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2 234 494

(13)

(51)

IPC

(21) (22)

Application

2002132172/04, 2002-11-28

(24)

Start date

2002-11-28

(22)

Actual filing date

2002-11-28

(45)

Published

2004-08-20

(72)

Inventor

Afonin E.G.L'Vovskij V.M.

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Nauchno-Issledovatel'Skij Institut Telemekhanicheskikh Ustrojstv"

METHOD OF PRODUCTION OF CUPRIC OXALATE (II) Russian patent published in 2004 - IPC

Abstract RU 2234494 C1

FIELD: updating of cupric oxalate production method in manufacture of high-temperature superconductors for copper catalysts.

SUBSTANCE: proposed method includes preparation of reaction solution by mixing oxalic acid solution or soluble oxalate and copper (II) solution, crystallization of product and separation of sediment from solution; used as copper (II) solution is waste solution of pickling printed circuit boards which contains no ferric chloride or chromate; pH of reaction solution is brought to (-0.5)-5/0.

EFFECT: low cost of product; high yield at simultaneous utilization of toxic waste.

11 cl, 8 ex

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RU 2 234 494 C1

Authors

Afonin E.G.

L'Vovskij V.M.

Dates

2004-08-20—Published

2002-11-28—Filed