我国顺丁烯二酸酐的路线主要采用苯氧化法和正丁烷氧化法。苯氧化工艺由于马来酸酐技术的研究和应用早，早期原料容易获得，所以在我国占有较大的比重。2016年，我国顺丁烯二酸酐能力约为200万吨，其中苯顺丁烯二酸酐135万吨(67.5%)，丁烷顺丁烯二酸酐65万吨(32.5%)。但近年来，原料偏高，顺酐苯氧化法成本不断上升，企业亏损严重，开工率低，许多旧设备闲置。但目前正丁烷法的成本比苯法每吨低3000元左右，整体利润相当丰厚。这种方法直到20世纪七八十年代才得到发展和普及。近年来，随着我国西部东部天然气富余，下游正丁烷供应充足，低廉，丁烷氧化法和对苯法的替代正在加快。
The main production routes of maleic anhydride in China are benzene oxidation and n-butane oxidation. Because of the early research and application of maleic anhydride technology, benzene oxidation process has a large proportion in China. In 2016, the production capacity of maleic anhydride in China was about 2 million tons, including 1.35 million tons (67.5%) of phenylmaleic anhydride and 650000 tons (32.5%) of butane maleic anhydride. However, in recent years, the price of raw materials is on the high side, the cost of maleic anhydride benzene oxidation method is rising, the enterprise has serious losses, the operating rate is low, and many old equipment is idle. But at present, the cost of n-butane method is about 3000 yuan lower than that of benzene method, and the overall profit is quite rich. This method was not developed and popularized until 1970s and 1980s. In recent years, with the abundant natural gas from the west to the east of China, the downstream n-butane supply is sufficient and the price is low, the substitution of butane oxidation method and p-benzene method is speeding up.
除了新项目外，一些企业也在悄悄将原来的苯法改为丁烷法。浙江华晨能源早在2009年就提出了4万吨苯基马来酸酐的技术改造项目，现已竣工。另一家公司昌茂生物化学(changmaobiochemistry)去年9月也提出了一个用2万吨正丁烷取代邻苯二甲酸酐的项目。目前，常州亚邦化工有限公司拥有12万吨的能力。除了信阳科技有限公司投资的新设备外，今年还开始准备4万吨苯基马来酸酐的技术改造项目。
In addition to new projects, some enterprises are quietly changing the original benzene method to butane method. As early as 2009, Zhejiang brilliance energy put forward the technical transformation project of 40000 tons of phenylmaleic anhydride, which has been completed. Another company, Chang Mao biochemistry, last September proposed a project to replace phthalic anhydride with 20000 tons of n-butane. At present, Changzhou Yabang Chemical Co., Ltd. has a production capacity of 120000 tons. In addition to the new equipment invested by Xinyang science and Technology Co., Ltd., this year, the technical transformation project of 40000 tons of phenylmaleic anhydride has also been prepared.
除成本压力对苯顺酐厂外，政策也有较大的阻力。近年来，不仅享受到了经济发展带来的好处，也经历了日益严重的污染带来的痛苦后果。众所周知，苯基马来酸酐不仅昂贵，而且由于原料苯的使用，在方面也有很大的劣势。随着我国目前对环境保护的重视，可以预期苯马来酸酐装置的生存空间将会越来越小。
In addition to the cost pressure on the phthalic anhydride plant, environmental protection policies also have greater resistance. In recent years, it has not only enjoyed the benefits of economic development, but also experienced the painful consequences of increasingly serious pollution. As we all know, phenylmaleic anhydride is not only expensive, but also has a great disadvantage in environmental protection due to the use of benzene as raw material. With the current attention to environmental protection in China, it can be expected that the living space of the plant will be smaller and smaller.
以上是
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