Synthesis process for cyclohexyl acetate

A technology of cyclohexyl acetate and synthesis process, which is applied to the preparation of carboxylic acid esters, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of strong corrosion of concentrated sulfuric acid, complicated post-treatment, poor selectivity, etc., and achieve catalyst Less dosage, short reaction time, good stability

Inactive Publication Date: 2011-05-18
周丽
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In industry, acetic acid and cyclohexanol are commonly used as raw materials, and concentrated sulfuric acid is used as a catalyst to synthesize cyclohexyl acetate. However, concentrated sulfuric acid has problems such as strong corrosion, poor selectivity, complicated post-treatment, and three waste pollution.

Method used

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  • Synthesis process for cyclohexyl acetate
  • Synthesis process for cyclohexyl acetate
  • Synthesis process for cyclohexyl acetate

Examples

Experimental program
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Embodiment Construction

[0017] Processing step of the present invention is:

[0018] 1. Synthesis of copper p-toluenesulfonate

[0019] Put copper oxide and p-toluenesulfonic acid with a molar ratio of 3:4 to 1:1 in a round-bottomed flask, then add 150ml of deionized water, reflux for 3 to 5 hours, cool, precipitate blue crystals, filter, and dry; Recrystallize with ethanol for 2 to 4 times, dry in a vacuum oven to constant weight, and obtain copper p-toluenesulfonate crystals;

[0020] 2. Synthesis of cyclohexyl acetate

[0021] Add cyclohexanol and acetic acid with a molar ratio of 1.0:1 to 1.6:1 in a round bottom flask equipped with a water separator, a thermometer and a reflux condenser, and add the catalyst copper p-toluenesulfonate in an amount of 0.4 to 1.6g / 0.2mol acetic acid, the water-carrying agent is cyclohexane, the dosage of cyclohexane is 0-30ml / 0.2mol acetic acid; heat and reflux for 10-80min; , washed with water until neutral, dried, distilled, and the fraction with a boiling poi...

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Abstract

The invention relates to a synthesis process for a spice, in particular to a synthesis process for cyclohexyl acetate. The invention provides the synthesis process for the cyclohexyl acetate with simple operation, low pollution and high yield. The process comprises the steps of synthesis of copper p-toluenesulfonate and synthesis of the cyclohexyl acetate.

Description

Technical field: [0001] The present invention relates to a kind of synthesis technology of perfume, more specifically, relate to a kind of synthesis technology of cyclohexyl acetate. Background technique: [0002] Cyclohexyl acetate, also known as cyclohexyl acetate, is a colorless or slightly yellowish transparent oily liquid with a boiling point of 174.5°C, a refractive index of 1.4401, and a relative density of 0.969. It has a banana or apple flavor and is often used in preparations Spices such as apples, bananas, black currants and raspberries are widely used in food, beverage and cosmetic industries. At the same time, because cyclohexyl acetate has good solubility in resins, it is also commonly used as a solvent for paints and paints. The structural formula is shown in the figure below. [0003] [0004] cyclohexyl acetate [0005] In industry, acetic acid and cyclohexanol are commonly used as raw materials, and concentrated sulfuric acid is used as a catalyst to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/08
Inventor 周丽
Owner 周丽
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