Method for preparing acetonitrile from lignocellulosic biomass material

A technology of biomass material and wood fiber, which is applied in the field of organic matter preparation to achieve the effect of low cost

Active Publication Date: 2018-05-29
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A previous patent application CN106117082A of the applicant proposed a method for preparing acetonitrile with high selectivity, but the raw materials used in the method were biomass materials containing nitrogen itself, such as amino acids, proteins, algae, cakes , activated sludge, etc., and does not involve the synthesis of acetonitrile from lignocellulosic biomass materials

Method used

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  • Method for preparing acetonitrile from lignocellulosic biomass material
  • Method for preparing acetonitrile from lignocellulosic biomass material
  • Method for preparing acetonitrile from lignocellulosic biomass material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: utilize different raw materials to prepare acetonitrile

[0048] In this example, acetonitrile was prepared by catalytic pyrolysis from cellulose, xylan, lignin, corncob, bagasse, rice husk, birch sawdust, sucrose, sorbitol and fructooligosaccharides as raw materials.

[0049] The reaction conditions are as follows: the reaction temperature is 600°C; the catalyst is HZSM-5 molecular sieve; ammonia gas is used as the carrier gas, and the carrier gas flow rate is 80mL / min; the mass ratio of raw material to catalyst is 1:1, and the results are shown in Table 1 below , and the GC spectrogram of the product acetonitrile obtained with cellulose as raw material is shown in the attached figure 1 .

[0050]

[0051] It can be seen from the results in Table 1 that various lignocellulosic biomass materials can produce acetonitrile with high selectivity, the selectivity of acetonitrile in liquid products can be as high as 88.5%, and the yield of acetonitrile can b...

Embodiment 2

[0052] Embodiment 2: utilize different temperature to prepare acetonitrile

[0053] In this embodiment, the influence of different reaction temperatures on the yield and selectivity of acetonitrile was tested.

[0054] The reaction conditions are as follows: the raw material is corncob powder; the catalyst is HZSM-5; ammonia is used as the carrier gas, and the carrier gas flow rate is 80mL / min; the mass ratio of raw material to catalyst is 1:1, and the results are shown in Table 2 below.

[0055]

[0056] It can be seen from the results in Table 2 that when the temperature is too low, for example, at 100° C., the desired product acetonitrile cannot be detected, that is, almost no reaction occurs. In the temperature range from 200°C to 1000°C, as the temperature increased from 200°C to 600°C, the yield of acetonitrile increased from 19.8% to 36.7%, and the selectivity of acetonitrile in liquid products increased from 72.4% to 86.2% while the temperature increased from 600°C...

Embodiment 3

[0057] Embodiment 3: utilize different catalysts to prepare acetonitrile

[0058] In this example, different catalysts were tested for catalytic pyrolysis of corncobs, and the catalysts used were HZSM-5, HY, BETA, MCM-41, SAPO-34, Al 2 o 3 、TiO 2 、MoO 3 / ZrO 2 , SO 4 2- / Fe 2 o 3 , sulfuric acid, nitric acid and hydrochloric acid.

[0059]The reaction conditions are as follows: the raw material is corncob; the reaction temperature is 600°C; ammonia is used as the carrier gas, and the carrier gas flow rate is 80mL / min; the mass ratio of raw material to catalyst is 1:1, and the results are shown in Table 3 below.

[0060]

[0061] As can be seen from the results in Table 3, all kinds of acidic catalysts have a good catalytic effect on the preparation of acetonitrile from corncobs, the yield of acetonitrile is above 30%, and the selectivity of acetonitrile in liquid products is above 73%.

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Abstract

The invention relates to a method for preparing acetonitrile from a lignocellulosic biomass material. The method comprises feeding a lignocellulosic biomass material into a reactor, heating the material for a reaction in the presence of a reactive nitrogen compound and an acidic catalyst, and carrying out condensation and separation to obtain a product acetonitrile. Through the method, acetonitrile is high selectively prepared from the lignocellulosic biomass material. The method is simple and easy, utilizes cheap and easily available raw materials in a wide resource and provides a reproducible and eco-friendly synthesis route from raw material acquisition to product production. The product acetonitrile can be widely used in the fields of medicines, pesticides, spices, fabric dyeing and photosensitive materials.

Description

technical field [0001] The invention relates to the field of organic matter preparation, in particular to a new method for preparing acetonitrile from lignocellulosic biomass materials. Background technique [0002] With the decreasing fossil resources and people's increasing concern about environmental issues, biomass resources, as the only renewable bulk carbon source, are considered to be an important alternative source for large-scale production of renewable fuels and chemicals. Lignocellulosic biomass material is the most important part of biomass resources. It is composed of three major parts: cellulose, hemicellulose, and lignin, and mainly contains three elements: carbon, hydrogen, and oxygen. Lignocellulosic biomass materials can be divided into primary biomass, waste biomass and energy crops. Protist biomass includes all native terrestrial plants in nature, including trees, shrubs and weeds. Waste biomass is a low-value by-product of various industrial sectors, ...

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 张颖姚倩袁自国
Owner UNIV OF SCI & TECH OF CHINA
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