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Catalyst for preparing decahydronaphthalene by hydrogenation of tetrahydronaphthalene, preparation method and application thereof

A catalyst, a technology for hydrogen preparation, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. The problems of low trans-cis ratio of naphthalene and easy poisoning of the catalyst can increase the stability, improve the yield and purity, and reduce the dosage.

Active Publication Date: 2019-10-18
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, no matter the prior art adopts one-step method or two-step method, in addition to shortcomings such as easy poisoning of the catalyst, short service life, low purity, etc., there is also the problem that the trans-cis ratio of decahydronaphthalene is low (almost all lower than 4). problems, unable to meet the market demand for high-stability decahydronaphthalene products

Method used

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  • Catalyst for preparing decahydronaphthalene by hydrogenation of tetrahydronaphthalene, preparation method and application thereof
  • Catalyst for preparing decahydronaphthalene by hydrogenation of tetrahydronaphthalene, preparation method and application thereof
  • Catalyst for preparing decahydronaphthalene by hydrogenation of tetrahydronaphthalene, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Al 2 o 3 The carrier was ball milled for 5 hours, passed through a 200-mesh sieve, and then calcined in an air atmosphere at 450°C for 5 hours to obtain carrier A1;

[0049] (2) Weigh 11.5g of magnesium nitrate hexahydrate and dissolve it in 50ml of deionized water to obtain an additive solution, adjust its pH value to 4 with nitric acid solution, and place it in a 2.5L plastic beaker; weigh 28.11g of carrier A1 and quickly pour Stir in a plastic beaker for 30 minutes, then stand at room temperature for 12 hours, dry in an oven at 100°C for 12 hours, take it out and bake it in an air atmosphere at 450°C for 5 hours to obtain carrier B1;

[0050] (3) Weigh 2 g of palladium dichloride and dissolve it in 200 ml of deionized water, add hydrochloric acid solution dropwise to adjust its pH to 4, and obtain (a) solution. Measure 15ml of (a) solution into a 2.5L plastic beaker, then add 35ml of deionized water and stir; quickly pour the carrier B1 prepared in (2) into the...

Embodiment 2

[0053] (1) Al 2 o 3 The carrier was ball milled for 5 hours, passed through a 200-mesh sieve, and then calcined in an air atmosphere at 450°C for 5 hours to obtain carrier A2;

[0054] (2) Take by weighing 4.5g of cerium nitrate hexahydrate and dissolve it in 50ml of deionized water to obtain an additive solution, adjust its pH value to 4 with nitric acid solution, place it in a 2.5L plastic beaker; weigh 28.11g of carrier A2 and quickly pour Put it into a plastic beaker and stir for 30 minutes, then leave it to age at room temperature for 12 hours, dry it in an oven at 100°C for 12 hours, take it out and bake it in an air atmosphere at 450°C for 5 hours to obtain carrier B2;

[0055] (3) Measure 15ml of the solution (a) prepared in Case 1 and add it to a 2.5L plastic beaker, then add 35ml of deionized water and mix well; quickly pour the carrier B2 prepared in (2) into the plastic beaker Stir and mix for 30 minutes, then stand and age at room temperature for 12 hours, and d...

Embodiment 3

[0058] (1) Al 2 o 3 The carrier was ball milled for 5 hours, passed through a 200-mesh sieve, and then calcined in an air atmosphere at 450°C for 5 hours to obtain carrier A3;

[0059](2) Dissolve 6.3g of zirconium nitrate pentahydrate in 50ml of deionized water to obtain an additive solution, adjust its pH value to 4 with nitric acid solution, place it in a 2.5L plastic beaker; weigh 28.11g of carrier A3 and quickly pour it into the plastic Stir and mix in a beaker for 30 minutes, then stand and age at room temperature for 12 hours, dry in an oven at 100°C for 12 hours, take it out and bake it in an air atmosphere at 450°C for 5 hours to obtain carrier B3;

[0060] (3) Measure 25ml of the solution (a) prepared in Case 1 and add it to a 2.5L plastic beaker, then add 25ml of deionized water and stir to mix; quickly pour the carrier B3 prepared in (2) into the plastic beaker Stir and mix for 30 minutes, then stand and age at room temperature for 12 hours, and dry at 120°C for ...

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Abstract

The invention discloses a catalyst for hydrogenation preparation of decahydronaphthalene from tetrahydronaphthalene and a preparation method and application thereof. The catalyst consists of an activecomponent, an auxiliary agent and a carrier; by an equal-volume impregnation method, the active component and the auxiliary agent are distributed on the carrier more uniformly, so that the dispersityof the active component and the auxiliary agent is improved, the using amount of the active component is reduced, and the rans- / cis-ratio of the decahydronaphthalene is increased; the active component is Pt, Pd or the like, the auxiliary agent is oxide of Zn, Ni, Mg, Ce, Zr, La, Fe, Cu or Co; the carrier is one or a combination of several of Al2O3, SiO2, TiO2 and ZSM-5 molecular sieves. The catalyst provided by the preparation method provided by the invention can be used as a two-stage hydrogenation catalyst in a two-step method, and is low in noble metal content and high in catalytic activity; a reaction condition is moderate; the preparation method is simple and feasible; the catalyst is good in economic benefits, and has a relatively good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a catalyst for hydrogenating tetralin to prepare decahydronaphthalene, a preparation method and application thereof. Background technique [0002] Decalin is a high-performance solvent, mainly used for dry spinning polyethylene fiber, as aviation kerosene and battery hydrogen storage materials. Trans-decalin has high thermal stability, which is an essential substance to improve the thermal stability of aviation kerosene, and can also be used as a raw material for preparing high-quality liquid crystal materials; cis-decalin is mainly used to produce sebacic acid and then produce Nylon 6, Nylon 10 and plasticizers. The trans-cis ratio of decahydronaphthalene sold in the market is between 2-4. The higher the trans-cis ratio of decahydronaphthalene, the higher the stability and the higher the price, but the preparation is more difficult. At present, there i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J23/60B01J23/63B01J23/89C07C5/10C07C13/50
Inventor 张明胜向建安苏敏赵丹李启强颜智张新波
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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