Delignification and bleaching process for chemical paper pulp

Details Delignification and bleaching process for chemical paper pulp Delignification and bleaching process for chemical paper pulp

D - Textiles, Paper

21

C

D21C 9/16 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2200486

The invention consists of a delignification and bleaching process for chemical paper pulp comprising one or more hydrogen peroxide treatments at a temperature exceeding 100 C and at high pressure in the presence of a polymer and an A compound of potassium hydroxide, sodium hydroxide or carbonates of an alkaline metal or earth. The process yields a well bleached pulp which nonetheless remains highly polymerized.

L'invention concerne un procédé de délignification et de blanchiment de pâtes à papier chimiques comprenant une ou plusieurs étape(s) de traitement par le peroxyde d'hydrogène, à une température supérieure à 100~C et sous pression élevée en présence d'un polymère et d'un composé A choisi parmi l'hydroxyde de potassium, l'hydroxyde de sodium et les carbonates d'un métal alcalin ou alcalino-terreux. Ce procédé permet d'obtenir une pâte fortement blanchie ayant conservé un bon degré de polymérisation.

Affiliated with

Also associated with

Rating

Delignification and bleaching process for chemical paper pulp does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Delignification and bleaching process for chemical paper pulp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delignification and bleaching process for chemical paper pulp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-2058109