Method to improve yields of sodium hypophosphite

Details Method to improve yields of sodium hypophosphite Method to improve yields of sodium hypophosphite

1984-01-13

1985-11-12

Doll, John

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 1516

Patent

active

045527377

ABSTRACT:
A process of producing sodium hypophosphite (Na.sub.2 H.sub.2 PO.sub.2) is disclosed wherein the yield of the product is increased. The process comprises increasing the NaOH/P.sub.4 ratio above stoichiometric quantity to from about 2.4 to about 3.0 while maintaining a Ca(OH).sub.2 /P.sub.4 ratio of above about 1.21 in the reaction wherein phosphorus, sodium hydroxide, calcium, hydroxide and water are reacted to produce sodium hypophosphite. The invention further comprises a corresponding increase in dilution (H.sub.2 O/P.sub.4) to from about 38 to about 60.

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