阅读说明：本技术 一种甲基磺酰氯制备甲基磺酰氟的方法 (Method for preparing methanesulfonyl fluoride from methanesulfonyl chloride ) 是由 朱姜涛 范娜 姚刚 李柄缘 吝子东 李林 王志民 张雷 倪珊珊 于 2020-12-15 设计创作，主要内容包括：本发明涉及一种甲基磺酰氯制备甲基磺酰氟的方法,属于精细化工领域；所述方法如下：将催化剂加入到甲基磺酰氯中,将温度控制在50℃～100℃,不断搅拌,同时,通入无水氟化氢进行反应,反应时间为1h～10h,得到甲基磺酰氟；所述方法是以甲基磺酰氯为原料,在催化剂的作用下,甲基磺酰氯直接与无水氟化氢发生氟化反应,生成甲基磺酰氟；由该方法制得的甲基磺酰氟产率和纯度较高,不需纯化,制备过程不产生任何三废,并且操作简便、成本较低、适宜进行规模化应用。(The invention relates to a method for preparing methanesulfonyl fluoride from methanesulfonyl chloride, belonging to the field of fine chemical engineering; the method comprises the following steps: adding a catalyst into methylsulfonyl chloride, controlling the temperature to be 50-100 ℃, continuously stirring, and introducing anhydrous hydrogen fluoride for reaction for 1-10 h to obtain methylsulfonyl fluoride; the method takes methanesulfonyl chloride as a raw material, and the methanesulfonyl chloride directly performs fluorination reaction with anhydrous hydrogen fluoride under the action of a catalyst to generate methanesulfonyl fluoride; the methanesulfonyl fluoride prepared by the method has high yield and purity, does not need purification, does not generate three wastes in the preparation process, has simple and convenient operation and low cost, and is suitable for large-scale application.)

1. A method for preparing methanesulfonyl fluoride from methanesulfonyl chloride is characterized in that: the method comprises the following steps:

adding a catalyst into methylsulfonyl chloride, controlling the temperature to be 50-100 ℃, continuously stirring, and introducing anhydrous hydrogen fluoride for reaction for 1-10 h to obtain methylsulfonyl fluoride;

wherein the catalyst is a catalyst for fluorination reaction;

the mass ratio of the catalyst to the methylsulfonyl chloride is (1-10): 1000.

2. The method for preparing methanesulfonyl fluoride according to claim 1, wherein: the catalyst is more than one of nickel fluoride, antimony pentafluoride, antimony trifluoride and potassium fluoride.

3. The method for preparing methanesulfonyl fluoride according to claim 1, wherein: the temperature is controlled at 60-80 ℃.

4. The method for preparing methanesulfonyl fluoride according to claim 1, wherein: the ratio of the amount of the anhydrous hydrogen fluoride to the amount of the methylsulfonyl chloride is (1.05-1.3): 1.

5. The method for preparing methanesulfonyl fluoride according to claim 1, wherein: the reaction time is 3-8 h.

6. The method for preparing methanesulfonyl fluoride according to claim 1, wherein: the catalyst is more than one of nickel fluoride, antimony pentafluoride, antimony trifluoride and potassium fluoride;

controlling the temperature to be 60-80 ℃;

the ratio of the amount of the anhydrous hydrogen fluoride to the amount of the methylsulfonyl chloride is (1.05-1.3): 1;

the reaction time is 3-8 h.

Technical Field

The invention relates to a method for preparing methanesulfonyl fluoride from methanesulfonyl chloride, belonging to the field of fine chemical engineering.

Background

Methanesulfonyl fluoride (CH)₃SO₂F) The important raw material for fine chemical synthesis is insoluble in water, soluble in hydrogen fluoride and can be used for preparing trifluoromethyl sulfonyl fluoride by electrochemical fluorination. The current main preparation method of the methanesulfonyl fluoride is as follows: the methanesulfonyl Chloride (CH) is prepared by fluorinating in potassium fluoride aqueous solution with methanesulfonyl chloride as raw material and potassium fluoride as reactant₃SO₂Cl) is substituted by fluorine, thus giving methanesulfonyl fluoride.

The preparation process has the following disadvantages:

(1) the yield is relatively low, and because the fluorination process is carried out in an aqueous solution, partial methanesulfonyl chloride can be hydrolyzed;

(2) the fluorination process is not a homogeneous reaction and can be divided into an aqueous phase and an organic phase, so that the reaction is incomplete;

(3) the purity of the methanesulfonyl fluoride prepared by the method is low, and the solution after reaction contains the aqueous solution of potassium chloride and potassium fluoride and needs to be purified continuously;

(4) the method can generate three wastes: because the potassium fluoride is excessive, a small amount of potassium fluoride and impurities generated by hydrolysis of methylsulfonyl chloride exist in the potassium chloride aqueous solution after the reaction, and cannot be directly recycled.

Disclosure of Invention

In view of the above, the present invention provides a method for preparing methanesulfonyl fluoride from methanesulfonyl chloride, wherein the method uses methanesulfonyl chloride as a raw material, and under the action of a catalyst, the methanesulfonyl chloride directly undergoes a fluorination reaction with anhydrous hydrogen fluoride to generate methanesulfonyl fluoride; the methanesulfonyl fluoride prepared by the method has high yield and purity, does not need purification, does not generate three wastes in the preparation process, has simple and convenient operation and low cost, and is suitable for large-scale application.

In order to achieve the purpose of the invention, the following technical scheme is provided.

A method for preparing methanesulfonyl fluoride from methanesulfonyl chloride, comprising the following steps:

adding a catalyst into methylsulfonyl chloride, controlling the temperature at 50-100 ℃, continuously stirring, and introducing anhydrous hydrogen fluoride for reaction for 1-10 h to obtain the methylsulfonyl fluoride.

Wherein the catalyst is a catalyst for fluorination reaction, and preferably is more than one of nickel fluoride, antimony pentafluoride, antimony trifluoride and potassium fluoride.

The mass ratio of the catalyst to the methylsulfonyl chloride is (1-10): 1000.

Preferably, the temperature is controlled to 60 ℃ to 80 ℃.

Preferably, the ratio of the amount of the anhydrous hydrogen fluoride to the amount of the methylsulfonyl chloride is (1.05-1.3): 1.

Preferably, the reaction time is 3 to 8 hours.

Has the advantages that:

(1) the invention provides a method for preparing methanesulfonyl fluoride from methanesulfonyl chloride, which takes methanesulfonyl chloride as a raw material, and under the action of a catalyst, the methanesulfonyl chloride directly performs fluorination reaction with anhydrous hydrogen fluoride to obtain methanesulfonyl fluoride, and a byproduct is hydrogen chloride; the method is carried out in an anhydrous environment, and the raw material methylsulfonyl chloride cannot be hydrolyzed, so that hydrolysis impurities are not generated; in addition, the by-product is hydrogen chloride, which is easily separated from the product methanesulfonyl fluoride; further, the yield of the methanesulfonyl fluoride prepared by the method provided by the invention is high and can reach more than 98%; the purity is high and can reach more than 98 percent.

(2) The invention adds a small amount of catalyst, which can reduce the activation energy of the reaction, reduce the reaction temperature and reduce the reaction time.

(3) The method of the invention prepares the residual anhydrous hydrogen fluoride with a small amount of the methanesulfonyl fluoride, and the residual anhydrous hydrogen fluoride can be directly used as the raw material for the electrolysis of the methanesulfonyl fluoride without a purification process.

(4) The byproduct, namely hydrogen chloride, generated by the method can be used as a raw material for preparing high-purity electronic gas hydrogen chloride; therefore, the method does not generate three wastes in the preparation process, is simple and convenient to operate, has low cost and is suitable for large-scale application.

Detailed Description

The invention will be described in more detail with reference to specific examples, which should not be construed as limiting the scope of the invention.

In the following examples:

gas chromatography testing was performed using Shimadzu GC-2014.

Example 1

Adding 1.1kg of methylsulfonyl chloride into a reaction kettle, adding 6g of antimony pentafluoride, heating to 80 ℃, introducing 202g of anhydrous hydrogen fluoride gas under continuous stirring to perform fluorination reaction, and reacting for 8 hours to obtain a product, wherein the mass of the product is 930g, and the yield is 98.8%; the product was found to be methanesulfonyl fluoride by gas chromatography with a purity of 99.1%.

Example 2

Adding 1.1kg of methylsulfonyl chloride into a reaction kettle, adding 10g of antimony trifluoride, heating to 50 ℃, introducing 249g of anhydrous hydrogen fluoride gas under continuous stirring to perform fluorination reaction, and reacting for 1h to obtain a product, wherein the mass of the product is 935g, and the yield is 99.3%; the product was found to be methanesulfonyl fluoride by gas chromatography with a purity of 98.7%.

Example 3

Adding 1.1kg of methylsulfonyl chloride into a reaction kettle, adding 3g of potassium fluoride, heating to 100 ℃, introducing 210g of anhydrous hydrogen fluoride gas under continuous stirring to perform fluorination reaction, and reacting for 3 hours to obtain a product, wherein the mass of the product is 925g, and the yield is 98.3%; the product was found to be methanesulfonyl fluoride by gas chromatography with a purity of 98.5%.

Example 4

Adding 1.1kg of methylsulfonyl chloride into a reaction kettle, adding 8g of nickel fluoride, heating to 50 ℃, introducing 220g of anhydrous hydrogen fluoride gas under continuous stirring to perform fluorination reaction, and reacting for 10 hours to obtain a product, wherein the mass of the product is 927g, and the yield is 98.5%; the product was found to be methanesulfonyl fluoride by gas chromatography with a purity of 99.2%.

The present invention includes, but is not limited to, the above embodiments, and any equivalent substitutions or partial modifications made under the principle of the spirit of the present invention should be considered as being within the scope of the present invention.