摘要:
Process for the polymerization of ethylene with C 3 -C 10 alpha-olefins in suspension of liquid monomer in the presence of a catalyst containing Vanadium obtained by the precipitation, in an atmosphere of ethylene or alpha-olefins, of:
a) a compound of Vanadium in the oxidation state of 3 to 5, with b) a basically hydrocarbon solution of a compound selected from those having general formula R n AlX m wherein R is a C 1 -C 20 alkyl radical, X is a halogen, m+n = 3 , n is an integer from 0 to 2.
摘要翻译:在含有钒的催化剂存在下,在乙烯或α-烯烃气氛中沉淀出的液体单体悬浮液中乙烯与C 3 -C 10α-烯烃的聚合方法为:a)将钒的化合物 氧化态为3〜5,b)选自具有通式RnAlXm的化合物的基本烃溶液,其中R为C1-C20烷基,X为卤素,m + n = 3,n为整数 从0到2。
摘要:
Process for the preparation of elastomeric copolymers of ethylene, wherein ethylene is copolymerized with an α-olefin, and possibly with a diene as termonomer, in the presence of a Ziegler-Natta catalyst including a solid component of catalyst based on titanium and aluminium, supported on magnesium chloride and obtained, in accordance with a special procedure, in the form of a spherical granular solid. This process produces elastomeric copolymers having a low crystallinity even with a high content of linked ethylene.
摘要:
Process for the polymerization of ethylene with C 3 -C 10 alpha-olefins in suspension of liquid monomer in the presence of a catalyst containing Vanadium obtained by the precipitation, in an atmosphere of ethylene or alpha-olefins, of: a) a compound of Vanadium in the oxidation state of 3 to 5, with b) a basically hydrocarbon solution of a compound selected from those having general formula R n AlX m wherein R is a C 1 -C 20 alkyl radical, X is a halogen, m+n = 3 , n is an integer from 0 to 2.
摘要:
Catalytic component for the polymerization of ethylene with propylene prepared by:
a) impregnation of an inert support with a solution of a compound of Vanadium having an oxidation state of between 3 and 5; b) subsequent treatment with a solution of a compound having general formula (I) R n AlX m wherein R is a C₁-C₂₀ alkyl radical, X is a halogen, n + m = 3 , and m is an integer between 0 and 2, the molar ratio between Aluminium in step (b) and Vanadium in step (a) being from 1/1 to 6/1.
摘要翻译:通过以下方法制备乙烯与丙烯聚合的催化组分:a)用氧化态为3至5的钒化合物的溶液浸渍惰性载体; b)随后用具有通式(I)RnAlXm的化合物的溶液进行后处理,其中R是C1-C20烷基,X是卤素,n + m = 3,m是0和2之间的整数, 步骤(b)中的铝与步骤(a)中的钒的比例为1/1至6/1。
摘要:
In an improved process for producing elastomeric ethylene-propylene copolymers with a propylene content comprised within the range of from 22 to 38 % by weight and a content of residual chlorine, coming from the co-catalyst, lower than 300 parts per million parts, the polymerization is carried out in suspension in the monomers in the liquid state, with vanadium triacetylacetonate and alkyl-Al compounds, and the obtained polymer is recovered without any washing steps.
摘要:
Process for the preparation in liquid phase of copolymers of ethylene with propylene and optionally another diene, in the presence of a catalyst selected from (a) Titanium salt supported on magnesium salt and (b) compound of Vanadium soluble in hydrocarbon solvents either supported on an inert material or prepolymerized, and a co-catalyst essentially consisting of an organic compound of Aluminium, and a possible chlorinated activator, characterized in that: 1) when the polymerization is almost complete, a solid material insoluble in the reaction environment and having an average diameter of between 0.001 and 200 microns is added to the reaction mixture; 2) the suspension of polymer and solid material are kept in contact for a sufficient time to obtain perfectly free-flowing polymeric particles; 3) the perfectly free-flowing polymeric particles of step (2) are recovered.
摘要:
Process for the preparation in liquid phase of copolymers of ethylene with propylene and optionally another diene, in the presence of a catalyst selected from (a) Titanium salt supported on magnesium salt and (b) compound of Vanadium soluble in hydrocarbon solvents either supported on an inert material or prepolymerized, and a co-catalyst essentially consisting of an organic compound of Aluminium, and a possible chlorinated activator, characterized in that:
1) when the polymerization is almost complete, a solid material insoluble in the reaction environment and having an average diameter of between 0.001 and 200 microns is added to the reaction mixture; 2) the suspension of polymer and solid material are kept in contact for a sufficient time to obtain perfectly free-flowing polymeric particles; 3) the perfectly free-flowing polymeric particles of step (2) are recovered.