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2 134 655

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IPC

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Application

98109207/25, 1998-05-13

(22)

Actual filing date

1998-05-13

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Published

1999-08-20

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Inventor

(73)

Holder

Valoven' Vadim Ivanovich

TETRASODIUM PYROPHOSPHATE PRODUCTION METHOD Russian patent published in 1999 - IPC

Abstract RU 2134655 C1

FIELD: production of inorganic compounds. SUBSTANCE: method consists in treating aqueous solution of sodium tripolyphosphate with sodium hydroxide at ratio of the latter to the former 0.7-0.9 and temperature 70-90 C. Quality of product is thus improved because of reduced level of orthophosphates (0.05-0.1%). Product is also practically devoid of polymeric forms. EFFECT: improved quality of product and reduced power consumption. 2 tbl

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RU 2 134 655 C1

Authors

Dates

1999-08-20—Published

1998-05-13—Filed

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