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Application

96117394/04, 1996-08-23

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Actual filing date

1996-08-23

(45)

Published

1999-03-20

(72)

Inventor

Kriven'Ko A.P.Zapara A.G.Morozova N.A.

(73)

Holder

Kriven'Ko Adel' PavlovnaZapara Aleksandr GennadievichMorozova Nadezhda AndreevnaNauchno-Issledovatel'Skij Institut Khimii Pri Saratovskom Gosudarstvennom Universitete Im.N.G.Chernyshevskogo

PROCESS FOR PREPARING 1,4-DIPHENYL-3-ANILIDENE-5-(H)- 1,2,4-TRIAZOLE (NITRON) Russian patent published in 1999 - IPC

Abstract RU 2127727 C1

FIELD: chemical industry. SUBSTANCE: 1,4-diphenyl-3-anilidene is well known analytical reagent for weight determination of nitrate, perchlorate, tungstate and ruthenate anions. The process for preparing nitron reagent is improved by decreasing temperature conditions of process stage 2 to 28-31 C as compared with 50 C in the prototype process, replacing solvents and developing process for recovery of the desired product from reaction mixture. EFFECT: increased yield of, improved process selectivity and smaller amounts of solvents used.

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RU 2 127 727 C1

Authors

Kriven'Ko A.P.

Zapara A.G.

Morozova N.A.

Dates

1999-03-20—Published

1996-08-23—Filed

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