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Acetylene dimerization water-phase catalyst and application thereof

A technology of catalysts and main catalysts, which is applied in the direction of catalysts, carbon compound catalysts, physical/chemical process catalysts, etc., and can solve the problems of low vinyl acetylene selectivity and low single-pass conversion rate of acetylene

Active Publication Date: 2019-07-23
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are relevant reports on the modification of aqueous Newland catalysts, there are still many problems in its system for acetylene dimerization, such as: (1) low single-pass conversion of acetylene; (2) low vinyl acetylene selectivity

Method used

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  • Acetylene dimerization water-phase catalyst and application thereof
  • Acetylene dimerization water-phase catalyst and application thereof
  • Acetylene dimerization water-phase catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] combine figure 1 , the specific operation steps are as follows:

[0035] (1) Add 10ml of water into the bubbling bed reactor (self-made, inner diameter 10mm, length 40mm), then add 0.1mol ammonium chloride as a co-solvent, and under the condition of 60-90°C, blow nitrogen gas to fully dissolve the ammonium chloride. Keeping the reaction temperature constant, 0.1 mol of cuprous chloride was added.

[0036] (2) Under the condition of continuously feeding nitrogen gas, p-aminobenzenesulfonic acid was added, and the amount of ligand added was 0.0045 mol.

[0037] (3) After all the above are dissolved, switch the nitrogen to acetylene and keep the space velocity at 55-155h -1 , and the gas after the reaction is monitored in real time by a gas chromatograph. The conversion rate of acetylene, the selectivity of vinyl acetylene and the yield of acetylene are shown in Table 1.

[0038] Catalyst Evaluation Method

[0039] Utilize gas chromatograph to carry out component and ...

Embodiment 2

[0046] The sulfonic acid ligand in this example is 1-amino-2-naphthol-4-sulfonic acid, and other reaction conditions are the same as in Example 1. The conversion rate of acetylene, the selectivity of vinyl acetylene and the yield of acetylene are shown in Table 1.

Embodiment 3

[0048]The sulfonic acid ligand in this example is phenylhydrazine-4-sulfonic acid, and other reaction conditions are the same as in Example 1. The conversion rate of acetylene, the selectivity of vinyl acetylene and the yield of acetylene are shown in Table 1.

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PUM

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Abstract

The invention relates to an acetylene dimerization water-phase catalyst and application thereof. The acetylene dimerization water-phase catalyst is prepared from: a main catalyst, a co-solvent, a solvent and a ligand, wherein the main catalyst is cuprous chloride; the co-solvent is ammonium chloride; the ligand is a sulfonic acid or phosphonic acid ligand. The invention further discloses the application of the catalyst to acetylene dimerization reaction. The invention provides the acetylene dimerization water-phase catalyst and the application thereof; one sulfonic acid or phosphonic acid ligand is added into the catalyst, so that on one hand, the ligand can form a coordination bond with Cu and the reaction activity of Cu<+> can be improved in water; on the other hand, part of Cu<2+> is reduced through the ligand, a condition that a catalytic active component Cu<+> in a reaction solution is converted into the Cu<2+> is inhibited, the content of the Cu<+> is increased and the reaction activity is improved, so that the single-pass conversion of acetylene is increased.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to an acetylene dimerization water-phase catalyst and its application. Background technique [0002] Vinyl acetylene, as a downstream product of acetylene, is an important raw material for the production of neoprene rubber and adhesives. Neoprene rubber (Chloroprene rubber, CR), as one of the seven synthetic rubbers, is a synthetic polymer material with broad application prospects in various fields of production and life. Based on the current situation of "rich coal, poor oil and little gas", the acetylene method (acetylene dimerization to produce vinyl acetylene, and then vinyl acetylene (Monovinyl acetylene, MVA) reacts with hydrogen chloride to produce chloroprene) is the first choice for the production of chloroprene rubber in my country. main route. Acetylene dimerization is a key step in this route, which directly affects the yield, cost and quality of the final...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/12C07C2/38C07C11/30
CPCB01J31/226B01J31/1865C07C2/38B01J2531/16B01J2531/96C07C2531/22B01J35/27C07C11/30
Inventor 谢建伟张启霞代斌
Owner SHIHEZI UNIVERSITY