Process for preparing lignosulfonates

Details Process for preparing lignosulfonates Process for preparing lignosulfonates

1984-04-16

1985-06-04

Phillips, Delbert R.

Chemistry: natural resins or derivatives; peptides or proteins;

Lignins or derivatives

Aldehyde, ketone or ozone reacted with a lignin or lignin...

C07G 100

Patent

active

045213364

ABSTRACT:
Disclosed herein is a process for preparing sulfonated lignins by selectively isolating lignins having molecular weights greater than 5,000 and subsequently reacting the lignin with sodium sulfite and an aldehyde. The resulting sulfonated lignins are useful as dispersants for disperse dyes and vat dyes.

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Sarkanen et al., "Lignins" (1971), 288-289.
Brauns et al., The Chemistry of Lignin, Supplement vol. (1960), pp. 553-555.

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