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2 135 544

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Application

98107435/04, 1998-04-21

(22)

Actual filing date

1998-04-21

(45)

Published

1999-08-27

(72)

Inventor

Kljakin G.F.Ershenko N.A.Filatova M.N.Shvarts B.S.

(73)

Holder

Novocherkasskij Gosudarstvennyj Tekhnicheskij Universitet

METHOD OF PREPARING BITUMEN Russian patent published in 1999 - IPC

Abstract RU 2135544 C1

FIELD: building materials industry, more particularly preparation of building petroleum bitumens. SUBSTANCE: method comprises heating tar containing 5-15 wt % of additive which comprises, wt %: ammonium bichromate 1.0-4.0; sodium chloride, 1.0-4.0; and ammonium nitrate, the balance. EFFECT: reduced amount of toxic discharges and simplified technological process. 2 ex

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RU 2 135 544 C1

Authors

Kljakin G.F.

Ershenko N.A.

Filatova M.N.

Shvarts B.S.

Dates

1999-08-27—Published

1998-04-21—Filed

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