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Method for preparing liquefied petroleum gas by a two-step method

A technology of liquefied petroleum gas and step method, which is applied in the petroleum industry, gas fuel, fuel, etc., can solve the problem that the output cannot meet the time requirement, and achieve the effect of suppressing the formation of carbon deposits, improving the stability, and optimizing the reaction conditions.

Pending Publication Date: 2021-06-18
大庆金星燃气股份有限公司
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Problems solved by technology

At present, LPG mainly comes from oilfield associated gas and refinery petroleum gas, and its output can no longer meet the growing demand for time. There is an urgent need to develop non-petroleum resources to produce LPG technology. This paper can be derived from the synthesis of coal, natural gas and biomass Using gas as raw material, the two-step process LPG was prepared

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  • Method for preparing liquefied petroleum gas by a two-step method
  • Method for preparing liquefied petroleum gas by a two-step method

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Embodiment Construction

[0020] Next, further description will be made in conjunction with the accompanying drawings and specific embodiments:

[0021] See Figure 1-2 , A method of preparing liquefied petroleum gas according to an embodiment of the present invention, including:

[0022] (1) The first step of reaction: The syngas is converted into methanol and DMF in a reactor with a syngas as a raw material.

[0023] (2) Second step reaction: The methanol and DME obtained by step (1) are converted into hydrocarbons in the segment reactor, and the main component is C. 3 And C 4， That is, liquefied petroleum gas.

[0024] The method of preparing liquefied petroleum gas according to claim 1, wherein the methanol is formed in a reactor and converted to DME, methanol dewatering under the action of dehydration. DME. It can be carried out at a temperature below 250 ° C, so that the sintering of the Cu in the methanol synthesis catalyst can be slowed while ensuring the CO conversion.

[0025] The method of prepar...

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Abstract

The invention discloses a method for preparing liquefied petroleum gas by a two-step method, which comprises the following steps of: preparing the liquefied petroleum gas by a one-step method on a Gu-Zn-Al / Pd-Y composite catalyst by taking synthesis gas obtained by partial oxidation of methane and air as a raw material, under the conditions of 290 DEG C, 3.6 MPa and 1500h <-1 >, enabling the CO conversion per pass and the selection of LPG in hydrocarbons to be more than 70%, and keeping the CO conversion per pass and the LPG to be relatively stable within the reaction time of 100h. The cheap synthesis gas is directly used for the development of the liquefied petroleum gas synthesis methane air partial oxidation / liquefied petroleum gas synthesis integrated process, DME and a small amount of formaldehyde are dehydrated and converted into hydrocarbons at high temperature in the second-section reactor, high temperature accelerates the cracking of high-carbon hydrocarbons at the moment, the generation of carbon deposition is inhibited, the stability of the molecular sieve is improved, the reaction conditions of two-step preparation of the liquefied petroleum gas are optimized, the stability of the two-step process is investigated, and the two-stage catalyst is regenerated.

Description

Technical field [0001] The present invention relates to a method of preparing liquefied petroleum gas in a synthesis, and in particular, a method of preparing liquefied petroleum gas in two-step method. Background technique [0002] Liquefied petroleum gas (LPG) is the general term of propane and butane, including small amount of propylene, butene, is an environmentally friendly fuel, widely used in motor vehicle cleaning fuel, industrial, agricultural and household fuel, chemical production raw materials, liquefied petroleum gas (LPG) As a basic chemical raw material and cleaning fuel, the application prospect is very broad. At present, LPG is mainly due to oilfield accompanied by angry and refinery petroleum gas. Its production has not met the growing time-to-grow demand, which urgently needs to develop non-oil resources to produce LPG process technology. This paper can be derived from coal, natural gas and biomass synthesis. The gas is prepared for the raw material, and the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/12
CPCC10L3/12
Inventor 刘艳海
Owner 大庆金星燃气股份有限公司
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