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苯酐(全称邻苯二甲酸酐)和顺酐(顺丁烯二酸酐的简称)都是生产农药的一种重要的有机化工原料。目前国内现有苯酐生产厂家30余家,生产能力最大的山东宏信化工股份有限公司现有苯酐装置能力18万吨/年,年产量在10万吨的企业仅有三家左右。多数厂家的年生产能力在5万吨以下,部分厂家
Phthalic anhydride (full name of phthalic anhydride) and maleic anhydride (maleic anhydride referred to) are all important pesticides for the production of organic chemical raw materials. At present, there are more than 30 domestic manufacturers of phthalic anhydride and the largest production capacity of Shandong Hongxin Chemical Co., Ltd. has an existing phthalic anhydride plant capacity of 180,000 tons / year and an annual output of 100,000 tons. Most manufacturers have an annual production capacity of 50,000 tons or less, some manufacturers