Method for isomerization of hydrocarbon, andsolid acid catalyst and isomerization device for use therein

Abstract

A method for isomerization of a hydrocarbon which comprises providing a solid acid catalyst comprising a carrier containing a part comprising zirconia and / or hydrated zirconia and sulfuric acid carried thereon, and contacting the catalyst with a hydrocarbon material having a water content of 5 ppm by weight or less, preferably 1 ppm or less, to thereby produce isomerized hydrocarbons; and a system for practicing the method. The isomerization method does not need the introduction of a chlorine-containing compound during the course of isomerization and uses a catalyst having high activity. The isomerization system comprises a dehydrating apparatus for the material, a vessel for catalytic reaction filled with the above catalyst, a separator for separating a reaction product into the hydrogen to be recycled and a hydrocarbon product, and a compressor which compresses the recycle hydrogen to feed it to the vessel for catalytic reaction.

Description

technical field [0001] The present invention relates to a method for efficiently isomerizing hydrocarbons using a sulfuric acid-zirconia solid acid catalyst, a solid acid catalyst for isomerization and an isomerization device used in the method. Background technique [0002] The isomerization reaction of hydrocarbons such as petroleum fractions is an important reaction in the process of manufacturing high-octane gasoline-based fuels or chemical feedstocks. The isomerization reaction of n-butane is a particularly important reaction in the production of isobutane, which is a raw material for methyl-tert-butyl ether or alkylated gasoline, and in the production of gasoline-based fuel, the isomerization of naphtha Isomerization reactions are also particularly important reactions. [0003] Traditional hydrocarbon isomerization reactions are carried out by contacting a class of platinum-modified catalysts with hydrocarbons in the presence of hydrogen. Examples of said catalysts in...

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Problems solved by technology

Reactions catalyzed by platinum-zeolite catalysts are usually carried out using reaction raw materials containing tens of ppm of water, but it is not known whether the catalytic activity of the catalyst can be improved even if the water content in the reaction raw materials is reduced, and the catalytic activity of platinum-zeolite catalysts Typically much less active than platinum-alumina chloride catalysts

On the other hand, it is known that impurities such as moisture in the reaction raw material will cause the activity of the platinum-alumina chloride catalyst to decrease, so usually the moisture in the reaction raw material must be controlled below 0.5ppm, preferably 0.1ppm when performing the reaction the following

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