Chemical modification of preformed polybenzimidazole semipermeab

Details Chemical modification of preformed polybenzimidazole semipermeab Chemical modification of preformed polybenzimidazole semipermeab

1982-07-06

1987-01-06

Spear, Frank

Liquid purification or separation

Filter

Material

21050027, 521 27, B01D 1300

Patent

active

046345302

ABSTRACT:
A process for chemically modifying a preformed polybenzimidazole semipermeable membrane is provided. The process comprises the steps of sulfonating the membrane by contacting the membrane at a temperature within the range of 5.degree. C. to 100.degree. C. with a sulfonating agent and heating the membrane in an inert atmosphere at a temperature and for a period of time sufficient to convert the ionic bonds formed in the contacting step to permanent, covalent bonds, thereby providing a covalently bonded sulfonated polybenzimidazole semipermeable membrane. The membrane produced by the process of the present invention exhibits cation selectivity for electrodialysis and electrochemical applications. Other advantages may include increased water flux for reverse osmosis purposes and increased resistance to fouling.

REFERENCES:
patent: 3737042 (1973-06-01), Boom
patent: 3750735 (1973-08-01), Chiang et al.

Affiliated with

Also associated with

Rating

Chemical modification of preformed polybenzimidazole semipermeab does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chemical modification of preformed polybenzimidazole semipermeab, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical modification of preformed polybenzimidazole semipermeab will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-682925