国内外新戊二醇生产现状及市场分析

Production Status and Market Analysis of Dimethyltrimethylene Glycol at Home and Abroad

目前,全球新戊二醇的总产能超过40万t/a,主要应用领域是涂料树脂和不饱和聚酯树脂。我国新戊二醇2002年的产能为2·3万t/a,2005年为5·7万t/a,增长了128%。2004年我国新戊二醇的产量为2·8万t,进口量2·9万t,产不足需。新戊二醇的生产方法有甲酸钠法和缩合加氢法,前者为一步法,工艺过程副产大量甲酸钠;后者为两步法,产品收率较高,可达99%。

At present, the total capacity of dimethyltrimethylene glycol in the world is 400 kt/a. Dimethyltrimethylene glycol is mainly used as raw material in preparing resins for coatings and unsaturated polyester resin. In 2002 the capacity of dimethyltrimethylene glycol in China was 23 kt/a, and in 2005 was 57 kt/a with an increase of 128%. The output of dimethyltrimethylene glycol in China was 28 kt/a in 2004, with the import of 29 kt/a. The demand exceeds the output. There are two routes to produce dimethyltrimethylene glycol, viz. sodium formate method and condensation hydrogenation method. The former is one-step process, which can produce sodium formate in big volume as by-product, the later is twostep process in which the product yield can reach as high as 99%.