工程科学学报，第37卷，第5期：580587,2015年5月 Chinese Journal of Engineering,Vol.37,No.5:580-587,May 2015 DOI:10.13374/j.issn2095-9389.2015.05.007:http://journals.ustb.edu.cn 铜电解液中硫酸质量浓度和温度对明胶分解的影响 李 坚12)区，华一新12)，施哲12》，田国才12》，徐存英2) 1)昆明理工大学治金与能源工程学院，昆明6500932)省部共建复杂有色金属资源清洁利用国家重点实验室，昆明650093 ☒通信作者，E-mail:kgj1010@163.com 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(BC4)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C2·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150~180gL范围内每增加15gL, 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150-180gL以及温度60-65℃，可推算出电解液在电解槽 中停留3~4h,明胶的分解率达50%~80%：电解液经过完整的一周循环约需6h,明胶的分解率可达到70%-90%. 关键词铜：电解：电解液：明胶：分解：分解速率 分类号TF811 Influence of sulfuric acid concentration and temperature on gelatin degradation in copper electrolytes LI Jian,HUA Yi-xin',SHI Zhe,TIAN Guo-cai,XU Cun-ying 1)Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China 2)State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093,China Corresponding author,E-mail:kglj1010@163.com ABSTRACT 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 H,SO,concentra- tion and temperature on gelatin degradation was investigated.It was found that Cu?hardly affected the stability of gelatin.Increases in electrolyte temperature and H2SO,concentration exacerbated gelatin degradation.For constant temperature,when the H2SO,con- centration increased by 15gL in the range of 150 to 180gL,the reaction rate constant of gelatin degradation enlarged by 1.2 times.For constant H2SO concentration,raising the temperature by 5C in the range of 55 to 70C increased the reaction rate con- stant of gelatin degradation by 1.5 times.For copper electrolysis production,when the concentration of HSO,in the copper electrolyte was 150 to 180gLand the temperature was 60 to 65C,it could be estimated that the residence time of the electrolyte in the electro- lytic cell was 3 to 4h 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%to 90%. KEY WORDS copper:electrolysis:electrolytes:gelatin:degradation:degradation rate 明胶或动物胶作为必不可少的添加剂在铜网、铅、锌5、镍刀等有色金属的电解精炼和电解沉 收稿日期：2014-0208 基金项目：国家自然科学基金资助项目(51274108,21263007)：云南省自然科学基金重点资助项目(2011FA009):昆明理工大学2009年科研 基金资助项目(KKZ4200727003)工程科学学报，第 37 卷，第 5 期: 580--587，2015 年 5 月 Chinese Journal of Engineering，Vol． 37，No． 5: 580--587，May 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 05． 007; http: / /journals． ustb． edu． cn 铜电解液中硫酸质量浓度和温度对明胶分解的影响 李 坚1，2) ，华一新1，2) ，施 哲1，2) ，田国才1，2) ，徐存英1，2) 1) 昆明理工大学冶金与能源工程学院，昆明 650093 2) 省部共建复杂有色金属资源清洁利用国家重点实验室，昆明 650093  通信作者，E-mail: kglj1010@ 163． com 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% ． 关键词 铜; 电解; 电解液; 明胶; 分解; 分解速率 分类号 TF811 Influence of sulfuric acid concentration and temperature on gelatin degradation in copper electrolytes LI Jian1，2)  ，HUA Yi-xin1，2) ，SHI Zhe1，2) ，TIAN Guo-cai1，2) ，XU Cun-ying1，2) 1) Faculty of Metallurgical and Energy Engineering，Kunming University of Science and Technology，Kunming 650093，China 2) State Key Laboratory of Complex Nonferrous Metal Ｒesources Clean Utilization，Kunming 650093，China  Corresponding author，E-mail: kglj1010@ 163． com ABSTＲACT 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 H2 SO4 concentra￾tion and temperature on gelatin degradation was investigated． It was found that Cu2 + hardly affected the stability of gelatin． Increases in electrolyte temperature and H2 SO4 concentration exacerbated gelatin degradation． For constant temperature，when the H2 SO4 con￾centration increased by 15 g·L － 1 in the range of 150 to 180 g·L － 1，the reaction rate constant of gelatin degradation enlarged by 1. 2 times． For constant H2 SO4 concentration，raising the temperature by 5 ℃ in the range of 55 to 70 ℃ increased the reaction rate con￾stant of gelatin degradation by 1. 5 times． For copper electrolysis production，when the concentration of H2 SO4 in the copper electrolyte was 150 to 180 g·L － 1 and the temperature was 60 to 65 ℃，it could be estimated that the residence time of the electrolyte in the electro￾lytic 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% to 90% ． KEY WOＲDS copper; electrolysis; electrolytes; gelatin; degradation; degradation rate 收稿日期: 2014--02--08 基金项目: 国家自然科学基金资助项目( 51274108，21263007) ; 云南省自然科学基金重点资助项目( 2011FA009) ; 昆明理工大学 2009 年科研 基金资助项目( KKZ 4200727003) 明胶或动物胶作为必不可少的添加剂在铜［1--2］、 铅［3--4］、锌［5--6］、镍［7］等有色金属的电解精炼和电解沉