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Roasting-free hydrogenation catalyst and its preparation method and application

A hydrogenation catalyst, roasting-free technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Insufficient stability and other problems, to achieve obvious thermal conductivity advantages, increase the active specific surface, improve the performance of sulfur and nitrogen resistance and regeneration performance

Active Publication Date: 2017-11-21
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical and chemical properties of raw materials such as pore volume and specific surface area limit the loading capacity of active metals
However, there are certain problems with the above non-roasting catalysts. On the one hand, the pore structure of the catalyst is not stable enough, and the active surface area of ​​the carrier is limited. The traditional impregnation method always leads to an uneven distribution of active components; on the other hand, the non-roasting catalyst lacks activity compared with traditional catalysts. The sintering process of component metal microcrystals leads to low mechanical strength; and the poor thermal conductivity of the catalyst also leads to a large temperature rise of the catalyst bed on the hydrogenation unit, which can reach above 10°C

Method used

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  • Roasting-free hydrogenation catalyst and its preparation method and application
  • Roasting-free hydrogenation catalyst and its preparation method and application
  • Roasting-free hydrogenation catalyst and its preparation method and application

Examples

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preparation example Construction

[0058] 1, the preparation method of modified graphene, concrete steps are as follows:

[0059] 101) The mass fraction of 1g natural graphite, 1g anhydrous sodium nitrate and 50ml is 98% concentrated sulfuric acid;

[0060] 102) Slowly put natural graphite and anhydrous sodium nitrate into concentrated sulfuric acid placed in an ice bath, slowly add 6 g of potassium permanganate for oxidation treatment, and stir for 0.5-2 hours to obtain a mixed solution;

[0061] 103) Place the mixed solution in a water bath at a temperature of 35° C., stir for 2 hours, and slowly add 200 ml of deionized water to the mixed solution during the stirring process;

[0062] 104) Then place the mixed solution in an oil bath with a temperature of 98° C., continue to stir and react for 0.5 h, then dilute the mixed solution with deionized water to 400 ml to obtain a diluted solution;

[0063] 105) Slowly add 30ml of hydrogen peroxide with a mass fraction of 30% to the diluted solution, and filter whil...

Embodiment 1

[0076] The preparation method of carrier ①, the specific steps are as follows:

[0077] 1) Weigh 0.5g of β molecular sieve, 5.3g of amorphous silica-alumina, 2.0g of macroporous alumina, 0.2g of modified graphene, and 0.1g of squash powder;

[0078] 2) macroporous alumina, β molecular sieve, amorphous silica-alumina, modified graphene and squat powder were mixed in a kneader for 15 minutes to obtain a mixture;

[0079] 3) Weighing 2g of small-pore alumina and 6g of nitric acid solution with a mass fraction of 4% and mixing them uniformly as a binder;

[0080] 4) Add 8g of adhesive to the obtained mixture, knead for 30min, transfer to extruder for extrusion molding, then freeze-dry it for 20h, and cut into pellets;

[0081] 5) Place the freeze-dried mixture of molded pellets in an air atmosphere, then bake at 500°C for 4 hours, and then cool to room temperature to make a carrier ①;

[0082] The preparation method of selective hydrogenation catalyst ①, concrete steps are as fo...

Embodiment 2

[0086] The preparation method of carrier ②, concrete steps are as follows:

[0087] 1) Weigh 0.5g of beta molecular sieve, 5.0g of amorphous silica-alumina, 2.0g of macroporous alumina, 0.2g of modified graphene, and 0.1g of squid powder;

[0088] 2) macroporous alumina, β molecular sieve, amorphous silica-alumina, modified graphene and squat powder were mixed in a kneader for 15 minutes to obtain a mixture;

[0089] 3) Weighing 2g of small-pore alumina and 6g of nitric acid solution with a mass fraction of 4% and mixing them uniformly as a binder;

[0090] 4) Add 8g of adhesive to the obtained mixture, knead for 30min, transfer to extruder for extrusion molding, then freeze-dry it for 20h, and cut into pellets;

[0091] 5) Place the freeze-dried mixture of molded pellets in an air atmosphere, then bake at 500°C for 4 hours and then cool to room temperature to make a carrier ②;

[0092] The preparation method of selective hydrogenation catalyst ②, concrete steps are as follo...

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Abstract

The invention discloses a roasting-free hydrogenation catalyst and its preparation method and application. The roasting-free hydrogenation catalyst comprises a carrier and a metal active component. The metal active component is carried by a carrier. The roasting-free hydrogenation catalyst comprises 5-30% by weight of the metal active component. The metal active component comprises one or more of Co, Mo, Ni and W salts. The carrier is prepared from 1 to 10 parts by weight of a molecular sieve, 25 to 65 parts by weight of amorphous aluminum silicon, 30 to 65 parts by weight of alumina, 2 to 10 parts by weight of modified graphene and 0.5 to 1 part by weight of sesbania powder. The graphene greatly enhances the mechanical strength of the carrier and the catalyst. Through use of ZrO2 in the modified graphene, the metal distribution and active ammonium phase structure are improved, the active specific surface area of the carrier is improved and sulfur and nitrogen resistance and regeneration performances of the catalyst are improved.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a roasting-free hydrogenation catalyst and its preparation method and application. Background technique [0002] The most notable features of the low-temperature Fischer-Tropsch synthesis reaction are wide product distribution, low product selectivity, low content of isomer products, and most of the products are straight-chain hydrocarbons. The above characteristics lead to very low octane number of Fischer-Tropsch synthetic gasoline fraction, high freezing points of kerosene fraction and diesel fraction, which limit the use of Fischer-Tropsch synthetic oil as fuel oil to a certain extent. [0003] Low-temperature Fischer-Tropsch synthetic oil can produce high-quality diesel oil with no sulfur, no nitrogen, low aromatics and high cetane number through hydrotreating and hydrocracking. Diesel produced from low-temperature Fischer-Tropsch synthesis products has a cetane number of over 70, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/78C10G2/00C10G47/12C10G47/20
CPCC10G2/00C10G47/12C10G47/20B01J29/7815C10G2300/304C10G2400/02B01J35/394B01J35/615B01J35/635
Inventor 王春锋石友良许莉赖波明卫星杨伟光赵焘
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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