Methods for terminating olefin polymerizations

Patent metadata

Field	Value
Publication number	US-8940844-B2
Application number	US-201313864306-A
Country	US
Kind code	B2
Filing date	Apr 17, 2013
Priority date	Apr 28, 2011
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems.

First claim

We claim:

1. A composition consisting of:
isobutane; and
a catalyst deactivating agent comprising a compound having formula (II):
R 1 —O—R 3 —O—R 2   (II);

wherein:
R 1 and R 2 independently are a C 1 to C 18 hydrocarbyl group; and
R 3 is

 wherein R 4 is a C 1 to C 10 hydrocarbyl group.

2. The composition of claim 1 , wherein R 1 and R 2 independently are methyl, ethyl, propyl, or butyl.

3. The composition of claim 1 , wherein the catalyst deactivating agent has a boiling point of at least 80° C.

4. The composition of claim 1 , wherein the catalyst deactivating agent is miscible with propane, cyclohexane, isobutane, n-butane, n-pentane, isopentane, neopentane, n-hexane, benzene, or a mixture thereof.

5. The composition of claim 1 , wherein a weight ratio of isobutene to the catalyst deactivating agent is in a range from about 100:1 to about 1:100.

Assignees

• Chevron Phillips Chemical Co

Inventors

• Yang Qing
• Mcdaniel Max P
• Crain Tony R
• Collins Kathy S

Classifications

• C08F2400/02

  Control or adjustment of polymerization parameters · CPC title

• C08F2/42 Primary

  using short-stopping agents · CPC title

• C08F110/02

  Ethene · CPC title

• C09K15/06 Primary

  containing oxygen · CPC title

• C08F6/02 Primary

  Neutralisation of the polymerisation mass, e.g. killing the catalyst (short-stopping C08F2/42 ){also removal of catalyst residues} · CPC title