Method for separating low-carbon olefin mixed gas
A technology of mixed gas and low-carbon olefins, which is applied in the direction of absorption purification/separation, organic chemistry, etc., can solve the problems of product structure limitation, unable to meet the rapid growth of propylene consumption, etc., and achieve strong economy, less equipment investment, and reliable process Effect
Active Publication Date: 2010-11-24
CHINA TIANCHEN ENG +1
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Problems solved by technology
Although the existing propylene production technology (cracking ethylene co-production and refinery by-product) is highly mature, the product structure is severely restricted and cannot meet the requirements of the rapid growth of propylene consumption
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The invention discloses a separation method of low-carbon olefin mixed gas. At least one of alcohols, ethers and ketones that contain one to four carbon atoms in a molecule is added into the low-carbon olefin mixed gas as the absorbent, which, at a certain temperature and under a certain pressure, effectively absorbs C3-C5 components in the low-carbon olefin mixed gas; then absorption, desorptionand rectification are used to separate the C3-C5 components in the low-carbon olefin mixed gas. The method of the invention, applicable to middle and small-scale low-carbon olefin preparation by methanol transformation, has exceedingly strong economic property and the advantages of reliable performance, low equipment investment and low energy consumption.
Description
A kind of separation method of low-carbon olefin mixed gas technical field The invention belongs to the field of refining low-carbon olefins, and relates to a method for separating mixed gases of low-carbon olefins. Background technique Ethylene and propylene are important platform compounds and basic chemical raw materials in petrochemical industry, with an annual global demand of nearly 200 million tons. In the next few years, there will still be a large gap in domestic production of ethylene and propylene. The existing ethylene and propylene production technologies are heavily dependent on petroleum resources. Light oil cracking is commonly used in ethylene production, and about 97% of propylene production comes from the co-production of cracking ethylene and refinery by-products. The cost of raw materials for preparing ethylene and propylene by light oil cracking method accounts for 60-80% of the production cost. Although the existing propylene production technology...
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IPC IPC(8): C07C7/11C07C11/02
Inventor 魏飞孙世谦王垚刘新伟曹振岩邢爱华钱震任昌瑜王志文李宗奎李丽梅方留安曲建平
Owner CHINA TIANCHEN ENG