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Method for reducing free acid of electronic propane sultone

A technology of propane sultone and free acid, applied in organic chemistry and other fields, can solve problems such as adverse effects on the quality of lithium batteries, and achieve the effect of low cost and simple operation method

Active Publication Date: 2020-11-20
常熟聚和化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above technologies all reduce the moisture and acid value of 1,3-propane sultone to a certain extent, the acid value is still high (greater than 10ppm), which will still cause adverse effects on the quality of lithium batteries

Method used

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  • Method for reducing free acid of electronic propane sultone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for reducing electron propane sultone free acid, comprising the steps of:

[0034] Mix 100 parts of 1,3-propane sultone with 5 parts of neutral powder activated carbon and 5 parts of basic granular activated carbon, then stir at 80°C, the stirring speed is 100rpm / min, the stirring time is 60min, filter , the filtration speed is 10 parts / min, and the filtrate is collected. Wherein, the pore size of the powdered activated carbon is 100-um, and the specific surface area is 400-500g / m 2 ; The particle size of the granular activated carbon is 3mm.

[0035] The processing steps of alkaline granular activated carbon in this implementation are as follows: S1 adopts 3% NaOH solution to regenerate anion resin 201×7;

[0036] S2 Mix the regenerated anion resin with water, stir for 6 hours, the system temperature is 50°C during stirring, and filter;

[0037] S3 uses the filtrate obtained in step S2 to mix with granular activated carbon to adjust the pH value of the solu...

Embodiment 2

[0040] A method for reducing electron propane sultone free acid, comprising the steps of:

[0041] Mix 100 parts of 1,3-propane sultone with 5 parts of neutral powder activated carbon and 5 parts of basic granular activated carbon, then stir at 80°C, the stirring speed is 20rpm / min, the stirring time is 60min, filter , the filtration speed is 10 parts / min, and the filtrate is collected. Wherein, the pore size of the powdered activated carbon is 100-um, and the specific surface area is 400-500g / m 2 ; The particle size of the granular activated carbon is 3mm.

[0042] The processing steps of alkaline granular activated carbon in this implementation are as follows: S1 adopts 3% NaOH solution to regenerate anion resin 201×7;

[0043] S2 Mix the regenerated anion resin with water, stir for 6 hours, the system temperature is 50°C during stirring, and filter;

[0044] S3 uses the filtrate obtained in step S2 to mix with granular activated carbon to adjust the pH value of the solut...

Embodiment 3

[0047] A method for reducing electron propane sultone free acid, comprising the steps of:

[0048] Mix 100 parts of 1,3-propane sultone with 5 parts of neutral powder activated carbon and 5 parts of basic granular activated carbon, then stir at 80°C, the stirring speed is 100rpm / min, the stirring time is 60min, filter , the filtration speed is 20 parts / min, and the filtrate is collected. Wherein, the pore size of the powdered activated carbon is 100-um, and the specific surface area is 400-500g / m 2 ; The particle size of the granular activated carbon is 3mm.

[0049]The processing steps of alkaline granular activated carbon in this implementation are as follows: S1 adopts 3% NaOH solution to regenerate anion resin 201×7;

[0050] S2 Mix the regenerated anion resin with water, stir for 6 hours, the system temperature is 50°C during stirring, and filter;

[0051] S3 uses the filtrate obtained in step S2 to mix with granular activated carbon to adjust the pH value of the solut...

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Abstract

The invention belongs to the technical field of propane sultone, and particularly relates to a method for reducing free acid of electronic 1,3-propane sultone. The method for reducing the free acid ofelectronic propane sultone comprises the following steps: mixing 1,3-propane sultone with powdered activated carbon and granular activated carbon, stirring at 30-80 DEG C, filtering, and collecting filtrate. The provided method can reduce the content of free acid and water in propane sultone to below 10ppmm, and is simple in operation method, low in cost and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of propane sultone, in particular to a method for reducing electron propane sultone free acid. Background technique [0002] 1,3-propane sultone (PS), also known as 1,3-propane sultone, is an important intermediate in organic synthesis. Due to its chemical structure, it is compatible with alcohols, phenols, thiols, amines, etc Organic matter has strong reactivity. 1,3-Propane sultone is a white crystal at room temperature with a melting point of 30-33°C. It is widely used in surface treatment, electronic plating, photosensitive materials, leather, ink, medicine and lithium-ion batteries and other fields. [0003] Electronic grade 1,3-propane sultone for lithium batteries has strict requirements, its content ≥ 99.90%, color number ≤ 30 (platinum-cobalt colorimetric), moisture ≤ 100ppm, acid value ≤ 100ppm, turbidity ≤ 10NTU, sodium ion ≤ 20ppm, any item needs to meet the standard, and only 1,3-propane sult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D327/04
CPCC07D327/04
Inventor 徐晓峰陈娓曹广宇
Owner 常熟聚和化学有限公司