IP Library › Granted Patent US 7,700,790
Granted Patent B2
US 7,700,790 · App. 11/588,453 · Granted Apr 20, 2010

Alkylene oxide process

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Quick Facts
Patent No.
US 7,700,790
App. No.
11/588,453
Granted
Apr 20, 2010
Kind
B2
Abstract

A process is provided for the production of alkylene oxide by catalytic reaction of olefin, hydrogen and oxygen in the presence of promoting buffer salts, the improvement wherein the buffer salts are recovered by electrodialysis and/or crystallization and recycled to the catalytic reaction.

Claims (6)

1. In a process for the production of alkylene oxide by catalytic reaction of olefin, oxygen and hydrogen in a solvent comprised of methanol or a mixture of methanol and water wherein the reaction is modified by the presence of buffer salts in the reaction mixture, the improvement which comprises recovering the buffer salts by electrodialysis and/or crystallization and recycling the recovered buffer salts to the catalytic reaction.

2. The process of claim 1 wherein the alkylene oxide is propylene oxide.

3. The process of claim 1 wherein the reaction mixture pH is maintained at a value of 3-10.

4. The process of claim 1 wherein the buffer salts are recovered by electrodialysis.

5. The process of claim 1 wherein the buffer salts are recovered by crystallization.

6. The process of claim 1 wherein the buffer salts are alkali metal or ammonium phosphates.

Assignments (18)
RELEASE OF SECURITY INTEREST Recorded Jan 23, 2014
From: DEUTSCHE BANK TRUST COMPANY AMERICAS
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 032123/0799 →
RELEASE OF SECURITY INTEREST Recorded Jan 23, 2014
From: CITIBANK, N.A.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 032125/0296 →
RELEASE OF SECURITY INTEREST Recorded Jan 23, 2014
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 032137/0156 →
APPOINTMENT OF SUCCESSOR ADMINISTRATIVE AGENT Recorded Jan 23, 2014
From: UBS AG, STAMFORD BRANCH
To: BANK OF AMERICA, N.A.
Reel/Frame 032137/0639 →
RELEASE OF SECURITY INTEREST Recorded Jan 23, 2014
From: BANK OF AMERICA, N.A.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 032138/0134 →
SECURITY AGREEMENT Recorded May 19, 2010
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 024402/0681 →
SECURITY AGREEMENT Recorded May 18, 2010
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: CITIBANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 024397/0818 →
SECURITY AGREEMENT Recorded May 6, 2010
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: DEUTSCHE BANK TRUST COMPANY AMERICAS, AS COLLATERAL AGENT
Reel/Frame 024342/0421 →
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 →
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: 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, LP
Reel/Frame 024337/0020 →
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 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 1, 2008
From: MILLER, JAY F.; CHANG, TE
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 020476/0484 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 27, 2006
From: MILLER, JAY F.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 018474/0289 →