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Process method for directly preparing olefin from synthesis gas

A process method and synthesis gas technology, applied in chemical instruments and methods, from carbon oxides to hydrocarbons, sustainable manufacturing/processing, etc., can solve the problem of low utilization rate of synthesis gas, achieve high selectivity, suppress selectivity , the effect of high one-way conversion rate

Pending Publication Date: 2021-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low synthesis gas utilization rate in the prior art, and provide a process method for directly producing olefins from synthesis gas, which circulates the unreacted synthesis gas containing methane, and controls the content of methane participating in the reaction, Improve the actual utilization rate of syngas without affecting the single-pass conversion rate

Method used

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  • Process method for directly preparing olefin from synthesis gas
  • Process method for directly preparing olefin from synthesis gas
  • Process method for directly preparing olefin from synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] use as figure 1 In the process flow shown, the catalyst in the fixed bed is filled with oxide and molecular sieve at a ratio of 1:1, ZnCr oxide in the oxide; the molecular sieve is SAPO-34 molecular sieve, at 400°C, 4.0Mpa, 4800h -1 Under the condition of controlling H 2 :CO=1:1, methane content was 10%, reacted for 20 hours, and the reaction product was monitored online by gas chromatography. The reaction results are shown in Table 1.

Embodiment 2

[0037] Adopt the technological process and catalyst packing with embodiment 1; At 400 ℃, 4.0Mpa, 4800h -1 Under the condition of controlling H 2 :CO=1:1, methane content was 3%, reacted for 20 hours, and the reaction product was monitored online by gas chromatography. The reaction results are shown in Table 1.

Embodiment 3

[0039] Adopt the technological process and catalyst packing with embodiment 1; At 400 ℃, 4.0Mpa, 4800h -1 Under the condition of controlling H 2 :CO=1:1, methane content was 20%, reacted for 20 hours, and the reaction product was monitored online by gas chromatography. The reaction results are shown in Table 1.

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Abstract

The invention discloses a process method for directly preparing olefin from synthesis gas, and the method comprises the following steps of: contacting a synthesis gas raw material with a catalyst, and carrying out reaction to obtain a product flow; separating the product flow to obtain carbon dioxide, an unreacted synthesis gas flow and a mixed hydrocarbon flow; and circulating at least part of the unreacted synthesis gas flow to the synthesis gas raw material to participate in reaction; wherein in the gas participating in the reaction, the methane content is less than 20% in terms of molar ratio. The method can inhibit the selectivity of CH4 to a certain extent while ensuring high selectivity and high conversion per pass of low-carbon olefins, can fully utilize the raw materials and improve the utilization rate of carbon in the raw material synthesis gas, and can be used for industrial production.

Description

technical field [0001] The invention relates to a process for directly producing olefins from synthesis gas, which belongs to the technical field of chemistry and chemical engineering. Background technique [0002] Energy is the foundation of national economic development. my country's energy characteristics are "rich in coal, short of oil." For a long time, the high dependence on foreign oil consumption has seriously restricted the stable development of the economy. How to carry out clean and efficient utilization of coal, natural gas and biomass has always been an important issue for my country's sustainable development. In principle, the industrialization prospect of direct conversion of coal, natural gas and biomass into chemicals is relatively slim. Therefore, it is particularly necessary to select a suitable conversion medium as a conversion platform for coal and natural gas utilization to realize chemical synthesis. In recent years, with the maturity of coal gasific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/04C07C11/04C07C11/06C07C11/08B01J29/83B01J29/85
CPCB01J29/83B01J29/85C07C1/043B01J2229/18C07C11/04C07C11/06C07C11/08Y02P20/00Y02P20/52
Inventor 苏俊杰王仰东刘苏周海波刘畅焦文千张琳
Owner CHINA PETROLEUM & CHEM CORP
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