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Sodium sesquisulfate produced in crystalline form in a high acidity highly efficient chlorine dioxide generating process is converted by metathesis to crystalline anhydrous neutral sodium sulfate and the acid recovered as a result is recycled to the chlorine dioxide generating step. The metathesis i

Sodium sesquisulfate produced in crystalline form in a high acidity highly efficient chlorine dioxide generating process is converted by metathesis to crystalline anhydrous neutral sodium sulfate and the acid recovered as a result is recycled to the chlorine dioxide generating step. The metathesis is effected by contacting the crystalline sodium sesquisulfate with aqueous sodium chlorate solution, aqueous sodium chloride solution, aqueous methanol or water alone. The metathesis is effected in such manner as to minimize the additional evaporative load imposed on the chlorine dioxide generating process by the metathesis medium.

대표청구항 ▼

A process for the conversion of sodium sesquisulfate to neutral anhydrous sodium sulfate, which consists of: contacting said sodium sesquisulfate in solid crystalline form with an aqueous medium consisting of about 0.01 to about 7 molar sodium chlorate for a time and at a temperature at least suffic

A process for the conversion of sodium sesquisulfate to neutral anhydrous sodium sulfate, which consists of: contacting said sodium sesquisulfate in solid crystalline form with an aqueous medium consisting of about 0.01 to about 7 molar sodium chlorate for a time and at a temperature at least sufficient to effect conversion of said solid crystalline sodium sesquisulfate to neutral anhydrous sodium sulfate at least partially in solid crystalline form and to form an aqueous acid-containing medium having a total acid normality of up to about 6.5 normal.