Patent DE-3260708-D1 (DE)
Title: Process for producing homo and copolymers of monoolefins by polymerization of the respective monomers with the aid of a ziegler-type catalyst comprising a vanadium-containing compound
Inventor: BACHL ROBERT DR
IPC: C08F4/68
Filed: 1982-04-22
Granted: 1984-10-18
Abstract: 1. A process for the production of homo- and copolymers of C2 -C6 -alpha-monoolefins by polymerizing the monomer or monomers at a temperature of from 30 to 200 degrees C and a pressure of from 1 to 200 bar by means of a Ziegler catalyst system consisting of (1) a vanadium-containing catalyst component (2) an aluminium-containing catalyst component of the formula  see diagramm : EP0064637,P8,F2 where R**1 is alkyl of 1 to 18 carbon atoms, R**2 is alkyl of 1 to 18 carbon atoms, and R**3 is alkyl of 1 to 18 carbon atoms, alkoxy of 1 to 12 carbon atoms, or chlorine, and, if desired, (3) a halohydrocarbon of 1 to 12 carbon atoms, with the provisos that the atomic ratio of vanadium from catalyst component (1) to aluminium from catalyst component (2) is from 1:0.1 to 1:500, and that the molar ratio of catalyst component (3), if present, to aluminium from catalyst component (2) is from 1:0.1 to 1:60, wherein there is used as vanadium-containing catalyst component (1) the solide (S) which has been obtained by (1.1) in a first stage, bringing together (1.1.1) an alkanol containing at least 3 carbon atoms and at least 2 hydroxyl groups, and (1.1.2) an aluminium alkyl of the formula  see diagramm : EP0064637,P9,F1  where R**4 is alkyl of 1 to 18 carbon atoms, R**5 is alkyl of 1 to 18 carbon atoms or alkoxy of 1 to 12 carbon atoms, and R**6 is alkyl of 1 to 18 carbon atoms, alkoxy of 1 to 12 carbon atoms, or chlorine, in one to fifty times the amount by volume, based on the aluminium alkyl (1.1.2), of a liquid, inert hydrocarbon, with the proviso that from 0.5 to 15 moles of the alkyl groups contained in the aluminium alkyl (1.1.2) are present per mole of the hydroxyl groups contained in the alkanol (1.1.1), and keeping the combined materials at a temperature of from 0 to 120 degrees C for from 0.2 to 6 hours, with continuous mixing, a mixture of a solid and a liquid being obtained, then (1.2) in a second stage, bringing together (1.2.1) the solid obtained in stage (1.1), with or without having separated off the accompanying liquid, and (1.2.2) a transition metal compound of the formula VCl4 , VOCl3 , VO(OR**7 )3 .nTi(OR**7 )4 or VCl4 .nTiCl4 , where R**7 is alkyl of 1 to 18 carbon atoms, or phenyl, and n is from 0 to 9, in a liquid, inert hydrocarbon, with the proviso that from 0.1 to 2 moles of the transition metal contained in the transition metal compound (1.2.2) are present per mole of the hydroxyl groups originally contained in the alkanol (1.1.1), and keeping the combined materials at a temperature of from 0 to 100 degrees C for from 0.1 to 10 hours, with continuous mixing, a mixture of a solid and a liquid again being obtained, and finally (1.3) in an optional third stage, separating the solid from the mixture obtained in stage (1.2) and, if desired, washing the solid with an inert hydrocarbon which is liquid at S.T.P. and boils at below 150 degrees C, and effecting drying, and thus obtaining, as the novel vanadium-containing catalyst component (1), the solid (S) present in the mixture obtained in stage (1.2), or obtained as such in stage (1.3).