Manufacture of purified diammonium phosphate

Details Manufacture of purified diammonium phosphate Manufacture of purified diammonium phosphate

1979-11-06

1980-12-16

Langel, Wayne A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 1516

Patent

active

042397391

ABSTRACT:
Purified diammonium phosphate is produced by neutralizing relatively pure melamine orthophosphate, prepared from wet-process phosphoric acid, with ammonia in a hot solution of diammonium phosphate to give a slurry of melamine in concentrated diammonium phosphate solution. The liberated melamine is virtually insoluble in concentrated diammonium phosphate solutions; it is filtered from the hot mixture, washed, and recycled to produce more melamine phosphate by reaction with wet-process phosphoric acid. The hot, concentrated diammonium phosphate filtrate is cooled to precipitate purified diammonium phosphate crystals. The product is separated from its mother liquor by filtration, and the resulting filtrate is recycled to the reactor. The small amount of impurities introduced with the melamine phosphate are removed partly with the liberated melamine and partly by centrifugation of the diammonium phosphate solution. The only starting materials for the process are phosphoric acid and ammonia.

REFERENCES:
patent: 3920796 (1975-11-01), Sheridan

Affiliated with

Also associated with

Rating

Manufacture of purified diammonium phosphate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manufacture of purified diammonium phosphate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacture of purified diammonium phosphate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-607681