Preparation method of ultrapure isopropanol

A technology of ultra-pure isopropanol and isopropanol, which is applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of difficult cost reduction, high content of impurity metal ions, and difficult post-processing, etc. Achieve the effects of reducing clogging, low content of impurity metal ions, and simple operation

Active Publication Date: 2014-03-05
SHANGHAI CHEM REAGENT RES INST
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to provide a preparation method of ultra-pure isopropanol, so as to overcome the

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of ultrapure isopropanol
  • Preparation method of ultrapure isopropanol
  • Preparation method of ultrapure isopropanol

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] Reference figure 1 , Under normal temperature and pressure, add 2.0g of ethylenediaminetetraacetic acid disodium salt to 200l of industrial grade isopropanol, stir well and enter the electrophoresis tank 2 for 30 minutes of separation. Under the pressure of 0.6MPa, The flow rate of 80l / h passes through the cation exchange column 3 with strong acid D002 large pore sulfonic polystyrene resin, the anion exchange column 4 with strong basic D201 large pore styrene resin, and then enters the 4A molecular sieve. The molecular sieve dryer 5 is used for adsorption and dehydration, and the water content is controlled to be less than 90ppm; the resin dryer 6 equipped with super absorbent resin is dehydrated at a constant flow rate of 80l / h, and the water content is controlled to be less than 10ppm, and the flow rate is 80l / h. The microfilter 7, the working pressure is 0.6MPa, to remove impurity particles; it enters the four-stage rectification tower 8 lined with t...

Example Embodiment

[0024] Example 2

[0025] Reference figure 1 , Under normal temperature and pressure, add 6.0g of ethylenediaminetetraacetic acid disodium salt to 300l of industrial grade isopropanol, stir well and enter the electrophoresis tank 2 for 40 minutes of separation. Under 0.8MPa pressure, 100l / h flow rate through the cation exchange column 3 with strong acid D002 large pore sulfonic polystyrene resin, anion exchange column 4 with strong basic D201 large pore styrene resin, and then into the 4A molecular sieve The molecular sieve dryer 5 absorbs and dehydrates, and the water content is controlled to be less than 90ppm; it is dehydrated at a constant flow rate of 100l / h through the resin dryer 6 equipped with super absorbent resin, and the water content is controlled to be less than 10ppm, and the flow rate is 100l / h. Filter 7, working pressure of 0.6MPa, to remove impurity particles; enter the four-stage rectification tower 8 lined with tetrafluoroethylene for rectification, the refl...

Example Embodiment

[0026] Example 3

[0027] Reference figure 1 , Under normal temperature and pressure, add 20.0g of ethylenediaminetetraacetic acid disodium salt (EDTA) to 400l of industrial grade isopropanol, stir well and enter electrophoresis tank 2 for 60 minutes of separation, under 1.0MPa pressure , At a flow rate of 150l / h through the cation exchange column 3 containing strong acid D002 large pore sulfonic polystyrene resin, and the anion exchange column 4 containing strong basic D201 large pore styrene resin, and then enter 4A molecular sieve molecular sieve dryer 5 adsorption dehydration, control the water content to be less than 90ppm; at a constant flow rate of 150l / h through the resin dryer 6 equipped with super absorbent resin for dehydration, control the water content to be less than 10ppm, continue to 150l / h The flow rate enters the microfilter 7 and the working pressure is 0.6MPa to remove impurity particles; enters the four-stage rectification tower 8 lined with tetrafluoroethyl...

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 discloses a preparation method of ultrapure isopropanol, which comprises the following steps: by using industrial isopropanol as a raw material, adding a metal ion complexing agent ethylene diamine tetraacetic acid disodium salt to form a charged chelate, moving charged corpuscles to positive and negative poles through an electrophoresis tank, removing impurity ions in the isopropanol respectively by anion and cation exchange resin exchange, dehydrating through a molecular sieve and a superstrong water-absorbing resin, filtering with a microfilter, carrying out multistage continuous rectification, and filtering with a nanofilter to obtain the target product ultrapure isopropanol. The main body content of the ultrapure isopropanol is higher than 99.80, the water content is lower than 10 ppm, the cation content is lower than 0.1 ppb, and the anion content is lower than 50 ppb. The product has the advantages of high purity, low content of metal impurities and stable quality; and the method has high operation continuity and is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of ultra-pure isopropanol, in particular to a preparation method of an ultra-pure organic reagent that meets the requirements of the SEMI C12 standard for chemical materials formulated by the International Semiconductor Equipment and Materials Organization. Background technique [0002] With the rapid development of semiconductor materials, the quality and demand for ultra-clean and high-purity reagents are also rising. In the production process of integrated circuits, ultra-pure reagents can clean and etch the surface of chips and silicon wafers, and do not evaporate after volatilization. Metal, water, organic and mechanical impurities will remain. Ultra-pure isopropanol has been widely used in the production process of semiconductor materials and integrated circuits. Its processing size has gradually entered the era of submicron and deep submicron. The efficiency, electrical performance and reliability ha...

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
IPC IPC(8): C07C31/10C07C29/74C07C29/88C07C29/80
CPCC25B7/00
Inventor 李川川詹家荣蒋旭亮李海涛
Owner SHANGHAI CHEM REAGENT RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap