IP Library › Granted Patent US 7,084,284
Granted Patent B2
US 7,084,284 · App. 10/990,028 · Granted Aug 1, 2006

Separation process

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Quick Facts
Patent No.
US 7,084,284
App. No.
10/990,028
Granted
Aug 1, 2006
Kind
B2
Abstract

Phosphine and/or phosphine oxide promoters are effectively separated from propylene oxide reaction solvents through use of a membrane effective to retain the phosphine and/or phosphine oxide.

Claims (7)

1. The process for the production of propylene oxide by reaction of propylene, oxygen and hydrogen in a liquid solvent in the presence of a solid catalyst and a phosphine and/or phosphine oxide promoter, which comprises

a) reacting propylene, oxygen and hydrogen in a liquid solvent in the presence of a solid catalyst and a phosphine and/or phosphine oxide promoter to form a reaction mixture comprised of propylene oxide,

b) separating solid catalyst from said reaction mixture,

c) contacting the mixture from which solid catalyst has been separated either before or after separation of propylene oxide with a membrane effective to retain phosphine and/or phosphine oxide promoter while permitting passage of solvent and propylene oxide, and

d) recycling at least a portion of retained phosphine and/or phosphine oxide promoter from step c) to step a).

2. The process of claim 1 wherein the promoter is triphenyl phosphine.

3. The process of claim 1 wherein the membrane is a hydrophilic nanofiltration or reverse osmosis membrane.

Assignments (12)
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, LP
Reel/Frame 024337/0020 →
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, LP
Reel/Frame 024337/0285 →
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.; EQUISTAR CHEMICALS, LP
Reel/Frame 024337/0705 →
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.; EQUISTAR CHEMICALS, LP
Reel/Frame 024337/0856 →
SECURITY AGREEMENT Recorded Oct 30, 2009
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 023449/0138 →
SECURITY AGREEMENT Recorded Apr 9, 2009
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: CITIBANK, N.A., AS ADMINISTRATIVE AGENT AND COLLATERAL AGENT
Reel/Frame 022708/0830 →
SECURITY AGREEMENT Recorded Aug 4, 2008
From: BASELL POLYOLEFINE GMBH; ARCO CHEMICAL TECHNOLOGY L.P.; ARCO CHEMICAL TECHNOLOGY, INC.; ATLANTIC RICHFIELD COMPANY; BASELL NORTH AMERICA, INC.; BASELL POLYOLEFIN GMBH; LYONDELL CHEMICAL COMPANY; EQUISTAR CHEMICALS, L.P.
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 021354/0708 →
GRANT OF SECURITY INTEREST IN UNITED STATES PATENTS AND PATENT APPLICATIONS Recorded Mar 26, 2008
From: BASELL POLYOLEFINE GMBH; ARCO CHEMICAL TECHNOLOGY L.P.; ARCO CHEMICAL TECHNOLOGY, INC.; ATLANTIC RICHFIELD COMPANY; BASELL NORTH AMERICA, INC.; EQUISTAR CHEMICALS. LP.; LYONDELL CHEMICAL COMPANY; LYONDELL CHEMICAL TECHNOLOGY, L.P.; LYONDELL PETROCHEMICAL COMPANY; NATIONAL DISTILLERS AND CHEMICAL CORPORATION; OCCIDENTAL CHEMICAL CORPORATION; OLIN CORPORATION; QUANTUM CHEMICAL CORPORATION; BASELL POLYOLEFIN GMBH
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 020704/0562 →
RELEASE OF LYONDELL CHEMICAL TECHNOLOGY, L.P. PATENT SECURITY AGREEMENT Recorded Mar 20, 2008
From: JPMORGAN CHASE BANK, N.A.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 020679/0063 →
SECURITY AGREEMENT Recorded Sep 15, 2006
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: JPMORGAN CHASE BANK N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 018260/0306 →
CHANGE OF NAME Recorded Jun 27, 2005
From: ARCO CHEMICAL TECHNOLOGY, L.P.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 016206/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 16, 2004
From: MILLER, JAY F.
To: ARCO CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 016002/0885 →