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Hydrotreating catalyst for bad heavy distillate, and preparation method

A heavy distillate oil and hydrotreating technology, applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of poor pore connectivity, poor mixing uniformity, and small mesoporous ratio, and achieve the effect of good hydrotreating performance.

Active Publication Date: 2007-02-21
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This composite method is characterized by simplicity and ease of use, and is a commonly used industrial preparation method; but there are also shortcomings such as poor mixing uniformity, poor pore connectivity, and small mesopore ratio.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 NiW / Y-TiO 2 -SiO 2 Catalyst preparation

[0024] Weigh 34.0g of tetrabutyl titanate and 20.8g of tetrabutyl titanate and 20.8g of ethyl orthosilicate, dissolve them in ethanol and mix uniformly to obtain solution A; mix 19ml of water, 41.2ml of acetic acid and 40ml of absolute ethanol to obtain solution B. Under strong stirring, drop solution B into A for reaction; add 1.5g Y molecular sieve after 16 minutes of reaction, and then react for 10 minutes to obtain a sol, and the sol is aged for 24h~48h under natural conditions to obtain a gel; The gel is dried with supercritical carbon dioxide fluid. The drying conditions are temperature 40°C, pressure 8.0-12.0MPa, time 1-2 hours, and white powder is obtained; the white powder is roasted in a muffle furnace at 500-600°C for 3 Hours, the composite carrier was obtained. Weigh 1.35g of nickel nitrate and 3.71mL of ammonium metatungstate and dissolve in deionized water to make co-impregnation solution C...

Embodiment 2

[0025] Example 2 NiW / Y-TiO 2 -SiO 2 Catalyst preparation

[0026] Double the addition of Y molecular sieve in Example 1, other preparation and reaction steps and conditions remain unchanged, the specific surface area and pore volume of the catalyst obtained are respectively 281m 2 .g -1 and 0.45mL.g -1 , the desulfurization rate and denitrification rate under the same reaction conditions were 93% and 53%, respectively.

Embodiment 3

[0027] Example 3 NiW / CY-TiO 2 -SiO 2 Catalyst preparation

[0028] Weigh 5.3g of citric acid and dissolve it in 80mL of deionized water, weigh 25g of HY molecular sieve and place it in the reactor, and drop the citric acid solution into the reactor at 35°C for 1.5h to react. The HY molecular sieve filter cake from which the liquid was filtered was put into a beaker and dried at 120° C. for 3 hours. Then the dried HY was calcined in a muffle furnace at 500 °C for 3 h. The resulting pore-enlarging modified molecular sieve is denoted as CY.

[0029] Weigh 34.0g of tetrabutyl titanate and 20.8g of tetrabutyl titanate and 20.8g of tetraethyl orthosilicate, dissolve them in ethanol and mix uniformly to obtain solution A; mix 19ml of water, 41.2ml of acetic acid and 40ml of absolute ethanol to obtain solution B. Under strong stirring, drop solution B into A for reaction; add 3gCY molecular sieve after 16 minutes of reaction, and then react for 10 minutes to obtain a so...

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PUM

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Abstract

This invention relates to a method for preparing hydrogenation catalyst for hydrogenating low-grade heavy fraction gasoline. The hydrogenation catalyst uses microporous molecular sieve / mesoporous composite oxide as the carrier. The carrier is prepared by in-situ growing Ti-Si or Ti-Al mesoporous composite oxide on the surface of the microporous molecular sieve. The pores can be expanded by acid treatment or by adding acidic component P in the composite carrier to obtain hydrogenation catalyst with large specific surface area, high pore volume, gradient pore distribution and controllable acidity, which can satisfy the requirements of desulfurization, denitrification and aromatic hydrocarbon saturation with different degrees. The catalyst has good performance on hydrogenation, desulfurization and denitrification.

Description

Technical field: [0001] The invention provides a class of inferior heavy distillate oil hydrotreating catalyst and a preparation method thereof. A method for preparing catalysts using microporous molecular sieves / mesoporous composite oxides as a carrier is proposed, specifically, on the surface of Y molecular sieves, oxides such as titanium dioxide, silicon dioxide, and alumina are grown in situ and mesoporous composite oxides composed of the two This kind of carrier has gradient pore distribution and acidity distribution. The pore distribution and acidity distribution of this kind of carrier can be adjusted by using acid pore expansion treatment and adding acidic components such as P, so that the prepared catalyst is suitable for petroleum products with different properties. Hydrotreating of heavy fractions, with good hydrodesulfurization and denitrogenation performance. Background technique: [0002] With the intensification of the trend of heavy and inferior crude oil wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/12
Inventor 周亚松马海峰魏强
Owner BC P INC CHINA NAT PETROLEUM CORP
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