Process for the preparation of...

C - Chemistry – Metallurgy – 07 – D

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07D 235/20 (2006.01) A61K 8/49 (2006.01) A61Q 17/04 (2006.01) C07D 235/18 (2006.01)

Patent

CA 2430274

The invention relates to a method for producing a phenylene-bis-benzimidazole- tetrasulfonic acid disodium salt which is largely free from impurities. Said method involves reacting o-phenylene diamine with terephthalic acid and chlorosulfonic acid in the presence of strong acids, with a reaction time of 10 to 15 hours.

L'invention concerne un procédé de production d'un sel disodique de l'acide phénylène-bis-benzimidazol-tétrasulfonique, largement dépourvu d'impuretés. Ce procédé consiste à faire réagir de l'o-phénylènediamine avec de l'acide téréphtalique et de l'acide chlorosulfonique, en présence d'acides forts avec un temps de réaction de 10 à 15 heures.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for the preparation of... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFCA-PAI-O-1468804

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.