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2 174 150

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IPC

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Application

2001103513/12, 2001-02-08

(24)

Start date

2001-02-08

(22)

Actual filing date

2001-02-08

(45)

Published

2001-09-27

(72)

Inventor

Kochetova S.P.Shimenovich B.S.Zykova N.V.Studenikin S.I.

(73)

Holder

Gosudarstvennoe Unitarnoe Predprijatie Tsentral'Nyj Nauchno-Issledovatel'Skij Institut Kozhevenno-Obuvnoj Promyshlennosti

RAWSTOCK TREATMENT PROCESS Russian patent published in 2001 - IPC

Abstract RU 2174150 C1

FIELD: leather industry. SUBSTANCE: process includes (i) water-soaking in presence of sodium carbonate and organic compound and (ii) liming in aqueous solution of calcium hydroxide, sodium sulfide, and organic compound, the latter being reaction product of lignosulfonate and ethylenediaminetetraacetic acid, reagent being used in amounts 0.5-1.0% (soaking) and 0.5-1.0% (liming) based on the weight of rawstock. EFFECT: improved leather quality and reduced pollution of waste water by organics. 1 tbl, 5 ex

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RU 2 174 150 C1

Authors

Kochetova S.P.

Shimenovich B.S.

Zykova N.V.

Studenikin S.I.

Dates

2001-09-27—Published

2001-02-08—Filed