Acetylene dimerization nonaqueous-phase catalyst and application thereof

A catalyst, non-aqueous phase technology, applied in the field of acetylene dimerization non-aqueous phase catalysts, can solve the problems of low selectivity of vinyl acetylene, low single-pass conversion rate, reduced catalyst service life, etc., and achieve the effect of increasing single-pass conversion rate.

Active Publication Date: 2016-07-13
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are related reports on the modification of non-aqueous catalysts, there are still major problems in the non-aqueous catalytic system of acetylene dimerizati

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 7 mL of N,N-dimethylformamide and 3 mL of 1,4-dioxane mixed organic solvent into the reactor, add 0.05 mol of ethylamine hydrochloride as a co-solvent, and pass nitrogen gas under the condition of 60-90°C to Ethylamine hydrochloride is fully dissolved; maintain a constant reaction temperature, add 0.006 mol of reducing agent ascorbic acid; under the condition of continuously bubbling nitrogen, finally add 8 g of main catalyst cuprous chloride, and continue to blow nitrogen for 30 minutes. After the catalyst is fully dissolved, switch nitrogen to acetylene and keep the acetylene space velocity at 100-250h -1 , the generated gas was monitored in real time by gas chromatography, the conversion rate of acetylene, the selectivity of vinyl acetylene and the yield of acetylene are shown in Table 1.

Embodiment 2

[0025] The reducing agent in the present embodiment is sodium ascorbate 0.006mol, and other reaction conditions are identical with embodiment 1. The conversion rate of acetylene, the selectivity of vinyl acetylene and the yield of acetylene are shown in Table 1.

Embodiment 3

[0027] The reducing agent in this embodiment is potassium ascorbate 0.006mol, 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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Abstract

The invention relates to an acetylene dimerization nonaqueous-phase catalyst and application thereof. The acetylene dimerization nonaqueous-phase catalyst comprises a main catalyst, a cosolvent, an organic solvent and a reducing agent, wherein the main catalyst is cuprous chloride; the cosolvent is organic amine hydrochloride; the reducing agent is a mixture of one or more than two selected from a compound containing two or more hydroxys, sodium sulfite and copper powder; the compound containing two or more hydroxys refers to ascorbic acid, sodium ascorbate, kalium ascorbate, glucose, fructose and the like. The application of the catalyst in acetylene dimerization reaction comprises the following steps of: adding the catalyst into a reactor, then introducing acetylene into the reactor, and performing a dimerization reaction on acetylene at a reaction temperature of 60-90 DEG C and an acetylene airspeed of 100-250 h<-1>, so as to generate vinylacetylene. The catalyst is added with weak reducing agents such as ascorbic acid, so as to inhibit Cu<1+> of catalytic active ingredients in a reaction solution from being converted into Cu<2+>, and the conversion per pass of acetylene is increased.

Description

technical field [0001] The invention relates to a catalyst, in particular to an acetylene dimerization non-aqueous phase catalyst and application thereof. Background technique [0002] Vinyl acetylene is an important fine chemical intermediate, which is widely used in the production of various important chemical products such as neoprene, benzene and styrene. Among them, neoprene, as one of the seven major synthetic rubbers, has good comprehensive physical properties, such as resistance to combustion, light resistance, oxidation resistance, etc., and is generally used in the production of auto parts, machinery and industrial products and adhesives, etc. , coated fabrics, wires / cables, etc. are also widely used. At present, there are acetylene method and butadiene method for the industrial production of chloroprene rubber monomer (2-chloro-1,3-butadiene). Due to my country's special energy structure of "poor oil, little gas, and rich coal", 2-chloro-1,3-butadiene is mainly ...

Claims

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Application Information

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IPC IPC(8): B01J31/30B01J27/122C07C2/38C07C11/30
CPCB01J27/122B01J31/30B01J2231/20B01J2531/90C07C2/38C07C2527/122C07C2531/30C07C11/30
Inventor 代斌刘海月谢建伟刘平
Owner SHIHEZI UNIVERSITY
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