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High-selectivity acetonitrile preparation method

A technology selected from acetonitrile, applied in the field of organic matter preparation, to achieve the effect of low cost

Active Publication Date: 2016-11-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Acetonitrile is a relatively stable nitrile compound, which is not easy to undergo oxidation or reduction reactions, but is prone to addition reactions between carbon and nitrogen triple bonds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this example, a quartz tubular reactor with a diameter of 10 mm and a length of 250 mm was used. In the reactor, the catalyst was supported by quartz wool. Install the quartz reactor in a temperature-controlled furnace. Reactor temperature was monitored by thermocouples inserted into the surface of the temperature-controlled furnace packed bed. During operation, use NH 3 , NH 3 / N 2 or NH 3 / He mixed gas is used as the carrier gas, and its flow rate is controlled by a gas flow meter. The powdery raw materials flow together with the carrier gas flow from the opening of the quartz tube to the pyrolysis interface. The reaction temperature is 200-900°C, and the carrier gas flow rate is 5-200mL / min. Liquid products flow from the reactor to the condenser and gaseous products are collected in gas sampling bags. Liquid and gaseous products were analyzed using a gas chromatograph.

[0038] As representative of several embodiments, the catalytic pyrolysis tests descri...

Embodiment 2

[0041] In this example, the preparation of acetonitrile by catalytic pyrolysis of different raw materials such as chlorella, spirulina, lysine, aspartic acid, duckweed, rapeseed cake, and activated sludge was tested.

[0042]

[0043]

[0044] Reaction conditions: the reaction temperature is 800° C.; the catalyst is ZSM-5; the flow rate of ammonia gas is 40 mL / min. Example 3:

Embodiment 3

[0045] In this embodiment, the influence of different reaction temperatures on the yield and selectivity of acetonitrile was tested.

[0046]

[0047] Reaction conditions: the raw material is chlorella; the catalyst is ZSM-5; the flow rate of ammonia gas=40mL / min.

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Abstract

The invention relates to a high-selectivity acetonitrile preparation method. The method comprises the steps that in a reactor, under the condition that gas containing a reactive nitrogen compound is used as carrier gas, organic materials are reacted under catalysis of a catalyst in a heated mode; liquid is condensed and collected, and acetonitrile is obtained through separation. According to the method, renewable resources are utilized, and acetonitrile is prepared in a high-selectivity mode through an appropriate reaction method. The whole process from raw materials to the production process is renewable, green and environmentally friendly.

Description

technical field [0001] The invention relates to the field of organic matter preparation, in particular to a method for preparing acetonitrile with high selectivity. Background technique [0002] Biomass resources are the only sustainable source of organic carbon and the only renewable resource that can be converted into liquid fuels and chemicals. Compared with traditional fossil energy, biomass resources have the characteristics of wide distribution, large amount, pollution-free and renewable. In addition to the three major elements of carbon, hydrogen, and oxygen, biomass also contains other elements such as nitrogen. The nitrogen content of biomass is related to the type of biomass and plant parts. Most nitrogen in biomass exists in the form of protein, and a small amount of nitrogen is also contained in chlorophyll, nucleic acid, glucose amide, and cell wall. Generally speaking, the nitrogen content of softwood and hardwood (excluding leaves) is extremely low, only 0....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C253/00C07C255/03
CPCC07C253/00C07C255/03
Inventor 张颖姚倩徐禄江
Owner UNIV OF SCI & TECH OF CHINA
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