Circulation process for the production of aliphatic and...

Details Circulation process for the production of aliphatic and... Circulation process for the production of aliphatic and...

C - Chemistry, Metallurgy

07

C

260/456.3

C07C 263/04 (2006.01) C07C 265/14 (2006.01)

Patent

CA 1318683

ABSTRACT OF THE DISCLOSURE A circulation process for the production of (cyclo)aliphatic diisocyanates, in which the biscarbamate is produced from diamines, by-products from the thermal cracking, urea, and alcohol in the presence of N-unsubstituted carbamates and dialkyl carbonates, and with separation of NH3; the subsequent cracking of the biscarbamate is carried out in the liquid phase without solvent; the diisocyanate and alcohol are condensed; the diisocyanate is subjected to a purifying distillation; and a portion of the cracking reaction mixture is discharged with the by-products formed and recycled to the biscarbamate production step after prior reaction with the crude alcohol formed, effectively utilizes the by-products formed in the cracking step and is an industrially practical and economical process.

608074

Affiliated with

Also associated with

Rating

Circulation process for the production of aliphatic and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circulation process for the production of aliphatic and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circulation process for the production of aliphatic and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1297002