Multi-functional-group high-absorption chrome tanning auxiliary agent as well as preparation method and application thereof

The invention discloses a multi-functional-group high-absorption chrome tanning auxiliary agent and a preparation method and application thereof. The structure of the auxiliary agent is a polycarboxylic acid compound containing ketone carbonyl. The invention further discloses a preparation method and application of the high-absorption chrome tanning auxiliary. According to the invention, six-membered carboxyl can be introduced on leather collagen through ketone carbonyl, so that the number of collagen side chain carboxyl is increased, coordination groups of chromium are multiplied, the absorption of trivalent chromium is remarkably improved, the concentration of trivalent chromium in chrome tanning wastewater is reduced, the environmental pollution of the leather industry is reduced, and clean production of the leather industry is promoted. The method is easy to operate, and a new thought is provided for research of the high-absorption chrome tanning auxiliary agent. 本发明公开了一种多官能团高吸收铬鞣助剂及其制备方法与应用，该助剂结构为含酮羰基的多元