Method for preparing acetonitrile

A technology of acetonitrile and carrier, applied in the field of highly selective preparation of acetonitrile, which can solve the problems of environmental pollution and hazards, and achieve the effect of sufficient raw material sources and recyclable raw material sources

Active Publication Date: 2019-02-22
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If such waste organic plastics are directly discarded into the env

Method used

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  • Method for preparing acetonitrile
  • Method for preparing acetonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Test the influence of different catalysts loaded on HZSM-5 molecular sieves with different types of active metal oxides on the selectivity and yield of acetonitrile

[0059] In this example, different metals (Fe, Cu, Zn, Ni, Co, Cr, Mg, Ca, Ga, and Zr) were supported on the HZSM-5 molecular sieve carrier by the aforementioned impregnation method, wherein based on the total mass of the catalyst, The content of active metal oxides (calculated by their corresponding metal elements) is 2.0wt%.

[0060] Reaction conditions: The raw material is waste organic plastic powder composed of 3.0g of polylactic acid, 1.0g of polybutylene succinate and 1.0g of polyethylene succinate after grinding; use various powders after grinding Catalyst (<140 mesh) and the loading amount of the catalyst is 1.0 g; the carrier gas is composed of 100% ammonia and the flow rate is 80 ml / min; the reaction temperature is 650° C.; the feed reaction time is 30 min.

[0061] The liquid organic...

Embodiment 2

[0065] Embodiment 2: Test the impact of different catalysts loaded on different carriers with Co metal oxides on the selectivity and yield of acetonitrile

[0066] In this example, the corresponding catalysts were obtained by loading active metal Co on different supports by impregnation method, wherein the content of active metal oxides (calculated as Co element) was 2.0 wt% based on the total mass of the catalyst.

[0067] Reaction conditions: The raw material is waste organic plastic powder composed of 3.0g of polylactic acid, 1.0g of polybutylene succinate and 1.0g of polyethylene succinate after grinding; use various powders after grinding Catalyst (<140 mesh) and the loading amount of the catalyst is 1.0 g; the carrier gas is composed of 100% ammonia and the flow rate is 80 ml / min; the reaction temperature is 650° C.; the feed reaction time is 30 min.

[0068] According to the same program of Example 1, the results of the acetonitrile selectivity (%), acetonitrile yield (...

Embodiment 3

[0072] Example 3: Test the catalytic effect of Ni / HZSM-5 catalyst on the preparation of acetonitrile from waste organic plastics composed of different components.

[0073] In this example, the Ni / HZSM-5 catalyst obtained in Example 1 was used, wherein the content of active metal oxide (calculated as Ni element) was 2.0 wt% based on the total mass of the catalyst.

[0074] Reaction conditions: the raw material is waste organic plastic powder (5.0 g) composed of polylactic acid, polybutylene succinate and polyethylene succinate respectively after grinding; use ground Ni / HZSM-5 Powdered catalyst (<140 mesh) and the loading amount of the catalyst is 1.0g; the carrier gas is composed of 100% ammonia and the flow rate is 80ml / min; the reaction temperature is 650°C; the feed reaction time is 30min.

[0075] According to the same program of Example 1, the results of the acetonitrile selectivity (%), acetonitrile yield (%), propionitrile yield (%) and liquid organic product yield (%) o...

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Abstract

The invention discloses a method for preparing acetonitrile. The method comprises the following steps: heating waste organic plastic in a reactor in the presence of a catalyst and carrier gas and reacting; then cooling and separating to obtain a liquid product containing the acetonitrile, wherein the catalyst is composed of a carrier and active metal oxide, the carrier gas is composed of reactivenitrogen-containing compound gas and random inert gas and the reactive nitrogen-containing compound gas is selected from ammonia gas, methylamine gas, dimethylamine gas, ammonium salt pyrolysis gas, urea pyrolysis gas or a combination thereof. According to the method disclosed by the invention, the waste organic plastic is used as a raw material and an acetonitrile product is highly selectively prepared through a simple preparation process, the environment pollution can be reduced and waste utilization is realized. Furthermore, the method is a renewable, green and environment-friendly route ina whole process from the raw material to a production technology and has a great industrial prospect.

Description

technical field [0001] The invention relates to the fields of organic synthesis and environmental protection, in particular to a new method for preparing acetonitrile with high selectivity. Background technique [0002] Acetonitrile, also known as methyl cyanide, the English name is Acetonitrile, the molecular formula is C 2 h 3 N, the molecular weight is 41.05. Acetonitrile is the simplest saturated aliphatic nitrile. It is a colorless transparent liquid at normal temperature and pressure. It has a special odor similar to ether and is extremely volatile. Acetonitrile has excellent solvent properties and can dissolve various inorganic, organic and gaseous compounds. In addition to the characteristics of solvents such as ethanol and methanol, it also has better distribution ratio and desorption capacity than alcohols. Acetonitrile is a relatively stable nitrile compound, which is not easy to undergo oxidation or reduction reactions, but is prone to addition reactions betw...

Claims

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Application Information

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IPC IPC(8): C07C253/00C07C255/03
CPCC07C253/00C07C255/03
Inventor 张颖袁自国张鑫
Owner UNIV OF SCI & TECH OF CHINA
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