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Method for isomerization of light hydrocarbon

A technology for isomerization and light hydrocarbons, applied in organic isomerization, chemical instruments and methods, hydrogenation hydrocarbon production, etc., can solve the problems of low octane number of isomerization products, high reaction temperature, low catalyst activity, etc. To achieve the effect of increasing the isomerization rate, increasing the octane number, and increasing the activity

Active Publication Date: 2006-10-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, the activity of this type of catalyst is low, the isomerization reaction temperature is higher than that of the halogen-containing alumina catalyst, and the octane number of the isomerization product is also low

Method used

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  • Method for isomerization of light hydrocarbon

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preparation example Construction

[0016] The preparation method of the catalyst includes impregnating zirconium dioxide with sulfuric acid or ammonium sulfate aqueous solution with a concentration of 0.1-3.0 mol / L, then drying and roasting to obtain sulfate-supported zirconium dioxide, which is a solid superacid. In order to prevent the carbon deposition of the solid superacid in the isomerization reaction, the solid superacid is preferably impregnated with a VIII metal compound, and the liquid / solid ratio is 0.4 to 4.0:1, preferably 0.6 to 2.0: 1. After drying, bake at 500-700°C, preferably for 2-6 hours. The Group VIII metal compound used to prepare the immersion solution is preferably chloropalladium acid, chloroplatinic acid or ammonium chloroplatinate.

[0017] Described zirconium dioxide can adopt any known method to prepare, preferably adopt following method to prepare:

[0018] (1) Contact the soluble zirconium salt solution with the alkali solution to make the pH value 1.2 to 13.5 to generate zirconi...

example 2

[0030] Catalyst B was prepared according to the method of Example 1, except that the pH controlled during the preparation of the hydrogel of zirconium hydroxide was 8.5, and the hydrothermal treatment time was 6 hours. The zirconia in Catalyst B has both monoclinic and tetragonal phases, the content of active components and the ratio of monoclinic phase in zirconia are shown in Table 1.

example 3

[0032] Catalyst C was prepared according to the method of Example 1, except that concentrated ammonia water was added until the pH was 12, and then the resulting zirconium hydroxide hydrogel was hydrothermally treated at 150° C. for 20 hours. The zirconia in Catalyst C has both monoclinic and tetragonal phases, the content of active components and the ratio of monoclinic phase in zirconia are shown in Table 1.

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Abstract

The isomerization method for lighter hydrocarbons comprises: rectifying the material to remove water and isopentane; then, with carrring-SO42- ZrO2 as solid super acidic catalyst, taking hydroisomerization reaction. This invention can improve yield.

Description

technical field [0001] The invention relates to a method for isomerizing light hydrocarbons, specifically, a method for isomerizing light hydrocarbons using solid superacid as a catalyst. Background technique [0002] The isomerization of light hydrocarbons is one of the important processes for the development of clean fuels. The catalysts used are mainly divided into three types: molecular sieve catalysts, solid superacid catalysts and halogen-containing alumina catalysts. The catalysts can all support noble metal components. The use of halogen-containing alumina catalysts for isomerization of light hydrocarbons will cause equipment corrosion and environmental pollution because the halogens in alumina are more likely to be lost during the reaction. In order to prevent the loss of halogen in the catalyst, the water content in the raw material is very strict, and chlorine needs to be supplemented at any time during operation to maintain the acidity of the catalyst. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B37/08C07C5/13B01J21/06
Inventor 濮仲英于中伟潘晖华孙义兰张秋平
Owner CHINA PETROLEUM & CHEM CORP
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