阅读说明：本技术 一种数据中心液冷氟化液的合成方法 (Synthetic method of liquid-cooled fluorinated liquid of data center ) 是由 张仲先 于 2021-02-05 设计创作，主要内容包括：本发明提供一种数据中心液冷氟化液的合成方法,包括以下步骤,S1：在氮气氛围中,将甲氧基-九氟代丁烷与有机溶剂充分混合后置入带冷凝器的反应器中,所述有机溶剂的加入量为甲氧基-九氟代丁烷的重量的2-4倍,随后向反应器中依次加入氟化锂、液态氟化氢,然后升温至34-55℃,反应7-11小时,本发明的制备方法对环境污染小,总收率提高至72.9％,工业化生产前景广阔。(The invention provides a method for synthesizing liquid-cooled fluorinated liquid of a data center, which comprises the following steps of S1: in the nitrogen atmosphere, fully mixing methoxy-nonafluorobutane and an organic solvent, putting the mixture into a reactor with a condenser, wherein the addition amount of the organic solvent is 2-4 times of the weight of the methoxy-nonafluorobutane, sequentially adding lithium fluoride and liquid hydrogen fluoride into the reactor, heating to 34-55 ℃, and reacting for 7-11 hours.)

1. A synthetic method of liquid-cooled fluorinated liquid of a data center is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

s1: fully mixing methoxy-nonafluorobutane with an organic solvent in a nitrogen atmosphere, putting the mixture into a reactor with a condenser, wherein the addition amount of the organic solvent is 2-4 times of the weight of the methoxy-nonafluorobutane, sequentially adding lithium fluoride and liquid hydrogen fluoride into the reactor, heating to 34-55 ℃, and reacting for 7-11 hours;

s2: reducing the temperature of the reaction system to 23-25 ℃, using nitrogen to perform reduced pressure replacement to completely remove residual hydrogen fluoride gas, filtering the reaction solution remained in the reactor in the nitrogen atmosphere, and removing insoluble substances to obtain a filtrate;

s3: heating potassium fluoride to 95-105 ℃, mixing and stirring for 1-5 hours, and distilling the reaction liquid under normal pressure to recover methanol and toluene; then under the protection of nitrogen, adding the filtrate prepared by S2 and a catalyst, heating to 120-200 ℃ for fluorination reaction, wherein the reaction time is 4-10 hours;

s4: concentrating the filtrate in S3 to 1-2 times of the mass of the raw material methoxy-nonafluorobutane in S1 at 40-60 ℃ by using a high vacuum reduced pressure desolventizing method to obtain a concentrated solution;

s5: cooling the concentrated solution to 20-25 ℃, adding a weak polar solvent into the concentrated solution for low-temperature recrystallization, wherein the stirring speed is 500-1000r/min, the weak polar solvent is an organic solvent with the polarity less than or equal to 3.4, the temperature of the weak polar solvent is 10-25 ℃, and the volume ratio of the concentrated solution to the weak polar solvent is 1: 3-10, filtering and drying under reduced pressure at 40 ℃ to obtain pure methoxy-nonafluorobutane;

s5: the preparation is finished.

2. The method for synthesizing a liquid-cooled fluorinated liquid for a data center according to claim 1, wherein the method comprises the following steps: the purity of the methoxy-nonafluorobutane is more than 99%, the purity of the lithium fluoride is more than 99%, and the purity of the hydrogen fluoride is more than 99%.

3. The method for synthesizing a liquid-cooled fluorinated liquid for a data center according to claim 1, wherein the method comprises the following steps: the weak polar solvent in the S5 is one or a mixture of several of dichloromethane, carbon tetrachloride, toluene and n-hexane.

4. The method for synthesizing a liquid-cooled fluorinated liquid for a data center according to claim 1, wherein the method comprises the following steps: the bis-chlorosulfonyl imide is prepared by mixing sulfamic acid, thionyl chloride and chlorosulfonic acid at the reaction temperature of 120-150 ℃ for 10-30 hours.

5. The method for synthesizing a liquid-cooled fluorinated liquid for a data center according to claim 1, wherein the method comprises the following steps: the catalyst in the step S3 is KI, NaI or I2.

6. The method for synthesizing a liquid-cooled fluorinated liquid for a data center according to claim 1, wherein the method comprises the following steps: the catalyst in the step S3 is a combination of quaternary phosphonium salt and polyether, and the mass ratio of the quaternary phosphonium salt to the polyether is 2.8-3.2: 2.

7. The method for synthesizing a liquid-cooled fluorinated liquid for a data center according to claim 6, wherein the method comprises the following steps: the quaternary phosphonium salt is any one of tetraphenyl phosphonium bromide, tetraphenyl phosphonium chloride, triphenyl ethyl phosphonium bromide, triphenyl butyl phosphonium bromide and triphenyl benzyl phosphonium bromide; the polyether is any one of 18-crown-6, diphenyl-18-crown-6, dicyclohexyl-18-crown-6, 15-crown-5 and polyethylene glycol 6000.

[ technical field ]

The invention relates to the technical field of liquid-cooled fluorinated liquid synthesis preparation methods, in particular to a synthesis method of a liquid-cooled fluorinated liquid of a data center with a remarkable application effect.

[ background art ]

Chinese patent application No. 201280010507.4 discloses a method for producing a fluorine-containing sulfonimide salt by reacting a fluorine-containing sulfonimide ammonium salt such as N, N-bis (fluorosulfonyl) imide ammonium salt with an alkali metal hydroxide such as lithium hydroxide, potassium hydroxide or sodium hydroxide at a low temperature of about 40 ℃ under reduced pressure to obtain a fluorine-containing sulfonimide alkali metal salt such as N, N-bis (fluorosulfonyl) imide lithium salt, N-bis (fluorosulfonyl lithium) imide potassium salt or N, N-bis (fluorosulfonyl phthalidyl) imide sodium salt. However, the above-mentioned production method has a drawback that raw materials are not easily available, a large amount of heat is generated during the reaction, and the product is likely to be decomposed by heat, and thus is not suitable for industrial production.

The preparation method of lithium bis (fluorosulfonyl) imide reported in chinese patent CN103524387A comprises the steps of reacting thionyl chloride, sulfamic acid and chlorosulfonic acid in a reaction vessel without separation of a product of the bis (chlorosulfonyl) imide compound (HN [ SOzCl ] z), directly adding thionyl chloride and anhydrous lithium salt to react to obtain lithium bis (chlorosulfonyl) imide, removing the thionyl chloride solvent, adding an organic solvent and a small amount of triethylamine, performing fluorination reaction by using anhydrous zinc fluoride, filtering, and evaporating or recrystallizing the filtrate and drying under reduced pressure to obtain lithium bis (fluorosulfonyl) imide. The reaction steps are complicated, the types of reagents are more, other impurities are introduced with higher probability, and zinc chloride formed by the reaction of the zinc fluoride and the zinc fluoride serving as the fluorinating agent of the reaction is easy to remain in the solvent, so that the finally obtained product is impure.

A preparation method of lithium bis (fluorosulfonyl) imide reported in China CN103664712A comprises the steps of mixing and stirring concentrated sulfuric acid, KN (SO2F)2 and silicon dioxide, introducing nitrogen, distilling at normal pressure to obtain crude HFSI, rectifying in a distillation tower to obtain a pure product HFSI, preparing lithium carbonate and deionized water into a suspension, slowly dropwise adding an HFSI aqueous solution, stopping reaction at about 50 ℃ and pH 6-6.3, spray-drying reaction liquid to obtain solid powder, and vacuum-drying at about 200 ℃ and 1-6Pa to obtain the pure product LiFSI. HFSI reacts with lithium carbonate in water environment, the reaction is exothermic, the product is easy to decompose in water solution, and the exsolution and drying become difficult due to water entrainment.

[ summary of the invention ]

In order to overcome the problems in the prior art, the invention provides a synthesis method of liquid-cooled fluorinated liquid of a data center, which has a remarkable application effect.

The invention provides a synthetic method of liquid-cooled fluorinated liquid of a data center, which solves the technical problem and comprises the following steps,

s1: fully mixing methoxy-nonafluorobutane with an organic solvent in a nitrogen atmosphere, putting the mixture into a reactor with a condenser, wherein the addition amount of the organic solvent is 2-4 times of the weight of the methoxy-nonafluorobutane, sequentially adding lithium fluoride and liquid hydrogen fluoride into the reactor, heating to 34-55 ℃, and reacting for 7-11 hours;

s2: reducing the temperature of the reaction system to 23-25 ℃, using nitrogen to perform reduced pressure replacement to completely remove residual hydrogen fluoride gas, filtering the reaction solution remained in the reactor in the nitrogen atmosphere, and removing insoluble substances to obtain a filtrate;

s3: heating potassium fluoride to 95-105 ℃, mixing and stirring for 1-5 hours, and distilling the reaction liquid under normal pressure to recover methanol and toluene; then under the protection of nitrogen, adding the filtrate prepared by S2 and a catalyst, heating to 120-200 ℃ for fluorination reaction, wherein the reaction time is 4-10 hours;

s4: concentrating the filtrate in S3 to 1-2 times of the mass of the raw material methoxy-nonafluorobutane in S1 at 40-60 ℃ by using a high vacuum reduced pressure desolventizing method to obtain a concentrated solution;

s5: cooling the concentrated solution to 20-25 ℃, adding a weak polar solvent into the concentrated solution for low-temperature recrystallization, wherein the stirring speed is 500-1000r/min, the weak polar solvent is an organic solvent with the polarity less than or equal to 3.4, the temperature of the weak polar solvent is 10-25 ℃, and the volume ratio of the concentrated solution to the weak polar solvent is 1: 3-10, filtering and drying under reduced pressure at 40 ℃ to obtain pure methoxy-nonafluorobutane;

s5: the preparation is finished.

Preferably, the methoxy-nonafluorobutane has a purity of greater than 99%, the lithium fluoride has a purity of greater than 99%, and the hydrogen fluoride has a purity of greater than 99%.

Preferably, the weak polar solvent in S5 is one or a mixture of several of dichloromethane, carbon tetrachloride, toluene and n-hexane.

Preferably, the dichlorosulfonimide is prepared by mixing sulfamic acid, thionyl chloride and chlorosulfonic acid, the reaction temperature is 120-150 ℃, and the reaction time is 10-30 hours.

Preferably, the catalyst in step S3 is KI, NaI or I2.

Preferably, the catalyst in the step S3 is a combination of quaternary phosphonium salt and polyether, and the mass ratio of the quaternary phosphonium salt to the polyether is 2.8-3.2: 2.

Preferably, the quaternary phosphonium salt is any one of tetraphenyl phosphonium bromide, tetraphenyl phosphonium chloride, triphenyl ethyl phosphonium bromide, triphenyl butyl phosphonium bromide and triphenyl benzyl phosphonium bromide; the polyether is any one of 18-crown-6, diphenyl-18-crown-6, dicyclohexyl-18-crown-6, 15-crown-5 and polyethylene glycol 6000.

Compared with the prior art, in the practical application process of the synthesis method of the liquid-cooled fluoridation liquid of the data center, compared with the prior art, the yield and selectivity of the key steps of fluoridation and hydrolysis are improved, the product yield is greatly improved, the post-treatment of each step of reaction is simple, the nitrogen is a byproduct of the hydrolysis, the environmental pollution is small, the total yield is improved to 72.9%, and the industrial production prospect is wide.

[ description of the drawings ]

FIG. 1 is a schematic flow chart of a method for synthesizing a liquid-cooled fluorinated liquid in a data center according to the present invention.

[ detailed description of the invention ]

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a method 1 for synthesizing a liquid-cooled fluorinated liquid in a data center according to the present invention includes the following steps,

s1: fully mixing methoxy-nonafluorobutane with an organic solvent in a nitrogen atmosphere, putting the mixture into a reactor with a condenser, wherein the addition amount of the organic solvent is 2-4 times of the weight of the methoxy-nonafluorobutane, sequentially adding lithium fluoride and liquid hydrogen fluoride into the reactor, heating to 34-55 ℃, and reacting for 7-11 hours;

s2: reducing the temperature of the reaction system to 23-25 ℃, using nitrogen to perform reduced pressure replacement to completely remove residual hydrogen fluoride gas, filtering the reaction solution remained in the reactor in the nitrogen atmosphere, and removing insoluble substances to obtain a filtrate;

s3: heating potassium fluoride to 95-105 ℃, mixing and stirring for 1-5 hours, and distilling the reaction liquid under normal pressure to recover methanol and toluene; then under the protection of nitrogen, adding the filtrate prepared by S2 and a catalyst, heating to 120-200 ℃ for fluorination reaction, wherein the reaction time is 4-10 hours;

s4: concentrating the filtrate in S3 to 1-2 times of the mass of the raw material methoxy-nonafluorobutane in S1 at 40-60 ℃ by using a high vacuum reduced pressure desolventizing method to obtain a concentrated solution;

s5: cooling the concentrated solution to 20-25 ℃, adding a weak polar solvent into the concentrated solution for low-temperature recrystallization, wherein the stirring speed is 500-1000r/min, the weak polar solvent is an organic solvent with the polarity less than or equal to 3.4, the temperature of the weak polar solvent is 10-25 ℃, and the volume ratio of the concentrated solution to the weak polar solvent is 1: 3-10, filtering and drying under reduced pressure at 40 ℃ to obtain pure methoxy-nonafluorobutane;

s5: the preparation is finished.

By adopting the preparation method, in the actual application process, compared with the prior art, the yield and selectivity of the key steps of fluorination reaction and hydrolysis reaction are improved, the product yield is greatly improved, the post-treatment of each step of reaction is simple, the hydrolysis reaction produces nitrogen as a byproduct, the environmental pollution is small, the total yield is improved to 72.9 percent, and the industrial production prospect is wide.

Preferably, the methoxy-nonafluorobutane has a purity of greater than 99%, the lithium fluoride has a purity of greater than 99%, and the hydrogen fluoride has a purity of greater than 99%.

Preferably, the weak polar solvent in S5 is one or a mixture of several of dichloromethane, carbon tetrachloride, toluene and n-hexane.

Preferably, the dichlorosulfonimide is prepared by mixing sulfamic acid, thionyl chloride and chlorosulfonic acid, the reaction temperature is 120-150 ℃, and the reaction time is 10-30 hours.

Preferably, the catalyst in step S3 is KI, NaI or I2.

Preferably, the catalyst in the step S3 is a combination of quaternary phosphonium salt and polyether, and the mass ratio of the quaternary phosphonium salt to the polyether is 2.8-3.2: 2.

Preferably, the quaternary phosphonium salt is any one of tetraphenyl phosphonium bromide, tetraphenyl phosphonium chloride, triphenyl ethyl phosphonium bromide, triphenyl butyl phosphonium bromide and triphenyl benzyl phosphonium bromide; the polyether is any one of 18-crown-6, diphenyl-18-crown-6, dicyclohexyl-18-crown-6, 15-crown-5 and polyethylene glycol 6000.

Compared with the prior art, the synthesis method 1 of the liquid-cooled fluorinated liquid of the data center has the following advantages,

1. the method takes methoxy-nonafluorobutane as a starting material to synthesize the 3,4,5, 6-tetrafluorophthalic acid for the first time, and compared with the prior art, the synthesis method improves the yield and selectivity of key steps of fluorination reaction and hydrolysis reaction, and greatly improves the product yield;

2. the post-treatment of each step of reaction is simple, and the hydrolysis reaction produces nitrogen as a byproduct, so that the method has little pollution to the environment;

3. the total yield of the invention is improved to 72.9 percent, and the industrial production prospect is wide.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.