甲基磺酸的合成新工艺  

A new synthetic method of methanesulfonic acid

作　　者：李立清[1] 朱明华[1] 

机构地区：[1]江西理工大学材化学院,江西赣州341000

出　　处：《电镀与涂饰》2005年第12期25-26,36,共3页Electroplating & Finishing

摘　　要：与硫酸盐电镀锡和氟硼酸盐电镀锡铅合金相比,甲基磺酸盐电镀锡和锡铅合金能大大降低环境污染,提高镀液的稳定性。介绍了一种新的甲基磺酸合成方法———二甲基二硫直接氧化法,采用甲基磺酸自催化。该法工艺简单,原料来源方便,成本较低,污染小。讨论了反应温度及甲基磺酸与过氧化氢的摩尔比对产物组成的影响。在反应温度为85℃、甲基磺酸与过氧化氢的摩尔比在1∶6.0的情况下,产物收率达到95%以上。Pollution is greatly lightened and bath stability is strengthened in tin and tin-lead alloy electroplating by using methanesulfonate compared with that by using sulfate. A new synthetic method of methanesulfonic acid using methanesulfonic acid as self-catalyzer--direct oxidation of dimethyl disulfo is introduced. The method has advantages of easy process, convenient raw material source, low cost and pollution. The influences of reaction temperature and mol ratio of methanesulfonic acid to hygrogen peroxide on the composition of the resultant were discussed. The yield of methanesulfonic acid with this new method is up to over 95 % with mol ratio of methanesulfonic acid to hygrogen per- oxide 1：6.0 and at 85 ℃.

关 键 词：锡和锡铅合金电镀 甲基磺酸 二甲基二硫 直接氧化 过氧化氢 

分 类 号：TQ227.41[化学工程—有机化工] TQ153.13