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. 02, 1995
Filed:
Oct. 18, 1993
Applicant:
Inventors:
Dominique Pareau, Verrieres le Buisson, FR;
Andre Chesne, Le Vesinet, FR;
Gerard Durand, Le Pecq, FR;
Michel DeRubercy, Le Vesinet, FR;
Assignee:
Societe Generale Pour les Techniques Nouvelles, SGN, Saint Quentin en Yvelines, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C07C / ;
U.S. Cl.
CPC ...
423387 ; 423395 ; 423398 ; 562609 ;
Abstract
The present invention relates to a process for the continuous conversion of one hydroxylamine salt to another hydroxylamine salt, said process involving a countercurrent liquid-liquid extraction followed by a countercurrent liquid-liquid re-extraction. Characteristically, the extractant is used in the extraction step in the salified form and in the acid form.