Method and equipment for preparing hydrocarbon by methyl alcohol or/ and dimethyl ether

Abstract

The invention discloses a method and equipment for preparing hydrocarbon by methyl alcohol or / and dimethyl ether. The invention is mainly characterized in that raw material gases, such as methyl alcohol or / and dimethyl ether and the like pass through fixed bed reaction composition equipment for catalysis to generate hydrocarbon, wherein the fixed bed reaction combination equipment is at least provided with two reaction zones, and each reaction zone is provided with a heat exchange tube set capable of independently adjusting heat exchange medium temperature; after reaction gases separate target product hydrocarbon and water by heat exchange and cooling, expect that less chillout recycle gas is mixed with raw material gas, reaction for generating target product hydrocarbon is carried out.The invention has the beneficial effects of small catalyst layer temperature difference, low recycle ratio, high synthetic ratio, small investment, high output, energy saving and consumption reduction.

Description

technical field [0001] The invention relates to a method and equipment for producing hydrocarbons with methanol or / and dimethyl ether, belonging to the field of chemical engineering. Background technique [0002] Using methanol or / and dimethyl ether to produce hydrocarbons, one type of product is mainly gasoline as energy, and the other type of low-carbon olefins is mainly propylene and ethylene as chemical raw materials. The former such as the MTG method of Exxon mobil company (edited by Gao Jinsheng, Coal Liquefaction Technology, Chemical Industry Press, March 2005), generates dimethyl ether through methanol dehydration, and dimethyl ether is further dehydrated to generate hydrocarbons. The main product of the MTG method is Gasoline has good product quality and produces less methane, but the cycle ratio is as high as 9, the reactor is large, and the energy consumption is high. The latter, such as German Lurgi Company, uses methanol to produce low-carbon olefins such as pr...

AI Technical Summary

Problems solved by technology

The former such as the MTG method of Exxon mobil company (edited by Gao Jinsheng, Coal Liquefaction Technology, Chemical Industry Press, March 2005), generates dimethyl ether through methanol dehydration, and dimethyl ether is further dehydrated to generate hydrocarbons. The main product of the MTG method is Gasoline, product quality is good, less methane is produced, but the cycle ratio is as high as 9, the reactor is large, and the energy consumption is high

The latter, such as German Lurgi Company, uses methanol to produce low-carbon olefins such as propylene and ethylene. German Lurgi Company (WO 2004018089) uses molecular sieves as a catalyst, and uses methanol as a raw material to adopt a cold-shock fixed-bed reactor. Production of propylene at 460°C, due to the high heat of the alkylation reaction, the addition of a large amount of water vapor will increase energy consumption and high equipment costs

Images