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Production process of matricaria ester

A production process, the technology of mamethrin, applied in the chemical field, can solve the problems of low utilization rate of raw materials, and achieve the effects of small investment, reduced production cost, and simple and uncomplicated production process

Active Publication Date: 2013-02-27
金溪县鑫润香料实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can effectively solve the low utilization rate of raw materials, control and reduce the side reactions in the production process

Method used

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  • Production process of matricaria ester
  • Production process of matricaria ester
  • Production process of matricaria ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] One, the preparation technology of 2-methylpentanoic acid is:

[0039] (1) Feeding: Feed 160 kg of 2-methylpentanal and 1.6 kg of anhydrous sodium acetate, and then feed the air;

[0040] (2) Oxidation reaction: control temperature: 10-30°C, reaction time: 24 hours, air velocity 2.0-3.0m 3 / h;

[0041] (3) Cooling: cooling temperature: internal temperature ≤ 20 ℃;

[0042] (4) Vacuum fractionation: refraction measurement per hour: below 1.410 is the head, above 1.410 is the finished product, and the finished product meets the Q / 320583XYP019-2008 standard.

[0043] Two, the preparation technology of ethyl 2-methylpentanoate is:

[0044] (1) Feeding: Feed 250 kg of 2-methylpentanoic acid, 110 kg of ethanol and 2.5 kg of p-toluenesulfonic acid;

[0045] (2) Esterification reaction: control 110°C-130°C for 14 hours;

[0046] (3) Cooling: cooling temperature: internal temperature ≤ 40 ℃;

[0047] (4) Washing:

[0048] Inhale the crude product generated by the esterifi...

Embodiment 2

[0051] One, the preparation technology of 2-methylpentanoic acid is:

[0052] (1) Feeding: Feed 80 kg of 2-methylpentanal and 0.8 kg of anhydrous sodium acetate, and then feed the air;

[0053] (2) Oxidation reaction: control temperature: 0-15°C, reaction time: 25 hours, air velocity 1.5-2.0m 3 / h;

[0054] (3) Cooling: cooling temperature: internal temperature ≤ 20 ℃;

[0055] (4) Vacuum fractionation: refraction measurement per hour: below 1.410 is the head, above 1.410 is the finished product, and the finished product meets the Q / 320583XYP019-2008 standard.

[0056] Two, the preparation technology of ethyl 2-methylpentanoate is:

[0057] (1) Feeding: Feed 500 kg of 2-methylpentanoic acid, 220 kg of ethanol and 5 kg of p-toluenesulfonic acid;

[0058] (2) Esterification reaction: control 95°C-110°C for 12 hours;

[0059] (3) Cooling: cooling temperature: internal temperature ≤ 40 ℃;

[0060] (4) Washing:

[0061] Inhale the crude product generated by the esterification ...

Embodiment 3

[0064] One, the preparation technology of 2-methylpentanoic acid is:

[0065] (1) Feeding: Feed 200 kg of 2-methylpentanal and 2 kg of anhydrous sodium acetate, and then feed the air;

[0066] (2) Oxidation reaction: control temperature: 15°C, reaction time: 30 hours, air velocity 2.0m 3 / h;

[0067] (3) Cooling: cooling temperature: internal temperature ≤ 20 ℃;

[0068] (4) Vacuum fractionation: refraction measurement per hour: below 1.410 is the head, above 1.410 is the finished product, and the finished product meets the Q / 320583XYP019-2008 standard.

[0069] Two, the preparation technology of ethyl 2-methylpentanoate is:

[0070] (1) Feeding: Feed 1000 kg of 2-methylpentanoic acid, 440 kg of ethanol and 10 kg of toluenesulfonic acid;

[0071] (2) Esterification reaction: controlled at 110°C for 15 hours;

[0072] (3) Cooling: cooling temperature: internal temperature ≤ 40 ℃;

[0073] (4) Washing:

[0074] Inhale the crude product generated by the esterification reac...

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Abstract

The invention discloses a production process of matricaria ester, and a reaction process is as follows: 2-methyl amyl aldehyde has oxidation reaction with oxygen to generate 2-methyl valerate, the 2-methyl valerate has esterification reaction with ethanol to obtain ethyl 2-methylpentanoate, and the production process is characterized in that catalyst anhydrous sodium acetate is placed in the oxidation reaction of the 2-methyl valerate and oxygen, and catalyst toluenesulfonic acid is added in the esterification reaction of the 2-methyl valerate and the ethanol. The production process is simple and small in pollution; and since main byproduct is the water, and scraps also can be recycled to be used as fuel or for other purposes, so that basically no pollutant (waste) is discharged. The utilization rate of raw materials is high.

Description

technical field [0001] The invention belongs to the field of chemistry, and relates to a production process of mamethrin, in particular to a new process route for the synthesis of mamethrin. Background technique [0002] Maprothrin is a daily chemical essence with a wide range of uses. It can be used as a fragrance additive for washing products; it can also be used as a chemical raw material for the manufacture of medicines, etc. Has a good market prospect. In the prior art, mainly by the oxidation reaction of 2-methylvaleraldehyde and oxygen, 2-methylvaleric acid is generated, and the esterification reaction of 2-methylvaleric acid and ethanol obtains Maprothrin (2-methylvaleric acid Ethyl ester) crude product, after purification to obtain the finished product of mamethrin (>99.95%). The production process of conventional mamethrin is very prone to side reactions, and the content of the product is low, resulting in difficulties in fractionation and purification and low...

Claims

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Application Information

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IPC IPC(8): C07C69/24C07C67/08
Inventor 浦红卫
Owner 金溪县鑫润香料实业有限公司
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