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Catalyst for preparing tetrahydronaphthalene and decahydronaphthalene from technical naphthalene through hydrogenation, preparation and application

A catalyst, a technology for tetralin, applied in the field of aromatic hydrocarbon hydrogenation catalysts, can solve problems such as unfavorable production of tetralin and decalin, complex catalyst manufacturing process, harsh operating conditions, etc., and achieves overcoming harsh raw material requirements, activity and stability The effect of good performance and simple equipment

Active Publication Date: 2018-01-26
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing industrial hydrogenation of naphthalene to prepare tetrahydronaphthalene or decahydronaphthalene mainly has defects such as single product, harsh raw material requirements, complex catalyst manufacturing process, high production cost, harsh operating conditions, and short life cycle, which is not conducive to the industrial production of naphthalene. Hydronaphthalene and Decalin

Method used

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  • Catalyst for preparing tetrahydronaphthalene and decahydronaphthalene from technical naphthalene through hydrogenation, preparation and application
  • Catalyst for preparing tetrahydronaphthalene and decahydronaphthalene from technical naphthalene through hydrogenation, preparation and application
  • Catalyst for preparing tetrahydronaphthalene and decahydronaphthalene from technical naphthalene through hydrogenation, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation and application specific process of the present embodiment catalyst are as follows:

[0044] 1. Preparation of catalyst: Weigh 5.01g of basic nickel carbonate (3g of nickel oxide), 30.24g of ammonium metatungstate (26g of tungsten oxide), 100g of deionized water, and 0.2g of citric acid in an autoclave at 140°C Reaction 8h. The reaction product is taken out by filtration, washed with deionized water for 3-4 times, and then dried at 120°C. The dried metal oxide is ground into 150-200 mesh powder, then add 0.22g ammonium phosphate, 0.3gPEO (polyoxyethylene), 2gZSM-5 molecular sieve, and a certain amount of deionized water to knead the mud (the amount of deionized water According to the requirements of extrusion), the kneaded mud ball is aged for 2 hours and then extruded. The extrusion specification is ∮1.3×2-8mm clover type. After the extruded strips were dried at 120°C, they were finally calcined in a muffle furnace at 500°C for 4 hours to obtain a fin...

Embodiment 2

[0049] The preparation and application specific process of the present embodiment catalyst are as follows:

[0050] 1. Preparation of catalyst: Weigh 8.35g of basic nickel carbonate (5g of nickel oxide), 26.97g of ammonium molybdate (22g of molybdenum oxide), 100g of deionized water, and 0.4g of urea in an autoclave, and react at 180°C 12h. The reaction product is taken out by filtration, washed with deionized water for 3-4 times, and then dried at 120°C. Grind the dried metal oxide into 150-200 mesh powder, then add 5.5g phosphoric acid (concentration 85%), 0.03g PEG (polyvinyl alcohol), 65g pseudo-boehmite (400°C loss rate about 20%), and a certain amount of deionized water to knead the mud. The kneaded mud ball is aged for 2 hours and then extruded. The extrusion size is ∮1.3×2-8mm clover. After the extruded strips were dried at 120°C, they were finally calcined in a muffle furnace at 350°C for 4 hours to obtain a finished clover-type catalyst with a total mass of 76.8g. ...

Embodiment 3

[0055] This example is a comparative example of Example 2. On the basis of Example 2, no inorganic additive phosphoric acid and organic additive PEG are added. Other operations are completely consistent with Example 2. The influence of organic and inorganic additives on catalyst performance is investigated. .

[0056] The preparation and application specific process of the present embodiment catalyst are as follows:

[0057] 1. Preparation of catalyst: Weigh 8.35g of basic nickel carbonate (5g of nickel oxide), 26.97g of ammonium molybdate (22g of molybdenum oxide), 100g of deionized water, and 0.4g of urea in an autoclave, and react at 180°C 12h. The reaction product is taken out by filtration, washed with deionized water for 3-4 times, and then dried at 120°C. Grind the dried metal oxides into 150-200 mesh powders, knead the mud after adding 65g of pseudoboehmite (about 20% loss on ignition at 400°C) and a certain amount of deionized water, and knead the kneaded mud. Afte...

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Abstract

The invention provides a catalyst for preparing tetrahydronaphthalene and decahydronaphthalene from technical naphthalene through hydrogenation and belongs to the technical field of aromatic hydrogenation catalyst. The catalyst is prepared from active components, a binder, an organic auxiliary and an inorganic auxiliary, wherein the active components contain two or three of Ni, Mo and W and account for 35%-95% of the total mass of the catalyst in terms of metal oxide; the organic auxiliary is a water-soluble oxygen-containing compound accounting for 0.1%-1% of the total amount of the metal oxide; the inorganic auxiliary is one or a mixture of water-soluble salts and oxygen-containing acids of P, B and F and accounts for 0.1%-2% of the total mass of the catalyst, and the balance is the binder. The invention further provides a preparation method and an application of the catalyst. The catalyst is applied to preparation of tetrahydronaphthalene and decahydronaphthalene from technical naphthalene through hydrogenation. The catalyst has good activity and stability, the conversion rate of technical naphthalene reaches 98%, and the sum of selectivity of tetrahydronaphthalene and decahydronaphthalene is 98% or higher; meanwhile, the ratio of tetrahydronaphthalene to decahydronaphthalene in a product can be adjusted according to reaction conditions.

Description

technical field [0001] The invention belongs to the technical field of aromatic hydrocarbon hydrogenation catalysts, in particular to a catalyst, preparation and application of industrial naphthalene hydrogenation to produce tetrahydronaphthalene and decahydronaphthalene. Background technique [0002] Tetrahydronaphthalene and decahydronaphthalene are important organic chemical products with a wide range of uses. Tetralin, as an important fine chemical product, can be widely used in industrial fields such as paint, coating, printing ink, cemented carbide, medicine, papermaking, etc., and is also used in the production of tetralone. As an excellent organic solvent with high boiling point, decahydronaphthalene is not only the best solvent in the dry spinning process of polyethylene fiber production, but also an indispensable additive to improve the thermal stability of aviation kerosene. Because tetralin and decahydronaphthalene are widely used and are in great demand, they a...

Claims

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Application Information

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IPC IPC(8): B01J29/48B01J27/19B01J23/883B01J23/888B01J37/10B01J37/08B01J37/20C07C15/24C07C5/11C07C5/10
Inventor 向建安苏敏张明胜赵丹李启强颜智张新波
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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