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A kind of dehydrogenation catalyst and its preparation and use method

A dehydrogenation catalyst, catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems to be improved, and achieve significant social and economic benefits. benefit, optimize utilization, mitigate the effects of increased demand

Active Publication Date: 2018-01-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As shown in Table 4 of Example 3 of this patent, the selectivity and conversion rate were respectively 99.3% and 40.4% after the evaluation time of 45h; after the evaluation time of 96h, the selectivity and conversion rate were respectively 98.7% and 41.6%; After the evaluation time of 168h, the selectivity and conversion rate were 98.6% and 43.6% respectively; after the evaluation time of 220h, the selectivity and conversion rate were respectively 97.4% and 41.0%. and stability still needs to be improved

Method used

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  • A kind of dehydrogenation catalyst and its preparation and use method
  • A kind of dehydrogenation catalyst and its preparation and use method
  • A kind of dehydrogenation catalyst and its preparation and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present invention uses γ-Al 2 o 3 The carrier is prepared by known methods, and can be processed into any form by known methods. What this embodiment used is the average length 4mm, the bar shape γ-Al of average diameter 2mm 2 o 3 .

[0038] Take the strip γ-Al 2 o 3 The cerium nitrate solution is impregnated by an equal volume impregnation method, so that the carrier is loaded with cerium, dried at 120°C for 10 hours, and calcined at 600°C for 6 hours.

[0039] The above-mentioned cerium-loaded strip-shaped γ-Al 2 o 3 The carrier is impregnated with a solution of potassium nitrate and magnesium nitrate in an equal volume, so that the carrier is loaded with potassium and magnesium, dried at 120° C. for 10 hours, and calcined at 600° C. for 6 hours.

[0040] The strip-shaped γ-Al loaded with metal cerium, potassium and magnesium 2 o 3 The carrier is then impregnated with ethanol hydrochloric acid solution containing platinum salt, tin salt and zirconium sal...

Embodiment 2

[0043] Take a spherical γ-Al with a diameter of 2mm 2 o 3 The lanthanum nitrate solution is impregnated by an equal volume impregnation method, so that the carrier is loaded with lanthanum, dried at 120°C for 10 hours, and calcined at 600°C for 6 hours.

[0044] The above-mentioned spherical γ-Al loaded with lanthanum 2 o 3 The carrier is impregnated with a solution of potassium nitrate and magnesium nitrate in an equal volume, so that the carrier is loaded with potassium and magnesium, dried at 120° C. for 10 hours, and calcined at 600° C. for 6 hours.

[0045] The above spherical γ-Al loaded with lanthanum, potassium and magnesium 2 o 3 The carrier is impregnated with an equal volume of hydrochloric acid ethanol solution containing platinum salt, tin salt and zirconium salt, wherein the volume ratio of concentrated hydrochloric acid (36-38% by mass) and absolute ethanol in the hydrochloric acid ethanol solution is 1:3, The carrier is loaded with platinum, tin and zircon...

Embodiment 3

[0048] Take a clover-shaped γ-Al with a length of 4mm and a diameter of 2mm 2 o 3 The cerium nitrate solution is impregnated by an equal volume impregnation method, so that the carrier is loaded with cerium, dried at 120°C for 10 hours, and calcined at 600°C for 6 hours.

[0049] The above-mentioned clover-like γ-Al loaded with metal cerium ions 2 o 3 The carrier is impregnated with a solution of potassium nitrate and magnesium nitrate in an equal volume, so that the carrier is loaded with potassium and magnesium, dried at 120° C. for 10 hours, and calcined at 600° C. for 6 hours.

[0050] The above-mentioned γ-Al strips loaded with cerium, potassium and magnesium 2 o 3 The carrier is impregnated with an equal volume of hydrochloric acid ethanol solution containing platinum salt, tin salt and zirconium salt, wherein the volume ratio of concentrated hydrochloric acid (36-38% by mass) and absolute ethanol in the hydrochloric acid ethanol solution is 2:4, Make the carrier lo...

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Abstract

The invention relates to a dehydrogenation catalyst. The dehydrogenation catalyst comprises (a) aluminum oxide which is used as a carrier, wherein the bulk density of the carrier is 0.4g / ml-0.6g / ml and the specific surface area of the carrier is 100m<2> / g-300m<2> / g; (b) metal platinum which is used as an active component, wherein the metal platinum accounts for 0.3%-0.5% of the total mass of the catalyst; (c) tin, alkaline metal, alkaline-earth metal, zirconium and at least one type of rare-earth metal which are used as an accelerant, wherein in the accelerant, the tin accounts for 0.6%-1.0% of the total mass of the catalyst, the zirconium accounts for 0.1%-1.0% of the total mass of the catalyst, the alkaline metal accounts for 0-2% of the total mass of the catalyst, the alkaline-earth metal accounts for 0-2% of the total mass of the catalyst, and the rare-earth metal accounts for 0.1%-1.0% of the total mass of the catalyst; and (d) halogen which is used as a modifying agent, wherein the halogen accounts for 0.05%-0.5% of the total mass of the catalyst. The invention further relates to preparation and application methods of the catalyst.

Description

technical field [0001] The invention relates to a catalyst for preparing isobutene by catalytic dehydrogenation of isobutane, a preparation method thereof and a catalytic dehydrogenation process. Background technique [0002] Isobutylene is a very important organic chemical raw material, and its demand has always maintained a growing trend in the world. It can not only be used to produce isoprene rubber, butyl rubber, polyisobutylene and other elastomers, but also can be used to make gasoline and lubricating oil It can also be used as a raw material for other fine chemical products. At present, isobutene has become one of the most popular fine chemical products in the world, but there is a big gap in the supply of isobutene. Among the isobutene production routes, the one with the greatest growth and potential is the isobutane dehydrogenation process. The isobutane dehydrogenation reaction is controlled by thermodynamic equilibrium, and the harsh conditions of high temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63C07C11/09C07C5/333
Inventor 纪玉国季静柴忠义杜周张富春
Owner CHINA PETROLEUM & CHEM CORP
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