| 摘要 |
<p>The continuous generation of chlorine dioxide by reduction of sodium chlorate with sulphur dioxide, sodium chloride, methanol or some other suitable reductant requires acid reaction conditions. According to the invention, the acidity is maintained, completely or partially, with acid produced by the electrolysis of a solution of sodium sulphate (Na2SO4 or Na3H[SO4]2). This sulphate is obtained by crystallization and redissolution of sodium sulphate formed in the chlorine dioxide generating process. The electrolysis of the sodium sulphate is limited for reasons of efficiency, such that only a part of the sulphate is decomposed to acid, whereas the remainder is recycled together with the acid to the reactor, where chlorine dioxide is generated. Sodium hydroxide, oxygen gas and hydrogen gas are also formed during the process of electrolysis and are utilized within the pulp manufacturing process.</p> |
