CN111892616A - Synthesis method of trimethylene borate - Google Patents

Synthesis method of trimethylene borate Download PDF

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Publication number
CN111892616A
CN111892616A CN201910367804.8A CN201910367804A CN111892616A CN 111892616 A CN111892616 A CN 111892616A CN 201910367804 A CN201910367804 A CN 201910367804A CN 111892616 A CN111892616 A CN 111892616A
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trimethylene borate
borate
boric acid
trimethylene
product
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Inventor
张民
闫彩桥
葛建民
王军
武利斌
侯荣雪
郝俊
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SHIJIAZHUANG SHENGTAI CHEMICAL CO Ltd
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SHIJIAZHUANG SHENGTAI CHEMICAL CO Ltd
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F5/00Compounds containing elements of Groups 3 or 13 of the Periodic Table
    • C07F5/02Boron compounds
    • C07F5/04Esters of boric acids

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  • Organic Chemistry (AREA)

Abstract

A synthesis method of trimethylene borate belongs to the technical field of battery electrolyte additives, and comprises the steps of taking 1, 3-propylene glycol and boric acid as raw materials, adding 1, 3-propylene glycol, boric acid and hydrocarbons under the condition of argon, heating to a reflux temperature, stirring until water is brought out, cooling, drying, removing a solvent by reduced pressure distillation at 60 ℃ to obtain a crude trimethylene borate product, and rectifying to obtain a pure trimethylene borate product. The raw materials used in the invention are cheap and easily available, the synthesis method is simple and easy to operate, the reaction conditions are mild and stable, the three wastes are less, the energy consumption is low, and the product yield is high and can reach more than 94%.

Description

Synthesis method of trimethylene borate
Technical Field
The invention belongs to the technical field of battery electrolyte additives, relates to a method for synthesizing trimethylene borate by using trimethylene borate as a battery electrolyte additive, and particularly relates to a method for synthesizing trimethylene borate.
Background
With the wide application of 4G mobile phones, tablet computers, electric vehicles and other devices, the battery is required to support longer-time operation, and higher requirements are provided for the endurance of the lithium ion battery. Therefore, increasing the specific energy density of lithium ion batteries has become one of the problems to be solved urgently. As is known from research, increasing the operating voltage of a lithium ion battery is considered to be one of the most effective methods for increasing the energy density of the lithium ion battery.
Boron-containing compounds are often applied to lithium ion batteries of different anode materials as additives, and in the battery cycle process, a protective film is formed on the surface of an anode by a plurality of boron-containing compounds to stabilize the interface between an electrode and electrolyte, so that the battery performance is improved. The trimethylene borate has a remarkable effect, and can meet the performance requirements of the lithium ion battery under high voltage and high and low temperature conditions. However, in the existing synthesis technology of trimethylene borate, the problems of complex process, difficulty in realizing industrial production, high cost, low product yield and the like exist in the synthesis process, so that the research on the synthesis method of trimethylene borate has great practical significance.
Disclosure of Invention
The invention aims to provide a method for synthesizing trimethylene borate, which is simple, cheap and easily available in raw materials, mild and stable in reaction conditions, and high in yield and purity.
The technical scheme adopted by the invention for realizing the purpose is as follows:
the synthesis method of the trimethylene borate comprises the steps of adopting 1, 3-propylene glycol and boric acid as raw materials, adding the 1, 3-propylene glycol, the boric acid and hydrocarbons under the condition of argon, heating to the reflux temperature, stirring until water is brought out, cooling, drying, removing the solvent by vacuum distillation at 60 ℃ to obtain a crude trimethylene borate product, and rectifying to obtain a pure trimethylene borate product.
The molar ratio of boric acid to 1, 3-propanediol is 2: (3-8).
The hydrocarbon is selected from hydrocarbons which form azeotropes with water.
The hydrocarbon is selected from benzene, toluene or dichlorotoluene.
After cooling, the mixture was dried over anhydrous sodium sulfate.
The crude product of the trimethylene borate is rectified under reduced pressure at the temperature of 100-110 ℃ to obtain the pure product of the trimethylene borate.
The invention has the beneficial effects that:
the raw materials used in the invention are cheap and easily available, the synthesis method is simple and easy to operate, the reaction conditions are mild and stable, the three wastes are less, the energy consumption is low, and the product yield is high and can reach more than 94%.
Drawings
FIG. 1 is a 1H map of the present invention for the synthesis of trimethylene borate.
FIG. 2 is a 13C map of the present invention for the synthesis of trimethylene borate.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
1000mL of argon gas was introduced into a four-necked flask to displace the gas therein, and 36.00g of 1, 3-propanediol, 15.46g of boric acid and 250mL of benzene were added thereto, and the mixture was heated to reflux temperature and stirred until water was taken out. After cooling, 20g of anhydrous sodium sulfate is added for drying, and the solvent is removed by reduced pressure distillation at 60 ℃ to obtain a crude product of the trimethylene borate. The crude trimethylene borate was subjected to rectification under reduced pressure at 100 ℃ and 110 ℃ to give 28.65g of colorless liquid trimethylene borate (yield 94%).
The colorless liquid obtained above was measured to have a density of 1.153g/mL and a boiling point of 146 deg.C (normal pressure), and its purity was measured to be 99.8%.
Example 2
1000mL of argon was introduced into a four-necked flask to displace the inside gas, and then 23g of 1, 3-propanediol, 12.4g of boric acid and 250mL of toluene were added thereto, and the mixture was heated to reflux temperature and stirred until water was taken out. After cooling, 20g of anhydrous sodium sulfate is added for drying, and the solvent is removed by reduced pressure distillation at 60 ℃ to obtain a crude product of the trimethylene borate. The crude trimethylene borate was subjected to rectification under reduced pressure at 100 ℃ and 110 ℃ to give 23.22g of a colorless liquid trimethylene borate (yield 95.3%).
The colorless liquid obtained above was measured to have a density of 1.154g/mL and a boiling point of 145 deg.C (normal pressure), and its purity was determined to be 99.82%.
Example 3
First, 1000mL of argon was introduced into a four-necked flask to displace the inside gas, and then 30.4g of 1, 3-propanediol, 12.4g of boric acid and 250mL of dichlorotoluene were added thereto, and the mixture was heated to reflux temperature and stirred until water was taken out. After cooling, 20g of anhydrous sodium sulfate is added for drying, and the solvent is removed by reduced pressure distillation at 60 ℃ to obtain a crude product of the trimethylene borate. The crude trimethylene borate was subjected to rectification under reduced pressure at 100 ℃ and 110 ℃ to give 23.4g of a colorless liquid trimethylene borate (yield 96.1%).
The colorless liquid obtained above was measured to have a density of 1.151g/mL and a boiling point of 147 deg.C (normal pressure), and its purity was found to be 99.76%.
Example 4
1000mL of argon was introduced into a four-necked flask to displace the inside gas, and then 38g of 1, 3-propanediol, 12.4g of boric acid and 250mL of toluene were added thereto, and the mixture was heated to reflux temperature and stirred until water was taken out. After cooling, 20g of anhydrous sodium sulfate is added for drying, and the solvent is removed by reduced pressure distillation at 60 ℃ to obtain a crude product of the trimethylene borate. The crude trimethylene borate thus obtained was subjected to rectification under reduced pressure at 100 ℃ and 110 ℃ to give 23.07g of a colorless liquid trimethylene borate (yield 94.7%).
The colorless liquid obtained above was measured to have a density of 1.156g/mL and a boiling point of 148 ℃ at normal pressure, and the purity thereof was found to be 99.83%.
Example 5
First, 1000mL of argon was introduced into a four-necked flask to displace the inside gas, and then, 45.6g of 1, 3-propanediol, 12.4g of boric acid and 300mL of dichlorotoluene were added thereto, and the mixture was heated to reflux temperature and stirred until water was taken out. After cooling, 25g of anhydrous sodium sulfate is added for drying, and the solvent is removed by reduced pressure distillation at 60 ℃ to obtain the crude product of the trimethylene borate. The crude trimethylene borate was subjected to rectification under reduced pressure at 100 ℃ and 110 ℃ to obtain 23.68g of colorless liquid trimethylene borate (yield 97.2%).
The colorless liquid obtained above was measured to have a density of 1.155g/mL and a boiling point of 146 deg.C (normal pressure), and its purity was determined to be 99.81%.
Example 6
First, 1000mL of argon was introduced into a four-necked flask to displace the inside gas, and then 53.2g of 1, 3-propanediol, 12.4g of boric acid and 330mL of benzene were added thereto, and the mixture was heated to reflux temperature and stirred until water was taken out. After cooling, 25g of anhydrous sodium sulfate is added for drying, and the solvent is removed by reduced pressure distillation at 60 ℃ to obtain the crude product of the trimethylene borate. The crude trimethylene borate was subjected to rectification under reduced pressure at 100 ℃ and 110 ℃ to give 23.58g of a colorless liquid trimethylene borate (yield 96.8%).
The colorless liquid obtained above was measured to have a density of 1.154g/mL and a boiling point of 147 deg.C (normal pressure), and its purity was determined to be 99.78%.
Example 7
1000mL of argon was introduced into a four-necked flask to displace the inside gas, and then 60.8g of 1, 3-propanediol, 12.4g of boric acid and 350mL of toluene were added thereto, and the mixture was heated to reflux temperature and stirred until water was taken out. After cooling, 25g of anhydrous sodium sulfate is added for drying, and the solvent is removed by reduced pressure distillation at 60 ℃ to obtain the crude product of the trimethylene borate. The crude trimethylene borate thus obtained was subjected to rectification under reduced pressure at 100 ℃ and 110 ℃ to give 23.24g of a colorless liquid trimethylene borate (yield 95.4%).
The colorless liquid obtained above was measured to have a density of 1.157g/mL and a boiling point of 146 deg.C (normal pressure), and its purity was 99.73%.
The product is detected by a gas phase method, and is characterized by 1H-NMR and 13C-NMR to be identified as the trimethylene borate, and the reference is made to figure 1 and figure 2.

Claims (6)

1. The synthesis method of the trimethylene borate adopts 1, 3-propylene glycol and boric acid as raw materials, and is characterized in that under the condition of argon, 1, 3-propylene glycol, boric acid and hydrocarbons are added, the temperature is raised to the reflux temperature, the stirring is carried out until water is removed, the cooling and drying are carried out, the solvent is removed by vacuum distillation at the temperature of 60 ℃ to obtain a crude trimethylene borate product, and the crude trimethylene borate product is obtained by rectification.
2. The method of synthesizing trimethylene borate of claim 1, wherein the molar ratio of boric acid to 1, 3-propanediol is 2: (3-8).
3. The method of synthesizing trimethylene borate of claim 1, wherein the hydrocarbon is selected from the group consisting of hydrocarbons that form azeotropes with water.
4. The method of claim 3, wherein the hydrocarbon is selected from the group consisting of benzene, toluene and dichlorotoluene.
5. The method of synthesizing trimethylene borate according to claim 1, wherein the cooled product is dried over anhydrous sodium sulfate.
6. The method as claimed in claim 1, wherein the crude trimethylene borate is further rectified under reduced pressure at 100-110 ℃.
CN201910367804.8A 2019-05-05 2019-05-05 Synthesis method of trimethylene borate Withdrawn CN111892616A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115232103A (en) * 2022-08-03 2022-10-25 四平市精细化学品有限公司 Preparation method of cyclic sulfate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120289733A1 (en) * 2011-05-11 2012-11-15 Anderson Development Company Novel borate derivatives and their applications

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120289733A1 (en) * 2011-05-11 2012-11-15 Anderson Development Company Novel borate derivatives and their applications

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115232103A (en) * 2022-08-03 2022-10-25 四平市精细化学品有限公司 Preparation method of cyclic sulfate
CN115232103B (en) * 2022-08-03 2023-09-29 四平市精细化学品有限公司 Preparation method of cyclic sulfate

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