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Method for reducing aromatic hydrocarbon by indirect hydrogen transfer

An aromatic hydrocarbon and hydrogen transfer technology, applied in the fields of hydrogenation to hydrocarbons, organic chemistry, etc., can solve the problems of slow reaction speed, poor solubility, and long reaction time, and achieve the effect of improving the hydrogenation reaction rate and mild hydrogenation reaction conditions.

Inactive Publication Date: 2013-11-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aromatic ring hydrogenation methods reported above can all obtain higher conversion rates, but there are also common defects: due to the poor solubility of hydrogen in aromatic hydrocarbons, the hydrogenation conditions are relatively harsh (higher pressure or temperature, Or the reaction time is longer), the reaction speed is slower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: the reduction of benzene

[0019] Add 3.9g (0.05mol) of benzene, 2.5g (0.013mol) of N-ethylcarbazole and 0.2g of Ru into the autoclave, fill with hydrogen to a pressure of 0.4MPa, raise the temperature to 50°C, and stir for 3 hours to complete the reaction. After the temperature was lowered and the kettle was opened, 4.1 g of the product cyclohexane was obtained with a yield of 98% through distillation.

Embodiment 2

[0021] Embodiment 2: the reduction of toluene

[0022] Add 4.6g (0.05mol) of toluene (0.05mol), 2g (0.012mol) of carbazole and 0.2g of Ru into the autoclave, fill with hydrogen to a pressure of 0.2MPa, and the reaction temperature is 75°C, and the reaction is completed after stirring for 5 hours. Product methylcyclohexane 2.5g, yield is 51%.

Embodiment 3

[0024] Embodiment 3: the reduction of toluene

[0025] Add 4.6g (0.05mol) of toluene (0.05mol), 2g (0.012mol) of carbazole and 0.2g of Rh into the autoclave, fill with hydrogen to a pressure of 1MPa, the reaction temperature is 60°C, and the reaction is completed after stirring for 2 hours. After cooling down and opening the kettle, the product is distilled 4.7 g of methylcyclohexane, the yield is 96%.

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PUM

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Abstract

The invention discloses a method for reducing aromatic hydrocarbon by indirect hydrogen transfer. The aromatic hydrocarbon is reduced into hydrocarbon alkyl in the presence of catalyst, hydrogen transfer medium and hydrogen; and the reduction reaction conditions are as follows: dose ratio of the catalyst to the aromatic hydrocarbon is 0.11-1g / 0.05mol; dose ratio of the hydrogen transfer medium to the aromatic hydrocarbon is 0.005-0.05mol / 0.05mol; hydrogen is filled to 0.2-0.4MPa; reaction temperature is 50-180 degrees centigrade; and the reaction time is 1-7h. The method for reducing aromatic hydrocarbon disclosed by the invention is convenient to operate and high-efficiency.

Description

technical field [0001] The invention relates to a method for indirect hydrogen transfer reduction of aromatic hydrocarbons. Background technique [0002] Aromatics are the main components of catalytic cracking (FCC) oil slurry. my country's catalytic cracking units produce a large amount of oil slurry every year. At present, there are many ways to use FCC oil slurry. Hydrogenation reduces it to saturated Reuse of hydrocarbons for catalytic cracking is a more efficient way of utilization. At present, the reduction of aromatics is mainly based on hydrogenation. It has been reported that Ru-NP / CDG was used as catalyst to catalyze the hydrogenation of benzene (Carbon 49(4): 1326-1322). (CN101602644). The hydrogenation reduction of aromatics containing multiple benzene rings is relatively difficult, and there are few reports. It has been reported that Rh was used as a catalyst to catalyze the hydrogenation of anthracene (Journal of Physical Chemistry C, 113(46), 19782-19788). T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/10C07C13/18C07C13/50C07C13/58C07C13/28
Inventor 陈新志周少东钱超
Owner ZHEJIANG UNIV
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