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Preparation method and application of catalytic cracking metal passivant

A metal passivator and catalytic cracking technology, which is applied in the direction of catalytic cracking, cracking, treatment equipment corrosion/fouling inhibition, etc., to achieve the effect of increasing the total liquid yield, high thermal decomposition temperature, and increasing the total liquid yield

Active Publication Date: 2010-11-17
金浦新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product can only replace metal deactivators in some catalytic cracking units, and is basically ineffective for heavy metal pollution in catalytic cracking units of MIP-CGP (produce more isoparaffins and increase propylene) process

Method used

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  • Preparation method and application of catalytic cracking metal passivant
  • Preparation method and application of catalytic cracking metal passivant
  • Preparation method and application of catalytic cracking metal passivant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, add 1000kg of diethanolamine into the stainless steel reaction kettle, raise the temperature to 70-90°C within 1 hour, stir, then add 2300kg of hydrogen peroxide and 1000kg of antimony trioxide in sequence, and keep it warm for 1-5 hours. After the oxidation reaction is completed, cool and add Ethylene glycol 500kg, carboxymethyl cellulose (2% aqueous solution) 100kg stir evenly and filter to remove impurities to obtain water-soluble metal deactivator A.

Embodiment 2

[0026] First add 1500kg of triethanolamine into the stainless steel reaction kettle, heat up to 70-90°C within 1 hour, stir, then add 1600kg of hydrogen peroxide, 800kg of antimony trioxide, 100kg of cerium oxide, 100kg of lanthanum oxide, and 300kg of 68% nitric acid to keep warm After 1 to 5 hours, after the oxidation reaction is finished, cool down, add 500 kg of glycerol and 100 kg of carboxymethyl cellulose (2% aqueous solution) and stir evenly, filter to remove impurities and obtain the water-soluble metal deactivator B.

Embodiment 3

[0028] First, add 1000kg of diethanolamine and 900kg of triethanolamine into the stainless steel reaction kettle, raise the temperature to 70-90°C within 1 hour, stir, then add 1500kg of hydrogen peroxide and 1000kg of antimony trioxide in sequence, and keep it warm for 1-5 hours. , cooling, add ethylene glycol 300kg, glycerol 200kg, carboxymethylcellulose (2% aqueous solution) 100kg and stir to get water-soluble metal deactivator C.

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Abstract

The invention relates to a preparation method and application of a catalytic cracking metal passivant. The preparation method comprises the following steps of: preparing raw materials in the following percentage by weight: 20%-45% of dispersing agents, 30%-50% of oxidants, 15%-30% of metal oxides, 10%-30% of solvents and 2%-5% of stabilizing agents; sequentially adding the oxidants and the metal oxides to the dispersing agents during preparation; increasing temperature to 50-90 DEG C within 2-4 hours, keeping the temperature for 1-5 hours and then cooling; adding the solvents and the stabilizing agents, and then filtering to remove impurities so as to obtain the metal passivant, wherein the dispersing agents are diethanol amine and / or triethanol amine; the oxidants are hydrogen peroxide of 30-50 percent and / or nitric acids of 66-68 percent; the metal oxides are one of diantimony trioxide, rare earth oxides and bismuth oxides or mixtures of more than two of the diantimony trioxide, the rare earth oxides and the bismuth oxides in any proportion; the solvents are one of water or alcohol solvents or mixtures of more than two of the water or the alcohol solvents in any proportion; and the stabilizing agents are methylcellulose compound solutions.

Description

technical field [0001] The invention relates to a preparation method and application of a catalytic cracking metal passivator. Background technique [0002] The catalytic cracking unit occupies a dominant position in the refining unit. After heat exchange, the raw material is cracked in contact with the catalyst in the catalytic cracking reactor to obtain dry gas, liquefied gas, gasoline, diesel, coke and oil slurry. Affected by the supply and quality of crude oil, the content of metal elements in crude oil is increasing day by day. What the refining companies are pursuing is high residue ratio, low coke yield and high light oil or total liquid yield in order to achieve the maximum Economic benefits also accelerate the rise of metal elements in the catalytic raw materials on the other hand. The metal elements in the catalytic raw material are very harmful to the catalyst, especially nickel is particularly harmful to the catalyst, which will affect the distribution of cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/00C10G75/00
Inventor 王春柱
Owner 金浦新材料股份有限公司
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