工程科学学报
工程科學學報
공정과학학보
Journal of University of Science and Technology Beijing
2015年
5期
40-47
,共8页
李坚%华一新%施哲%田国才%徐存英
李堅%華一新%施哲%田國纔%徐存英
리견%화일신%시철%전국재%서존영
铜%电解%电解液%明胶%分解%分解速率
銅%電解%電解液%明膠%分解%分解速率
동%전해%전해액%명효%분해%분해속솔
copper%electrolysis%electrolytes%gelatin%degradation%degradation rate
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%.
採用透析的方法將銅電解液中相對分子質量大于3500的明膠進行分離,以二喹啉甲痠( BCA)法測定所得明膠質量濃度,研究瞭硫痠質量濃度和溫度對銅電解液中明膠分解規律的影響.銅電解液中Cu2+基本不影響明膠的穩定性；電解液溫度升高和硫痠質量濃度增大,都加劇瞭明膠的分解.在相同溫度下,硫痠質量濃度在150~180 g·L-1範圍內每增加15 g·L-1,明膠分解反應速率常數增大約1.2倍；而在相同的硫痠質量濃度下,溫度在55~70℃範圍內每增加5℃,明膠分解反應速率常數增大約1.5倍.對于銅電解生產,電解液中硫痠質量濃度150~180 g·L-1以及溫度60~65℃,可推算齣電解液在電解槽中停留3~4 h,明膠的分解率達50%~80%；電解液經過完整的一週循環約需6 h,明膠的分解率可達到70%~90%.
채용투석적방법장동전해액중상대분자질량대우3500적명효진행분리,이이규람갑산( BCA)법측정소득명효질량농도,연구료류산질량농도화온도대동전해액중명효분해규률적영향.동전해액중Cu2+기본불영향명효적은정성；전해액온도승고화류산질량농도증대,도가극료명효적분해.재상동온도하,류산질량농도재150~180 g·L-1범위내매증가15 g·L-1,명효분해반응속솔상수증대약1.2배；이재상동적류산질량농도하,온도재55~70℃범위내매증가5℃,명효분해반응속솔상수증대약1.5배.대우동전해생산,전해액중류산질량농도150~180 g·L-1이급온도60~65℃,가추산출전해액재전해조중정류3~4 h,명효적분해솔체50%~80%；전해액경과완정적일주순배약수6 h,명효적분해솔가체도70%~90%.
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%.
