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Antimony metal passivator and bimetal passivator

A technology of metal passivating agent and passivating agent, which is applied in catalytic cracking, catalyst protection, chemical instruments and methods, etc., can solve the problem of low production safety of antimony-based passivating agents, turbid appearance of antimony-based passivating agents, and production costs Advanced problems, to achieve the effect of improving stability and transparency, improving process safety, and low cost

Inactive Publication Date: 2019-09-20
SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the passivating agents commonly used in the market are mainly antimony-based passivators, but the antimony-based passivators currently available in the market are relatively cloudy in appearance and poor in stability, and white precipitates will appear after a period of time
Moreover, these antimony-based passivators also have problems such as low production safety and high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Antimony-based passivator: Add 27 parts by mass of water into the four-necked flask, turn on the stirring device, control the speed at 240-250r / min, continue to add 10 parts by mass of citric acid and 8 parts by mass of ethanolamine, stir for 30min, and detect When the pH value is between 4 and 6, add 30 parts by mass of antimony trioxide, continue to stir for 30 minutes, weigh 25 parts by mass of hydrogen peroxide with a concentration of 27 wt%, and start adding dropwise at room temperature. The dropping rate is controlled at 1-3 g / min. When the reaction temperature rose to 75°C, the drop rate began to decrease. Observe the temperature of the reaction system, control the dropping rate at 0-3 g / min, and adjust the reaction temperature. After the dropwise addition, put it into a water bath heated to 85-90° C. in advance, and continue to stir for 2 hours to obtain a light yellow-green translucent product with an antimony content of 25 wt%.

[0048] Lanthanide passivator:...

Embodiment 2

[0057] Antimony-based passivator: Add 27 parts by mass of water into the reaction kettle, turn on the stirring device, control the speed at 200r / min, continue to add 10 parts by mass of citric acid and 8 parts by mass of ethanolamine, stir for 30min, and check the pH value at 4-6, add 30 parts by mass of antimony trioxide, continue to stir for 30 minutes, weigh 25 parts by mass of hydrogen peroxide with a concentration of 27wt%, and start adding dropwise at room temperature. When it reached 75°C, the dropping rate began to decrease. Observe the temperature of the reaction system, control the dropping rate at 0-4kg / min, and adjust the reaction temperature. After the dropwise addition, put the industrial water heated to 95°C in advance into the jacket of the reaction kettle to circulate, heat the inside of the reaction kettle to 85-90°C, and continue to stir for 2 hours to obtain a light yellow-green translucent product with an antimony content of 25wt%. .

[0058] Lanthanide ...

Embodiment 3

[0067] Antimony-based passivator: Add 40.5 parts by mass of water into the four-necked flask, turn on the stirring device, control the speed at 240-250r / min, continue to add 8 parts by mass of citric acid and 6.5 parts by mass of ethanolamine, stir for 30min, and detect When the pH value is between 4 and 6, add 24 parts by mass of antimony trioxide, continue to stir for 30 minutes, weigh 21 parts by mass of hydrogen peroxide with a concentration of 27 wt%, and start adding dropwise at room temperature. The dropping rate is controlled at 1-3 g / min. When the reaction temperature rose to 75°C, the drop rate began to decrease. Observe the temperature of the reaction system, control the dropping rate at 0-3 g / min, and adjust the reaction temperature. After the dropwise addition, put it into a water bath heated to 85-90°C in advance, and continue stirring for 2 hours to obtain a light yellow-green translucent product with an antimony content of 20 wt%.

[0068] Lanthanide passivato...

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PUM

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Abstract

The invention belongs to the field of petrochemical industry and particularly relates to an antimony metal passivator and a bimetal passivator. The antimony metal passivator provided by the invention is prepared according to the following steps: a) mixing citric acid and ethanolamine in water, so as to obtain a mixed solution with a pH value of 4 to 6; and b) subjecting the mixed solution, antimony trioxide and hydrogen peroxide to a hybrid reaction, thereby obtaining the antimony metal passivator. According to the antimony metal passivator, water serves as a dispersion system, citric acid and ethanolamine are adopted as double dispersants, and thus, the stability and transparency of the passivator are improved; and meanwhile, through adjusting a pH value of a reaction system by using the dispersants, the decomposition of hydrogen peroxide of a reaction process is inhibited, and the safety of process is improved. The antimony metal passivator provided by the invention is of homogeneous liquid under normal-temperature conditions and can be dissolved with water at a random ratio, and products are high in stability and easy in storage and use. The preparation of the passivator does not need harsh production conditions such as high temperatures and high pressure, the production process is simple, the cost is relatively low, and no waste gases, waste water and waste residues is produced.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to an antimony series metal passivator and a double metal passivator. Background technique [0002] At present, domestic and foreign companies are processing more and more crude oil with high metal content. The metals in crude oil mainly include nickel and vanadium, among which nickel can catalyze the dehydrogenation reaction of hydrocarbons, increase the carbon area on the surface of the catalyst, and cause carbon deposition pollution; vanadium can not only promote the formation of coke, but also destroy the crystal lattice of the molecular sieve of the catalyst The structure deactivates the catalyst, resulting in poor selectivity of the target product, a decrease in conversion rate, and an increase in dry gas and coke yields. Therefore, a metal passivator was developed to improve the device problem. [0003] At present, the nickel passivation agents commonly use...

Claims

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Application Information

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IPC IPC(8): B01J33/00C10G11/00
CPCB01J33/00C10G11/00C10G2300/705
Inventor 尹博杨云龙董双建王昌朋郭文娟
Owner SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
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