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Method for preparing catalytic cracking flue gas sulfur transfer additive with high specific surface area

A catalytic cracking, flue gas sulfur technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of less choice space, unenvironmental manufacturing process, poor desulfurization effect, etc. surface area, reducing the preparation cost and improving the desulfurization effect

Active Publication Date: 2015-01-21
PETROCHINA CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of PVA greatly increases the cost and energy consumption of preparing magnesium aluminum spinel, and it is only suitable for laboratory scale
[0007] At present, the problems existing in the sulfur transfer agent are not only the limited space for the preparation method, but also the small specific surface area of ​​the prepared catalyst and the poor desulfurization effect.
In addition, the current sulfur transfer agent also needs to use relatively expensive rare earth metals or toxic vanadium, which leads to a higher cost of the sulfur transfer agent, and the manufacturing process is not environmentally friendly

Method used

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  • Method for preparing catalytic cracking flue gas sulfur transfer additive with high specific surface area

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The present embodiment provides a sulfur transfer agent, which is prepared according to the following steps:

[0032] Triton X-100, n-amyl alcohol and cyclohexane were prepared into organic phase A1 containing surfactant in a volume ratio of 0:1:1.

[0033] Add 7.5g pseudoboehmite and 30g H to a 0.5L beaker 2 0, stir and dropwise add 1.01g hydrochloric acid (the mass concentration of hydrochloric acid is 36-38%), the dropwise addition time is 5min, after stirring for 30min to obtain a homogeneous mixture, the mixture is placed in a 65 ° C water bath and the pH value Adjust to 3, continue stirring for 5h to make it gelatinous, and make gel B.

[0034] Move the gel B into the organic phase A1 and stir continuously. During the stirring process, add 20 g H 2 O and 59 g Mg (NO 3 ) 2 ·6H 2 O solution, and 25.1 g of 50 wt% Mn (NO 3 ) 2 The solution was added dropwise for 10 minutes, and stirred for 4 hours to obtain a slurry C. The slurry C was filtered and washed to a ...

Embodiment 2

[0036] The present embodiment provides a sulfur transfer agent, which is prepared according to the following steps:

[0037] Triton X-100, n-butanol and n-heptane were prepared into organic phase A2 containing surfactant in a volume ratio of 1:2:1.

[0038] Add 7.5g pseudoboehmite and 30g H to a 0.5L beaker 2 0, stir and dropwise add 1.01g hydrochloric acid (the mass concentration of hydrochloric acid is 36-38%), the dropwise addition time is 5min, after stirring for 30min to obtain a homogeneous mixture, the mixture is placed in a 65 ° C water bath and the pH value Adjust to 3, continue stirring for 5h to make it gelatinous, and make gel B.

[0039] Move the gel B into the organic phase A2 and stir continuously, and add 20 g H during the stirring process. 2 O and 59 g Mg (NO 3 ) 2 ·6H 2 O solution, and 25.1 g of 50 wt% Mn (NO 3 ) 2 The solution was added dropwise for 10 minutes, and stirred for 6 hours to obtain slurry C. The slurry C was filtered and washed to a pH va...

Embodiment 3

[0041] The present embodiment provides a sulfur transfer agent, which is prepared according to the following steps:

[0042] Triton X-100, n-amyl alcohol and cyclohexane were prepared into organic phase A3 containing surfactant in a volume ratio of 2:3:1.

[0043] Add 7.5g pseudoboehmite and 30g H to a 0.5L beaker 2 0, stir and dropwise add 1.01g hydrochloric acid (the mass concentration of hydrochloric acid is 36-38%), the dropwise addition time is 5min, after stirring for 30min to obtain a homogeneous mixture, the mixture is placed in a 65 ° C water bath and the pH value Adjust to 3, continue stirring for 5h to make it gelatinous, and make gel B.

[0044] Move the gel B into the organic phase A3 and stir continuously, and add 20 g H during the stirring process. 2 O and 59 g Mg (NO 3 ) 2 ·6H 2 O solution, and 25.1 g of 50 wt% Mn (NO 3 ) 2 The solution was added dropwise for 10 minutes, and stirred for 6 hours to obtain slurry C. The slurry C was filtered and washed to ...

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Abstract

The invention relates to a method for preparing catalytic cracking flue gas sulfur transfer additive with high specific surface area. The method comprises the following steps of: mixing biparental surfactant, auxiliary surfactant and an oil phase to obtain an organic phase A; mixing pseudo-boehmite with distilled water, adding hydrochloric acid while agitating, putting the mixture into a constant-temperature water bath after forming uniform mixture, and adjusting a pH value to 3-4, agitating the mixture for 1-10 hours to obtain gel B; mixing and agitating the organic phase A with the gel B to obtain size C; and respectively dropping magnesium nitrate solution and manganous nitrate solution of which the concentration is 20-80wt% to the size C in an agitating process, filtering and washing the size C until the pH value is 2-7, and drying, roasting and sieving the solution, thus obtaining the catalytic cracking flue gas sulfur transfer additive. The sulfur transfer additive synthetized by the method does not contain poisonous vanadium species or expensive rare-earth metal, has high specific surface area and can keep high desulfurization rate for a long time.

Description

technical field [0001] The invention relates to a preparation method of a sulfur transfer agent, in particular to a preparation method of a large specific surface area catalytic cracking flue gas sulfur transfer agent, and belongs to the technical field of the preparation of sulfur transfer agents for petroleum catalytic cracking. Background technique [0002] Catalytic cracking (FCC) unit is one of the most serious pollution discharge units in refineries. In recent years, the sulfur content of catalytic cracking feedstocks has continued to increase as refineries process more sour crudes. It has been reported that about 45-55% of the sulfur in the feed is converted to H in the reactor 2 S enters the dry gas, about 35-45% enters the liquid product, and about 5-10% is brought into the regenerator with the coke, and SO is generated when scorched x (where SO 2 about 90%, SO 3 about 10%), becoming the FCC unit SO x origin of. SO x It is discharged into the atmosphere toget...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50B01D53/80B01J23/34
Inventor 张强姜瑞雨李春义杨文慧山红红杨朝合王玉林武俊平马从照
Owner PETROCHINA CO LTD