Process for producing white carbon black and co-producing potassium salt

The invention belongs to the field of inorganic chemical industry, and provides a process for producing white carbon black and co-producing sylvite, which comprises the following steps: adding quartz sand and potassium hydroxide into a high-pressure kettle according to a certain molar ratio, reacting at about 260 DEG C for 1-2 hours, adding washing water, filtering, and acidifying filtrate by introducing carbon dioxide or acid. And separating out the white carbon black from the reaction liquid, filtering, washing, drying and crushing to produce the white carbon black. And concentrating and crystallizing the filtrate after the white carbon black is filtered to produce potassium salt. According to the process, the production cost of the white carbon black is reduced, no process wastewater is discharged, and the problem of wastewater pollution in the production process of the white carbon black is thoroughly solved. 本发明属于无机化工领域，提供了一种生产白炭黑联产钾盐的工艺，包括：石英砂、氢氧化钾按一定的摩尔比加入高压釜，于260℃左右反应1-2小时，加入洗水，过滤，滤液通二氧化碳或用酸酸化。白炭黑从反应液