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Method for isomerization of light hydrocarbon

A technology for isomerization and light hydrocarbons, which is used in organic isomerization, chemical instruments and methods, and hydrogenation to hydrocarbon production, etc., and can solve the problems of low catalyst activity, high reaction temperature, and low octane number of isomerized products. Achieve the effect of increasing isomerization rate, increasing octane number and increasing activity

Active Publication Date: 2008-06-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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Effect test

preparation example Construction

[0016] The preparation method of the above catalyst includes impregnating zirconium dioxide with an aqueous solution of sulfuric acid or ammonium sulfate with a concentration of 0.1-3.0 mol / L, then drying and calcining to obtain sulfate-loaded zirconium dioxide, which is a solid super acid. In order to prevent the solid superacid from depositing carbon in the isomerization reaction, preferably the solid superacid is impregnated with a Group VIII metal compound, and the liquid / solid ratio during impregnation is 0.4-4.0:1, preferably 0.6-2.0: 1. After drying, calcinate at 500-700°C, and the calcining time is preferably 2-6 hours. The Group VIII metal compound used to formulate the immersion solution is preferably chloropalladic acid, chloroplatinic acid or ammonium chloroplatinate.

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

[0018] (1) Contact the soluble zirconium salt solution with the alkali...

example 1

[0028] Preparation of solid acid catalysts.

[0029] Take 100 grams of zirconium oxychloride (ZrOCl 2 ·8H 2 0), add an appropriate amount of deionized water to be made into a 25% by mass aqueous solution, drip 25% by mass of concentrated ammonia water to a pH of 10, transfer the generated zirconium hydroxide hydrogel to a pressure vessel and seal it, 90 ° C of water Heat treated for 20 hours, washed and filtered until the filtrate was neutral with no detectable chloride ions, and the solid was dried at 110°C for 48 hours. Take 10 g and grind it into powder, add 8 ml of 1 mol / L sulfuric acid, place at room temperature for 1 hour, and dry at 110 °C for 24 hours. H with a platinum content of 3.77 mg / ml 2 PtCl6 6.4 ml of the solution was soaked for 1 hour, dried at 110°C for 12 hours, and calcined at 600°C for 4 hours to obtain catalyst A, in which zirconia had both monoclinic and tetragonal phases. The active component content of catalyst A and the proportion of monoclinic ph...

example 2

[0031] Catalyst B was prepared according to the method of Example 1, except that the pH controlled during the preparation of the zirconium hydroxide hydrogel was 8.5, and the hydrothermal treatment time was 6 hours. The zirconia in catalyst B has both monoclinic and tetragonal phases, and the active component content and the 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 present invention relates to a light hydrocarbon isomerization method, specifically, a light hydrocarbon isomerization method using a solid super acid as a catalyst. Background technique [0002] Light hydrocarbon isomerization is one of the important processes for developing clean fuels. The catalysts used are mainly divided into three types: molecular sieve catalysts, solid superacid catalysts and halogen-containing alumina catalysts, all of which can support precious metal components. The use of halogen-containing alumina catalysts for light hydrocarbon isomerization will cause equipment corrosion and environmental pollution because halogens in alumina are easily lost during the reaction process. 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 proper acidity of the catalyst. Therefore, the technologic...

Claims

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Application Information

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Patent Type & Authority Patents(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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