A method and equipment for preparing α-olefins by using the paraffin-wax-based lightening method
A light-weight and olefin technology, which is applied in the fields of hydrocarbon cracking, cracking, organic chemistry, etc., can solve the problems of low α-olefin yield, poor quality of α-olefin products affecting downstream product development, and high production costs. Improve the utilization rate, reduce the production cost and ensure the effect of quality
Inactive Publication Date: 2015-11-04
SHAANXI UNIV OF SCI & TECH
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[0031] These wax cracking olefin production processes currently used have their disadvantages, which can be summarized as low α-olefin yield, the highest is only 64%. The poor quality of α-olefin products affects the development of downstream products, and the production cost is high.
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[0055] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0056] see figure 1 , the present invention comprises a kind of method using paraffin Jishi lightening method to prepare α-olefin, comprises the following steps:
[0057] Step 1): Take raw materials: wax, water and coking inhibitor in proportion: the amount of water injected accounts for 0.05-10% of the raw material, the amount of coking inhibitor added is 0.001-1% of the total raw material, and the rest is wax, which is injected into the vaporization furnace 1 for vaporization, the vaporization temperature is 380-600°C, and the pressure is 0.01-1MPa;
[0058] Step 2): Send the mixed gas obtained after vaporization in step 1) into cracking furnace 2 for cracking reaction, the cracking reaction temperature is 350-600°C, the pressure is 0.01-1MPa, the reaction residence time is 0.01-10 seconds, and the cracking reaction is obtained. Product, during the cracki...
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The invention belongs to the field of olefin preparation by a wax cracking method, and particularly relates to a method and equipment for preparing alpha-olefin by using a paraffin Ji lightening method. According to the method, a raw material is quickly heated and subjected to a high-temperature reaction in a short time in a cracking furnace, pyrolysis gas quickly leaves and enters a quencher for quench cooling, and the reaction is terminated. The method has the advantages that only one cracking reaction is carried out, and occurrence of hydrocarbon condensation reactions can be stopped, so that a generated target alpha-olefin product can leave a reactor in time, and enters a primary fractionating tower and a rectifying tower for fractionating to finally obtain an alpha-olefin product of C6-C18, and the yield of alpha-olefin is up to 80 percent. According to the equipment for preparing alpha-olefin by using the Ji lightening method, a scraper is arranged on the blade edge of an impeller on the cracking furnace in the reaction equipment, and a dispersing plate for preventing blockage and coking is arranged at the bottom of the impeller, so that coking is effectively prevented, and quality of a product can be improved.
Description
technical field [0001] The invention belongs to the field of preparing olefins by wax cracking, and in particular relates to a method and equipment for preparing alpha-olefins by using a paraffin-wax-based lightening method. Background technique [0002] The production methods of α-olefins include extraction separation method, fatty alcohol dehydrogenation method, internal olefin isomerization method, wax cracking method, ethylene oligomerization method, etc. Among various preparation methods, the latter two methods are mainly used in industry. Due to the blockade of foreign ethylene oligomerization technology to China, my country has so far been unable to introduce mature foreign technology, except that Sinopec Guangzhou Branch, Jiangsu Huajin Nantong Ethylene Co., Ltd. and PetroChina Fushun Petrochemical Branch have been able to produce ethylene dimerization 1- Butene, Sinopec Yanshan Branch and PetroChina Daqing Petrochemical Branch have been able to produce ethylene trim...
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IPC IPC(8): C10G9/00C07C4/04C07C11/02
Inventor 郭睿解传梅刘龙伟王二蒙王敏宋艳艳
Owner SHAANXI UNIV OF SCI & TECH