A kind of preparation method of synthetic n-butyl acetate catalyst

Abstract

The invention relates to a catalyst for synthesizing n-butyl acetate and a preparation method of the catalyst. The preparation method is characterized by comprising the following steps: uniformly stirring a waste catalyst with water and one or several of a dispersing agent, a pore-enlarging agent and an aid to prepare slurry, and shaping by virtue of strip extrusion, ball rolling, tabletting or spray drying; immersing shaped materials in a sulfate solution for 2-24 hours, and drying at 100-120 DEG C; roasting the dried materials at 300-600 DEG C for 1-10 hours, so as to prepare the catalyst. In an esterification reaction process, the catalyst is high in esterification rate and reaction speed, convenient to operate and easy to separate and can be repeatedly used; the preparation method is simple in flow and low in cost and has relatively high popularization and application values, and solid waste can be efficiently recycled and reused.

Description

technical field

[0001] The invention relates to a method for preparing a catalyst for synthesizing n-butyl acetate, which uses spent catalyst and sulfate as raw materials to prepare a highly active catalyst through molding, impregnating and roasting methods. It belongs to the field of inorganic material synthesis. Background technique

[0002] N-butyl acetate is prepared from acetic acid and n-butanol under the action of a catalyst. It is a colorless, transparent liquid with a fruity smell. It is miscible with alcohols, esters, ketones and most commonly used organic solvents. It is a kind of Excellent organic solvent, used in many fields, such as chemical industry, pharmaceutical, leather and so on.

[0003] In the traditional esterification reaction, concentrated sulfuric acid is generally used as a catalyst to synthesize n-butyl acetate. Due to the oxidizing and dehydrating properties of sulfuric acid, a series of side reactions are caused, the product purity is reduced,...

Examples

Embodiment 1

[0027] 590 g of spent catalyst fine powder, 65 ml of water glass, and 15 g of sodium hydroxide were added to water and stirred evenly to form a slurry with a solid content of 35% by weight, which was spray-dried to form microspheres with a particle size of 0-150 μm; 300 g of microspheres were immersed in 300 ml of 15 wt% ammonium sulfate solution for 8 h, and then dried at 120 °C; the dried material was calcined at 600 °C for 1 h to obtain catalyst A.

Embodiment 2

[0029] 200 g of spent catalyst, 10 g of sodium cellulose, 8 g of sodium carbonate, 18 ml of water glass, and water were added, ground in a ball mill for 2 h, and pressed on a tablet machine; % by weight aluminum sulfate solution, impregnated for 2 h, and then dried at 100 °C; the dried material was calcined at 300 °C for 10 h to obtain catalyst B.

Embodiment 3

[0031] 350 g spent catalyst fine powder, 30 ml water glass, 10 g potassium hydroxide, 8 g polyacrylamide, add water, and extrude on the extruder; 150 g strip material is immersed in 170 ml, 15% by weight of ammonium sulfate The solution was immersed for 12 h, and then dried at 110 °C; the dried material was calcined at 450 °C for 5 h to obtain catalyst C.

technical field

[0001] The invention relates to a method for preparing a catalyst for synthesizing n-butyl acetate, which uses spent catalyst and sulfate as raw materials to prepare a highly active catalyst through molding, impregnating and roasting methods. It belongs to the field of inorganic material synthesis. Background technique

[0002] N-butyl acetate is prepared from acetic acid and n-butanol under the action of a catalyst. It is a colorless, transparent liquid with a fruity smell. It is miscible with alcohols, esters, ketones and most commonly used organic solvents. It is a kind of Excellent organic solvent, used in many fields, such as chemical industry, pharmaceutical, leather and so on.

[0003] In the traditional esterification reaction, concentrated sulfuric acid is generally used as a catalyst to synthesize n-butyl acetate. Due to the oxidizing and dehydrating properties of sulfuric acid, a series of side reactions are caused, the product purity is reduced,...

Examples

Embodiment 1

[0027] 590 g of spent catalyst fine powder, 65 ml of water glass, and 15 g of sodium hydroxide were added to water and stirred evenly to form a slurry with a solid content of 35% by weight, which was spray-dried to form microspheres with a particle size of 0-150 μm; 300 g of microspheres were immersed in 300 ml of 15 wt% ammonium sulfate solution for 8 h, and then dried at 120 °C; the dried material was calcined at 600 °C for 1 h to obtain catalyst A.

Embodiment 2

[0029] 200 g of spent catalyst, 10 g of sodium cellulose, 8 g of sodium carbonate, 18 ml of water glass, and water were added, ground in a ball mill for 2 h, and pressed on a tablet machine; % by weight aluminum sulfate solution, impregnated for 2 h, and then dried at 100 °C; the dried material was calcined at 300 °C for 10 h to obtain catalyst B.

Embodiment 3

[0031] 350 g spent catalyst fine powder, 30 ml water glass, 10 g potassium hydroxide, 8 g polyacrylamide, add water, and extrude on the extruder; 150 g strip material is immersed in 170 ml, 15% by weight of ammonium sulfate The solution was immersed for 12 h, and then dried at 110 °C; the dried material was calcined at 450 °C for 5 h to obtain catalyst C.