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Composition, reaction system and method for preparing 1-naphthoic acid

A reaction system, naphthoic acid technology, applied in the chemical industry, can solve problems such as pollution, large investment in equipment, and many reaction steps, and achieve the effect of simple process, large investment in equipment, and short production cycle

Inactive Publication Date: 2018-01-16
黄石市利福达医药化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic production process is to use refined naphthalene as the starting material. After Friedel-Crafts reaction, 1-naphthyl ketone and 2-naphthyl ketone are obtained. Naphthoic acid, many reaction steps, large investment in equipment, serious pollution

Method used

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  • Composition, reaction system and method for preparing 1-naphthoic acid
  • Composition, reaction system and method for preparing 1-naphthoic acid

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preparation example Construction

[0043] Preparation methods include:

[0044] Step S101, providing a reaction space continuously fed with oxygen.

[0045] The reaction space is a container for various reagents to react, such as equipment used in various common chemical experiment reactions. The equipment or container may be a general-purpose device used in a laboratory, or a general-purpose device used in industrial mass production, or a device that is appropriately improved to meet the needs of a new production process as required or system.

[0046] For example, in an alternative example, the equipment is primarily a flask, and the reaction space is primarily a space defined by the flask. In addition, glass tubes, stirrers (such as magnetic stirrers), constant pressure dropping funnels, thermometers, reflux condensers, heating jackets, etc. can also be configured in the equipment.

[0047] Step S201, adding 1-methylnaphthalene, glacial acetic acid, cobalt acetate, manganese acetate, zirconium acetate, po...

Embodiment 1

[0062] Put 120g of 1-methylnaphthalene, 720g of glacial acetic acid, 4g of cobalt acetate, 4g of manganese acetate, 4g of bromide Potassium, 4g zirconium acetate, 2g triethanolamine, heat up to reflux and open oxygen 1L / min, maintain the reflux state and react with oxygen for 7 hours, take a sample to detect that the raw material is less than 0.5wt% as the reaction end point, cool and filter to obtain the crude product and mother liquor.

[0063] Among them, the crude product is to be refined to obtain 1-naphthoic acid, and the mother liquor is absorbed by activated carbon and used mechanically.

[0064] The method for the crude product to be refined to obtain 1-naphthoic acid is to add 2500mL water to a 5000mL beaker, and add liquid caustic soda for the crude product (liquid caustic soda is liquid sodium hydroxide, also known as caustic soda, caustic soda, the concentration of liquid caustic soda is usually 30-32% or 40-42%) to adjust the pH value to 8, raise the temperature ...

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Abstract

The invention provides a composition, a reaction system and a method for preparing 1-naphthoic acid, and belongs to the field of chemical industry. The composition is characterized in that 1-methylnaphthalene is treated as an initiator, and methyl of 1-methylnaphthalene is oxidized as carboxyl to be used for preparing 1-naphthoic acid, wherein the composition comprises glacial acetic acid, cobaltacetate, manganese acetate, zirconium acetate, potassium bromide and triethanolamine. The method for preparing 1-naphthoic acid is simple in processes, high in yield, small in production period, and low in pollution in process.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a composition, reaction system and method for preparing 1-naphthoic acid. Background technique [0002] 1-Naphthoic acid is a raw material for photosensitive chemicals, a raw material for sensitizers for photosensitive resins, a raw material for modified monomers that give special functions to special resins, etc. It is used in printing plates, films for making photosensitive resins, and photoresists. materials etc. In addition, 1-naphthoic acid is also an intermediate of new herbicides. At present, the domestic production process is to use refined naphthalene as the starting material. After Friedel-Crafts reaction, 1-naphthyl ketone and 2-naphthyl ketone are obtained. Naphthoic acid has many reaction steps, large investment in equipment and serious pollution. Contents of the invention [0003] Based on the deficiencies in the prior art, the present invention proposes a comp...

Claims

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Application Information

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IPC IPC(8): C07C51/265C07C63/36
Inventor 成家钢
Owner 黄石市利福达医药化工有限公司
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