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. |
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[edit] Please, Could you rename this page as Lignosulfonates
I would recomment to rename this good page as Lignosulfonates in place of My files.
[edit] Comments moved from article page
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)
