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

Method for preparing potassium sorbate through sorbic acid neutralizing

A technology of potassium sorbate and sorbic acid, applied in the field of neutralization of sorbic acid to prepare potassium sorbate, can solve the problems of overheating, difficult to satisfy customers, severe local reactions, etc. Effect

Active Publication Date: 2019-04-02
NANTONG ACETIC ACID CHEM
View PDF13 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, potassium sorbate manufacturers at home and abroad use sorbic acid and potassium hydroxide to directly drop or feed into the liquid distributor for neutralization reaction, and then dry to obtain the finished product of potassium sorbate. Sorbic acid exists in the process of dropping neutralization The local reaction is severe, leading to local overheating and the oxidation of the double bond of sorbic acid, resulting in a decrease in the overall quality of the finished potassium sorbate product, such as light transmittance.

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

[0029] A kind of method that sorbic acid is neutralized and prepares potassium sorbate, comprises the following steps:

[0030] Add 100g of sorbic acid and 30g of deionized water into the reaction kettle with thermometer and stirring, start stirring, heat up to 40°C, 150g of 40% potassium hydroxide enters the reaction kettle after being atomized, and neutralizes with sorbic acid. Control the pH value between 10.0-12.0, add 3g of activated carbon, stir and decolorize at 40°C for 30 minutes, retest the pH value, add 40% potassium hydroxide to fine-tune the pH value between 10.0-12.0, and filter the neutralizing solution and spray dry to obtain sorbus The finished product of potassium acid potassium is 132.9g, the light transmittance is 99.3%, and the finished product does not change color after being placed for 100 days.

Embodiment 2

[0032] A kind of method that sorbic acid is neutralized and prepares potassium sorbate, comprises the following steps:

[0033] Add 100g of sorbic acid and 50g of deionized water into the reaction kettle with thermometer and stirring, start stirring, heat up to 60°C, 100g of 50% potassium hydroxide enters the reaction kettle after being atomized, and neutralizes with sorbic acid, Control the pH value between 10.0-12.0, add 10g of activated carbon, stir at 60°C for 30 minutes to decolorize, re-test the pH value, add 60% potassium hydroxide to fine-tune the pH value between 10.0-12.0, filter the neutralizing solution, and spray dry to obtain sorbus The finished product of potassium acid potassium is 133.2g, the light transmittance is 99.1%, and the finished product does not change color after being placed for 100 days.

Embodiment 3

[0035] A kind of method that sorbic acid is neutralized and prepares potassium sorbate, comprises the following steps:

[0036] Add 100g of sorbic acid and 40g of deionized water into the reaction kettle with thermometer and stirring, start stirring, heat up to 50°C, 125g of 45% potassium hydroxide enters the reaction kettle after being atomized, and neutralizes with sorbic acid, Control the pH value between 10.0-12.0, add 5g of activated carbon, stir at 50°C for 30 minutes to decolorize, re-test the pH value, add 45% potassium hydroxide to fine-tune the pH value between 10.0-12.0, and filter the neutralizing solution and spray dry to obtain sorbus Potassium acid finished product is 133.0g, the light transmittance is 99.6%, and the finished product does not change color after being placed for 100 days.

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
transmittivityaaaaaaaaaa
transmittivityaaaaaaaaaa
transmittivityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of chemical industry production, and specifically provides a method for preparing potassium sorbate through sorbic acid neutralizing. The process comprises: adding sorbic acid and non-ionized water to a reaction kettle, starting stirring, heating to a temperature of 40-60 DEG C, atomizing 40-50% potassium hydroxide at the top portion of the reactor, carrying outa neutralizing on the atomized potassium hydroxide and the sorbic acid, controlling the PH value at 10.0-12.0, adding active carbon, carrying out stirring decolorization for 30 min at a temperature of40-60 DEG C, re-measuring the PH value, micro-adjusting the PH value if the PH value is not 10.0-12.0, filtering the neutralizing liquid, and carrying out spray drying to obtain the finished productpotassium sorbate. According to the present invention, in the process, the potassium hydroxide is atomized to achieve the nanometer scale, and the nano-scale potassium hydroxide and the sorbic acid are subjected to a neutralizing reaction, such that the sorbic acid and the potassium hydroxide contact uniformly, the neutralizing process is mild, and the condition that the influence of the sorbic acid oxidation caused by the local reaction superheating on the quality of the potassium sorbate can be avoided.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to a method for preparing potassium sorbate by neutralizing sorbic acid. Background technique [0002] Potassium sorbate, English name: Potassium sorbate, potassium hexadiene-(2,4)-acid, molecular formula and molecular weight, C6H7KO2=150.22, physical and chemical properties: hygroscopic, easily soluble in water and ethanol. Appearance is white to light yellow scale-like crystals, crystalline powder or granular, odorless or slightly smelly, melting point: 270°C (decomposition); relative density: 1.363. [0003] Potassium sorbate is white to light yellow scale-like crystals, crystalline particles or crystalline powder, odorless or slightly odorous, it is easy to absorb moisture when exposed to the air for a long time, and is oxidized and decomposed to change color. Potassium sorbate is easily soluble in water, 67.6g / 100ml (20°C); 5% salt water, 47.5g / 100ml (room temper...

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): C07C51/41C07C57/10
CPCC07C51/412C07C57/10
Inventor 庆九俞新南朱小刚刘芳
Owner NANTONG ACETIC ACID CHEM
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