A kind of selective hydrodesulfurization method

A hydrodesulfurization and selective technology, applied in the field of desulfurization, can solve the problems of increased hydrogen consumption, high cutting temperature, lower octane number of gasoline, etc., and achieve the effects of increased activity, high desulfurization rate, and small loss of octane number

Active Publication Date: 2018-03-02
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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  • A kind of selective hydrodesulfurization method
  • A kind of selective hydrodesulfurization method
  • A kind of selective hydrodesulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1. Preparation of selective hydrodesulfurization catalyst

[0067] 1. Preparation of carrier

[0068] According to γ-Al 2 o 3 : KNO 3 : The mass ratio of water is 6:0.3:9, the γ-Al2 o 3 with KNO 3 The solution was impregnated with an equal volume, dried at 120°C for 4h after impregnated, and then calcined at 550°C for 4h to obtain a metal oxide treated with a metal salt (that is, treated with KNO 3 γ-Al treated by solution impregnation 2 o 3 ); grinding the above prepared metal oxide treated with metal salt to obtain a carrier.

[0069] 2. Atomic layer deposition

[0070] 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, ...

Embodiment 2

[0092] 1. Preparation of selective hydrodesulfurization catalyst

[0093] 1. Preparation of carrier

[0094] According to γ-Al 2 o 3 : KNO 3 : The mass ratio of water is 6:0.6:9, the γ-Al 2 o 3 with KNO 3 The solution is impregnated with equal volume, dried at 120°C for 4h after impregnated, and then roasted at 550°C for 4h to obtain the metal oxide treated with metal salt (that is, γ-Al impregnated with KNO3 solution 2 o 3 ); grinding the above prepared metal oxide treated with metal salt to obtain a carrier.

[0095] 2. Atomic layer deposition

[0096] 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 ...

Embodiment 3

[0116] 1. Preparation of selective hydrodesulfurization catalyst

[0117] 1. Metal salt treatment of metal oxides

[0118] 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 ).

[0119] 2. Alkali treatment of molecular sieves

[0120] 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...

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Abstract

The invention provides a selective hydrodesulfurization process which comprises the following steps: cutting a gasoline feedstock into light ends and heavy ends; performing liquid-liquid extraction for the light ends to obtain light end raffinate containing olefins and light end extraction oil containing sulfide and aromatics; and using selective hydrodesulfurization catalysts to perform selective hydrodesulfurization for the light end extraction oil and the heavy ends, wherein the main component of the selective hydrodesulfurization catalyst is obtained by loading an active metal component with a metal oxide, treated with a metal salt, as the carrier, wherein the active metal is selected from more than two elements in IA, VIII, VIB and VIIB groups in the periodic table. The selective hydrodesulfurization process provided by the invention has the advantages of high desulfurization rate and small loss of the octane value of sweet gasoline.

Description

technical field [0001] The invention relates to a desulfurization method, in particular to a selective hydrogenation 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 octane loss, the specific surface ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/04
CPCC10G67/04C10G2300/202C10G2400/02
Inventor 赵亮高金森董立霞王郁现徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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