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2 064 933

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C1

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IPC

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Application

93055762/03, 1993-12-14

(22)

Actual filing date

1993-12-14

(45)

Published

1996-08-10

(72)

Inventor

Savel'Ev N.I.Savkina L.A.Zharikov L.K.Militsin I.A.Shkuro V.G.

(73)

Holder

Cheboksarskoe Proizvodstvennoe Ob"Edinenie

METHOD OF SYNTHESIS OF REAGENT-COLLECTING AGENT BASED ON HYDROXYALKYLIDENE DIPHOSPHONIC ACIDS FOR NONSULFIDE ORE FLOTATION Russian patent published in 1996 - IPC

Abstract RU 2064933 C1

FIELD: minerals concentration, ore flotation. SUBSTANCE: mixture of carboxylic acids with 6-18 carbon atoms reacts with phosphorus trichloride at 120-150 C and hydrolysis of obtained reaction mass is carried out at 80-110 C. Phosphorous acid is added additionally as initial reagent. Mole ratio of phosphorous acid, phosphorus trichloride and carboxylic acids mixture is from 1.0:0.5:1.0 to 1.3:0.8:1.0. Phosphorous acid obtained by hydrolysis of phosphorus trichloride with hydrochloric acid or hydrolysis of vat residue in dimethylphosphite production is used. EFFECT: improved method of synthesis. 3 cl

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RU 2 064 933 C1

Authors

Savel'Ev N.I.

Savkina L.A.

Zharikov L.K.

Militsin I.A.

Shkuro V.G.

Dates

1996-08-10—Published

1993-12-14—Filed

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