申请人:Bayer Aktiengesellschaft
公开号:US04021455A1
公开(公告)日:1977-05-03
Process for the manufacture of practically mercury-free anthraquinonesulphonic acids, characterized in that anthraquinone is sulphonated with sulphuric acid containing SO.sub.3 in the presence of catalysts containing mercury, at elevated temperature, the sulphonation mixture, if appropriate after dilution with water, is subsequently treated with an inorganic or organic compound of divalent sulphur and thereafter, if appropriate following dilution with water, the mercury compounds present in an insoluble form are separated off and the anthraquinonesulphonic acids are then isolated in a known manner.
制备几乎不含汞的蒽醌磺酸的方法,其特征在于在存在含有SO.sub.3的硫酸催化剂的条件下,将蒽醌磺化为磺酸,反应温度升高,如适当情况下,磺化混合物在稀释水后,随后与二价硫的无机或有机化合物处理,然后,如适当情况下,稀释水后,将存在于不溶形式的汞化合物分离,然后以已知方法分离出蒽醌磺酸。