Unlock instant, AI-driven research and patent intelligence for your innovation.

Absolute ethyl alcohol purification process

An anhydrous ethanol and process technology, applied in the field of purification process of anhydrous ethanol, can solve problems such as high heat consumption of rectification, lack of competitiveness, rising product cost, etc., and achieve the goal of reducing extraction energy consumption costs and improving market competitiveness Effect

Inactive Publication Date: 2017-07-07
SUZHOU BOYANG CHEM
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method completely removes metals, but rectification consumes a lot of heat, which leads to an increase in product costs and lacks competitiveness in the market

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] ①Molecular sieve

[0025] Put 2000L of crude absolute ethanol (containing about 0.2wt% of water) into a 3A molecular sieve dryer and dry until the water content is below 0.05wt%.

[0026] ②Precision filtration

[0027] The liquid obtained in step ① is filtered through a precision filter with a 0.2 micron ceramic filter element, and further dehydrated and dried.

[0028] ③ Desalination

[0029] Pour the liquid obtained in step ② into a hydrophobic PVDF-PTFE membrane filter for desalination to obtain a liquid.

[0030] ④Quality inspection

[0031] The liquid obtained in step ③ is tested for main components and Fe and Ca metal contents.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of chemical preparations, and relates to an absolute ethyl alcohol purification process. The process comprises the steps of sieving through a molecular sieve, precision filtering, desalting and quality control filling. By adopting the process, absolute ethyl alcohol with ultralow metal impurity content can be obtained, and the use demand in the precision electronics industry is met; compared with a rectification process, the extraction energy consumption cost is lowered greatly, and greater market competitiveness is achieved.

Description

technical field [0001] The invention relates to the technical field of chemical preparations, in particular to a purification process for saving energy and producing absolute ethanol suitable for the precision electronics industry. Background technique [0002] Absolute ethanol refers to ethanol aqueous solution with higher purity, and the purity is generally above 99.5% before it is called absolute ethanol. Absolute ethanol is often used as an organic solvent, and it is used as a cleaning solution in the production and processing of optics, semiconductors, semiconductor packaging and testing, LED, TFT-LCD, TP, etc. In the precision electronics industry, the purity of the solvent will have more stringent requirements, because if the content of metal impurities in the solvent is too high, it will cause changes in resistance after use, and even short-circuit problems. [0003] In order to make absolute ethanol suitable for the precision electronics industry, the usual method ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/08C07C29/76C07C29/78
Inventor 王国洪王润杰钱海书
Owner SUZHOU BOYANG CHEM