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:
Apr. 10, 2012
Filed:
Feb. 28, 2008
Applicants:
Alfred Oftring, Bad Dürkheim, DE;
Kirsten Dahmen, Freinsheim, DE;
Thilo Hahn, Kirchheimbolanden, DE;
Randolf Hugo, Dirmstein, DE;
Katrin Baumann, Mannheim, DE;
Johann-peter Melder, Böhl-Iggelheim, DE;
Inventors:
Alfred Oftring, Bad Dürkheim, DE;
Kirsten Dahmen, Freinsheim, DE;
Thilo Hahn, Kirchheimbolanden, DE;
Randolf Hugo, Dirmstein, DE;
Katrin Baumann, Mannheim, DE;
Johann-Peter Melder, Böhl-Iggelheim, DE;
Assignee:
BASF SE, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 209/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a process for preparing an amino nitrile mixture comprising aminoacetonitrile (AAN) and from 5 to 70% by weight of iminodiacetonitrile (IDAN), which comprises heating crude AAN which is largely free of formaldehyde cyanohydrin (FACH-free) at a temperature of from 50 to 150° C.