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Current content: 157 337 350 patent documents

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219 431 new documents added

1 247 852 documents amended

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EP 0238958 B1 19910612 - METHOD FOR THE PURIFICATION OF TETRAACETYLETHYLENEDIAMINE

Title (en)

METHOD FOR THE PURIFICATION OF TETRAACETYLETHYLENEDIAMINE

Publication

EP 0238958 B1 19910612 (DE)

Application

EP 87103737 A 19870314

Priority

DE 3609735 A 19860322

Abstract (en)

[origin: EP0238958A2] Crude tetraacetylethylenediamine (TAED), such as obtained in crystalline form during synthesis, is converted by successive washing with acetic acid and water and subsequent drying into a colourless and odourless form, such as is required for use in detergents and bleaching agents.

IPC 1-7

C07C 229/06; C11D 3/32

IPC 8 full level

C07C 229/06 (2006.01); C11D 3/32 (2006.01)

CPC (source: EP)

C11D 3/32 (2013.01)

Designated contracting state (EPC)

AT BE CH DE ES FR GB IT LI LU NL SE

DOCDB simple family (publication)

EP 0238958 A2 19870930; EP 0238958 A3 19880817; EP 0238958 B1 19910612; AT E64410 T1 19910615; DE 3609735 A1 19870924; DE 3770666 D1 19910718; ES 2022182 B3 19911201; IE 59879 B1 19940420; IE 870734 L 19870922

DOCDB simple family (application)

EP 87103737 A 19870314; AT 87103737 T 19870314; DE 3609735 A 19860322; DE 3770666 T 19870314; ES 87103737 T 19870314; IE 73487 A 19870320