The Exploratory Research Of Relations Between The Degree Of Viscosity And Mol.Wt And The Hydrolysis Reaction Has An Effection On Synthesis Of Retanning Agent

This article mainly about chrome shavings as the raw material, we do have a choice to chrome shavings in graft copolymerization's condition, applying the composite organic acid to deal with the chrome shavings by hydrolysis, By different hydrolytic time, hydrolytic temperature and different pH ,we have prepared twenty-seven samples . By proceeding the analysis and detection to this 27 samples We find that the lowest temperature of hydrolysis reaction can't be lower than 80 ℃ , hydrolysis time can't less than 7 hours. For acquiring the homogeneous numerator dimension and appropriate retanning agent, hydrolytic temperature should be at lest 95℃, as far as possible long hydrolytic time with lower organic acid dosage.Through analyzing L-series modified protein retanning agent's C—ηsp/C curve ,we can get a conclusion that tan conglutination along with solvent thickness different has three distinctness extent. After discussing and spurning some irrationality point and extent, we have sum up, neaten, educed and quoted by using Huggins equation, Markhouwink equation a conclusion --- approximately get relation of formula, at the same time We compute another several molecular weight for retanning agent.