Abstract: This article reviews the present situation and problems of chlorohydrin process of propylene oxide （CHPO） saponification wastewater treatment in China and the rest of the world. A method of CHPO saponification wastewater treatment and resource reuse with completely independent intellectual property rights was introduced，and several of the key problems were stated. The feasibility of the method in the application and engineering aspects was discussed. Calcium chloride in saponification wastewater could be converted into higher value calcium carbonate ultrafine powder，and the remaining wastewater could be recycled. The establishment of a complete CHPO circular economy system was possible to form a green process of economic efficiency. Saponification wastewater pollution could not only be treated，but also be fully utilized. The devices of saponification wastewater treatment and resource reuse to support CHPO with an annual output of 60kt could produce 100kt of commercial calcium carbonate per year，recycle 120kt industrial salt per year and 2.5×106m3 process water per year，at the same time reduce discharge of 2.5×106m3 wastewater per year，profit before tax profit of about RMB 60 million.

Key words: propylene oxide （PO）, chlorohydrin process, saponification wastewater, resource reuse, cleaner production

摘要： 回顾了国内外氯醇法环氧丙烷皂化废水处理工艺现状和问题，介绍了一个拥有完全自主知识产权的氯醇法环氧丙烷皂化废水治理和资源化利用方法，阐述了其中若干关键问题以及应用基础研究，从应用和工程化的角度对该法的可行性进行了讨论。研究结果表明，将皂化废水中的氯化钙转化为较高价值超细粉体碳酸钙，同时回收利用废水，建立一个完整的氯醇法环氧丙烷生产循环体系，形成经济高效的绿色工艺是可能的。皂化废水污染不仅能够得到治理，而且将得到充分利用。一个配套60kt/a氯醇法环氧丙烷生产能力的皂化废水治理和资源化利用装置，每年可得到100kt高附加值的超细粉体碳酸钙，回收120kt工业盐、工艺用水2.5×106m3，减少废水排放2.5×106m3，实现利税6000万元。

关键词: 环氧丙烷, 氯醇法, 皂化废水, 资源化, 清洁生产