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Metal catalytic cracking deactivator and its preparation method

A metal deactivator and catalytic cracking technology, which is applied in the direction of catalyst activation/preparation, catalytic cracking, chemical instruments and methods, etc., and can solve the problems of high price and high toxicity

Inactive Publication Date: 2006-04-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of high toxicity and high price of the existing passivating agent technology, provide a non-toxic, simple preparation process, moderate preparation conditions and low price catalytic cracking metal passivating agent, and provide the passivating agent Chemical preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The passivating agent is prepared according to the method provided by the invention.

[0040] 50 grams of deionized water and 16 grams of diethanolamine (commercially available reagents, analytically pure) are added in the bottom flask with a reflux condenser, heated with stirring, and when the temperature reaches about 70 ° C, add 35.2 grams of boric acid (marketed Reagent for sale, analytically pure), and stirred and refluxed at this temperature for 0.5 hours. After the reaction product was completely colorless and transparent, the pH value of the solution was neutral at this time, and the passivator product A was obtained after cooling. The density (20°C) of the product measured by the method described in GB / T2540-81 is 1.16 g / cm 3 ; The kinematic viscosity (40°C) of the product measured by the method described in GB / T265-88 is 9.52 mm 2 / second; the freezing point of the product measured by the method described in GB / T510-83 is less than -10°C; the boron content i...

Embodiment 2

[0042] The passivating agent is prepared according to the method provided by the invention.

[0043] 50 grams of deionized water and 16.5 grams of diethanolamine (commercially available reagent, analytically pure) are added in the flask at the bottom of the garden with a reflux condenser, heated and heated under stirring, when the temperature reaches about 80 ° C, add 29.2 grams of boric acid (marketed Reagent for sale, analytically pure), and stirred and refluxed at this temperature for 0.5 hours. After the reaction product was completely colorless and transparent, 3.66 grams of phosphoric acid was added and stirred for 20 minutes. At this time, the pH value of the solution was neutral, and it was obtained after cooling. Passivator product B. The density (20°C) of the product measured by the method described in GB / T2540-81 is 1.18 g / cm 3 ; The kinematic viscosity (40°C) of the product measured by the method described in GB / T265-88 is 9.82 mm 2 / second; the freezing point o...

example 3

[0045] The passivation effect of the metal passivator provided by the invention is described.

[0046] Get the passivating agent A prepared by example 1, impregnate on the LB-1 cracking equilibrium catalyst (the product produced by Lanzhou Oil Refinery) that nickel content is 6000ppm by a certain ratio, 120 ℃ of oven dry constant weights, then burn at 537 ℃ After 10 hours, catalysts with boron contents of 2000 ppm, 3000 ppm, 4000 ppm and 5000 ppm were obtained. The above-mentioned five catalysts were evaluated in a fixed fluidized bed reactor using the second-line vacuum oil from Shengli Refinery as raw material. The evaluation conditions are: catalyst loading 60g, reaction temperature 490°C, reaction pressure at normal pressure, agent-oil ratio 3.35, weight hourly space velocity 12 hours -1 , and the results are listed in Table 1.

[0047] boron on catalyst

[0048] The results in Table 1 show that the passivator prepared by the method provided by the invention ha...

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PUM

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Abstract

This invention relates to a deactivator which is used for inhibiting the metal pollution of the hydrocarbons catalytic cracking catalyst, in addition to its preparing method, wherein the deactivator is comprises the compound including boron. The deactivator prepared through said method has great deactivating effort on the nickel in the hydrocarbons catalytic cracking catalyst, and the distribution of the product will improve greatly; the productivity of the ideal produce petrol will increase 2,5~4 percent; the productivity of the non ideal product will decreased, wherein the productivity of the hydrogen gas will decrease 20~40%.

Description

technical field [0001] The invention relates to a passivator for suppressing metal pollution of hydrocarbon catalytic cracking catalysts and a preparation method thereof. Background technique [0002] In the catalytic cracking process of hydrocarbons, especially in the catalytic cracking process with heavy oil as raw material, heavy metals such as Fe, Ni, V, Ca, etc. contained in the raw material will be continuously deposited on the surface of the catalytic cracking catalyst, resulting in Deactivation and poor selectivity lead to increased hydrogen and coke yields and lower gasoline and light oil yields. For the metal pollution of catalytic cracking catalysts, in addition to demetallization pretreatment of raw materials and selection of catalysts with strong anti-heavy metal ability in industry, it is also possible to increase the replacement rate of catalysts to improve the properties of catalysts, and to use passivators to inhibit The poisonous effect of the metal in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/00C10G11/02
Inventor 邹滢翁惠新李华军
Owner EAST CHINA UNIV OF SCI & TECH