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Synthesis of a series of new anti-oxidants

An antioxidant, a series of technologies, applied in organic chemistry, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as small molecular weight, changes in physical or chemical properties, and lack of chemical activity, etc., to achieve simple process , Conducive to the effect of industrial production

Inactive Publication Date: 2018-01-23
西安淳甄新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Generally, in the food and fine chemical industries, BHT (2,6-di-tert-butyl-p-cresol) antioxidant is commonly used, but due to its small molecular weight, the antioxidant effect is not long-lasting, and it is not effective for some fine chemicals. Some physical or chemical properties of the chemical will change after being added to the product, and the specific activity of the chemical cannot be achieved.

Method used

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  • Synthesis of a series of new anti-oxidants
  • Synthesis of a series of new anti-oxidants
  • Synthesis of a series of new anti-oxidants

Examples

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Comparison scheme
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specific Embodiment approach

[0023] Preparation of 2,6-di-tert-butyl-p-heptylphenol

[0024] Add 4-heptylphenol (100g), tert-butanol (192.7g) and glacial acetic acid (100ml) to a 1L three-necked flask equipped with a mechanical stirrer and a thermometer in sequence, under argon protection, and cool down to (0~ 5) °C, start to add concentrated sulfuric acid dropwise, dropwise to control the temperature (0~5) °C, after the dropwise addition, raise the temperature to (5~15) °C to react for 7hrs; slowly pour the reaction solution into constantly stirring ice water; use toluene Extraction, liquid separation, the aqueous phase was extracted twice with toluene, the combined organic phase was washed with saturated sodium chloride aqueous solution until neutral, the organic phase was filtered with anhydrous sodium sulfate, the organic phase was concentrated to dryness, and the concentrated dry crude product was Perform high vacuum distillation, add n-heptane to the obtained main fraction to dissolve evenly, pass t...

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Abstract

The invention discloses a preparation method of a series of anti-oxidants. The method comprises: reacting alkylphenol (2) with tert-butyl alcohol under concentrated sulfuric acid catalysis to generate2,6-di-t-butyl p-alkylphenol (1). The preparation method is simple in process, is economic and eco-friendly, and is suitable for industrial amplification requirement.

Description

technical field [0001] The invention relates to the technical field of route design and application of organic synthesis, in particular to a series of synthetic methods of novel antioxidants. Background technique [0002] Generally, in the food and fine chemical industries, BHT (2,6-di-tert-butyl-p-cresol) antioxidant is commonly used, but due to its small molecular weight, the antioxidant effect is not long-lasting, and it is not suitable for some fine chemicals. Some physical or chemical properties of the chemical will change after being added to the product, and the specific activity of the chemical cannot be achieved. Contents of the invention [0003] In view of the above problems, the purpose of the present invention is to provide a compound with a relatively large molecular weight and a preparation method, which will not affect the performance of the additive while ensuring the anti-oxidation effect. [0004] In order to achieve the above purpose, the present inven...

Claims

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Application Information

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IPC IPC(8): C07C37/11C07C39/06
Inventor 梁腾吴阳沈宁
Owner 西安淳甄新材料有限公司
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