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.
出处
《现代化工》
CAS
CSCD
北大核心
2010年第3期84-86,共3页
Modern Chemical Industry
关键词
次硫酸氢钠甲醛
合成
生产应用
formaldehyde sodium sulfoxylate
synthesis
production practice