Phosphohemihydrate process for purification of gypsum

Details Phosphohemihydrate process for purification of gypsum Phosphohemihydrate process for purification of gypsum

1982-06-29

1984-01-03

Padgett, Benjamin R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423 2, 423 11, 423167, 423319, 423321R, 423555, 423 18, 423 20, 106110, C01F 1146, C01F 1300, C01B 2516, G21F 928

Patent

active

044241968

ABSTRACT:
A wet process for producing phosphoric acid and phosphohemihydrate by acidulation of phosphate rock. A strong phosphoric acid is obtained with concomitant production of an improved calcium sulfate that is extremely low in radioactivity by operation in Region II for shorter time so as to produce small sized hemihydrate particles, then hydration of a substantial proportion but less than all of the hemihydrate to coarse gypsum substantially free of radioactivity in a dilute acidic aqueous slurry at a temperature and P.sub.2 O.sub.5 concentration selected so as to be within Region I of FIG. 1 and having a substantial weight proportion of coarser gypsum particles that are substantially free of radioactivity.

REFERENCES:
patent: 3951675 (1976-04-01), Krempff
patent: 4146568 (1979-03-01), Lange, Jr.
patent: 4282192 (1981-08-01), Larson
patent: 4311677 (1982-01-01), Gerunda et al.

Affiliated with

Also associated with

Rating

Phosphohemihydrate process for purification of gypsum does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1031591