Method for catalyzing and synthesizing butylparaben by using gallium sulfate

A technology of butylparaben and gallium sulfate, which is applied in the field of food additives, can solve problems such as poor safety, and achieve the effect of convenient post-processing

Inactive Publication Date: 2010-06-30
孟奇伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The environment-friendly synthesis of butylparaben is helpful for the elimination of foods that are commonly used in my country but have poor safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0008] Add 0.05mol of p-hydroxybenzoic acid and a certain pier of n-butanol and catalyst gallium sulfate in a three-necked flask equipped with a thermometer, water separator, and reflux condenser. The water separator is pre-filled with n-butanol, start electromagnetic stirring, and heat Reflux the reaction and start timing when condensate appears. After reacting for a certain period of time, cooling and standing still, the reaction solution is transferred to a distillation bottle by decantation, and the unreacted n-butanol can be separated by vacuum distillation, which can be recycled, and the catalyst is left at the bottom of the bottle for repeated use. Pour the distilled residue into distilled water, adjust the pH to 7-8 with 10% sodium carbonate solution, stir first and then let stand until all solid products are precipitated, filter with suction, wash, and dry at 42°C to constant weight to obtain White powder product. Calculate the yield by weighing.

[0009] The optimal...

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PUM

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Abstract

The invention belongs to the technical field of food additives, in particular to a method for catalyzing and synthesizing butylparaben by using gallium sulfate. In the method, p-hydroxybenzoic acid and n-butanol are taken as main raw materials to synthesize the butylparaben, the gallium sulfate is firstly adopted as a catalyst, and the reaction conditions are that: the mass ratio of alcohol acid matters is 4, the catalysis utilization amount is 0.6g, the reaction time is 5h, and the yield reaches 94.8 percent. The catalyst synthesized by the method has the advantages of high catalytic activity, convenient aftertreatment, no addition of aqueous agents, and the like, and is suitable for industrialized production.

Description

Technical field: [0001] The invention belongs to the technical field of food additives, in particular to a method for synthesizing butylparaben by using gallium sulfate as a catalyst. Background technique: [0002] The preservative paraben, also known as p-hydroxymushroom benzoate, has the advantages of high efficiency, low toxicity, broad spectrum, and easy compatibility, so it is not only the mainstream food preservative in many developed countries, but also widely used in Japan. Anticorrosion in the chemical, pharmaceutical and feed industries. Among them, the antibacterial effect of butylparaben is better than that of propyl and ethyl esters, and the antiseptic effect is the best. The preservative benzoic acid and its sodium salt are of great importance. Butylparaben is a safe and efficient preservative and cleaning disinfectant widely used in food, cosmetics, daily chemical and pharmaceutical industries. One of the most developed food preservatives. Industrially, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/84C07C67/08B01J27/053
Inventor 孟奇伟
Owner 孟奇伟
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