检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
出 处:《现代化工》2010年第3期84-86,共3页Modern Chemical Industry
摘 要:介绍了以焦亚硫酸钠(Na2S205)、锌粉(Zn)、甲醛(CH2O)为原料,一步法合成次硫酸氢钠甲醛的新工艺,研究了合成原理及工艺条件:m(Zn):m(Na2S2O5):m(CH20)=9:10:8,活化温度≤45℃,最高反应温度为95~102℃,高温反应时间为90min,得到的次硫酸氢钠甲醛产品质量可达到HG2281--1992一级品标准,应用该工艺在湖南中成化工有限公司建成了国内第1套产能6000t/a生产装置。A new one-step synthetic process for formaldehyde sodium sulfoxylate with formaldehyde, sodium bisulfite and zinc powder as raw materials is introduced. Its reaction mechanism is studied, and the optimum operational conditions are as follows: m ( Zu ) : m ( Na/S2 O5 ) : m ( CH2O ) = 9 : 10 : 8, activation temperature ~〈 45℃, the highest reaction temperature of 95 - 102℃, and pyroreaction time is 90 minutes, the formaldehyde sodium sulfoxylate thus is got and its quality can reach the standard of HG 2281--1992. The new technology is successfully applied in Hunan Zhongcheng Chemical Company Ltd. with the formaldehyde sodium sulfoxylate production capacity of 6 000 t/a.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.15