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Diesel oil hydro-upgrading catalyst and preparation method thereof

A technology for hydrogenation and upgrading and catalyst, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of small increase of diesel cetane number, low yield of diesel products, high density, etc. problems, to achieve the effect of improving cetane number, suitable acidity and acid distribution, and improving pore structure

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned catalysts have high desulfurization and denitrogenation activities, but have the disadvantages of low yield of diesel products, small increase in cetane number of diesel oil, high freezing point and high density.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The modified β molecular sieve of the present invention is synthesized by using tetraethylammonium hydroxide as a template and adopting a hydrothermal crystallization method. Take industrial synthetic β molecular sieve raw powder slurry 10000mL, which contains about 2000g of solid phase β molecular sieve, its chemical silicon aluminum SiO 2 / Al 2 o 3 The (molar ratio) ratio is 27.49, the specific surface area is 101m2 / g, the pore volume is 0.19cm3 / g, and the sodium oxide content is 3.67wt%. Add an appropriate amount of clean water and a certain amount of ammonium nitrate to the slurry, so that the liquid-solid ratio (weight) is 10:1, the concentration of ammonium nitrate is 2mol / L, stir, heat up to 95-100°C, and stir at a constant temperature 2 hours, then filter, the filter cake is subjected to ammonium exchange for the second time, the exchange conditions are the same as the first time, and finally wash the β molecular sieve until the pH value is neutral, put it in ...

Embodiment 2

[0044] Take 200g of B-1 as a raw material, and carry out hydrothermal treatment on B-1 at a water vapor pressure of 0.15MPa, a treatment temperature of 550°C, and a treatment time of 2 hours. The obtained molecular sieve is B-2, and its properties are shown in Table 1.

[0045] Take 200g of B-1 as a raw material, and carry out hydrothermal treatment on B-1, at a water vapor pressure of 0.15MPa, a treatment temperature of 650°C, and a treatment time of 2 hours. The obtained molecular sieve is B-3, and its properties are shown in Table 1.

Embodiment 3

[0047] Weigh 60g of B-2 molecular sieve into a closed flask with a reflux device, add 1000mL of an aqueous solution of aluminum sulfate with a concentration of 0.8mol / L, stir at a constant temperature of 95°C for 1.0 hour, filter, and wash the filter with hot deionized water. Cake, stop washing when the pH value of the washing solution is close to 7. The filter cake was dried in an oven at 120° C. for 5 hours to obtain the β-type molecular sieve of the present invention, its number B-4, and the properties of the molecular sieve are shown in Table 1.

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Abstract

The invention discloses a diesel oil hydro-upgrading catalyst and a preparation method thereof. The catalyst comprises: a carrier composed of a modified beta molecular sieve and alumina, and hydrogenation active metal components. Specifically, the modified beta molecular sieve is prepared by: subjecting a crystallized beta molecular sieve slurry directly to ammonium exchange and a template agent removal treatment, then conducting a hydrothermal treatment first, and performing an aluminum salt solution treatment, under the condition of maintaining a high beta molecular sieve crystallinity, removing part of non-framework aluminum uniformly, thus obtaining the beta molecular sieve with the characteristics of high Si / Al ratio, large specific surface area, appropriate acidity and acid distribution, and reasonable pore structure, etc. The modified beta molecular sieve especially has a suitable cracking effect and a very good isomerization effect on long-chain alkane and the long side chain alkyl of aromatic hydrocarbon and cyclane, so that the catalyst can greatly reduce the condensation point of diesel oil fraction while keeping a high diesel oil yield, improve the cetane number of modified diesel oil, as well as effectively reduce the density and sulfur content of a diesel oil product.

Description

technical field [0001] The invention relates to a diesel oil hydrogenation and upgrading catalyst and a preparation method thereof, in particular to a diesel oil that can be produced by using low-quality diesel oil as a raw material, with high yield of diesel products, high cetane number, large density reduction and low freezing point The characteristic diesel oil hydrogenation upgrading catalyst and its preparation method. Background technique [0002] Due to the performance advantages of diesel engines and their widespread use, the demand for diesel has been strong. In addition, in order to protect the ecological environment on which human beings depend, higher requirements are placed on the quality of diesel products. The "World Fuel Specifications" has put forward more stringent requirements on the sulfur and aromatics content, cetane number, density, T95 and other indicators in diesel oil from the Class II standard. [0003] The diesel currently produced mainly includ...

Claims

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Application Information

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IPC IPC(8): B01J29/78B01J35/10C10G49/08
Inventor 刘昶杜艳泽赵红王凤来关明华
Owner CHINA PETROLEUM & CHEM CORP
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