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2 007 388

(13)

(51)

IPC

(21) (22)

Application

4607052/04, 1988-11-21

(22)

Actual filing date

1988-11-21

(45)

Published

1994-02-15

(72)

Inventor

Mikhalkin A.P.Vlasov V.N.Marshalkin V.N.Fomichev A.A.Gorshkova L.V.Kholomjanskij I.Ja.

(73)

Holder

Nauchno-Proizvodstvennoe Tovarishchestvo Pav"

METHOD OF PHOSPHATE ORE FLOTATION AGENT SYNTHESIS Russian patent published in 1994 - IPC

Abstract RU 2007388 C1

FIELD: organic chemistry. SUBSTANCE: product - flotation agent of the general formula RCH(OH)CH₂N(COCH₃)(CH₂)₅COOH, where R - alkyl-C₇-C₁₃; M - H, Na, K. Reagent 1: sodium salt of N-(2-hydroxyalkyl)-(C₇-C₁₃)-6-aminohexanoic acid. Reagent 2: acetic anhydride. Reaction condition: in the medium of benzene, at boiling for 10 h. To obtain salts synthesized acid is treated with NaOH or KOH. EFFECT: improved method of synthesis. 1 tbl

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RU 2 007 388 C1

Authors

Mikhalkin A.P.

Vlasov V.N.

Marshalkin V.N.

Fomichev A.A.

Gorshkova L.V.

Kholomjanskij I.Ja.

Dates

1994-02-15—Published

1988-11-21—Filed