Catalyst used for cracking gusoline selective hydrogenation, its preparation method and use

A technology for pyrolysis gasoline and selective hydrogenation, which is applied in the field of catalysts for selective hydrogenation of pyrolysis gasoline, its preparation and application, and can solve the problems of low-temperature activity and selectivity of catalysts that need to be improved

Inactive Publication Date: 2003-07-16
RES INST OF BEIJING YANSHAN PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low-temperature activity and selectivity of the catalysts used in this method need to be improved

Method used

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Examples

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Effect test

preparation example Construction

[0021] In the preparation method of the catalyst of the present invention, the titanium compound used is a titanium salt selected from titanium acetate, hydrochloride, sulfate and nitrate or selected from tetraethyl titanate, tetra-n-propyl titanate and titanium Tetrabutyl titanate. The volume of the titanium compound solution is equal to or larger than the total pore volume of alumina. Preferably, the volume of the titanium compound solution is equal to the total pore volume of alumina. If the amount of titanium compound solution is greater than the total pore volume of alumina, the mixture must be filtered and drained after impregnation, and then dried. The solvent used for preparing the titanium compound solution depends on the specific kind of the titanium compound used, for example, when the titanium compound used is acetate, hydrochloride, sulfate or nitrate of titanium, it is preferred to use water or an aqueous acid such as dilute sulfuric acid, Dilute nitric acid, d...

Embodiment 11

[0030] Example 11. Preparation of carrier

[0031] Take the specific surface area as 160 meters 2 90 g of clover-shaped alumina with a pore volume of 0.58 ml / g and a most probable pore diameter of 130 angstroms, impregnated with 0.557 g / ml dilute sulfuric acid solution of 53 ml of titanium sulfate, stirred for 15 minutes, and dried at 120°C for 8 After 1 hour, it was fired at 900° C. for 4 hours to obtain a titanium oxide-alumina composite (A-1). The obtained composite has a titanium oxide content of 10% by weight and a specific surface area of ​​144 m 2 / g, the pore volume is 0.56 ml / g, and the most probable pore diameter is 125 angstroms. 2. Catalyst preparation

[0032]100 grams of previously prepared titania-alumina composite carrier (A-1) was pre-soaked with 160 milliliters of deionized water for 0.5 hour, filtered and drained, and immersed in 0.636 grams / 100 milliliters of aqueous solution of 80 milliliters of palladium chloride In, ta...

Embodiment 21

[0033] Example 21. Preparation of carrier

[0034] Immerse 56 milliliters of tetraethyl titanate in 0.518 g / ml cyclohexane solution into 90 g of the alumina used in Example 1, stir for 10-20 minutes, dry at 120°C for 6 hours, and then bake at 600°C for 4 hours. A titanium oxide-alumina composite (A-2) was obtained. The obtained composite has a titanium oxide content of 10% by weight and a specific surface area of ​​144 m 2 / g, the pore volume is 0.56 ml / g, and the most probable pore diameter is 125 angstroms. 2. Catalyst Preparation

[0035] 100 grams of the previously prepared titania-alumina composite carrier (A-2) was pre-soaked with 150 milliliters of deionized water for 0.5 hour, filtered and dried, and immersed in 0.636 grams / 100 milliliters of aqueous solution of 80 milliliters of palladium chloride In the process, take it out after 1 hour, reduce it with 150 ml of 40% (weight) hydrazine hydrate for 1 hour, wash the chloride ions with d...

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Abstract

A selective hydrocatalyst for cracking gasoline is composed of the titanium oxide-aluminium oxide compound as carrier and palladium as active component (0.25-0.35 wt.%). Its advantages are high spacespeed of liquid phase (in creased by 30-40 %), high selectivity (99% or more), and high activity stability.

Description

technical field [0001] The present invention relates to a kind of catalyst for selective hydrogenation of petroleum hydrocarbons, more specifically to a kind of catalyst with aluminum oxide compound containing titania as carrier and metal palladium as active component, mainly used for pyrolysis gasoline (C 6 ~C 8 Distillate) one-stage hydrofining to convert highly unsaturated hydrocarbons, such as chain conjugated dienes, styrene, and cyclic conjugated dienes, into monoolefins, and can also be used for alkynes or diolefins of other petroleum hydrocarbons Choose hydrogenation. The invention also relates to the preparation method and application of the catalyst. Background technique [0002] At present, the catalysts used in the first-stage hydrogenation of pyrolysis gasoline in industry mainly include Ni / Al 2 o 3 or Pd / Al 2 o 3 , the general feed space velocity is 3.0 hours -1 Below, and the catalyst's hydrogenation activity and diene hydrogenation selectivity are poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/40
Inventor 柴忠义王振龙魏墨培任玉梅张富春
Owner RES INST OF BEIJING YANSHAN PETROCHEM
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