Although Carbon 4 is on the way to use chemical industry, it is a development trend.

With the completion of domestic refinery and ethylene projects and the commencement of production of ethylene projects, the by-product carbon 4 resources are becoming increasingly abundant. At the same time, due to the development of the natural gas industry, the amount of carbon tetrahydrocarbons as traditional civilian liquefied gas is gradually decreasing. The use of carbon 4 resources in the chemical industry will not only effectively resolve the current contradiction between supply and demand, but will also become a future development trend. This is the consensus reached by representatives of the participating companies and experts on the 2012 C4/C5/C9/C10 Separation Technology and Resources Comprehensive Utilization Forum that ended on April 26. Experts also reminded investment companies that they should pay attention to differentiated development and should not blindly follow suit for a certain carbon 4 chemical utilization project.

The carbon by-product of the refinery's carbon tetrachloride and pyrolysis of ethylene is the main source of carbon tetrahydrocarbyl. In 2011, along with China's primary processing capacity of crude oil reached 540 million tons and ethylene production increased to over 15 million tons, the amount of carbon tetrahydrocarbon resources exceeded 10 million tons. However, Professor Zhou Hongjun of the China University of Petroleum told reporters that due to the release of DME production capacity and the development of the natural gas industry, the benefits of C4 hydrocarbons as a civilian fuel are not being favored. The road to chemical use is the development of the C4 industry. The trend will be unlimited in the next 5 to 10 years.

Among the many carbon 4 chemical use routes, Yuan Xiaguang, a senior engineer of the Sinopec Technology Development Department, believes that there are two development prospects: First, carbon tetra-butadiene. Due to the current sharp increase in domestic rubber production capacity, the demand for butadiene will remain tight in the next few years, and butadiene with carbon tetrachloride will have great potential for development, and the technology is already quite mature, showing a certain degree of economy. The second is carbon tetrahydrocarbene to propylene. Due to the increasing global demand for propylene, the average annual growth rate of propylene has exceeded the growth rate of ethylene. Therefore, the production of propylene from carbon tetrahydrocarbons will also be a competitive route and should be moderately developed.

With the continuous development of carbon tetra- chemical utilization technology, the carbon 4 deep processing project has begun to emerge in the past two years. The high-promising carbon tetra- catalytic cracking and propylene industrialization technology development project jointly developed by Shaanxi Coal Chemical Engineering Technology Center Co., Ltd. and Shanghai Hetu Petrochemical Engineering Co., Ltd. passed the assessment last year. The project uses mixed carbon 4 as raw material, adopts fluidized bed reaction technology and independently developed catalyst to produce propylene and ethylene products, and can obtain higher yields of ethylene and propylene. Shanghai Huayi Group's annual output of 680,000 tons of mixed carbon-carbon composite deep-processing projects with methacrylic acid, methyl methacrylate and butadiene rubber as main products was also launched in November last year. The core technology of isobutylene oxidation to MAA of this project is independently developed by Huayi Group, and the designed annual production capacity is 200,000 tons.

According to Wang Chunsheng, general manager of Shandong Haicheng Petrochemical Engineering Design Co., Ltd., Haicheng Petrochemical and other scientific research institutes have also collaborated on the development of a new technology for producing propylene, sec-butyl acetate, and aromatization to produce oil-gas blending components. Decarbonization of carbon tetraalkane to isobutene, propane reforming, isomerization isobutane and other technologies. The successful development of these technologies provided a good support for the use of carbon tetrachloride in the chemical industry.

However, experts also pointed out that although carbon four is on the way to use chemical industry, it is a development trend, but companies can't blindly pursue carbon tetrachloride chemical utilization, but should fully rely on the original installation of the company and combine local resource distribution to choose the right one for themselves. Carbon 4 deep processing route. Hongyuan Securities senior analyst Shigeru Chai told reporters that there is no universal formula for carbon 4 deep processing. The technology suitable for this company may not be able to use another company. Enterprises should comprehensively inspect the situation of each party and tailor it.

Wang Chunsheng pointed out that if companies invest in carbon 4 deep processing projects, they should extend the industrial chain as much as possible and use every substance in the carbon four fraction as much as possible. Li Yansheng, the technical director of Wison Engineering (China) Co., Ltd., suggested that companies that develop carbon 4 deep processing should extend the industrial chain as much as possible, or work together with other companies to improve the industrial chain in order to ensure good economic returns.

In addition, the experts also emphasized that in the same region, attention should be paid to differential development, and different carbon 4 deep processing routes should be selected, and it is not always possible to follow the trend of developing hot process routes in order to prevent excessive surpluses in the future.