Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of butylparaben

A technology of butylparaben and n-butanol, which is applied in the field of food additives to achieve the effects of good catalytic activity, excellent catalytic reaction performance and high selectivity

Inactive Publication Date: 2017-03-22
SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the used ammonium ferric sulfate is discharged as waste, which also brings certain pressure to environmental protection.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of butylparaben

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] (1) Catalyst preparation: wash, dry, and grind the ammonium ferric sulfate dodecahydrate used to catalyze the esterification reaction, put it in a crucible, put it into a muffle furnace and roast it at 550°C for 5 hours, and then place it to dry Cool to room temperature in a container, set aside;

[0021] (2) Add a certain amount of p-hydroxybenzoic acid, n-butanol, and the catalyst obtained in step (1) into a three-necked flask equipped with a stirrer, a water separator connected to the upper end of a reflux condenser, and a thermometer, wherein the amount of catalyst It is 5.3% of the total mass of p-hydroxybenzoic acid and n-butanol. The mass ratio of n-butanol and p-hydroxybenzoic acid is 3.5:1. Start stirring, heat to reflux, separate water, and react for 4 hours. After the reaction, separate the catalyst and water Recover n-butanol by steam distillation, pour the distilled residue into distilled water, adjust the pH to 7-8 with 10% sodium carbonate solution under ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
esterification rateaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of food additives and particularly relates to a preparation method of butylparaben. With the method, home-made solid super acid is used as a catalyst, p-hydroxybenzoic acid and n-butyl alcohol are used as reaction raw materials, and a product is obtained through an esterification reaction. The home-made catalyst is the solid super acid obtained by roasting ammonium ferric sulfate dodecahydrate. Ammonium ferric sulfate dodecahydrate is ammonium ferric sulfate dodecahydrate waste after catalysis of the esterification reaction. With the method, industrial waste is recycled, the discharge of the solid waste is reduced, and the method has the good environmental protection benefit; and meanwhile, the catalyst prepared with the method has the advantages of being good in catalytic activity, high in selectivity, capable of recycled repeatedly and the like.

Description

technical field [0001] The invention belongs to the field of food additives, in particular to a method for preparing butylparaben, in particular to a method for preparing butylparaben by reacting p-hydroxybenzoic acid and n-butanol under the action of a self-made solid superacid catalyst . Background technique [0002] Due to its high efficiency, broad spectrum, low toxicity, and easy compatibility, paraben is widely used in food, cosmetics, and pharmaceutical industries. It is one of the key development products in my country to replace food preservatives such as sodium benzoate. Among them, the antibacterial effect of butylparaben is due to ethyl and propyl esters, and the antiseptic effect is the best. Most domestic preparation technologies use concentrated sulfuric acid as a catalyst. Although this process has a high esterification rate, concentrated sulfuric acid is highly corrosive, requires high equipment, easily causes side reactions and produces a large amount of w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/84B01J27/053
CPCC07C67/08B01J27/053C07C69/84
Inventor 于龙张宁梁万根张超张永军闫敏敏王晓明张子汉
Owner SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com