利用硫酸盐法纸浆黑液生产二甲基亚砜技术概要

Technical summary of dimethyl sulfoxide production using kraft pulp black liquor

利用硫酸盐纸浆黑液生产精细化工产品:二甲基亚砜,是降低成本,提高黑液利用价值的重要措施。在黑液中加入硫化钠,加入管道反应器中加压、加热,使黑液中木质素的甲氧基与硫化钠反应,生成甲硫醚,再以二氧化氮为催化剂,在氧化塔中用纯氧氧化,生成二甲基亚砜。黑液返回碱回收,不影响造纸工艺。美国、加拿大许多牛皮纸浆生产中都有甲硫醚回收装置,用以降低成本,提高效益。我国六十年代进行过研究取得成熟工艺。本文以年产10000吨二甲基亚砜产品为例,介绍生产工艺及设计数据,提供参考。

The use of kraft pulp black liquor production of fine chemical products： dimethyl sulfoxide, is to reduce the cost, improve the use of black liquor important measures. In the black liquor by adding sodium sulfide, added to the pipe reactor in pressurized, heating, so that the black liquor in wood of methoxy radicals react with sodium, dimethyl sulfide generation, with nitrogen dioxide as catalyst, in oxidizing tower with pure oxygen oxidation and generation of dimethyl sulfoxide. The recovery of the black liquor is not affected by the process of the paper. In the United States, Canada, many kraft pulp production in the use of a sulfur recovery unit, to reduce costs, improve efficiency. In the 1960 ＇s of our country, we have studied the mature technology. In this paper, an annual output of 10000 tons of dimethyl sulfoxide products as an example, the production process and design data were provided for a reference.