China drying wire Reuters Southwest Chemical Industry Research and Design Institute developed the esterification of acetic acid hydrogenation of ethanol technology projects in Chengdu by the experts organized by the Sichuan Provincial Science and Technology Department. Experts believe that this technology has low energy consumption, low cost, advanced technology and equipment, and excellent catalyst performance. The promotion of this technological achievement can not only solve the problem of serious overcapacity in the acetic acid industry, but also enable coal chemical industry to replace the grain route to produce bulk energy chemicals. It is reported that the Southwest Research Institute has been developing technology for the hydrogenation of acetic esterification and its catalysts since 2008. It has made breakthroughs in the hydrogenation of acetic acid to ethanol, and has applied for six invention patents and has formed independent intellectual property rights. New processes and new technologies.
According to reports, this technology has for the first time enabled coal chemical technology to replace the "grain route" for the production of fuel ethanol, and developed a complete set of acetic esterification, hydrogenation, and ethanol technologies with independent intellectual property rights. It was verified through small-scale tests, model tests, and pilot tests. The feasibility of its process route, and took the lead in the domestic development of 200,000 tons / year scale of industrialization demonstration, the current process software package development has been completed.
At the same time, the special catalyst developed by it has high activity, good stability and high selectivity. The conversion rate is as high as 97% and the selectivity to ethanol is more than 98%. The catalyst and process technology are also applicable to the production of ethanol from crude ester hydrogenation, which simplifies the traditional ethyl acetate distillation process of acetic esterification and greatly reduces the energy consumption of purifying ethyl acetate. The hydrogenation catalyst has a high conversion rate in one pass and vice versa. With less product, the product has high purity and low energy consumption for separation.
In addition, compared with direct hydrogenation of acetic acid to ethanol, this technology avoids equipment corrosion, high equipment investment, and high catalyst costs. Ethanol produced by this technology is significantly lower than the traditional grain fermentation method, and it has a strong market competitiveness. It is understood that the cost of producing ethanol by grain fermentation methods is as high as 7,500 to 8,000 yuan per ton, while the production of ethanol from petroleum ethylene routes is due to the shortage of oil resources in China and the increase in oil prices, resulting in higher production costs. The cost of ethanol produced using this technology is about 6,100 yuan/ton, and the cost is competitive.
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