Preparation and application of high-absorption chrome tanning auxiliary agent containing ketocarboxylic acid structure

The invention relates to an organic compound containing a ketocarboxylic acid structure and having a structural formula (I), and the organic compound is applied to a leather high-absorption chrome tanning process. The invention discloses a preparation method and application of a high-absorption chrome tanning auxiliary agent containing a ketocarboxylic acid structure. The high-absorption chrome tanning auxiliary agent containing the ketocarboxylic acid structure contains three or more active groups such as keto carbonyl and carboxyl, can realize multi-point cross-linking modification of collagen, increases the number of carboxyl on a side chain of the collagen, increases coordination sites with trivalent chromium, increases the binding amount of trivalent chromium in leather, realizes highabsorption of a chrome tanning agent, and reduces emission of chromium in waste liquid. 本发明涉及一种具有结构式(I)的含酮羧酸结构的有机化合物，并应用于皮革高吸收铬鞣工序。本发明公开含酮羧酸结构的高吸收铬鞣助剂的制备方法和应用。本发明的含酮羧酸结构的高吸收铬鞣助剂含有三个以上的酮羰基和羧基等活性基团，能实现胶原的多点位交联改性，增加胶原侧链羧基数量，增加与