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A method for producing olefins from oxygen-containing compounds

A compound and olefin production technology, which is applied in the direction of hydrocarbon production from oxygen-containing organic compounds, hydrocarbon cracking, organic chemistry, etc., can solve the problems of low conversion rate, cracking condition limitation, and not involving butene recycling, and achieve Effect of Yield Improvement

Active Publication Date: 2016-08-03
CHINA PETROCHEMICAL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] In summary, in the prior art, although C in some oxygenate conversion reactions is involved 4 and C 4 + Refinery method, but there are still different catalyst systems used, and it is necessary to build an independent C with relatively high investment 4 + Cracking unit, heat imbalance of olefin cracking system, need to specialize for C 4 + The cracking unit provides the required heat, the cracking conditions are limited, and the conversion rate is low; only focus on the C in unconverted raw materials and products 5 + components, usually does not involve the recycling of butene; there are also some technologies aimed at propylene to increase the total yield of propylene through the recycling of by-products, but most of them adopt the simple form of recycling the by-products back to the original reactor

Method used

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  • A method for producing olefins from oxygen-containing compounds
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Embodiment Construction

[0043] like figure 1 As shown, a method for producing olefins from oxygen-containing compounds, the oxygen-containing compounds 3 enter the lower part of the main reactor 5, contact and react with the high-temperature regenerated catalyst from the first regenerator 14, and the reaction products are separated by the main reactor cyclone 6 The reaction gas 7 of the main reactor is separated and passed through the quench water washing system, and the temperature of the reaction gas is further reduced by quenching and water washing, and the catalyst fine powder carried in the reaction gas is washed at the same time. To the olefin separation unit; in the olefin separation unit, the obtained target products ethylene and propylene are discharged from the device, C 4 ~C 8 As part of the feed to the auxiliary reactor 26 or the auxiliary riser reactor 9, the hydrocarbon is in direct contact with the high-temperature regenerated catalyst from the second regenerator 18 in the auxiliary r...

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Abstract

The invention discloses a method for preparing olefins from an oxygen-containing compound. The oxygen-containing compound is put into a main reactor and contacts and reacts with a regenerated catalyst from a first regenerator, and the reaction oil gas enters a separation system; a catalyst to be regenerated enters a first regenerator for regeneration, and the regenerated catalyst is recycled; C4-C8 hydrocarbons are put into an auxiliary reactor, and contact with a catalyst from a second regenerator, and then the reaction oil gas enters a separation system for separation; next, the catalyst enters the second regenerator to be regenerated and the regenerated catalyst is recycled. The method is high in selectivity of light olefins, simple in process flow and low in investment.

Description

Technical field: [0001] The present invention relates to the technical field of preparing hydrocarbons from one or several non-hydrocarbon compounds, in particular to a method for preparing olefins from oxygenated compounds. Background technique: [0002] Light olefins mainly composed of ethylene, propylene and butadiene and light aromatic hydrocarbons mainly composed of benzene, toluene and xylene are the basic raw materials of petrochemical industry. At present, ethylene production mainly relies on the steam cracking process of light naphtha feedstock in tube furnace. 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 light olefins is getting higher and higher. At home and abroad, ethylene production routes with richer sources of raw materials are being actively developed. The organic oxygen-containing compound raw materials are catalyzed by metal-modified SAPO type smal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06C07C11/04C07C4/06C07C1/20
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 陈俊武刘昱施磊乔立功王国良陈香生张洁梁龙虎昌国平李海瑞
Owner CHINA PETROCHEMICAL CORP
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