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Economy chrome tanning process with aldehyde-acids and keto-acids
Economy chrome tanning process with aldehyde-acids and keto-acids
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机译:用醛酸和酮酸进行经济的铬鞣制革工艺
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摘要
Economy chrome tanning process wherein the pelts are pretreated before the tanning with 0.1 to 2% of an aldehyde- or keto-acid, preferably with glyoxylic acid or pyruvic acid, and are then tanned by customary methods. In this pretreatment, which is preferably carried out in the pickle, the tanning requires a chromium supply of only 1.25 to 1. 5% of Cr.sub.2 O.sub. 3 on weight of pelt. Despite this reduced amount of chrome tannin the results obtained are boil-resistant leathers with uniform chromium distribution, excellent color levelness and very good physical properties.
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机译:经济型铬鞣制革工艺,其中,在制革之前先用0.1%至2%的醛酸或酮酸(最好用乙醛酸或丙酮酸)对毛皮进行预处理,然后再通过常规方法进行鞣制。在该预处理中,优选在腌制中进行,鞣制仅需要提供1.25-1.5%的Cr 2 O 2的铬。毛皮重量为3。尽管减少了铬单宁的量,但获得的结果仍是具有均一的铬分布,优异的色度和非常好的物理性能的耐煮皮革。
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