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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 7863209 B1

PDFFull Text
Date of Patent:
Jan. 04, 2011

Filed:

Jun. 16, 2004

Methods for recycling catalyst compositions for aromatic ring halogenation

Applicants:

Balakrishnan Ganesan, Maharashtra, IN;

Pradeep Jeevaji Nadkarni, Karnataka, IN;

Robert Edgar Colborn, Niskayuna, NY (US);

Dan Hancu, Clifton Park, NY (US);

Inventors:

Balakrishnan Ganesan, Maharashtra, IN;

Pradeep Jeevaji Nadkarni, Karnataka, IN;

Robert Edgar Colborn, Niskayuna, NY (US);

Dan Hancu, Clifton Park, NY (US);

Assignee:

Sabic Innovative Plastics IP B.V., , NL;

Attorney:

Cantor Colburn LLP

Primary Examiner:

Steven Bos

Assistant Examiner:

Anthony J Zimmer

Int. Cl.
CPC ...
B01J 38/42 (2006.01); B01J 38/50 (2006.01); B01J 31/00 (2006.01); C07C 25/00 (2006.01); C01G 3/04 (2006.01); C01G 5/00 (2006.01); C01G 7/00 (2006.01); C22B 3/00 (2006.01); C22B 11/06 (2006.01); C01G 49/10 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method for recovering and reusing a ring-halogenation catalyst comprises: (A) contacting an aromatic compound with chlorine or bromine in the presence of a catalyst composition, where the catalyst composition comprises at least one salt comprising a Group 4-13 metal, a lanthanide metal, or an actinide metal; and at least one organic counterion derived from an organic acid having a pKa relative to water of 0 or greater; and at least one organic sulfur compound; to form a first product mixture comprising a monochloro or a monobromo aromatic compound and a Group 4-13 metal halide, a lanthanide metal halide or an actinide metal halide; (B) separating the metal halide from the first product mixture; and (C) contacting at least a portion of the metal halide and an aromatic compound with chlorine or bromine, and at least one organic sulfur compound; to form a second product mixture comprising a monochloro or a monobromo aromatic compound and a Group 4-13 metal halide, a lanthanide metal halide or an actinide metal halide.ving a pKa relative to water of 0 or greater; and at least one organic sulfur compound.

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