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Selective hydrodesulfurization catalyst and desulfurization method

A hydrodesulfurization and selective technology, applied in chemical instruments and methods, molecular sieve catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve high investment and operating costs, lower gasoline octane number, cutting High temperature and other problems, to achieve the effect of small loss of octane number, high activity and high desulfurization rate

Inactive Publication Date: 2017-01-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The cutting temperature of gasoline raw materials in the above method is relatively high, and the sulfur content in the light fraction formed by cutting is relatively large. It is difficult to reduce the sulfur content of the light fraction to below 10ppm by relying on non-hydrogenation desulfurization methods such as sweetening. When the gasoline product is 10ppm, most of the light fractions still need to be hydrodesulfurized, which not only requires high investment and operating costs, but also saturates a large amount of olefins while removing sulfur compounds, which not only increases hydrogen consumption, but also reduces the octane number of gasoline. significantly reduce

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] 1. Preparation of carrier

[0091] According to γ-Al 2 o 3 : KNO3: water with a mass ratio of 6:0.3:9, the γ-Al 2 o 3 impregnated with equal volume of KNO3 solution, dried at 120°C for 4h after impregnation, and then roasted at 550°C for 4h to obtain the metal oxide treated with metal salt (i.e. γ-Al impregnated with KNO3 solution 2 o 3 ); grinding the above prepared metal oxide treated with metal salt to obtain a carrier.

[0092] 2. Atomic layer deposition

[0093] Nitrogen was used as the carrier gas and purge gas, and 10.3 parts by mass of CoSO were introduced into the reactor equipped with 100 parts by mass of the above carrier in a pulsed manner. 4 Steam and 21.3 mass parts (NH 4 ) 6 Mo 7 o 24 steam, followed by N 2 purge, steam purge and N 2 Purge, where the deposition temperature is controlled at 250°C and the gas flow rate is 250cm 3 / min, that is, complete one deposition; repeat the above operation 200 times, that is, complete 200 depositions.

...

Embodiment 2

[0099] 1. Preparation of carrier

[0100] According to γ-Al 2 o 3 : KNO3: water with a mass ratio of 6:0.6:9, the γ-Al 2 o 3 impregnated with equal volume of KNO3 solution, dried at 120°C for 4h after impregnation, and then roasted at 550°C for 4h to obtain the metal oxide treated with metal salt (i.e. γ-Al impregnated with KNO3 solution 2 o 3 ); grinding the above prepared metal oxide treated with metal salt to obtain a carrier.

[0101] 2. Atomic layer deposition

[0102] With nitrogen as the carrier gas and purge gas, 10.3 parts by mass of CoSO were introduced into the reactor equipped with 100 parts by mass of the carrier prepared in Example 1 in a pulsed manner. 4 Steam and 21.3 mass parts (NH 4 ) 6 Mo 7 o 24 steam, followed by N 2 purge, steam purge and N 2 Purge, where the deposition temperature is controlled at 200°C and the gas flow rate is 250cm 3 / min; repeat the above operation 200 times.

[0103] 3. Preparation of selective hydrodesulfurization catal...

Embodiment 3

[0107] 1. Metal salt treatment of metal oxides

[0108] According to γ-Al 2 o 3 : KNO3: water with a mass ratio of 6:0.3:9, the γ-Al 2 o 3 impregnated with equal volume of KNO3 solution, dried at 120°C for 4h after impregnation, and then roasted at 550°C for 4h to obtain the metal oxide treated with metal salt (i.e. γ-Al impregnated with KNO3 solution 2 o 3 ).

[0109] 2. Alkali treatment of molecular sieves

[0110] 500mL of Na with a concentration of 4mol / L 2 CO 3 After the temperature of the solution water bath was raised to about 70°C, 25g of ZSM-5 molecular sieve was added to it, and after stirring for about 200 minutes, the mixture was immediately lowered to room temperature in an ice bath, filtered and washed with deionized water for several times until the filter cake was filtered. After the pH value of the effluent is about 7, the obtained filter cake is dried in an oven at 110° C. for 4 hours to obtain an alkali-treated ZSM-5 molecular sieve.

[0111] 3. Pre...

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Abstract

The invention provides a selective hydrodesulfurization catalyst and a desulfurization method. The main ingredient of the selective hydrodesulfurization catalyst is obtained in the manner that metal-salt-treated metallic oxide serves as a carrier and is loaded with an reactive metal ingredient, wherein the reactive metal is selected from two or more elements in the groups IA, VIII, VIB and VIIB in the periodic table. Besides, according to the selective hydrodesulfurization method, extractive distillation is carried out on a gasoline raw material, and selective hydrodesulfurization is carried out with the selective hydrodesulfurization catalyst. The desulfurization method is low in energy consumption and high in desulfurization rate; besides, the octane value loss of desulfurized gasoline is small.

Description

technical field [0001] The invention relates to a desulfurization catalyst, in particular to a selective hydrogenation desulfurization catalyst and a desulfurization method. Background technique [0002] In my country's commercial gasoline, more than 70% comes from catalytic cracking gasoline (FCC gasoline), which not only contains a large amount of sulfur, but also brings more olefins to maintain a high octane number. On January 1, 2017, my country is about to implement the National V gasoline quality standard, which stipulates that the sulfur content shall not exceed 10ppm. Therefore, under the current situation of my country's unique gasoline composition and mature production technology, the research has high desulfurization and high selectivity effects The catalyst becomes the key. [0003] At present, desulfurization technology is mainly divided into hydrodesulfurization and non-hydrogenation desulfurization. Although the non-hydrodesulfurization technology has low oct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48C10G45/12C10G45/08B01J23/887
CPCC10G45/08C10G45/12B01J23/002B01J23/8871B01J29/48B01J2229/38B01J2229/20B01J2523/00C10G2300/70B01J35/393B01J35/615B01J2523/12B01J2523/31B01J2523/68B01J2523/845B01J2523/22
Inventor 高金森赵亮董立霞王郁现徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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