The industrialization of electrochemical synthesis of 3,6-dichloropicolinic acid(3,6-DCP) from 3,4,5,6-tetrachloropicolinic acid(3,4,5,6-TCP) in a tank-type undivided electrolytic cell with silver cathode was investig...The industrialization of electrochemical synthesis of 3,6-dichloropicolinic acid(3,6-DCP) from 3,4,5,6-tetrachloropicolinic acid(3,4,5,6-TCP) in a tank-type undivided electrolytic cell with silver cathode was investigated.The experimental results showed that the electrolytic performance greatly depended on the operation parameters,such as flow rate of electrolyte,temperature,and concentration of NaOH.The reduction of 3,4,5,6-TCP to 3,6-DCP was favored by increasing temperature and flow rate of electrolyte.Industrialization tests of electrochemical synthesis of 3,6-DCP were conducted under the following conditions: silver cathode,temperature 313 K,flow rate 6 cm·s-1,concentration of NaOH 8%(mass),concentration of 3,4,5,6-TCP 5%(mass),cathode current density 600 A·m-2.The current efficiency and conversion ratio of 3,4,5,6-TCP were more than 76% and 99%,respectively.The yield of 3,6-DCP was up to 90% and DC power consumption was 2.939 kW·h·(kg 3,6-DCP)-1.The purity of the product was higher than 95%,and its melting point was 151—153℃.展开更多
地理信息系统(geographic information system,GIS)在智慧城市建设中扮演着重要角色,通过集成空间数据和分析工具,为城市规划、交通管理、公共服务和环境监测提供决策支持。为了提高GIS技术在智慧城市建设中的应用效果,文章对GIS的关键...地理信息系统(geographic information system,GIS)在智慧城市建设中扮演着重要角色,通过集成空间数据和分析工具,为城市规划、交通管理、公共服务和环境监测提供决策支持。为了提高GIS技术在智慧城市建设中的应用效果,文章对GIS的关键技术进行了概述,对GIS技术在智慧城市建设中的城市规划、交通管理、公共服务和环境监测中的应用进行了分析,并提出了相应的优化策略。应用实践结果表明,GIS技术的应用将进一步提升智慧城市建设的效率和效果。展开更多
文摘The industrialization of electrochemical synthesis of 3,6-dichloropicolinic acid(3,6-DCP) from 3,4,5,6-tetrachloropicolinic acid(3,4,5,6-TCP) in a tank-type undivided electrolytic cell with silver cathode was investigated.The experimental results showed that the electrolytic performance greatly depended on the operation parameters,such as flow rate of electrolyte,temperature,and concentration of NaOH.The reduction of 3,4,5,6-TCP to 3,6-DCP was favored by increasing temperature and flow rate of electrolyte.Industrialization tests of electrochemical synthesis of 3,6-DCP were conducted under the following conditions: silver cathode,temperature 313 K,flow rate 6 cm·s-1,concentration of NaOH 8%(mass),concentration of 3,4,5,6-TCP 5%(mass),cathode current density 600 A·m-2.The current efficiency and conversion ratio of 3,4,5,6-TCP were more than 76% and 99%,respectively.The yield of 3,6-DCP was up to 90% and DC power consumption was 2.939 kW·h·(kg 3,6-DCP)-1.The purity of the product was higher than 95%,and its melting point was 151—153℃.
文摘地理信息系统(geographic information system,GIS)在智慧城市建设中扮演着重要角色,通过集成空间数据和分析工具,为城市规划、交通管理、公共服务和环境监测提供决策支持。为了提高GIS技术在智慧城市建设中的应用效果,文章对GIS的关键技术进行了概述,对GIS技术在智慧城市建设中的城市规划、交通管理、公共服务和环境监测中的应用进行了分析,并提出了相应的优化策略。应用实践结果表明,GIS技术的应用将进一步提升智慧城市建设的效率和效果。
