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

Preparation method of glycerinum dimethyl ether acetate

A technology of glyceryl dimethyl ether acetate and dimethyl ether acetate, which is applied in the field of preparation of glyceryl dimethyl ether acetate, can solve problems such as explosive steam/air mixture, and achieves high yield, high safety and high quality Effect

Inactive Publication Date: 2018-08-07
深圳市前海博扬研究院有限公司
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is flammable and may form an explosive vapor / air mixture when it is higher than 42°C, so there are certain safety problems in use

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 glycerinum dimethyl ether acetate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The present invention is a kind of preparation method of glycerol dimethyl ether acetate, mainly comprises the following steps:

[0021] S1, esterification, using glycerin and acetic acid as raw materials, the product glycerol monoacetate is obtained through the catalyzed reaction of a sulfonic acid catalyst;

[0022] S2. Methylation, using glycerol monoacetate and methyl iodide obtained in the step S1 as raw materials, using a phase transfer catalyst to catalyze the reaction in an alkaline environment to obtain the product glycerol dimethyl ether acetate.

Embodiment 1

[0024] Esterification reaction

[0025] Add 9.2kg of glycerol and 3kg of cyclohexane as raw material for esterification into a 30L normal-pressure reactor. The esterification reaction is a reversible reaction and will generate water. separated from the system. Substances that can be used as water-carrying agents must react with water to produce azeotropes to make water easier to be distilled, and the solubility in water is very small, and this program uses cyclohexane as the water-carrying agent. In addition, p-toluenesulfonic acid is also added in the reactor as a catalyst for the esterification reaction, and the reactor is heated to 60°C as the reaction temperature, and then 6 kg of acetic acid, another esterification raw material, is gradually added dropwise to the reactor to make it occur. Esterification produces glycerol monoacetate and water. And the reaction can utilize the reflux system with water separator at the same time, and the water phase of the lower layer is ...

Embodiment 2

[0034] Esterification reaction

[0035] Add 9.2 kg of glycerin and 3 kg of butanone as a water-carrying agent into a 30L normal-pressure reactor. The esterification reaction is a reversible reaction and will generate water. In order to improve the conversion rate, the water-carrying agent can be used to remove water from the reaction system separated out. Substances that can be used as water-carrying agents must react with water to produce azeotropes to make water easier to be distilled, and the solubility in water is very small, and this program uses cyclohexane as the water-carrying agent. In addition, methanesulfonic acid is also added in the reaction kettle as a catalyst for the esterification reaction, and the reaction kettle is heated to 80° C. as the reaction temperature, and then 6 kg of another esterification raw material acetic acid is gradually added dropwise to the reaction kettle to make it occur. Esterification produces glycerol monoacetate and water. And the r...

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 provides a preparation method of glycerinum dimethyl ether acetate, relating to the field of chemical synthesis. According to the method, glycerinum and acetic acid are mainly used as raw materials to perform esterification reaction to produce glycerinum acetate, and then glycerinum acetate and methyl iodide undergo methylation in an alkaline environment to produce a product, glycerinum dimethyl ether acetate. The preparation method is short in overall synthetic rout, low in industrial production cost, high in yield and high in quality. Furthermore, as a solvent, glycerinum dimethyl ether acetate has relatively high safety.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a preparation method of dimethyl glycerol acetate. Background technique [0002] Glycerol dimethyl ether acetate is a kind of mixed ether ester, its structural formula is: [0003] [0004] PGMEA is also called propylene glycol monomethyl ether acetate, and its molecular formula is C 6 h 12 o 3 , a colorless hygroscopic liquid with a special odor, is a non-pollution solvent with multifunctional groups. It is mainly used as a solvent for ink, paint, ink, textile dye, and textile oil, and can also be used as a cleaning agent in the production of liquid crystal displays. It is flammable and may form an explosive vapor / air mixture when it is higher than 42°C, so there are certain safety problems in use. Contents of the invention [0005] The technical problem to be solved by the present invention is to provide a new synthesis process of dimethyl glycerol acetate. [0006]...

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
IPC IPC(8): C07C67/29C07C69/14
CPCC07C67/29C07C67/08C07C69/14C07C69/18
Inventor 董研徐辑亮傅兵肖阳肖增钧
Owner 深圳市前海博扬研究院有限公司