the whole in a non-reducing atmosphere at a temperature of between 200 °C and 1200 °C, characterized in that a catalyst according to claim 15 is used.
Claim 18
Dependent Claim
33 words
Process according to claim 16, characterized in that the polymerization is also carried out in the presence of an organometallic compound of a metal of group II or III of the periodic system.
Claim 19
Dependent Claim
16 words
Process according to claim 17, characterized in that, as an organometallic compound, a trialkylaluminium is used.
References Cited (Backward Citations)
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