IP Library › Granted Patent US 7,812,191
Granted Patent B2
US 7,812,191 · App. 12/151,554 · Granted Oct 12, 2010

Removing hydrocarbon impurities from acetic acid by ionic liquid extraction

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Quick Facts
Patent No.
US 7,812,191
App. No.
12/151,554
Granted
Oct 12, 2010
Kind
B2
Abstract

A method for removing hydrocarbon impurities from acetic acid is disclosed. The method comprises extracting acetic acid with a hydrophilic imidazolium salt. The imidazolium salt preferably has the general structure of wherein X Θ is a counter ion and R 1 , R 2 , R 3 , R 4 , and R 5 are independently selected from the group consisting of C 1 -C 6 hydrocarbon substitutes. The method is useful for removing hydrocarbon impurities from the alkane distillation bottoms stream of a methanol carbonylation process.

Claims (6)

1. A method for removing a hydrocarbon impurity from acetic acid, said method comprising extracting acetic acid with a hydrophilic imidazolium salt, wherein the imidazolium salt has the general structure:

wherein X Θ is a counter ion and R 1 , R 2 , R 3 , R 4 and R 5 are independently selected from the group consisting of hydrogen and C 1 -C 6 hydrocarbon substituents.

2. The method of claim 1 , wherein X Θ is a halide.

3. The method of claim 1 , wherein X Θ is selected from the group consisting of iodide and chloride.

4. The method of claim 1 , wherein R 1 , R 2 , R 3 , R 4 , and R 5 are independently selected from the group consisting of hydrogen and C 1 -C 4 hydrocarbon substituents.

5. The method of claim 1 , wherein the acetic acid is an alkane distillation bottoms stream from a methanol carbonylation.

Assignments (15)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 16, 2014
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: LYONDELLBASELL ACETYLS, LLC
Reel/Frame 033182/0019 →
RELEASE OF SECURITY INTEREST Recorded Jan 23, 2014
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 032137/0156 →
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: BANK OF AMERICA, N.A.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 032138/0134 →
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: CITIBANK, N.A.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 032125/0296 →
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 7, 2010
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 024342/0801 →
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: 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 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 7, 2008
From: HALLINAN, NOEL C.; SALISBURY, BRIAN A.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 020967/0252 →