Plants and processes for forming polymers
AssigneeExxonMobil Chemical Patents Inc.
InventorYu Feng Wang
Life of this patent
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Abstract
The present invention relates to a process of forming a polymer, the process comprising polymerizing olefin monomers to form a reaction mixture, treating the reaction mixture to form a first polymer-rich phase, treating the first polymer-rich phase to form a second polymer-rich phase, and devolatilizing the second polymer-rich phase, the process further comprising at least one step of adjusting the temperature of a first and/or the second polymer-rich phase before the devolatilization. The present invention also relates to a plant that is useful for the process provided above.
Claims16
A process of forming a polymer comprising the steps of:
- (a) supplying a feed having one or more olefin monomers and a solvent;
- (b) contacting the feed with a catalyst to form a reaction mixture;
- (c) treating the reaction mixture to form a first polymer-rich phase;
- (d) treating the first polymer-rich phase to form a second polymer-rich phase;
- (e) devolatilizing the second polymer-rich phase to obtain the polymer, and
- (x) adjusting between step (c) and step (e) the temperature of the first or the second polymer-rich phase.
A process of forming a polymer comprising the steps of:
- (a) supplying a feed having propylene and at least one comonomer selected from the group consisting of ethylene and C4 to C8 alpha-olefins in a solvent;
- (b) contacting the feed with a catalyst to form a reaction mixture;
- (c) treating the reaction mixture to form a first polymer-rich phase;
- (d) heating the first polymer-rich phase;
- (e) treating the heated first polymer-rich phase to form a second polymer-rich phase;
- and
- (f) devolatilizing the second polymer-rich phase to obtain the polymer,
- wherein the polymer has a viscosity greater than 0.01 Pa s as measured by ASTM-D3236 at 190° C. and a ML (1+4, 125° C.) less than 100 as measured by ASTM-D1646.
A process of forming a polymer comprising the steps of:
- (a) supplying a feed having propylene and at least one comonomer selected from the group consisting of ethylene and C4 to C8 alpha-olefins in a solvent;
- (b) contacting the feed with a catalyst to form a reaction mixture;
- (c) treating the reaction mixture to form a first polymer-rich phase;
- (d) cooling the first polymer-rich phase;
- (e) treating the cooled first polymer-rich phase to form a second polymer-rich phase;
- and
- (f) devolatilizing the second polymer-rich phase to obtain the polymer;
- wherein the polymer has a viscosity measured by ATSM-D3236 at 190° C. of less than 0.01 Pa·s.
Dependencies are inferred from the claim text.