A fixed-bed continuous production device for preparing propionitrile and its application

A technology for a production device and a fixed bed reactor, which is applied in the preparation of carboxylic acid nitrile, the preparation of organic compounds, organic chemistry, etc., can solve the problems of unsatisfactory conversion of acrylonitrile, harsh reaction conditions, and low selectivity of propionitrile, etc. Achieve the effect of inhibiting the disproportionation side reaction, low preparation cost and high selectivity of propionitrile

Active Publication Date: 2020-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gas-phase hydrogenation catalysts reported in the existing literature are often unstable and easily deactivated.
[0009] In summary, among the reaction conditions required by the catalysts used in the preparation of propionitrile by gas-phase catalytic hydrogenation of acrylonitrile, few can continuously catalyze the synthesis of propionitrile in a fixed bed, and the reaction conditions are relatively harsh, and the conversion rate of acrylonitrile is not ideal. , the selectivity of propionitrile is also low

Method used

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  • A fixed-bed continuous production device for preparing propionitrile and its application
  • A fixed-bed continuous production device for preparing propionitrile and its application
  • A fixed-bed continuous production device for preparing propionitrile and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A catalyst for preparing propionitrile, the catalyst includes a carrier part and a metal salt part, the carrier part is gamma-alumina carrier, and the metal salt part includes nickel salt, copper salt and zinc salt.

[0032] The specific surface area of ​​γ-alumina carrier is 220-225m 2 g -1 In the metal salt part, the weight percentage of nickel element accounts for 3%, the weight percentage of copper element accounts for 1%, and the weight percentage of zinc element accounts for 1%.

[0033]The catalyst has high activity, good stability, high dispersion of active components, long service life, high conversion rate of acrylonitrile, high selectivity of propionitrile, reducing the mass percentage of active component nickel makes the catalyst difficult to deactivate, and the addition of copper can Reduce the hydrogenation reaction activity, prevent the excessive hydrogenation of acrylonitrile to generate propylamine, and the addition of zinc can inhibit the occurrence o...

Embodiment 2

[0035] A catalyst for preparing propionitrile, the catalyst includes a carrier part and a metal salt part, the carrier part is gamma-alumina carrier, and the metal salt part includes nickel salt, copper salt and zinc salt.

[0036] The specific surface area of ​​γ-alumina carrier is 220-225m 2 g -1 In the metal salt part, the weight percentage of nickel element accounts for 10%, the weight percentage of copper element accounts for 3%, and the weight percentage of zinc element accounts for 3%.

[0037] The catalyst has high activity, good stability, high dispersion of active components, long service life, high conversion rate of acrylonitrile, high selectivity of propionitrile, reducing the mass percentage of active component nickel makes the catalyst difficult to deactivate, and the addition of copper can Reduce the hydrogenation reaction activity, prevent the excessive hydrogenation of acrylonitrile to generate propylamine, and the addition of zinc can inhibit the occurrence...

Embodiment 3

[0039] A preparation method for a catalyst preparing propionitrile, characterized in that the steps are as follows:

[0040] Step 1. Carrier roasting: take the gamma-alumina carrier and place it in a muffle furnace, and roast it at 600-700°C for 6-8 hours to obtain the roasted carrier;

[0041] Step 2, metal salt loading, 31.29gNi(NO 3 ) 2 ·6H 2 O, 8.01gCu(NO 3 ) 2 ·3H 2 O and 9.58gZn(NO 3 ) 2 ·6H 2 O was dissolved in 200ml of water to obtain an impregnating solution, and then put into 200g of γ-alumina for thorough mixing and impregnation until the impregnating solution was completely absorbed by γ-alumina. Then it was dried at 120°C for 5 hours, then calcined at 650°C for 7 hours, and cooled down to room temperature naturally to obtain catalyst A.

[0042] Catalyst A contains 3% Ni, 1% Cu and 1% Zn by weight respectively.

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Abstract

The invention discloses a catalyst for preparing propionitrile, a method for preparing the catalyst and a method and a device for applying the same. The catalyst comprises a carrier portion and a metal salt portion. The carrier portion is a gamma-aluminum oxide carrier, and the metal salt portion comprises nickel salt, copper salt and zinc salt. Compared with the prior art, the catalyst, the methods and the device have the advantages that the catalyst is high in activity, active component dispersity, acrylonitrile conversion rate and propionitrile selectivity, good in stability and long in service life; technologies for preparing the catalyst are simple, applied catalytic reaction is easy to control, and technologies are relatively simple; the catalyst is low in preparation cost and short in preparation process, is made of inexpensive materials and only has simple equipment requirements.

Description

technical field [0001] The invention relates to the technical field of chemical raw material production, in particular to a catalyst for preparing propionitrile, its preparation and use method and its application device. Background technique [0002] Acrylonitrile (molecular formula C 3 h 3 N, molecular weight 53.06, boiling point 77.3°C), as an important organic chemical raw material, occupies a prominent position in polymer materials such as synthetic fibers and synthetic resins, and has broad application prospects. In addition, acrylonitrile polymers and their derivatives are also widely used in building materials and daily necessities. Although the consumption composition of acrylonitrile is different in various countries in the world, generally speaking, about 61% of acrylonitrile in the world is used to produce polyacrylonitrile fiber (acrylic fiber), followed by the preparation of ABS / AS materials, others such as Production of barrier resins, nitrile rubber and lat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80C07C253/30C07C255/03
CPCB01J23/80C07C253/30C07C255/03
Inventor 钱超刘福洲黄晓华郑学根张静如
Owner CHINA PETROLEUM & CHEM CORP
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