Talk:Lignosulfonates

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A fact from Lignosulfonates appeared on Wikipedia's Main Page in the Did you know column on 20 October 2007. The text of the entry was as follows:

Did you know... that lignosulfonates, wood pulp byproducts, are used to make concrete, tanned leather, and even artificial vanillin?

A record of the entry may be seen at Wikipedia:Recent additions/2007/October.

Wikipedia

Lignin.org is defunct

Latest comment: 9 years ago1 comment1 person in discussion

All the references to lignin.org are to a domain seller redirect page. — Preceding unsigned comment added by 68.35.244.209 (talk) 01:48, 17 August 2015 (UTC)Reply

Please, Could you rename this page as Lignosulfonates

I would recomment to rename this good page as Lignosulfonates in place of My files.

Comments moved from article page

Latest comment: 17 years ago1 comment1 person in discussion

This comment was left on the article page. I've moved it here because it may cintain information that a knowledgeable editor can use to improve the article. but it's beyond me.(-- SH):

THE 'LIQUOR' GENRATED IN SULFITE PULPING IS NOT CALLED 'BLACK LIQUOR', IT IS USUALLY CALLED RED LIQUOR, BECAUSE OF IT'S REDDISH COLOUR.

ALKALINE (E.G. THE KRAFT PROCESS) PULPING, WHICH PRODUCES A DEPOLYMERIZED LIGNIN ("KRAFT LIGNIN") DOES NOT PRODUCE LIGNIN SULFONATES. THIS IS A VERY COMMON ERROR IN PULPING TERMINOLOGY.

KRAFT PULPING PRODUCES BLACK LIQUOR WHICH CONTAINS DEGRADED "KRAFT" LIGNIN (SULFATE LIGNIN) SULFITE PULPING PRODUCES RED LIQUOR WHICH CONTAINS LIGNIN SULFONATES (SULFITE LIGNIN)

The following Lignin Intstitute web page http://www.lignin.org/whatis.html

gives the following summary of the differences :

== Commercial lignin is currently produced as a co-product of the paper industry, separated from trees by a chemical pulping process. Lignosulfonates (also called lignin sulfonates and sulfite lignins) are products of sulfite pulping. Kraft lignins (also called sulfate lignins) are obtained from the kraft pulping process. Other delignification technologies use an organic solvent or a high pressure steam treatment to remove lignins from plants.

Because lignins are very complex natural polymers with many random couplings, the exact chemical structure is not known. Physical and chemical properties differ depending on the extraction technology. For example, lignosulfonates are hydrophilic (will dissolve in water) and kraft lignins are hydrophobic (will not dissolve in water). ==

--199.221.7.30 14:25, 14 March 2007 (UTC)Reply

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