A preparing method of a rare earth catalytic cracking double-metal deactivator

Abstract

The invention relates to a preparing method of a rare earth catalytic cracking double-metal deactivator. The method includes steps of: A) mixing 300-600 kg of a mother liquor A, 50-150 kg of a mother liquor B and 5-20 kg of a pH conditioner and stirring; and B) adding 30-80 kg of deionized water, stirring for 30-60 min and discharging. The catalytic cracking double-metal deactivator with wide suitability is developed, thus effectively solving a suitability problem of deactivators.

Description

technical field [0001] The invention relates to a preparation method of a rare earth element catalytic cracking double metal passivator. Background technique [0002] Due to the large amount of crude oil imported in my country now, the quality of crude oil is different. The metal deactivators in the traditional technology have the following disadvantages: (1) The main metal elements polluting the catalyst are iron and nickel, and the traditional targeted single metal deactivator cannot satisfy the pollution of the catalyst by various metal elements in crude oil. [0003] (2) The stability of traditional metal passivators is short, and the general storage period is 3 to 6 months. During long-term storage and use, a large amount of precipitation will occur, which will seriously even block the pipeline. [0004] (3) Traditional metal passivators are mostly acidic substances, with a pH of about 2 to 4 (high pH affects product stability). Contact with iron pipes or containers d...

AI Technical Summary

Problems solved by technology

The metal deactivators in the traditional technology have the following disadvantages: (1) The main metal elements polluting the catalyst are iron and nickel, and the traditional targeted single metal deactivator cannot satisfy the pollution of the catalyst by various metal elements in crude oil

[0003] (2) The stability of traditional metal passivators is short, and the general storage period is 3 to 6 months. During long-term storage and use, a large amount of precipitation will occur, which will seriously even block the pipeline

[0004] (3) Traditional metal passivators are mostly acidic substances, with a pH of about 2 to 4 (high pH affects product stability)

Contact with iron pipes or containers during storage and use will accelerate the corrosion of equipment pipes, resulting in reduced product efficacy or failure, and even aggravated catalyst pollution

[0005] (4) Most of the traditional bimetallic passivators are antimony-tin bimetallic passivators, which have high toxicity, poor stability and large dosage

[0006] (5) The traditional process is generally made of two kinds of single metal passivators and compounded by solvents. According to the different pollutant content of crude oil from different manufacturers, the metal content in the two metal passivators needs to be adjusted, and the process is cumbersome

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