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Etherification of bark extracts and condensed tannins

机译:树皮提取物和单宁浓缩物的醚化

摘要

Polyphenolic extracts of coniferous tree barks and condensed tannins from wood such as quebracho extracts are etherified by reaction at elevated temperature in the presence of an alkaline catalyst with an olefin containing a double bond-activated carbonyl group having the structure ##EQU1## A particularly effective olefin is acrolein. The reaction products are produced in high yield, are water or alkali soluble and act among other uses as good dispersants.
机译:针叶树皮的多酚提取物和木材的浓缩单宁酸(例如quebracho提取物)在碱性催化剂的存在下,通过在高温下与含有双键活化羰基的烯烃进行反应,使其醚化,该烯烃的结构特别是## EQU1 ##有效的烯烃是丙烯醛。反应产物以高收率生产,可溶于水或碱,并在其他用途​​中用作良好的分散剂。

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