Method for purifying acetone

A purification method and acetone technology, which are applied in the separation/purification of carbonyl compounds, organic chemistry, etc., can solve the problems of complicated operation steps, low acetone purity, high energy consumption, etc., and achieve a safe and simple purification process, stable product quality, and purity. high effect

Inactive Publication Date: 2013-09-04
TAICANG HUSHI REAGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for purifying acetone, so as to overcome the disadvantages of low purity of acetone purified products in the prior art, cumbersome operation steps, long time, large energy consumption and high cost

Method used

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  • Method for purifying acetone

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Embodiment 1

[0018] Add 25ml of 0.5mol / L silver nitrate solution and 5ml of 1mol / L sodium hydroxide solution to 1000ml of industrial grade acetone in turn, shake at room temperature for 10min, separate the acetone, add 135g of purification composition and heat to reflux until the purple color does not fade , then add anhydrous calcium sulfate, heat and reflux for 0.5h to dry, and finally carry out rectification at a flow rate of 20mL / min to collect fractions at 55-56.5°C to obtain 901ml of purified acetone with a purity of 99.503%;

[0019] Wherein, the purification composition is a composition of potassium permanganate, potassium perborate and iodine, and the mixing molar ratio thereof is 1:0.25:0.4.

Embodiment 2

[0021] Add 30ml of 0.75mol / L silver nitrate solution and 10ml of 1.5mol / L sodium hydroxide solution to 1000ml of industrial grade acetone, shake at room temperature for 15min, separate the acetone, add 140g of purification composition and heat to reflux until the purple color does not fade Then add anhydrous calcium sulfate, heat and reflux for 0.75h to dry, and finally carry out rectification at a flow rate of 15mL / min to collect fractions at 55-56.5°C to obtain 911ml of purified acetone with a purity of 99.512%;

[0022] Wherein, the purification composition is a composition of potassium permanganate, potassium perborate and iodine, the molar ratio of which is 1:0.5:0.6.

Embodiment 3

[0024] Add 35ml of 1mol / L silver nitrate solution and 15ml of 2mol / L sodium hydroxide solution to 1000ml of industrial grade acetone in turn, shake at room temperature for 20min, separate the acetone, add 145g of purification composition and heat to reflux until the purple color does not fade. Add anhydrous calcium sulfate and heat under reflux for 1 hour to dry, and finally carry out rectification at a flow rate of 10mL / min to collect fractions at 55-56.5°C to obtain 913ml of purified acetone with a purity of 99.515%;

[0025] Wherein, the purification composition is a composition of potassium permanganate, potassium perborate and iodine, the molar ratio of which is 1:0.1:0.2.

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Abstract

The invention discloses a method for purifying acetone. According to the method provided by the invention, industrial-grade acetone is used as a raw material, a silver nitrate solution and a sodium hydroxide solution are added into the industrial-grade acetone in sequence, acetone is separated after uniformly shaking, a purified composition is added, regurgitation is performed to enable the acetone to be purple without color fading, anhydrous calcium sulfate is added for drying, and finally a precise distillation method is used to collect, and fraction is performed at the temperature of 55-56.5 DEG C to obtain purified acetone. By adopting the method, the purity of the obtained acetone is more than 99.5%. Compared with the prior art, the method is safe, simple and convenient in the purification process, can save energy and reduce emission, and can meet requirements on green chemical industry and environmental protection; and the acetone obtained by the method is stable in product quality and high in purity, and has an industrial production prospect.

Description

technical field [0001] The invention relates to a method for purifying acetone. Background technique [0002] Acetone is the simplest ketone in the series of saturated fatty ketones. It has a special smell and can dissolve cellulose acetate and nitrocellulose. Acetone exists in nature in a free state. In the plant kingdom, it mainly exists in essential oils, such as tea oil, turpentine essential oil, citrus essential oil, etc.; human urine and blood, animal urine, marine animal tissues and body fluids all contain a small amount of acetone. Acetone vapor mixed with air can form an explosive mixture, the explosion limit is 2.55% to 12.8% (volume). The vapor pressure (kPa) of acetone is 53.32 (39.5°C), the heat of combustion (kJ / mol) is 1788.7, and the octanol-water partition coefficient (KOW) is -0.24. Miscible with water, miscible in ethanol, ether, chloroform, oils, hydrocarbons and most other organic solvents. The carbonyl group of acetone can undergo addition reactions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/08C07C45/78
Inventor 王伟顾小焱吕明王永旗
Owner TAICANG HUSHI REAGENT
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