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2 010 792

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Application

5027128/04, 1992-02-12

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Actual filing date

1992-02-12

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Published

1994-04-15

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Inventor

Vulakh E.L.Jur'Ev V.P.Lopatin B.P.Vavilov N.I.Shishkin V.A.Reshetnikov V.P.Frejdlin Eh.G.Lakomova N.A.Savinov N.G.Petrakov V.N.

(73)

Holder

Aktsionernoe Obshchestvo I Proektnyj Institut Monomerov S Opytnym Zavodom"Gosudarstvennoe Predprijatie Im.Ja.M.Sverdlova"

METHOD OF 4.4′-DIAMINODIPHENYLSULFONE SYNTHESIS Russian patent published in 1994 - IPC

Abstract RU 2010792 C1

FIELD: organic chemistry. SUBSTANCE: product: 4.4′-diaminodiphenylsulfone, gross-formula is C6H12N2O2S, m. p. is 177-177.6 C, yield is 96% , content of impurities is 0.05 wt. -% . Reagent 1: 4.4′-dichlorodiphenylsulfone. Reagent 2: 15-24% aqueous solution of ammonia. Reaction condition: increased temperature and pressure: 270-280 C and 95-140 atm at concentration of initial sulfone in suspension 3-40 wt. -% . EFFECT: improved method of synthesis. 1 tbl

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RU 2 010 792 C1

Authors

Vulakh E.L.

Jur'Ev V.P.

Lopatin B.P.

Vavilov N.I.

Shishkin V.A.

Reshetnikov V.P.

Frejdlin Eh.G.

Lakomova N.A.

Savinov N.G.

Petrakov V.N.

Dates

1994-04-15—Published

1992-02-12—Filed

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