Discusses the technology with double caldrons in series in the chloration process of the technology of producing O chlorobenzaldehyde.

• 介绍了在邻氯苯甲醛合成中,采用的双釜串联氯化技术,改善了反应条件、提高了氯气利用率、降低了消耗、解决了环境污染问题。