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Catalyzing system for preparing acetaldehyde by acetylene liquid-phase hydratation and application thereof

A catalytic system, acetylene liquid technology, applied in the chemical field, can solve environmental and human hazards and other problems, achieve the effects of reducing harmful effects, avoiding harm, and solving the dependence on mercury catalysts

Inactive Publication Date: 2018-07-24
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional mercury catalyst for the liquid-phase hydration of acetylene to acetaldehyde will cause serious harm to the environment and human body

Method used

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  • Catalyzing system for preparing acetaldehyde by acetylene liquid-phase hydratation and application thereof
  • Catalyzing system for preparing acetaldehyde by acetylene liquid-phase hydratation and application thereof
  • Catalyzing system for preparing acetaldehyde by acetylene liquid-phase hydratation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] to combine figure 1 , the specific operation steps are as follows:

[0039] (1) After passing an inert gas into the reactor for 30 minutes and the temperature of the water bath reaches 60°C, add 1L of pure water solvent into the reactor, and after the temperature of the solvent is stabilized, add 5mol of ammonium chloride into the pure water solvent and make it Fully dissolved to obtain mixed solution 1;

[0040] (2) add 5mol cuprous chloride in mixed solution 1, treat that cuprous chloride dissolves completely, get mixed solution 2;

[0041] (3) After adding 30ml of 10mol / L hydrochloric acid solution and 1mol thiomalic acid to the mixed solution 2, continue nitrogen flow for 20min, remove the air in the reaction system, and mix uniformly to obtain a catalytic system;

[0042] (4) Then at 60°C, the air velocity is 100h -1 The acetylene gas, so that it undergoes hydration reaction in the reactor, the generated acetaldehyde and by-products enter the serpentine condense...

Embodiment 2

[0045] to combine figure 1 , the specific operation steps are as follows:

[0046] (1) After passing inert gas into the reactor for 30 minutes and the temperature of the water bath reaches 50°C, add 1L of mixed solvent into the reactor (the mixed solvent is N,N-dimethylformamide and water according to the volume ratio of 1:2.3 mixed), after the temperature of the solvent was stabilized, 2 mol of potassium chloride was added to the mixed solvent and fully dissolved to obtain the mixed solution 1;

[0047] (2) add 10mol cuprous chloride in mixed solution 1, treat that cuprous chloride dissolves completely, get mixed solution 2;

[0048] (3) After adding 0.5mol thiosalicylic acid and 0.5mol thioethanol to the mixed solution 2, continue nitrogen flow for 20min, remove the air in the reaction system, and mix uniformly to obtain a catalytic system;

[0049] (4) Then at 50°C, the air velocity is 100h -1 The acetylene gas, so that it undergoes hydration reaction in the reactor, the...

Embodiment 3

[0052] combine figure 1 , the specific operation steps are as follows:

[0053] (1) After passing an inert gas into the reactor for 30 minutes and the temperature of the water bath reaches 95°C, add 1 L of mixed solvent into the reactor (the mixed solvent is made by mixing ionic liquid and water at a volume ratio of 1:1, and the ionic liquid is 1-butylsulfonic acid-3 methylimidazole trifluoromethanesulfonate), after the solvent temperature is stable, 3mol ammonium chloride and 2mol sodium chloride are added in the mixed solvent, and make it fully dissolve, get mixed solution 1 ;

[0054] (2) add 2mol cuprous chloride in mixed solution 1, treat that cuprous chloride dissolves completely, get mixed solution 2;

[0055] (3) After adding 25ml of 10mol / L nitric acid solution, 15ml of 10mol / L acetic acid solution and 0.1mol thioglycolic acid in the mixed solution 2, continue to flow nitrogen for 20min, remove the air in the reaction system, and mix uniformly to obtain catalytic s...

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Abstract

The invention provides a catalyzing system for preparing acetaldehyde by acetylene liquid-phase hydratation and application thereof, and belongs to the technical field of chemistry. The catalyzing system comprises cuprous chloride, inorganic acid, sulfo organic acid, a solvent, an inorganic chloride or organic nitrogen containing hydrochloride, wherein the ratio of cuprous chloride to sulfo organic acid to inorganic acid to solvent is (2-10mol): (0.1-1mol): (0-0.6mol): 1L; the ratio of the inorganic chloride or organic nitrogen containing hydrochloride to solvent is (2-10mol): 1L. According tothe catalyzing system and the application thereof, the catalyzing system is capable of effectively catalyzing hydratation; and moreover, a mercury catalyst in existing liquid-phase acetylene hydratation can be completely replaced by a catalyzing system utilizing cuprous chloride as an active component, so that the independence of acetylene liquid-phase hydratation on the mercury catalyst is solved; and the harmful influence of the mercury catalyst on environment and human body can be reduced.

Description

technical field [0001] The invention belongs to the technical field of chemistry, and in particular relates to a catalytic system for preparing acetaldehyde by liquid-phase hydration of acetylene and an application thereof. Background technique [0002] Acetaldehyde is an important fine chemical intermediate, which can be used to generate acetic acid, acetic anhydride, butyraldehyde, butanol and other important basic organic synthesis intermediates. In 1961, mercury catalyst was used in industry to realize the production of acetaldehyde by hydration of acetylene. However, with the vigorous development of petrochemical industry, the process of hydrating acetylene to produce acetaldehyde was gradually replaced by the process of oxidizing ethylene to produce acetaldehyde. However, with the continuous depletion of global oil resources and the characteristics of China's energy structure, which is rich in coal and lacking in oil and gas, the energy and chemical industry with coal...

Claims

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Application Information

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IPC IPC(8): B01J31/30C07C45/26C07C47/06C07C49/08
CPCC07C45/26B01J23/30B01J27/02B01J27/10B01J27/122B01J27/188B01J27/24B01J31/0229B01J31/04B01J31/30B01J35/19B01J35/27C07C47/06C07C49/08
Inventor 代斌杨璐徐彩霞马存花肖芙蓉
Owner SHIHEZI UNIVERSITY
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