Method for producing liquefied petroleum gas

A technology of liquefied petroleum gas and manufacturing method, which is applied in the petroleum industry, producing hydrocarbons from carbon oxides, gas fuel, etc.

Inactive Publication Date: 2009-01-28
TOKAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the selectivity of propane (C3) and butane (C4) produced by this method is only about 63-74%, and it is difficult to say that such a product is suitable for LPG products.

Method used

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  • Method for producing liquefied petroleum gas
  • Method for producing liquefied petroleum gas
  • Method for producing liquefied petroleum gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0208] use figure 1 The LPG manufacturing apparatus shown produces LPG. As a catalyst for olefin-containing gas synthesis, a dry standard 73.5% by weight of H-ZSM-5 having a Si / Al ratio (atomic ratio) of 25.0 and a dry standard 26.5% by weight of alumina viscosity were used. A catalyst prepared by mixing, wet-forming, drying, and calcining a mixture (Catalyzed Chemical Industry Co., Ltd., Kataroide AP). As the catalyst for the hydrogenation of the olefin-containing gas, a 2.0% by weight Pt / C (manufactured by N.E. CHEMCAT (Epi-Tech Co., Ltd.)) was used. Both the catalyst for olefin-containing gas synthesis and the catalyst for olefin-containing gas hydrogenation were extruded molded articles having the same shape as 1 / 32-inch cylinders.

[0209] The raw material gas with the composition of methanol 50% (mol) and hydrogen 50% (mol) was passed through the first catalyst layer in the first stage (50% of the reactor volume) composed of the above-mentioned catalyst for synthesizin...

Embodiment 2

[0212] use figure 2 The LPG manufacturing apparatus shown produces LPG. As the catalyst for synthesizing olefin-containing gas, the same catalyst for synthesizing olefin-containing gas as in Example 1, and the same catalyst for synthesizing olefin-containing gas as in Example 1 were used to support 0.2% by weight of Pt (hereinafter referred to as Catalysts for the isomerization and hydrogenation of olefin-containing gases). In addition, the same catalyst for hydrogenation of olefin-containing gas as in Example 1 was used as the catalyst for hydrogenation of olefin-containing gas. Further, the catalyst for isomerization and hydrogenation of olefin-containing gas is a catalyst for olefin-containing gas synthesis having the function of a catalyst for hydrogenation of olefin-containing gas.

[0213] The raw material gas having the same composition as in Example 1, the part that passes through the reactor inlet by volume 2 / 3 is the above-mentioned catalyst for olefin-containing ...

Embodiment 3

[0217] use image 3 The LPG manufacturing apparatus shown produces LPG. As the catalyst for synthesizing an olefin-containing gas, the same catalyst for synthesizing an olefin-containing gas as in Example 1 was used. As the catalyst for hydrogenation of olefin-containing gas, the same catalyst for hydrogenation of olefin-containing gas as in Example 1, and the same catalyst for isomerization and hydrogenation of olefin-containing gas as in Example 2 were used.

[0218] A raw material gas having a composition of 50 mol% of methanol and 50 mol% of steam was passed through the first catalyst layer composed of the above-mentioned catalyst for synthesizing an olefin-containing gas. The reaction conditions are: the reaction temperature: the control temperature of the reactor inlet is 330°C, the maximum temperature of the catalyst layer is 365°C; the reaction pressure: the partial pressure of methanol is 70kPa, and the space-time velocity of methanol liquid is 40H relative to the ca...

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Abstract

A liquefied petroleum gas containing propane or butane as a main component is produced by passing a raw material gas comprising hydrogen and at least one selected from the group consisting of methanol and dimethyl ether through a catalyst layer comprising, in the direction of flowing of the raw material gas, a former catalyst layer comprising a catalyst for synthesizing an olefin-containing gas which is used when producing an olefin-containing gas from at least one selected from the group consisting of methanol and dimethyl ether, and a latter catalyst layer comprising a catalyst for hydrogenating an olefin-containing gas which is used when an olefin is hydrogenated to produce a paraffin.

Description

technical field [0001] The present invention relates to a method for producing liquefied petroleum gas whose main component is propane or butane from at least one of methanol and dimethyl ether. Background technique [0002] Liquefied petroleum gas (LPG) refers to a liquid substance formed by compression or simultaneous cooling of petroleum-based or natural-gas-based hydrocarbons that are gaseous at normal temperature and pressure. The main component is propane or butane. LPG that can be stored and transported in a liquid state is easy to transport, and unlike natural gas that needs to be supplied with pipelines, it can be supplied to any place in the form of high-pressure gas storage cylinders. For this reason, LPG containing propane as a main component, that is, propane gas is widely used as a fuel for domestic and commercial use. Currently, in Japan, propane gas is supplied to approximately 25 million households (more than 50% of all households). In addition, LPG can be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/12C07C9/08C07C9/10C07C1/04
Inventor 浅冈佐知夫黎晓红藤元薰朝见贤二
Owner TOKAI
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