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Method for preparing 2-fluoropropionate

A technology of fluoropropionate and chloropropionate, which is applied in the field of preparation of 2-fluoropropionate, can solve the problems of unavailable reaction raw materials and high production cost, and achieve low production of three wastes, low production cost and high product selection sex high effect

Active Publication Date: 2013-04-17
JUHUA GROUP TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the reaction raw materials are not easy to get, and the production cost is high

Method used

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  • Method for preparing 2-fluoropropionate
  • Method for preparing 2-fluoropropionate
  • Method for preparing 2-fluoropropionate

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In a stainless steel reaction kettle, add 100g ethyl 2-chloropropionate, 120g hydrogen fluoride and 2.0g titanium tetrachloride, stir and react at a temperature of 60°C for 24h, then pour the reaction solution into ice water, fully stir and mix, and use The crude product of ethyl 2-fluoropropionate was separated by separating funnel, and the crude product was rectified under reduced pressure to obtain 68.5g of ethyl 2-fluoropropionate product, the reaction yield was 77.7%, the product selectivity was 87.0%, and the content determined by GC was 98.2 %.

Embodiment 2

[0029] In a stainless steel reaction kettle, add 100g of ethyl 2-chloropropionate, 120g of hydrogen fluoride and 1.0g of tin tetrachloride, and after stirring for a reaction time of 30h at a temperature of 180°C, the reaction solution is poured into ice water, fully stirred and mixed, Separate the crude product of ethyl 2-fluoropropionate with a separating funnel, and rectify the crude product under reduced pressure to obtain 70.5g of ethyl 2-fluoropropionate product, the reaction yield is 80.0%, the product selectivity is 84.2%, and the content measured by GC is 98.5%.

Embodiment 3

[0031] In a stainless steel reaction kettle, add 100g methyl 2-chloropropionate, 130g hydrogen fluoride and 2.0g tin tetrachloride, stir and react at 80°C for 26h, then pour the reaction solution into ice water, fully stir and mix, divide The liquid funnel separated the oil phase to obtain the crude product of methyl 2-fluoropropionate. The crude product was rectified under reduced pressure to obtain 71.9 g of methyl 2-fluoropropionate. The reaction yield was 83.2%, and the product selectivity was 87.5%. The content was determined by GC 98.1%.

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Abstract

The invention discloses a method for preparing 2-fluoropropionate, comprising: reacting 2-chloropropionate, hydrogen fluoride and a catalyst according to the quantity ratio of 1:1.2-1.5:0.01-0.02 under 50-200 DEG C for 20-30h, cooling, separating liquid and rectifying after reacting to obtain the 2-fluoropropionate product. The invention has the advantages of high reaction yield, good selectivity of the product, low production cost and little generation amount of three wastes (waste gas,waste water and industrial residue). The reaction yield can reach up to 83.2%, and the highest selectivity of the 2-fluoropropionate is up to 87.5%.

Description

technical field [0001] The invention relates to a preparation method of fluoropropionate, in particular to a preparation method of 2-fluoropropionate. Background technique [0002] Plastic optical fiber has the advantages of large core diameter, soft texture, easy connection, light weight, low price, and large transmission bandwidth. It is used in broadband access network systems, home intelligent network systems, data transmission systems, automotive intelligent systems, industrial control systems and textiles , lighting, solar energy utilization systems and other aspects of the application market potential is huge. Although traditional plastic optical fibers such as polystyrene (PS), polymethyl methacrylate (PMMA), and polycarbonate (PC) have overcome some of the shortcomings of silica optical fibers, due to the inherent defects of the material itself, it has been difficult to meet the needs of modern communications. The rapid development of technology. [0003] Fluorine...

Claims

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Application Information

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IPC IPC(8): C07C67/307C07C69/63
Inventor 吾国强吕亮陈剑君许建帼王树华周强
Owner JUHUA GROUP TECH CENT
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