Method for purifying sorbic acid

A technology of pure sorbic acid and sorbic acid, applied in the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problems of poor appearance of sorbic acid, equipment needs to be improved, and pungent odor, etc., and achieve good parallel reaction selection Performance and safety, cost reduction and equipment investment, and stable quality

Inactive Publication Date: 2017-05-24
于银强
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the equipment for large-scale production of sorbic acid at home and abroad is a general enamel reaction kettle. The mature process of the process is as follows: that is, the condensation reaction of ketene and crotonaldehyde under the action of a catalyst, followed by hydrolysis, drying, packaging and other processes The finished product is obtained, but because the sorbic acid produced by this process has a poor appearance, many impurities and a pungent smell
Therefore existing technology and equipment of this sorbic acid need to be improved

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The technology of melting crystallizer purification sorbic acid comprises the steps:

[0016] (1) Crystallization: first pass calcium chloride solution at -8°C at the bottom of the outer jacket of the melting crystallizer, the calcium chloride solution flows evenly on the outer wall of the melting crystallizer in a falling film, and then put the condensed sorbic acid solution into into the melting crystallizer, and at the same time through the melting crystallizer air duct using a compressor to 4m 3 The compressed air fed into the sorbic acid solution at a speed of 1 / min makes it form a slug-like flow bubble in the crystallization tube to rise, causing the turbulence of the melt, enhancing the mass transfer and heat transfer performance, and the sorbic acid solution drops on the inner wall of the crystallizer. The film flows down, gradually cools and crystallizes, and gradually grows a uniform crystal layer on the heat exchange surface. The concentration of the crystal ...

Embodiment 2

[0019] The technology of melting crystallizer purification sorbic acid comprises the steps:

[0020] (1) Crystallization: first pass sodium chloride solution at -6°C at the bottom of the outer jacket of the melting crystallizer, and the sodium chloride solution flows uniformly in a falling film on the outer wall of the melting crystallizer, and then put the condensed sorbic acid solution into into the melting crystallizer, and at the same time through the melting crystallizer air duct using a compressor to 5m 3 The compressed air fed into the sorbic acid solution at a speed of 1 / min makes it form a slug-like flow bubble in the crystallization tube to rise, causing the turbulence of the melt, enhancing the mass transfer and heat transfer performance, and the sorbic acid solution drops on the inner wall of the crystallizer. The film flows down, gradually cools and crystallizes, and gradually grows a uniform crystal layer on the heat exchange surface. The concentration of the cry...

Embodiment 3

[0023] The technology of melting crystallizer purification sorbic acid comprises the steps:

[0024] (1) Crystallization: first pass calcium chloride solution at -2°C at the bottom of the outer jacket of the melting crystallizer, the calcium chloride solution flows uniformly on the outer wall of the melting crystallizer in a falling film, and then put the condensed sorbic acid solution into into the melting crystallizer, and at the same time through the melting crystallizer air duct using a compressor to 7m 3 The compressed air fed into the sorbic acid solution at a speed of 1 / min makes it form a slug-like flow bubble in the crystallization tube to rise, causing the turbulence of the melt, enhancing the mass transfer and heat transfer performance, and the sorbic acid solution drops on the inner wall of the crystallizer. The film flows down, gradually cools and crystallizes, and gradually grows a uniform crystal layer on the heat exchange surface. The concentration of the cryst...

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

No PUM Login to view more

Abstract

The invention discloses a production technology for preparing high-purity sorbic acid by melt crystallization. The production technology comprises the following steps of firstly, sending freezing salt water into the bottom part of an outer jacket of a melt crystallization device, enabling the freezing salt water to uniformly flow along the outer wall of the crystallization device in a falling film way, feeding a crude sorbic acid solution into the melt crystallization device, enabling the sorbic acid solution to flow down along the inner wall of the crystallization device in the falling film way, gradually cooling and crystallizing, gradually growing a uniform crystal layer on the heat exchange surface, enabling the concentration of the crystal layer to be higher than the concentration of mixture solution, and enabling impurities to gradually enrich into the mixture solution; then, melting one part of crystal layer by adjusting the hot water temperature through a heat exchanger, and melting and removing the impurities with low melting point in the crystal layer, so as to further purify crystals. The production technology has the advantages that the method and technology are simple, the equipment structure is compact, the falling film type is adopted, the energy is decreased, and the cost and equipment investment are reduced at same time; the purity of a product produced by the melt crystallization device is high.

Description

technical field [0001] The invention relates to a method for purifying sorbic acid, in particular to a method for purifying sorbic acid with a melting crystallizer. Background technique [0002] Sorbic acid and its potassium salts can inhibit the growth of mold, and have been used as food preservatives for a long time, especially at low pH values, they can act as undissociated acids for preservatives. Sorbic acid has the characteristics that other preservatives do not have, that is, it has strong antiseptic selectivity. It can inhibit the growth of bacteria harmful to humans, but it is harmless to bacteria beneficial to humans. For example, it can inhibit the growth of cheese mold but does not Does not affect the growth of bacteria that help cheese ripen. Therefore, in the food industry, sorbic acid is widely used as a preservative for cheese, cakes and other pastries. Mainly used for mildew prevention of cheese, pickled vegetables, dried fruit, fruit juice, fruit syrup, b...

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): C07C57/10C07C51/43
CPCC07C51/43C07C57/10
Inventor 于银强
Owner 于银强
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap