Method for preparing ketonic acid

A technology for pinene acid and pinene, which is applied in the field of preparation of pinone acid, can solve the problems of harsh preparation conditions, long preparation time and high cost of preparation of pinone acid, achieves easy production environment and equipment, reduces production difficulty and shortens The effect of the production cycle

Inactive Publication Date: 2014-12-24
WUZHOU SONGHUA AROMATIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing method for preparing pinone acid by oxidation of α-pinene, due to the harsh preparation conditions and long preparation time, causes the problem that the preparation cost of pinone acid is too high and the sales price remains high. Seriously limit the popularization and use of pinone acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of this pinone acid may further comprise the steps:

[0020] A. Put 136g of α-pinene, 13.2g of ammonium sulfate and 7.84g of cetyl sodium sulfate into the reactor, add 627g of water, start stirring, control the temperature in the reactor to 5°C, and then add 237g of permanganese Potassium acid insulation reaction 8 hours; Wherein, the adding time of this potassium permanganate is controlled within 3 hours;

[0021] B. Suction filtration is performed on the material obtained by the reaction in step A, and the filtrate and filter cake are collected; the filter cake is washed once with water, the washing liquid is collected, and mixed with the filtrate to obtain a mixed solution;

[0022] C. Adjust the pH value of the mixed solution prepared in step B to 10, then extract it twice with benzene, and collect the water layer; wherein, for each extraction, the amount of benzene is 1 / 4 of the volume of the mixed solution;

[0023] D. Adjust the pH value o...

Embodiment 2

[0027] The preparation method of this pinone acid may further comprise the steps:

[0028] A. Put 136g α-pinene, 66g ammonium sulfate and 10.6g cetyl sodium sulfate into the reactor, add 851g water, start stirring, control the temperature in the reactor to 35°C, and then add 316g permanganese Potassium acid insulation reaction 6 hours; Wherein, the adding time of this potassium permanganate is controlled within 3 hours;

[0029] B. Suction filtration is performed on the material obtained by the reaction in step A, and the filtrate and filter cake are collected; the filter cake is washed with water for 3 times, the washing liquid is collected, and mixed with the filtrate to obtain a mixed solution;

[0030] C, adjusting the pH value of the mixed solution prepared in step B to 10, then extracting with benzene for 3 times, and collecting the water layer; wherein, for each extraction, the amount of benzene is 1 / 4 of the volume of the mixed solution;

[0031] D. Adjust the pH valu...

Embodiment 3

[0035] The preparation method of this pinone acid may further comprise the steps:

[0036] A. Put 136g α-pinene, 132g ammonium sulfate and 14g sodium cetyl sulfate into the reactor, add 1128g water, start stirring, control the temperature in the reactor to 25°C, then add 474g permanganate Potassium insulation reaction for 7 hours; wherein, the addition time of the potassium permanganate is controlled within 3 hours;

[0037] B. Suction filtration is performed on the material obtained by the reaction in step A, and the filtrate and filter cake are collected; the filter cake is washed twice with water, the washing liquid is collected, and mixed with the filtrate to obtain a mixed solution;

[0038] C, adjusting the pH value of the mixed solution prepared in step B to 10, then extracting with benzene for 3 times, and collecting the water layer; wherein, for each extraction, the amount of benzene is 1 / 4 of the volume of the mixed solution;

[0039] D. Adjust the pH value of the w...

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PUM

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Abstract

The invention discloses a method for preparing ketonic acid, belonging to the technical field of deep processing of turpentine. The method comprises the following steps: firstly, putting alpha-pinene, ammonium sulfate and cetyl sodium sulfate into a reactor, adding water, stirring, subsequently adding potassium permanganate for reaction, performing suction filtration, collecting the filtrate and the filter cakes, washing the filter cakes with water, mixing a scrubbing solution with the filtrate, adjusting the pH value by using acid, extracting by using benzene, collecting a water layer, adjusting the pH value of the water layer by using alkali, and subsequently drying, concentrating, filtering and washing, thereby obtaining ketonic acid. As the method does not need rigorous production conditions, and the production environment and the equipment are easy to achieve, the production difficulty of ketonic acid is effectively alleviated, the production period is shortened, and the production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of turpentine deep processing, and in particular relates to a preparation method of pinone acid. Background technique [0002] Pinone acid is produced by oxidation of α-pinene. It is chemically stable and is an extremely useful chemical intermediate. It can be used in plasticizers, spices, adhesives, synthetic resins, and chemical additives. Its molecular structure is as follows Show: [0003] . [0004] The existing method for preparing pinone acid by oxidation of α-pinene, due to the harsh preparation conditions and long preparation time, causes the problem that the preparation cost of pinone acid is too high and the sales price remains high. Seriously limit the popularization and use of pinone acid. Contents of the invention [0005] The technical problem solved by the present invention is to provide a preparation method of pinone acid, which has the advantages of mild production conditions, short ...

Claims

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Application Information

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IPC IPC(8): C07C51/31C07C59/205
CPCC07C51/31C07C51/47C07C51/48C07C51/50C07C2601/04C07C59/205
Inventor 杨韶平陈键泉刘娟娟陈伟强董俊谭育慧
Owner WUZHOU SONGHUA AROMATIC CHEM
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