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US 4,865,616 AGranted
Process and plant to carbonize vegetable impurities in textile woolen manufactured articles
AssigneeSperotto Rimar S.p.A.
InventorGino D. Vecchia
Life of this patent
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Abstract
A process and plant to carbonize vegetable impurities in woolen manufactured articles, which makes possible a better and uniform removal of the impurities to be obtained, with a considerable reduction in cost, at the same time avoiding wash water waste and environmental atmospheric pollution, by means of a reduced number of treatment steps.
Claims8
A process of carbonizing vegetable impurities present in woolen textile manufactured articles, comprising:
- treating the textile article with chlorinated hydrocarbon solvent, to remove lubricating substances present in the article and to obtain a deep impregnation of the fibers of the article with said chlorinated solvent;
- treating the textile article thus impregnated with said chlorinated solvent, with an aqueous solution of sulfuric acid, to obtain a surface impregnation of the fiber of the article with said sulfuric acid solution, and effecting thermal treatment of the article to evaporate the chlorinated solvent and water therefrom, and obtain true carbonization of said vegetable impurities.
Dependencies are inferred from the claim text.