EP0279153A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for increasing the efficiency of a pre-polymerized catalyst
Assignee: Fina Technology Inc
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Filing: 1987-09-21
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Granted: —
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Expires: 2007-09-21
Abstract
Abstract The invention provides a process for pre-polymerizing olefin polymerization catalysts and a process for increasing the efficiency of pre-polymerized olefin polymerization catalysts. In one process of this invention an olefin monomer is added to a fluid carrier stream containing an olefin polymerization catalyst. The carrier stream containing the monomer and the catalyst is passed through an elongated tubular reactor at a flow rate sufficient to provide a residence time in the tubular reactor of less than 1 minute and under temperature conditions to pre-polymerize the catalyst within the tubular reactor without plugging of the reactor. In another process of this invention a pre-polymerized catalyst is contacted with a cocatalyst or a mixture of cocatalyst and an electron donor prior to introducing the catalyst into a polymerization reaction zone.
Inventors
- 👤 John A. Ewen
- 👤 Alan H. Bitzer
- 👤 David L. Gressett
- 👤 Herbert G. Hummel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:54
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1812; B01J19/1837; C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F110/00; C08F110/04; C08F110/06
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
101 words
A. process for supplying a pretreated Ziegler-type catalyst to an olefin polymerization reactor, the steps comprising: (a) establishing a fluid carrier stream containing said catalyst; (b) adding olefin monomer to said carrier stream of (a); (c) flowing said carrier stream of (b) through an elongated tubular reactor at a flow rate sufficient to provide a residence time in said tubular reactor of less than about one minute under temperature conditions to pre-polymerize said catalyst by the polymerization of said monomer within said tubular reactor without plugging of said tubular reactor; and passing said carrier stream of (c) to the polymerization reactor.
Claim 2
Dependent Claim
101 words
A. process for supplying a pretreated Ziegler-type catalyst to an olefin polymerization reactor, the steps comprising: (a) establishing a fluid carrier stream containing said catalyst; (b) adding olefin monomer to said carrier stream of (a); (c) flowing said carrier stream of (b) through an elongated tubular reactor at a flow rate sufficient to provide a residence time in said tubular reactor of less than about one minute under temperature conditions to pre-polymerize said catalyst by the polymerization of said monomer within said tubular reactor without plugging of said tubular reactor; and passing said carrier stream of (c) to the polymerization reactor.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the residence time in said tubular reactor is no more than 10 seconds.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein said residence time is not more than 2 seconds.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the volume of said tubular reactor is less than 1 liter.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein said tubular reactor has an internal diameter of no more than 1 centimeter.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein said olefin monomer is propylene.
Claim 8
Dependent Claim
29 words
The process of claim 6 wherein the residence time of said carrier stream within said tubular reactor after the addition of propylene monomer is no more than ten seconds.
Claim 9
Dependent Claim
18 words
The process of claim 7 wherein said tubular reactor is operated at a temperature no greater than 30°C.
Claim 10
Dependent Claim
35 words
The process of claim 6 wherein said Ziegler-type catalyst is used in conjunction with a cocatalyst and an electron donor entrained in said carrier stream at the time of the addition of the Ziegler-type catalyst.
Claim 11
Dependent Claim
26 words
The process of claim 6 wherein the weight ratio of propylene monomer to said Ziegler-type catalyst supplied to said tubular reactor is no more than 10.
Claim 12
Dependent Claim
131 words
A process for supplying a pretreated Ziegler-type catalyst to a continuous flow reactor for the polymerization of propylene in the liquid phase, the steps comprising: (a) establishing a fluid carrier stream composed of a liquid hydrocarbon solvent containing a cocatalyst for said Ziegler-type catalyst; (b) adding said Ziegler-type catalyst to said carrier stream of (a); (c) adding liquid propylene to said carrier stream of (b); (d) flowing said carrier stream of (c) through an elongated tubular reactor at a flow rate sufficient to provide a residence time in said tubular reactor of less than one minute and under temperature conditions to pre-polymerize said catalyst by the polymerization of said liquid propylene within said reactor without plugging said tubular reactor; and (e) passing said carrier stream of (d) to said continuous reactor.
Claim 13
Dependent Claim
131 words
A process for supplying a pretreated Ziegler-type catalyst to a continuous flow reactor for the polymerization of propylene in the liquid phase, the steps comprising: (a) establishing a fluid carrier stream composed of a liquid hydrocarbon solvent containing a cocatalyst for said Ziegler-type catalyst; (b) adding said Ziegler-type catalyst to said carrier stream of (a); (c) adding liquid propylene to said carrier stream of (b); (d) flowing said carrier stream of (c) through an elongated tubular reactor at a flow rate sufficient to provide a residence time in said tubular reactor of less than one minute and under temperature conditions to pre-polymerize said catalyst by the polymerization of said liquid propylene within said reactor without plugging said tubular reactor; and (e) passing said carrier stream of (d) to said continuous reactor.
Claim 14
Dependent Claim
39 words
The process of claim 11 wherein an electron donor compound is incorporated into said carrier stream prior to the incorporation of said propylene and wherein said cocatalyst is present upon contact of said Ziegler-type catalyst and said electron donor.
Claim 15
Dependent Claim
27 words
The process of claim 11 wherein the weight ratio of said propylene to said Ziegler-type catalyst supplied to said tubular reactor is within the range of 2-10.
Claim 16
Dependent Claim
19 words
The process of claim 11 wherein the residence time in said tubular reactor is no more than 10 seconds.
Claim 17
Dependent Claim
15 words
The process of claim 14 wherein said residence time is no more than 2 seconds.
Claim 18
Dependent Claim
17 words
The process of claim 11 wherein the volume of said tubular reactor is less than 1 liter.
Claim 19
Dependent Claim
35 words
A process for the polymerization of olefins, comprising: (a) contacting a pre-polymerized Ziegler-type catalyst with a cocatalyst, (b) introducing said pre-polymerized Ziegler-type catalyst and said cocatalyst into a polymerization reaction zone containing an olefin monomer.
Claim 20
Dependent Claim
35 words
A process for the polymerization of olefins, comprising: (a) contacting a pre-polymerized Ziegler-type catalyst with a cocatalyst, (b) introducing said pre-polymerized Ziegler-type catalyst and said cocatalyst into a polymerization reaction zone containing an olefin monomer.
Claim 21
Dependent Claim
27 words
The process of claim 17 wherein the catalyst is pre-polymerized by contacting under pre-polymerization conditions the catalyst with a cocatalyst, an electron donor compound, and a monomer.
Claim 22
Dependent Claim
42 words
The process of claim 17 wherein the contacting of the catalyst with the cocatalyst in step (a) occurs as the catalyst is contacted with a stream of cocatalyst, said stream of cocatalyst also acting to introduce the catalyst into the reaction zone.
Claim 23
Dependent Claim
28 words
The process of claim 17 wherein the pre-polymerized catalyst is coated with the polymeric coating such that the weight ratio of the polymeric coating/catalyst is less than 10.
Claim 24
Dependent Claim
13 words
The process of claim 17 wherein the cocatalyst is an alkyl aluminum compound.
Claim 25
Dependent Claim
12 words
The process of claim 1 wherein the cocatalyst is a triethylaluminum compound.
Claim 26
Dependent Claim
10 words
The process of claim 17 wherein the monomer is propylene.
Claim 27
Dependent Claim
27 words
The process of claim 17 wherein the pre-polymerized Ziegler-type catalyst is also contacted with an electron donor compound prior to being introduced into the polymerization reaction zone.
Claim 28
Dependent Claim
15 words
The process of claim 24 wherein the electron donor compound is an organic silicon compound.
Claim 29
Dependent Claim
17 words
The process of claim 25 wherein the monomer is propylene and the cocatalyst is a triethylaluminum compound.
Claim 30
Dependent Claim
44 words
The process of claim 25 wherein the contacting of the catalyst with said cocatalyst and said electron donor compound is accomplished by feeding the catalyst into a stream of dilute cocatalyst and dilute electron donor, said stream introducing the catalyst into the reaction zone.
Claim 31
Dependent Claim
61 words
The process for increasing the efficiency of a catalyst used in the polymerization of olefins comprising: (a) pre-polymerizing said catalyst by contacting under pre-polymerization conditions said catalyst with a cocatalyst and an olefin monomer; (b) washing said catalyst with an organic solvent; and (c) contacting the catalyst with a cocatalyst prior to introduction of the catalyst into a polymerization reaction zone.
Claim 32
Dependent Claim
61 words
The process for increasing the efficiency of a catalyst used in the polymerization of olefins comprising: (a) pre-polymerizing said catalyst by contacting under pre-polymerization conditions said catalyst with a cocatalyst and an olefin monomer; (b) washing said catalyst with an organic solvent; and (c) contacting the catalyst with a cocatalyst prior to introduction of the catalyst into a polymerization reaction zone.
Claim 33
Dependent Claim
36 words
The process of claim 28 further comprising step (d) contacting the catalyst with an electron donor compound simultaneously with or after step (c) but prior to the introduction of the catalyst into the polymerization reaction zone.
Claim 34
Dependent Claim
18 words
The process of claim 30 further comprising contacting said catalyst in step (a) with an electron donor compound.
Claim 35
Dependent Claim
21 words
The process of claim 31 wherein the electron donor compound in both steps (a) and (d) is an organic silicon compound.
Claim 36
Dependent Claim
32 words
The process of claim 28 wherein the pre-polymerizing of the catalyst results in a polymer coated catalyst in which the weight ratio of polymer to catalyst is within the range of 2-10.
Claim 37
Dependent Claim
37 words
The process of claim 30 wherein steps (c) and (d) occur as the pre-polymerized catalyst contacts a stream of dilute cocatalyst and dilute electron donor, said stream acting to introduce the pre-polymerized catalyst into the reaction zone.
Claim 38
Dependent Claim
10 words
The process of claim 34 wherein said monomer is propylene.
References Cited (Backward Citations)
No citation records indexed.
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