Hydrodewaxing catalyst and its preparation method

A hydrogen decondensation and catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc.

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the catalyst has a certain hydrorefining function, it only uses a small amount of the catalyst as a binder and uses alumina as a refining carrier, which has certain limitations.

Method used

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  • Hydrodewaxing catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Catalyst Preparation

[0031] 22.4g dry basis content 67wt% small hole alumina (specific surface area is 290m 2 g -1 , pore volume 0.48mL·g -1 ) and 1.5mol / L, 65mL nitric acid aqueous solution were stirred to prepare peptized binder. 45g dry basis content 67wt% macroporous alumina (specific surface 320m2 g -1 , pore volume 1.10mL·g -1 ) and hydrogen nano ZSM-5 molecular sieve 41.2g (grain size is 50nm, specific surface area is 380m 2 g -1 , Manufacturer: Tianjin Shenneng Technology Co., Ltd., SiO 2 / Al 2 o 3 Mole ratio = 25, 97% by weight on a dry basis) was mixed with the above-mentioned peptized binder. Add 1% of the extruding aid squash powder based on the weight of the dry basis of the catalyst to the above mixture, knead and extrude, then dry at 100°C for 4 hours, and roast at 580°C for 6 hours to obtain the carrier. The carrier is impregnated with an equal volume of 70mL impregnation solution containing 12.0g ammonium metatungstate (tungsten oxide 83w...

Embodiment 2

[0036] 1. Catalyst preparation

[0037] 15g dry basis content 67wt% small hole alumina (specific surface area is 290m 2 g -1 , pore volume 0.48mL·g -1 ) and 1.5mol / L, 65mL nitric acid aqueous solution were stirred to prepare peptized binder. 44.7g dry basis content 67wt% macroporous alumina (specific surface area is 350m 2 g -1 , pore volume 0.87mL·g -1 ) and hydrogen nano ZSM-5 molecular sieve 46.4g (grain size is 70nm, specific surface area is 360m 2 g -1 , Manufacturer: Tianjin Shenneng Technology Co., Ltd., SiO 2 / Al 2 o 3 Mole ratio = 50, 97% by weight on a dry basis) was mixed with the above-mentioned peptized binder. Add 1% extrusion aid carbon black to the above mixture, knead and extrude, then dry at 100°C for 4 hours and calcined at 580°C for 6 hours to obtain the carrier. The above carrier is impregnated with an equal volume of 65mL impregnating solution containing 12.0g ammonium metatungstate (tungsten oxide content 83wt%) and 20.8g nickel nitrate (nicke...

Embodiment 3

[0041] 1. Catalyst preparation

[0042] The specific preparation process is the same as in Example 1, except that the catalyst proportioning ratio is different. Small pore alumina 15.0g; macroporous alumina 44.7g, hydrogen nano ZSM-5 molecular sieve 51.5g (grain size is 80nm, specific surface area is 360m 2 g -1 , Manufacturer: Tianjin Shenneng Technology Co., Ltd., SiO 2 / Al 2 o 3 Molar ratio=80, dry basis 97wt%), ammonium metatungstate (tungsten oxide 83wt%) 8.4g, nickel nitrate (nickel oxide 24wt%) 12.5g, obtain catalyst C, its properties are shown in Table 1.

[0043] 2. Process evaluation

[0044] Process conditions are the same as in Example 1, and the reaction results are shown in Table 2.

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Abstract

The invention discloses a hydrodewaxing catalyst and its preparation method. With the weight of the catalyst as the reference, the catalyst contains the following components of: by weight, 5-10% of tungsten oxide, 1-5% of nickel oxide, 40-50% of nanometer ZSM-5 molecular sieve, 10-40% of macroporous alumina and the balance being a binder. The catalyst is prepared by the following steps of: firstly kneading the nanometer ZSM-5 molecular sieve, macroporous alumina and the binder to prepare a carrier, dipping loaded active metal, and finally carrying out hydrothermal treatment. The hydrodewaxing catalyst provided by the invention has a good shape-selective catalysis function and simultaneously has a good hydrofinishing function, and is especially suitable for the hydrofinishing and pour point reduction processes of a waxy hydrocarbon oil material containing high content of impurities such as sulfur, nitrogen and the like.

Description

technical field [0001] The present invention relates to a hydrodepressing catalyst and a preparation method thereof, in particular to a hydrodepreciating catalyst with a hydrofining function and a preparation method thereof. The catalyst is used in the process of hydrodecondensation or hydrodecondensation of waxy hydrocarbon raw materials, and is especially suitable for the process of hydrodecondensation of raw materials containing high S and N impurities. Background technique [0002] "Hydrodecondensation" means that in the presence of hydrogen, the waxy hydrocarbon feedstock reacts on the surface of the catalyst to reduce the content of wax molecules therein. The principle of dewaxing is that under certain operating conditions, the raw material is mixed with hydrogen and contacted with the hydrogen decondensation catalyst. High freezing point components such as aromatics are selectively cracked into small molecules, while other components are basically unchanged, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48C10G45/12C10G45/08
Inventor 高鹏孟祥兰李永泰于庆新郭晓明
Owner CHINA PETROLEUM & CHEM CORP
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