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Carbon-based material, preparation method thereof and purpose thereof

A technology of carbon-based materials and raw materials, applied in the field of oxygen-containing carbon-based materials and their preparation, to achieve the effect of improving conversion rate and selectivity

Active Publication Date: 2016-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing carbon-based materials catalytic oxidative dehydrogenation to olefins has the disadvantage that it is difficult to have high selectivity and conversion at the same time.

Method used

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  • Carbon-based material, preparation method thereof and purpose thereof
  • Carbon-based material, preparation method thereof and purpose thereof
  • Carbon-based material, preparation method thereof and purpose thereof

Examples

Experimental program
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Embodiment approach

[0027] In the method for preparing a carbon-based material provided by the present invention, in the step (1), the raw material of the carbon-based material is contacted with a Grignard reagent in an inert atmosphere to treat the raw material of the carbon-based material. The carbon-based material raw material (also referred to as a solid carbon source in the present invention) contains oxygen, for example, the content of oxygen in the carbon-based material raw material can be 5-40% by weight, such as 5-35% by weight, 5- 30% by weight, preferably 5-25% by weight, more preferably 5-20% by weight. One embodiment, the peroxy group content in the carbon-based material raw material is not less than 0.5×10 －6 mol / g, for example 0.5×10 －6 mol / g~500×10 －6 mol / g, 2.5×10 －6 mol / g~50×10 －6mol / g or 3×10 －6 mol / g~10×10 －6 mol / g, for example, it can be greater than 1×10 －6 mol / g or not less than 2×10 －6 mol / g.

[0028] The carbon-based material raw material (also referred to as a s...

Embodiment 1

[0047] (1) Add 10g of carbon nanotubes to 500mL of mixed acid (V 硫酸 :V 硝酸 =3), then place the beaker in an ultrasonic cleaner, and after ultrasonication for 10 h, wash with deionized water until the filtrate is neutral. Finally, put the filter cake in an oven at 120°C and dry for 12 hours to obtain carbon nanotubes (o-CNTs) with an oxygen content of about 14% by mass.

[0048] (2) According to the ratio of adding 20mL of 1.0M phenylmagnesium chloride ether solution to 1go-CNT, mix o-CNT and phenylmagnesium chloride ether solution, stir at room temperature (for example, 25°C) for 2h, reflux at 1atm boiling point for 12h, and wash with ether for 4 ~5 times, and dried at 80° C. for 2 hours to obtain the carbon-based material provided by the present invention. The carbon-based material has a carbon nanotube structure, and its composition, peroxide group content, and characteristic peak characterization results of 2P electron binding energy of magnesium are shown in Table 1.

Embodiment 2

[0050] It is the same as step (2) of Example 1, except that in step (2), activated carbon with an oxygen content of 9.53% by weight is used to replace the o-CNT. The obtained carbon-based material is an activated carbon structure, and its composition, peroxide group content, and characteristic peak characterization results of 2P electron binding energy of magnesium are shown in Table 1.

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Abstract

The invention provides a carbon-based material, a preparation method thereof and purpose thereof. The carbon-based material includes the elements of C, O, Mg, and Cl, and the content of peroxide in the carbon-based material is less than 2*10<-6>mol / g. The preparation method of the carbon-based material comprises making solid carbon source and Grignard reagent touch with each other for a certain time at non-activated atmosphere, removing the redundant Grignard reagent with a solvent, and drying the product. The carbon-based material can be used for performing oxydehydrogenation of hydrocarbon to prepare alkene. The carbon-based material used for performing oxydehydrogenation to prepare alkene has quite high conversion rate and selectivity.

Description

technical field [0001] The present invention relates to a carbon-based material and its preparation method and use, and more specifically relates to an oxygen-containing carbon-based material and its preparation method and use. Background technique [0002] Carbon-based materials include carbon nanotubes, activated carbon, graphite, graphene, fullerenes, carbon nanofibers, and nanodiamonds, among others. Carbon-based materials can be used as catalytic materials for the oxidative dehydrogenation of hydrocarbons. For example, the document AppliedCatalysis, 29 (1987) 311-326 reports the use of activated carbon as a catalyst to oxidatively dehydrogenate ethylbenzene into styrene. Document ACTAPHYSICAPOLONICA, Vol.118, (2010 ), 459-464 reported the conversion of n-butane to butene and butadiene using activated carbon as a catalyst. [0003] Studies have shown that if the saturated and unsaturated functional groups containing heteroatoms such as oxygen and nitrogen are modified o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C07C11/167C07C5/48
CPCB01J27/22C07C5/48B01J27/138C07C2527/138C07C11/167B01J21/18Y02P20/52B01J21/185B01J37/08C07C2521/18C07C2521/10B01J35/23C07C11/08B01J27/10B01J37/0018B01J35/19B01J35/50C07C11/04B01J37/02B01J6/001B01J21/10B01J37/0236B01J37/04C07C5/324
Inventor 荣峻峰谢婧新李嘉权于鹏史春风
Owner CHINA PETROLEUM & CHEM CORP
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