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Catalyst used for reaction for preparing tetrahydronaphthalene through naphthalene hydrogenation and preparation method and application of catalyst

A technology of catalyst and tetralin, which is applied in the field of catalyst and its preparation for the reaction of hydrogenation of naphthalene to prepare tetralin, can solve the problem of poor selectivity of tetralin in conversion rate of naphthalene, complex processing of tetralin, and the purity of crude naphthalene Low-level problems, to achieve the effect of good activity and stability, convenient operation, and expand the range of raw materials

Active Publication Date: 2017-04-19
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Crude naphthalene has low purity and many impurities, and the preparation of tetralin by using existing catalysts is complicated in processing, and the conversion rate of naphthalene and the selectivity of tetralin are not good

Method used

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  • Catalyst used for reaction for preparing tetrahydronaphthalene through naphthalene hydrogenation and preparation method and application of catalyst
  • Catalyst used for reaction for preparing tetrahydronaphthalene through naphthalene hydrogenation and preparation method and application of catalyst
  • Catalyst used for reaction for preparing tetrahydronaphthalene through naphthalene hydrogenation and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of catalyst: 4g of ammonium phosphate is loaded on 100g of γ-Al by equal volume impregnation 2 o 3 , dried at 110°C and then calcined at 350°C for 2 hours to obtain a phosphorus-containing carrier. Load 22.8g of nickel nitrate hexahydrate on the phosphorus-containing carrier gold by equal volume impregnation method, dry at 110°C and then roast at 550°C for 4 hours to obtain the original catalyst; then use equal volume impregnation method to add 30.5g Ammonium molybdate was loaded on the original catalyst, dried at 110°C and then calcined at 550°C for 4 hours to obtain a powder catalyst. The powdered catalyst is pressed into tablets, crushed and screened to obtain a granular catalyst with a particle size of 1-2mm for future use. The active component content of the catalyst is 17.5%, and the additive content is 0.5%.

[0035] (2) Sulfidation of the catalyst: 10 ml of the granular catalyst was packed in a fixed-bed reactor, and a layer of 2 cm thick quar...

Embodiment 2

[0038](1) Catalyst preparation: load 2g of ammonium tetraborate on 100g of β zeolite by equal volume impregnation, dry at 110°C and then roast at 300°C for 2h to obtain a boron-containing carrier. Load 30.5g of ammonium molybdate tetrahydrate on a boron-containing carrier by equal-volume impregnation, dry at 110°C and then roast at 500°C for 4 hours to obtain the original catalyst; Nickel nitrate in water was supported on the original catalyst, dried at 110°C and then calcined at 550°C for 4 hours to obtain a powder catalyst. The powdered catalyst is pressed into tablets, crushed and screened to obtain a granular catalyst with a particle size of 1-2mm for future use. The active component content of the catalyst is 17.5%, and the additive content is 0.3%.

[0039] (2) Sulfidation of the catalyst: 10 ml of the granular catalyst was packed in a fixed-bed reactor, and a layer of 2 cm thick quartz sand was laid on the upper and lower sides of the granular catalyst. After loading ...

Embodiment 3

[0042] (1) Catalyst preparation: load 4 g of ammonium phosphate on 100 g of mordenite by equal-volume impregnation, dry at 110° C., and then roast at 350° C. for 2 hours to obtain a phosphorus-containing carrier. 22.8g of nickel nitrate hexahydrate and 33.55g of ammonium tungstate were loaded on the phosphorus-containing carrier at the same time by the method of equal volume impregnation, dried at 110°C and then roasted at 550°C for 4 hours to obtain the original catalyst; then impregnated with equal volume The method is to load 30.5g of ammonium molybdate tetrahydrate on the original catalyst, dry it at 110°C and then bake it at 550°C for 4h to obtain a powder catalyst. The powdered catalyst is pressed into tablets, crushed and screened to obtain a granular catalyst with a particle size of 1-2mm for future use. The active component content of the catalyst is 30.8%, and the additive content is 0.4%.

[0043] (2) Sulfidation of the catalyst: 10 ml of the granular catalyst was ...

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Abstract

The invention discloses a catalyst used for a reaction for preparing tetrahydronaphthalene through naphthalene hydrogenation and a preparation method and application of the catalyst. The catalyst comprises a catalyst carrier, active components and auxiliaries, and the active components and the auxiliaries are loaded on the catalyst carrier. The catalyst is good in activity and stability, is not high in requirement for raw materials, and is applicable to the reaction for preparing the tetrahydronaphthalene through naphthalene hydrogenation, wherein the naphthalene content is larger than or equal to 94%, the naphthalene conversion rate can be higher than 95%, and the selectivity of the tetrahydronaphthalene is higher than 85%. A preparation process of the catalyst is simple, scientific and convenient to operate, equipment is simple, and the investment cost is low.

Description

technical field [0001] The invention belongs to the field of energy catalysis, especially the field of hydrogenation of aromatic hydrocarbons, and in particular relates to a catalyst for hydrogenation of naphthalene to prepare tetrahydronaphthalene, a preparation method and application thereof. Background technique [0002] Tetrahydronaphthalene is an important organic chemical raw material, which is widely used in medicine, pesticide, energy, chemical industry and other industries, and is in great demand. At present, the supply of tetrahydronaphthalene is in short supply in my country, and a large amount of import is required, so its price is expensive. Tetrahydronaphthalene is mainly produced by catalytic hydrogenation of naphthalene. my country has abundant naphthalene resources, which are mainly obtained by separation and purification of coal tar. According to its purity, it can be divided into crude naphthalene and refined naphthalene. Crude naphthalene is cheaper th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J27/188B01J27/19B01J29/26B01J29/48B01J29/78B01J37/02C07C5/11C07C13/48
Inventor 向建安张新波张明胜苏敏
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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