Method of recovering light hydrocarbon from byproduct gas of Fischer-Tropsch synthesis

A by-product gas and Fischer-Tropsch synthesis technology, applied in the chemical industry, can solve problems such as unrealized use value, achieve the effect of simplifying the composition and improving the product yield
CN103626898AActive Publication Date: 2014-03-12CHINA PETROCHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROCHEMICAL CORP
Publication Date
2014-03-12

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Abstract

The invention discloses a method of recovering light hydrocarbon from byproduct gas of Fischer-Tropsch synthesis. The method includes exhaust gas treatment, light hydrocarbon recovery, olefin conversion and polyolefin synthesis. The exhaust gas treatment includes decarburization and crude separation of a C1 stream and a C2 stream. The light hydrocarbon recovery includes separating the C2 stream, cracking gas and a portion of mixed C4 to obtain a stream comprising ethane, ethylene, propane, propylene, the mixed C4 and light naphtha. The olefin conversion includes reacting C4 olefins with the ethylene to produce the propylene. The polyolefin synthesis includes subjecting the obtained ethylene and the obtained propylene to polymerization to obtain polyethylene and polypropylene. The method is capable of increasing the yield of effective products of Fischer-Tropsch synthetic products, increasing the product kinds, improving the added valve of the products and increasing benefit.
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Description

technical field

[0001] The invention relates to the field of chemical industry, in particular to a method for recovering and utilizing light hydrocarbons from Fischer-Tropsch synthesis by-product gas. Background technique

[0002] The Fischer-Tropsch synthesis process will use synthesis gas (CO+H2) produced by different raw materials and methods, and generate liquid hydrocarbon products through F-T (Fischer-Tropsch) synthesis reaction under the action of a catalyst. Through the Fischer-Tropsch (F-T) synthesis process, coal, natural gas, and oilfield associated gas can be liquefied to produce petroleum products such as naphtha, diesel oil, and kerosene. The F-T synthesis process produces a large amount of gas by-product while producing liquid oil, which is usually called Fischer-Tropsch synthesis tail gas. This part of the gas contains CO, CO2, H2 and light hydrocarbons with lower carbon numbers, such as methane, carbon two, carbon three (propylene and propane) and carbon fo...

Claims

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