Process for purifying phosphoric acid for electrical...

Details Process for purifying phosphoric acid for electrical... Process for purifying phosphoric acid for electrical...

C - Chemistry, Metallurgy

01

B

23/72

C01B 25/234 (2006.01) C01B 25/237 (2006.01) C01B 25/238 (2006.01)

Patent

CA 1297266

Abstract: PROCESS FOR PURIFYING PHOSPHORIC ACID FOR ELECTRICAL SEMICONDUCTOR USE Phosphoric acid is treated to remove and/or tie up heavy metals and antimony to enable the acid to be used in electrical semiconductor applications by re- acting the acid with hydrogen sulfide and with hy- drogen peroxide in separate treating steps. The hydrogen sulfide precipitates metal sulfides which are separated from the acid, and the hydrogen per- oxide oxidizes dissolved antimony so that it is tied up and does not post-precipitate in the acid after removal of the metal sulfides.

577547

Affiliated with

Also associated with

Rating

Process for purifying phosphoric acid for electrical... 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 purifying phosphoric acid for electrical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for purifying phosphoric acid for electrical... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1191105