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Isomerization catalyst and its application

A catalyst and isomerization technology, applied in physical/chemical process catalysts, isomerization hydrocarbon production, molecular sieve catalysts, etc., can solve problems such as low equilibrium concentration of isomerized products, impact on octane number, and impact on

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] USP4,232,181, GB1039246, GB1189850, USP4,665,272 and other patent documents have described the preparation method of this type of catalyst in detail, but because the application temperature of the zeolite-type dual-function catalyst is relatively high, and the equilibrium concentration of the isomer product at high temperature is low, Especially for n-hexane, a higher reaction temperature will affect the concentration of 2,2-dimethylbutane (2,2-DMB) in the isomerized product, and 2,2-DMB has a high octane number, If its concentration is reduced, it will directly affect the octane number of isomerized products

Method used

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Examples

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preparation example Construction

[0012] Provide a kind of specific preparation method of catalyst of the present invention below, but not limited to this method, concrete steps are:

[0013] (1) loading rare earth elements on mordenite, drying and roasting to obtain rare earth modified mordenite;

[0014] (2) fully mixing aluminum hydroxide, halogen compound, peptizing agent and deionized water to form a viscous substance, as a binder for preparing the catalyst of the present invention;

[0015] (3) fully kneading the rare earth modified mordenite prepared in step (1), the binder, extrusion aid and water prepared in step (2) into a plastic paste, extruded into strips, dried and roasted, Obtain catalyst carrier of the present invention;

[0016] (4) loading the element VIII and additives on the catalyst carrier prepared in step (3), drying and calcining to obtain the catalyst of the present invention.

[0017] In step (1), the rare earth element can be loaded on the molecular sieve by ion exchange method, im...

Embodiment 1

[0026] Example 1 (if there is no special note below, the percentages are percentages by weight)

[0027] The preparation steps of a kind of catalyst of the present invention are as follows:

[0028] (1) Take 300 grams of mordenite with a silicon-aluminum ratio of 18, and prepare 450 milliliters of lanthanum nitrate solution with a lanthanum oxide content of 50 grams. The above solution containing lanthanum nitrate and mordenite were fully mixed, dried at 110°C and calcined at 500°C for 4 hours to obtain lanthanum-modified mordenite, the composition of which was: lanthanum oxide / mordenite=1 / 6.

[0029] (2) 200 grams of ammonium chloride solution with a mass concentration of 10% (calculated as halogen), 450 grams (calculated as aluminum oxide) of aluminum hydroxide, 1000 ml of water and 60 ml of concentrated nitric acid (with a mass concentration of 66.5%), fully mix. A binder with a halogen mass content of 3.2% (calculated on a dry basis of the binder) was obtained.

[0030]...

Embodiment 2

[0033] The preparation of catalyst E-2 of the present invention

[0034] The preparation process of the catalyst E-2 of the present invention is the same as in Example 1, except that ammonium bromide is used instead of ammonium chloride, and cerium nitrate is used to replace lanthanum nitrate. The prepared catalyst of the present invention is numbered E-2, and its catalyst composition See Table 1, and the reaction results are shown in Table 2.

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PUM

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Abstract

The invention discloses an isomerization catalyst and its application. The catalyst comprises the following components by weight: 0.01%-5% of a group VIII noble metal element in the periodic table of elements, 10%-80% of rare earth modified mordenite, 0.1%-10% of an assistant, and the balance a binder with a halogen content of 0.5%-5%, as well as based on the weight of the rare earth modified mordenite, 5%-40% of a rare-earth oxide. The catalyst is used for an isomerization process of C4-C12 alkanes, has the characteristics of high catalytic activity and high iso-olefin selectivity, and can be used as a blending component for producing high octane gasoline.

Description

technical field [0001] The invention relates to a light hydrocarbon isomerization catalyst and its application, in particular, the invention relates to a catalyst suitable for C4-C12 normal paraffin isomerization and its application. Background technique [0002] Under certain conditions, n-alkanes are non-ideal components in petroleum products, and the isomerization reaction of n-alkanes is an important reaction in petroleum processing. Especially in catalytic gasoline blended with refinery residue, the content of sulfur and olefins is relatively high. Hydrodesulfurization and olefin reduction of gasoline can reduce the sulfur content to less than 10μg / g and the olefin content to less than 10v%, but at the same time significantly reduce the octane number. To reduce sulfur and olefins with little or no loss of octane, selective hydrocracking or isomerization is required. The RON of isoparaffins is much higher than that of normal paraffins with the same carbon number. For ...

Claims

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Application Information

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IPC IPC(8): B01J29/26B01J29/22C07C5/27C07C9/12C07C9/16
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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