Hydrotalcite type hydrocracking catalyst and method for preparing same

A hydrogenation catalyst and hydrocracking technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of low crystallinity, large particle size, poor dispersibility, etc., and achieve high selectivity and high reaction. active effect

Inactive Publication Date: 2008-05-21
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these techniques for preparing HT or HTlc, the co-precipitation method is adopted, which leads to the disadvantages of low crystallinity, large particle size, poor dispersion, etc., and it is difficult to obtain satisfactory activity.

Method used

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  • Hydrotalcite type hydrocracking catalyst and method for preparing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] At room temperature, 50mmol Ni(NO 3 ) 2 ·6H 2 O, 250mmol Mg(NO 3 ) 2 ·6H 2 O, 100mmolAl(NO 3 ) 3 9H 2 O and 2.7 mol of urea were dissolved in a three-necked flask equipped with 250ml of deionized water, and the three-necked flask was immersed in a 105°C oil bath under vigorous stirring. After dynamic crystallization for 10 hours, in order to ensure that the urea was completely decomposed, it Under static aging for 18 hours. After the aging is complete, filter with suction, wash with deionized water for 3 times, dry the obtained sample at 95°C for 20 hours, then roast the dried sample at 500°C and 800°C for 16 and 3 hours respectively, crush and sieve, and take 20-40 range as a catalyst. The molecular formula of the prepared catalyst is Ni 0.5 Mg 2.5 AlO δ .

Embodiment 2

[0021] At room temperature, 50mmol Ni(NO 3 ) 2 ·6H 2 O, 50mmol Co(NO 3 ) 2 ·6H 2 O, 200mmolMg(NO 3 ) 3 ·6H 2 O, 100mmol Al(NO 3 ) 3 9H 2 O and 2.7mol of urea were dissolved in a three-necked flask equipped with 300ml of deionized water, and the three-necked flask was immersed in a 110°C oil bath under vigorous stirring. After dynamic crystallization for 12 hours, in order to ensure that the urea was completely decomposed, the temperature Under static aging for 18 hours. After the aging is complete, filter with suction, wash with deionized water for 3 times, dry the obtained sample at 95°C for 20 hours, then roast the dried sample at 550°C and 800°C for 15 and 4 hours respectively, crush and sieve, and take 20-40 range as a catalyst. The molecular formula of the prepared catalyst is Ni 0.5 co 0.5 Mg 2 AlO δ .

Embodiment 3

[0023] At room temperature, 50mmol Ni(NO 3 ) 2 ·6H 2 O, 50mmol Fe(NO 3 ) 3 9H 2 O, 200mmolMg(NO 3 ) 2 ·6H 2 O, 100mmol Al(NO 3 ) 3 9H 2 O and 3.5 mol of urea were dissolved in a three-necked flask equipped with 300ml of deionized water, and the three-necked flask was immersed in a 105°C oil bath under vigorous stirring. After dynamic crystallization for 15 hours, in order to ensure that the urea was completely decomposed, it Under static aging for 15 hours. After the aging is complete, filter with suction, wash with deionized water three times, dry the obtained sample at 95°C for 15 hours, then roast the dried sample at 600°C and 800°C for 18 hours and 3 hours respectively, crush and sieve, and take 20-40 range as a catalyst. The molecular formula of the prepared catalyst is Ni 0.5 Fe 0.5 Mg2 AlO δ .

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Abstract

The invention relates to a houghite hydrocracking catalyst and a preparation method thereof, and component of the houghite hydrocracking catalyst is Ni / Me-Mg-Al-O, wherein, Me is one or two elements of Co, Fe, Mn, Zn and Cu. The catalyst is used for hydrocracking tar component in coke-oven gas at high temperature to transform the coke-oven gas to rich hydrogenous permanent gas, pertaining to coke-oven gas hydrocracking process and catalyst technology field. The invention has the advantages that: urealysis-homogeneous co-precipitation is adopted, Al, Me, Ni and correspondent divalent metal salt are dissolved in aqueous urea solution, and urealysis speed is controlled by reaction temperature and reaction time; reactive precipitate is filtered, washed and dried, and after roasting for 15 to 20 hours at 500 to 600 DEG C and 3 to 5 hours at 750 to 850 DEG C, and 20 to 40 meshes of particle is obtained after grinding and screening, which is houghite hydrocracking catalyst. The catalyst prepared by the method of the invention has the advantages of high crystallinity, good dispersivity, large specific surface and long service life, etc.

Description

technical field [0001] The invention relates to a hydrotalcite-type hydrocracking catalyst and a preparation method thereof, belonging to the technical field of coke oven gas catalytic cracking technology and catalysts. Background technique [0002] In the context of increasingly severe global energy and environmental issues, hydrogen is considered to be the most ideal and long-term energy carrier for human beings due to its renewability and good environmental protection effects. A large amount of gas produced in the coking process is a high-quality raw material for hydrogen production. The scientific and effective use of coke oven gas not only conforms to the theme of environmental protection and energy saving, but also alleviates energy, resource and environmental problems. The tremendous pressure brought by the development of the metallurgical industry. Dry gasification of tar components in high-temperature coke oven gas is one of the most critical steps in hydrogen prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835C01B3/26
Inventor 程红伟丁伟中鲁雄刚张玉文艾馨鹏
Owner SHANGHAI UNIV
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