"A CONTINUOUS PROCESS FOR PREPARING AN ESSENTIALLY ANHYDROUS MIXTURE"

Application 467/DEL/2001 published 2007-01-19, filed 2001-04-04
A continuous process for preparing an essentially anhydrous mixture comprising adipic acid and hexamethylene diamine in a 75-85:15-25 weight ratio comprising the steps of heating a heat stable liquid to 8OOC; adding solid adipic acid; agitating at 80°C until a solution is obtained; adding hexamethylene diamine to reach the desired 75-85:15-25 by weight adipic acid:hexamethylene diamine ratio; heating the mixture to 120°C to 135°C, with agitation, while allowing any water present to evaporate to form an essentially anhydrous molten acid-rich mixture comprising 75-85:15-25 by weight adipic acid: hexamethylene diamine, and feeding adipic acid and hexamethylene diamine in an 75-85:15-25 ratio to the molten acid rich mixture at the same rate that molten acid-rich feed is withdrawn.

Applicant

1)E.I. DU PONT DE NEMOURS AND COMPANY
:MANUFACTURE OF WILMINGTON, DELAWARE, USA U.S.A.

Inventor

1)ANN MARION BREARLEY 2)JAMES JOSEPH LANG 3)ERNEST KEITH ANDREW MARCHILDON

International Info

Classification: C07C 27/00

Priority Information

344,804 U.S.A. 1994-11-23