Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing sodium dehydroacetate

A technology of sodium dehydroacetate and a manufacturing method, applied in the manufacturing field of sodium dehydroacetate, can solve the problems of large equipment investment, long production cycle, safe production and the like, and achieve the effects of less equipment investment, less plant occupation, and energy saving

Inactive Publication Date: 2017-11-17
SHANGHAI CHONGMING BIOCHEM PLANT +1
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above method of producing sodium dehydroacetate is more loaded down with trivial details in technology, and synthetic reaction is to be medium with water, will make through processes such as concentration, cooling, filtration, drying, and its shortcoming is: (1) produce waste water, waste residue in production; (2) If organic solvent is used as the medium, waste gas will be generated, and there may even be safety production problems; (3) Energy consumption is large, production cost is high, production cycle is long, and equipment investment is large

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

[0024] Embodiment 1: Take 10 kilograms of dehydroacetic acid and 1.5 kilograms of sodium hydroxide and put them into the ball-milling reactor, adjust the rotational speed to 150 rpm, use water cooling to control the temperature at 25-60 ° C, and add 2.0 kilograms after 70 minutes. Sodium carbonate, continue grinding for 100 minutes, during this period, if the temperature rises, the grinding can be stopped, add 10 grams of calcium oxide, and add 2.5 kg of sodium carbonate at the same time, and finish grinding for 120 minutes. The dissolution test and the purity test are qualified, dried at 90 °C, and the finished product is packaged.

Embodiment 2

[0025] Embodiment 2: get 5 kilograms of dehydroacetic acid, add 0.78 kilograms of sodium hydroxide and 1.18 kilograms of sodium carbonate, put into the ball milling reactor, adjust the rotating speed to 150 rev / min, use water cooling to keep the temperature below 80 ℃, grind 50 minutes, then add 0.69 kg of sodium carbonate, continue to grind for 70 minutes, add 6 grams of calcium oxide, add 0.44 kg of sodium hydroxide, 10 grams of microcrystalline cellulose, and grind for 120 minutes to the end. The dissolution test and the purity test are qualified, dried at 90 °C, and the finished product is packaged.

Embodiment 3

[0026] Embodiment 3: Put 20 kg of dehydroacetic acid into a ball mill, add 1.48 kg of sodium carbonate, keep the pressure in the reaction system less than 0.08 MPa, and grind at a temperature of 20-50 ° C for 120 minutes, then add 5.6 kg of sodium carbonate and continue grinding For 700 minutes, add 1.3 kg of sodium hydroxide and 100 g of microcrystalline cellulose, and grind for another 120 minutes until the reaction ends. The dissolution test and the purity test are qualified, dried at 90 °C, and the finished product is packaged.

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 relates to a method for producing sodium dehydroacetate. The method comprises the following steps: dehydroacetic acid and / sodium carbonate and / sodium bicarbonate are mixed in a solid state and ground for a solid reaction, the temperature is controlled at -5-95 DEG C, and the pressure is controlled between 0.005 MPa and 0.15 MPa. The solid dehydroacetic acid and solid sodium hydroxide, sodium carbonate, and sodium bicarbonate are taken as the raw materials for a solid-solid reaction to obtain the sodium dehydroacetate; and a retardant and an anti-caking agent can be used for guaranteeing the smooth process of the reaction. The method has the advantages that 1) the production process is refined, 2) the occupied workshop is less, the equipment investment is low, 3) energy is saved; and 4) waste gas, waste water and waste residues cannot be generated.

Description

technical field [0001] The invention relates to a method for producing sodium dehydroacetate, which is characterized by a method for performing solid reaction sodium dehydroacetate by using solid reactants such as dehydroacetic acid and solid bases to mix and grind them. Background technique [0002] Sodium dehydroacetate is a low-toxicity and high-efficiency food preservative and preservative. It has a good inhibitory effect on mold, yeast and bacteria. It is widely used in food and feed processing industries. It can prolong the storage period and avoid mildew loss. . Its mechanism of action is to effectively penetrate into the cell body and inhibit the respiration of microorganisms, so as to achieve the effects of anti-corrosion, mildew-proof, fresh-keeping and moisturizing. [0003] At present, the production process of sodium dehydroacetate is a process commonly used at home and abroad, and the process is as follows: [0004] Dehydroacetic acid + sodium hydroxide (sodi...

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): C07D309/36
CPCC07D309/36
Inventor 陶爱华陶德明
Owner SHANGHAI CHONGMING BIOCHEM PLANT