Method for preparing pillared magnesium-saponite catalytic cracking flue gas sulfur transfer additive

A catalytic cracking and stesterite technology, applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve the problems of toxic catalytic cracking catalyst molecular sieves, sulfur transfer agents that violate environmental protection, and affect the distribution of catalytic cracking products. Good desulfurization activity, easy control of product properties, beneficial to adsorption and reaction effects

Active Publication Date: 2014-07-23
PETROCHINA CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spinel materials just meet the physical and chemical requirements of catalytic cracking units for sulfur transfer agents, but the desulfurization rate of spinel-based sulfur transfer agents is not high. For this defect, magnesium modified with vanadium and cerium is usually used Scheme of aluminum spinel type sulfur transfer agent
The formulation of this vanadium-containing spinel-type sulfur transfer agent is in a stable stage for a long time, but in order to obtain the desired oxidation ability, the required V 2 o 5 The amount of sulfur transfer agent is too high (5-10wt%), and this will poison the molecular sieve in catalytic cracking catalyst, influence the distribution of catalytic cracking product, make the research of sulfur transfer agent violate the original intention of environmental protection use

Method used

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  • Method for preparing pillared magnesium-saponite catalytic cracking flue gas sulfur transfer additive
  • Method for preparing pillared magnesium-saponite catalytic cracking flue gas sulfur transfer additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The present embodiment provides a kind of sulfur transfer agent, it is prepared through the following steps:

[0032] Magnesia saponite preparation: 10g AlCl 3 ·6H 2 O was dissolved in 90g water to make solution A; 60g MgCl 2 ·6H 2 O was mixed with 80g water to form solution B; solution A and solution B were mixed and stirred for 2h, 50g of silica sol (silicon content: 40%) was added, stirred for 2h, and the pH value was adjusted to 14 by using NaOH solution with a concentration of 0.395mol / L. , and then stirred for 4 hours to obtain a gel, which was crystallized at 80° C. for 4 hours and 220° C. for 48 hours to obtain stesterite.

[0033] Preparation of crosslinking agent solution: 4.88g MgCl 2 ·6H 2 O, 3.8g AlCl3 ·6H 2 O with 0.48g Fe(NO 3 ) 3 9H 2 O was added to 200mL of deionized water, and then a NaOH solution with a concentration of 0.3M was added. After stirring at room temperature for 2 hours, it was aged at 60°C for 10 hours to obtain a cross-linking a...

Embodiment 2

[0037] The present embodiment provides a kind of sulfur transfer agent, it is prepared through the following steps:

[0038] Magnesia saponite preparation: 25gAl(NO 3 ) 3 9H 2 O was dissolved in 90g water to make solution A; 60g MgCl 2 ·6H 2 O was mixed with 80g water to form solution B; solution A and solution B were mixed and stirred for 2h, 50g of silica sol (silicon content: 40%) was added, stirred for 2h, and the pH value was adjusted to 13 by using NaOH solution with a concentration of 0.375mol / L. , and then stirred for 4 hours to obtain a gel, which was crystallized at 60° C. for 4 hours and 200° C. for 72 hours to obtain stesterite.

[0039] Preparation of crosslinking agent solution: 4.88gMgCl 2 ·6H 2 O, 4.5gAl(NO 3 ) 3 9H 2 O with 0.48g Fe(NO 3 ) 3 9H 2 O was added to 200mL of deionized water, and then a NaOH solution with a concentration of 0.3M was added. After stirring at room temperature for 2 hours, it was aged at 60°C for 10 hours to obtain a cross-...

Embodiment 3

[0043] The present embodiment provides a kind of sulfur transfer agent, it is prepared through the following steps:

[0044] Magnesia saponite preparation: 25gAl(NO 3 ) 3 9H 2 O was dissolved in 90g of water to form solution A; 91g of Mg(ClO 4 ) 2 Mix with 80g of water to form solution B; mix solution A and solution B for 2h, add 50g of silica sol (silicon content: 40%), stir for 2h, and adjust the pH value to 12 by using a NaOH solution with a concentration of 0.50mol / L. Then stirring for 4 hours to obtain a gel, which was crystallized at 60° C. for 4 hours and 200° C. for 72 hours to obtain stesterite.

[0045] The preparation of cross-linking agent solution: 10.74g Mg(ClO 4 ) 2 , 4.5gAl(NO 3 ) 3 9H 2 O with 0.48g Fe(NO 3 ) 3 9H 2 O was added to 200mL of deionized water, and then a NaOH solution with a concentration of 0.3M was added. After stirring at room temperature for 2 hours, it was aged at 60°C for 10 hours to obtain a cross-linking agent solution. The n(O...

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Abstract

The invention relates to a preparation method of a pillared stesterite type catalytic cracking flue gas sulfur transfer agent. The method comprises the following steps: mixing magnesium saponite with water to obtain a magnesium saponite dispersion; mixing iron source, magnesium source, aluminum source and / or cerium source with water or oxalic acid, and adding NaOH solution to prepare a crosslinking agent solution ;Mix the magnesium saponite dispersion and the crosslinking agent solution, keep it at 10-80°C for 5-30h, and then keep it at 90-130°C for 1-40h to obtain crosslinked magnesium saponite; impregnate cerium nitrate on the crosslinked magnesium saponite , roasted to obtain the pillared magnesium saponite type catalytic cracking flue gas sulfur transfer agent. The pillared stesterite-type catalytic cracking flue gas sulfur transfer agent prepared by the method provided by the invention has good desulfurization activity.

Description

technical field [0001] The invention relates to a preparation method of a catalytic cracking flue gas sulfur transfer agent, in particular to a preparation method of a pillared stesterite-type catalytic cracking flue gas sulfur transfer agent, and belongs to the technical field of preparation of catalysts for petroleum catalytic cracking. Background technique [0002] SO 2 It is one of the air pollutants, which will form acid rain, destroy the human living environment and endanger human health. In recent years, due to the continuous increase of the sulfur content of the raw material of the catalytic cracking unit, the SO in the regeneration flue gas of the catalytic cracking unit 2 concentration has increased substantially. The national standard requires that the SO 2 The concentration is controlled at 550mg / m 3 Below, the latest standard requires control at 400mg / m 3 Below, it is required to be controlled at 200mg / m for areas with high density of land development 3 th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/02B01D53/81B01D53/50B01J20/10B01J20/30
Inventor 张强孟晓静杨文慧李春义山红红杨朝合徐少军季德伟张兆涛
Owner PETROCHINA CO LTD
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