中文摘要：

采用透析的方法将铜电解液中相对分子质量大于3500的明胶进行分离,以二喹啉甲酸（BCA）法测定所得明胶质量浓度,研究了硫酸质量浓度和温度对铜电解液中明胶分解规律的影响.铜电解液中Cu2＋基本不影响明胶的稳定性;电解液温度升高和硫酸质量浓度增大,都加剧了明胶的分解.在相同温度下,硫酸质量浓度在150~180 g·L-1范围内每增加15 g·L-1,明胶分解反应速率常数增大约1.2倍;而在相同的硫酸质量浓度下,温度在55~70℃范围内每增加5℃,明胶分解反应速率常数增大约1.5倍.对于铜电解生产,电解液中硫酸质量浓度150~180 g·L-1以及温度60~65℃,可推算出电解液在电解槽中停留3~4 h,明胶的分解率达50%~80%;电解液经过完整的一周循环约需6 h,明胶的分解率可达到70%~90%.

英文摘要：

Dialysis was utilized to separate gelatin whose relative molecular mass is over 3500 from a simulated copper electrolyte,and the concentration of separated gelatin was determined with a bicinchoninic acid（ BCA） method. The impact of H2SO4 concentration and temperature on gelatin degradation was investigated. It was found that Cu2 ＋hardly affected the stability of gelatin. Increases in electrolyte temperature and H2SO4 concentration exacerbated gelatin degradation. For constant temperature,when the H2SO4 concentration increased by 15 g·L-1in the range of 150 to 180 g·L-1,the reaction rate constant of gelatin degradation enlarged by 1. 2times. For constant H2SO4 concentration,raising the temperature by 5 ℃ in the range of 55 to 70 ℃ increased the reaction rate constant of gelatin degradation by 1. 5 times. For copper electrolysis production,when the concentration of H2SO4 in the copper electrolyte was 150 to 180 g·L-1and the temperature was 60 to 65 ℃,it could be estimated that the residence time of the electrolyte in the electrolytic cell was 3 to 4 h and the gelatin degradation rate in the electrolyte reached to 50% to 80%. A complete cycle of the electrolyte in the copper electrolysis system took about 6 h,and at this moment the gelatin degradation rate in the electrolyte reached to 70% to90%.