An integrated process for the production of 2,6-naphthalene...

C - Chemistry – Metallurgy – 07 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07C 51/265 (2006.01) B01J 27/232 (2006.01) C07C 51/02 (2006.01) C07C 51/15 (2006.01) C07C 51/41 (2006.01) C07C 51/42 (2006.01) C07C 51/43 (2006.01) C07C 51/44 (2006.01) C07C 51/47 (2006.01) C07C 51/487 (2006.01) C07C 63/36 (2006.01) C07C 63/38 (2006.01) C08G 63/189 (2006.01)

Patent

CA 2383337

Disclosed is an integrated process for producing 2,6-naphthalene dicarboxylic acid comprising oxidizing a methylnaphthalene feedstock, hydrodebrominating the crude naphthoic acid product under conditions different from any work known in the art, forming a potassium salt of the acid; disproportionating the potassium salt to produce 2,6 potassium salts of NDA; selectively precipitating K2NDA; selectively precipitating the monopotassium salt of 2,6- NDA(KHNDA); disproportionating the KHNDA into 2,6-NDA and K2NDA; further reacting the 2,6-NDA in a pipe reactor; and drying the product 2,6-NDA by conventional means or directly slurrying directly into a PEN process. The process can tolerate impurities in the economical methylnaphthalene feed and the resulting 2,6-NDA is of high quality with <50 ppm potassium.

L'invention concerne un procédé intégré de production d'acide 2,6-naphtalène-dicarboxylique qui comprend les étapes suivantes : oxydation d'une charge de méthylnaphtalène, hydrodébromation du produit d'acide naphtoïque dans des conditions différentes de celles de toute technique existante; formation d'un sel de potassium à partir de cet acide; dismutation du sel de potassium pour donner des sels de 2,6 potassium de l'acide naphtalène-dicarboxylique (NDA); précipitation sélective de K¿2?NDA; précipitation sélective du sel de monopotassium de 2,6-NDA(KHNDA); dismutation de KHNDA en 2,6-NDA et K2NDA; réaction supplémentaire de 2,6-NDA dans un réacteur tubulaire; et séchage du produit 2,6-NDA selon une technique conventionnelle ou mise en suspension épaisse directe dans un procédé de production de polyéthylène naphtalate. Le procédé décrit tolère les impuretés dans la charge de méthylnaphtalène, qui est économique, et le produit 2,6-NDA résultant est de haute qualité, avec moins de 50 ppm de potassium.

LandOfFree

Say what you really think

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

Rating

An integrated process for the production of 2,6-naphthalene... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with An integrated process for the production of 2,6-naphthalene..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An integrated process for the production of 2,6-naphthalene... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2010588

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