Linear, substantially water-insoluble ammonium polyphosphates an

Details Linear, substantially water-insoluble ammonium polyphosphates an Linear, substantially water-insoluble ammonium polyphosphates an

1983-02-08

1985-04-16

Doll, John

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423315, C01B 2530

Patent

active

045115460

ABSTRACT:
The disclosure relates to a process for making linear, substantially water-insoluble ammonium polyphosphates of the general formula (NH.sub.4 PO.sub.3).sub.10-1000 by heating and continuously mixing phosphorus pentoxide and ammonium orthophosphate in the presence of ammonia and tempering the resulting reaction product over a period of several hours at 200.degree. to 400.degree. C. in the presence of ammonia. To this end, the phosphorus pentoxide and ammonium orthophosphate are subjected at 50.degree. to 150.degree. C. to the following successive operations which provide

REFERENCES:
patent: 3333921 (1967-08-01), Knollmueller
patent: 3723074 (1973-03-01), Sears et al.
patent: 3978195 (1976-08-01), Schrodter et al.
patent: 4396586 (1983-08-01), Maurer et al.

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