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.:
Date of Patent:
May. 24, 2005
Filed:
Jan. 14, 2003
Applicants:
Scott C. Jackson, Wilmington, DE (US);
Ronald J. Mckinney, Wilmington, DE (US);
Inventors:
Scott C. Jackson, Wilmington, DE (US);
Ronald J. McKinney, Wilmington, DE (US);
Assignee:
Invista North America S.A.R.L., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F015/04 ; B01J031/00 ; C07C255/00 ;
U.S. Cl.
CPC ...
Abstract
A process for preparing a hydrocyanation catalyst comprising contacting a bidentate phosphorous-containing ligand with nickel chloride in the presence of a nitrile solvent and a reducing metal which is more electropositive than nickel the nickel chloride being introduced as an aqueous solution and the water being removed concurrently with the reduction reaction by azeotropic distillation.