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用有机物还原的铬鞣液往往具有优良的鞣革性能,一般认为这是由于此时溶液中存在掩蔽了的铬络合物,因此,在无机物还原的铬鞣液中,有时加入有机酸及其盐,以提高鞣革性能。为了解此时溶液的组成,竹之内一昭等也将0.1当量/Cr的甲酸盐、乙酸盐、草酸盐和乳酸盐加入氯化铬(Ⅲ)溶液,制备出了各种掩蔽了的Cr(Ⅲ)络合物,并通过离子交换色谱来分离它们,然后测定了所分离的这些络合物的晶体的红外光谱,他
Chromium tanning with organic reduction tends to have excellent tanning properties, which is generally believed to be due to the presence of masked chromium complexes in the solution at this point. Therefore, inorganic chrome tanning agents sometimes contain organic acids and Its salt to improve tanning performance. In order to understand the composition of the solution at this time, Takeuchi Akashima et al. Also prepared various kinds of masks by adding 0.1 equivalent / Cr formate, acetate, oxalate and lactate to a chromium (III) chloride solution Cr (III) complexes were isolated and separated by ion-exchange chromatography, and then the infrared spectra of the crystals of these complexes isolated were measured, and he