Conversion method of C4 and heavier components

A heavy component and part of the technology, applied in the field of conversion of C4 and heavier components, can solve the problem of not involving butene recycling, cracking condition limitation, heat imbalance in olefin cracking system, etc., to avoid catalyst pollution problems. Effect

Active Publication Date: 2010-01-27
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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Problems solved by technology

[0016] In summary, although the prior art involves carbon four and heavier components (C 4 + ) back refining method, but there are still many problems: including the use of different catalyst systems, the need to build an independent C 4 + Cracking unit, heat imbalance of olefin cracking system, need to specialize for C 4 + The cracking unit provides the required heat, the cracking conditio

Method used

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  • Conversion method of C4 and heavier components
  • Conversion method of C4 and heavier components
  • Conversion method of C4 and heavier components

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Embodiment Construction

[0046] figure 1 , figure 2 with image 3 Shown is a schematic flow chart for an oxygenate-to-olefins process.

[0047] figure 1 Two sets of reaction regenerations are shown, but the same catalyst is used in auxiliary reactor 11 and main reactor 4 . The oxygen-containing compound 3 enters from the lower part of the main reactor 4, contacts and reacts with the catalyst in the main reactor 4, and the reaction product is separated by the main reactor cyclone separator 2, and the separated product is rich in low-carbon olefins such as ethylene and propylene. The reaction gas 1 of the main reactor is drawn from the top of the main reactor 4, mixed with the reaction gas 8 of the auxiliary reactor 11 from the auxiliary reactor 11, and sent to the rear quenching water washing system, and the catalyst carried in the reaction gas is further washed by quenching Fine powder, most of the water in the reaction gas is separated by water washing, and then sent to the rear olefin separatio...

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Abstract

The invention discloses a conversion method of C4 and heavier components, thereby improving the yield of ethylene and propylene. The method carries out further cracking on the C4 and the heavier components separated from reaction gas, a catalyst used for cracking is the same with the catalyst of the main reaction, and a cracking device comprises an auxiliary reactor and/or an auxiliary regenerator. The use of the method can improve the total selectivity of ethylene and propylene to 85-90%, and the weight ratio of ethylene to propylene in products can be flexibly regulated between 1.2 and 0.8.

Description

Technical field: [0001] The present invention relates to a kind of oxygen-containing compound (mainly methanol, ethanol, dimethyl ether, C 4 ~C 10 Alcohol compounds or their mixtures, etc.) as raw materials, in the continuous reaction and regeneration process of generating light olefins as the main stream (mainly ethylene and propylene), the by-product carbon four and heavier components (C 4 + ) further react the method for producing ethylene and propylene. Background technique: [0002] Light olefins (ethylene, propylene, butadiene) and light aromatics (benzene, toluene, xylene) are the basic raw materials for petrochemicals. At present, ethylene production mainly relies on the tube furnace steam cracking process of light naphtha raw material. Due to the shortage of crude oil resources and the increasing price, naphtha resources have become more and more insufficient, and the production cost of low-carbon olefins is getting higher and higher. At home and abroad, we are...

Claims

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Application Information

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IPC IPC(8): C07C4/06C07C11/02
CPCY02P20/52Y02P20/584
Inventor 陈俊武刘昱施磊乔立功张洁梁龙虎陈香生
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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