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Manufacturing method of propyl acetate and isopropyl acetate

A technology of isopropyl acetate and its manufacturing method, which is applied in the field of acetate manufacturing, can solve the problems of waste water pollution, high manufacturing cost, and low yield, and achieve the goals of reducing manufacturing cost, improving raw material utilization, and reducing environmental pollution Effect

Inactive Publication Date: 2006-06-14
章浩龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process still has many side reactions, low y

Method used

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  • Manufacturing method of propyl acetate and isopropyl acetate
  • Manufacturing method of propyl acetate and isopropyl acetate

Examples

Experimental program
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Effect test

Embodiment 1

[0015] In a 5-liter three-necked flask with a reflux condenser, add 0.3Kg of aluminum particles with a purity of 99%, 1.5 grams of anhydrous aluminum chloride, 2Kg of ethyl acetate solvent, then add 0.8Kg of isopropanol, stir, heat, and control The temperature of the solution is around 80°C, and after reflux reaction for 2 hours, a black mixture solution is obtained, the material is sucked out, and after 20 hours of settlement, the upper layer accounts for 98%-99% of the colorless, transparent solution, and the solution is heated to 80°C Start the distillation. With the evaporation of the solvent, the distillation temperature is gradually increased to 110°C, the heating is stopped, and the evaporation residue is cooled to obtain a mixed aluminum alcohol solid, the main components of which are aluminum ethoxide and aluminum isopropoxide. The evaporated mixed solvent was separated by two-step rectification to obtain 1100 g of isopropyl acetate finished product, with a content gre...

Embodiment 2

[0017] In a 5-liter three-necked flask with a reflux condenser, add 0.25Kg of aluminum particles with a purity of 99%, 0.28 grams of anhydrous aluminum chloride, 2Kg of ethyl acetate, and then add 0.5Kg of isopropanol, stir and heat to control the solution After 2.5 hours of reflux reaction at a temperature of about 80°C, a black mixture solution is obtained, the material is sucked out, and after 15 hours of settlement, the upper layer accounts for 98%-99% of the colorless, transparent solution, and the solution is heated to 80°C to start Distillation, with the evaporation of the solvent, the distillation temperature is gradually increased to 110 ° C, the heating is stopped, and the evaporation residue is cooled to obtain a mixed aluminum alcohol solid, the main components of which are aluminum ethoxide and aluminum isopropoxide. The evaporated mixed solvent is separated by two-step rectification to obtain 750g of isopropyl acetate product, the content of which is greater than ...

Embodiment 3

[0019] In a 5-liter three-necked flask with a reflux condenser, add 0.1Kg of aluminum particles with a purity of 99%, 6.2 grams of anhydrous aluminum chloride, 2Kg of ethyl acetate, and then add 1Kg of isopropanol, stir and heat, and control the temperature of the solution Reflux reaction at about 80°C for 3 hours to obtain a black mixture solution, suck out the material, settle after 24 hours, suck out the colorless and transparent solution with 98%-99% of the upper layer, heat this solution to 80°C to start distillation , with the evaporation of the solvent, the distillation temperature is gradually increased to 110 ° C, the heating is stopped, and the evaporation residue is cooled to obtain a mixed aluminum alcohol solid, the main components of which are aluminum ethoxide and aluminum isopropoxide. The evaporated mixed solvent is separated by two-step rectification to obtain 1250g of isopropyl acetate finished product, the content of which is greater than 99%. The main impur...

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Abstract

The present invention relates to a preparation method of propyl acetate/isopropyl acetate. Said method includes the following steps: using propyl alcohol/isopropyl alcohol, metal aluminium and ethyl acetate as raw material, adding initiator, heating and making reflux reaction to form propyl acetate/isopropyl acetate and mixed alcohol aluminium, utilizing deposition process to remove impurity, evaporating, condensing and recovering to obtain alcohol ester mixed solution, rectification and purification so as to obtain propyl acetate/isopropyl acetate. The weight ratio of the above-mentioned propyl alcohol/isopropyl alcohol, metal aluminium and ethyl acetate is 1:0.2-0.5:2-4, and the described initiator is anhydrous aluminium chloride.

Description

technical field [0001] The present invention relates to a kind of manufacture method of acetate, especially a kind of manufacture method of propyl acetate and isopropyl acetate. Background technique [0002] Propyl acetate and isopropyl acetate can be used in organic synthesis and as solvents in coatings, inks and other industries. They are also commonly used dehydrating agents, drug extractants and fragrance components in industry. It has excellent dissolving power for various synthetic resins, and is a good solvent for many synthetic resins such as ethyl cellulose, polystyrene, and methacrylate. [0003] The production of isopropyl acetate is mainly produced by the esterification of acetic acid and isopropanol under the catalysis of sulfuric acid. In order to overcome the shortcomings of this process, "Journal of Natural Sciences of Hunan Normal University", Vol. 20, No. 1 (published in March 1997) " p-toluenesulfonic acid catalyzed synthesis of isopropyl acetate" documen...

Claims

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Application Information

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IPC IPC(8): C07C69/12C07C67/03
Inventor 章浩龙
Owner 章浩龙
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