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Method for producing liquefied petroleum gas

A technology of liquefied petroleum gas and manufacturing method, applied in the petroleum industry, hydrocarbon production from carbon oxides, gas fuel, etc.

Inactive Publication Date: 2006-03-22
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

[0216] use figure 1 The LPG manufacturing apparatus shown manufactures LPG. As a catalyst for olefin-containing gas synthesis, a dry standard 73.5% by weight of H-ZSM-5 with a Si / Al ratio (atomic ratio) of 25.0, and a dry standard 26.5% by weight of alumina bonded A catalyst obtained by mixing a mixture (manufactured by Catalyst Chemicals Industry Co., Ltd., Kataroid AP), wet molding, drying and firing. As the catalyst for the hydrogenation of the olefin-containing gas, a 2.0% by weight Pt / C catalyst (manufactured by N.E. CHEMCAT Co., Ltd.) was used. Both the catalyst for the synthesis of olefin-containing gas and the catalyst for hydrogenation of olefin-containing gas used the same 1 / 32-inch cylindrical extruded product.

[0217] Make the raw material gas that is composed of methanol 50% (mol) and hydrogen 50% (mol) pass through the front stage (50% of the reactor volume) as the first catalyst layer composed of the above-mentioned olefin-containing gas synthesis catalyst, a...

Embodiment 2

[0220] use figure 2 The LPG manufacturing apparatus shown manufactures LPG. As the catalyst for synthesizing olefin-containing gas, the same catalyst for synthesizing olefin-containing gas as in Example 1, and a catalyst in which 0.2% by weight of Pt was carried on the same catalyst for synthesizing olefin-containing gas as in Example 1 (hereinafter referred to as Catalysts for the isomerization and hydrogenation of olefin-containing gases). In addition, as the catalyst for hydrogenating olefin-containing gas, the same catalyst for hydrogenating olefin-containing gas as in Example 1 was used. In addition, the catalyst for isomerization and hydrogenation of olefin-containing gas is a catalyst for synthesis of olefin-containing gas having the function of a catalyst for hydrogenation of olefin gas.

[0221] Make the raw material gas of the same composition as in Example 1, the part that passes volume 2 / 3 from the reactor inlet is the above-mentioned olefin-containing gas synth...

Embodiment 3

[0225] use image 3 The LPG manufacturing apparatus shown manufactures LPG. As the catalyst for synthesizing olefin-containing gas, the same catalyst for synthesizing 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.

[0226] A raw material gas having a composition of 50% by mole of methanol and 50% by mole of water vapor was passed through the first catalyst layer composed of the above-mentioned catalyst for synthesizing olefin-containing gas. The conditions of the reaction are: reaction temperature: reactor inlet control temperature 330°C, maximum temperature of the catalyst layer 365°C; reaction pressure: methanol partial pressure 70kPa, relative to the catalyst in the first catalyst layer, the methanol liquid space-hour velocity i...

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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 petroleum-based or natural-gas-based hydrocarbons that are gaseous at normal temperature and pressure, and are compressed or cooled at the same time to form a liquid substance, and its main component is propane or butane. LPG, which can be stored and transported in a liquid state, is easy to transport, and unlike natural gas, which requires a pipeline when supplied, it can be supplied to any place in the form of a high-pressure gas storage cylinder. For this reason, LPG having propane as a main component, ie, propane gas, is widely used as a fuel for domestic and commercial use. Currently, propane gas is supplied to approximately 25 million households (more than 50% of all households) in Japan. In addition, LPG i...

Claims

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Application Information

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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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