CN106928028A - A kind of absolute ethyl alcohol purifying technique - Google Patents
A kind of absolute ethyl alcohol purifying technique Download PDFInfo
- Publication number
- CN106928028A CN106928028A CN201710105185.6A CN201710105185A CN106928028A CN 106928028 A CN106928028 A CN 106928028A CN 201710105185 A CN201710105185 A CN 201710105185A CN 106928028 A CN106928028 A CN 106928028A
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- Prior art keywords
- ethyl alcohol
- absolute ethyl
- filter
- purifying technique
- liquid
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/78—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by condensation or crystallisation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Laminated Bodies (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention belongs to chemicals technical field, it is related to a kind of absolute ethyl alcohol purifying technique, step includes that over-molecular sieve, secondary filter, desalination and quality inspection are filling.This technique can obtain the absolute ethyl alcohol of ultralow metals content impurity, meet the use demand of precise electronic industry, and extraction energy consumption cost is greatly reduced relative to rectification process, with the more preferable market competitiveness.
Description
Technical field
The present invention relates to chemicals technical field, more particularly to a kind of saving energy consumption and suitable precise electronic can be produced
The purifying technique of the absolute ethyl alcohol that industry needs.
Background technology
Absolute ethyl alcohol refers to purity ethanol water higher, and purity is just referred to as absolute ethyl alcohol typically more than 99.5%.
Absolute ethyl alcohol is commonly used as organic solvent, adds in the production such as optics, semiconductor, semiconductor assembly and test, LED, TFT-LCD, TP
Cleaning solution can be used as in work.In precise electronic industry, the purity of solvent has harsher requirement, because if solvent
Interior metals content impurity is too high, the change of resistance can be brought after use, or even can produce short circuit problem.
In order that absolute ethyl alcohol can be applied to precise electronic industry, common method is the method for rectifying.Micro gold
Category can be stayed in Liquid Residue, and ethanol water can then be distilled out of and obtain metal-free refined soln.This method removal metal is thorough
Bottom, but rectifying will expend substantial amounts of heat, bring the rising of product cost, commercially lack competitiveness.
Therefore a kind of new method of purification is needed to obtain being adapted to the absolute ethyl alcohol of precise electronic industry needs.
The content of the invention
It is a primary object of the present invention to provide a kind of saving energy consumption and suitable precise electronic industry needs can be produced
The purifying technique of absolute ethyl alcohol.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of absolute ethyl alcohol purifying technique, step is：
1. over-molecular sieve：Rough absolute ethyl alcohol is squeezed into mole sieve drier, liquid is taken；
2. secondary filter：1. gained liquid is filtered step by accurate filter, takes liquid；
3. desalination：By step, 2. gained liquid squeezes into film filter and carries out desalination, takes liquid；
4. quality inspection is filling：To step, 3. gained liquid is detected, filling after meeting the prescribed standards.
Specifically, the step 1. in mole sieve drier filler use 3A molecular sieves.
Specifically, the step 2. in filter element of precision filter use 0.2 micrometer ceramicses filter core.
Specifically, the step 3. in film filter select hydrophobicity PVDF-PTFE film filters.
Using above-mentioned technical proposal, the beneficial effect of technical solution of the present invention is：
This technique can obtain the absolute ethyl alcohol of ultralow metals content impurity, meet the use demand of precise electronic industry, phase
Extraction energy consumption cost is greatly reduced for rectification process, with the more preferable market competitiveness.
Specific embodiment
A kind of absolute ethyl alcohol purifying technique, step is：
1. over-molecular sieve：Rough absolute ethyl alcohol is squeezed into mole sieve drier, liquid is taken；
2. secondary filter：1. gained liquid is filtered step by accurate filter, takes liquid；
3. desalination：By step, 2. gained liquid squeezes into film filter and carries out desalination, takes liquid；
4. quality inspection is filling：To step, 3. gained liquid is detected, filling after meeting the prescribed standards.
The present invention is described in further detail with reference to specific embodiment.
Embodiment：
1. over-molecular sieve
The rough absolute ethyl alcohol (aqueous about 0.2wt%) of 2000L is squeezed into 3A mole sieve driers drying to moisture content
Below 0.05wt%.
2. secondary filter
1. gained liquid is filtered by the accurate filter of 0.2 micrometer ceramicses filter core to make step, further removes water drying.
3. desalination
By step, 2. gained liquid squeezes into hydrophobicity PVDF-PTFE film filters, carries out desalination, obtains liquid.
4. quality inspection
By step, 3. gained liquid carries out main component and the detection of Fe, Ca tenor.
Reference examples：
Rough absolute ethyl alcohol is processed according to common molecular sieve drying and the method for rectifying, after distillating liquid collection
Carry out main component and the detection of Fe, Ca tenor.
Embodiment gained absolute ethyl alcohol is shown in Table 1 with reference examples gained absolute ethyl alcohol contrast situation.
Table 1：
| Component content | Embodiment | Reference examples |
| Ethanol | 99.7~99.9% | 99.5~99.8% |
| Water | 0.05~0.1% | 0.1~0.2% |
| Fe | ≤100ppb | - |
| Ca | ≤200ppb | - |
As shown in Table 1, this technique is not less than the absolute ethyl alcohol of rectification process being obtained in that purity, and moisture is lower,
Metals content impurity is ultralow simultaneously, has been enough to meet the use demand of precise electronic industry.But this technique is without heating feelings
Completed under condition, it is clear that extraction energy consumption cost is greatly reduced relative to rectification process, with the more preferable market competitiveness.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, not
On the premise of departing from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
Enclose.
Claims (4)
1. a kind of absolute ethyl alcohol purifying technique, it is characterised in that step is：
1. over-molecular sieve：Rough absolute ethyl alcohol is squeezed into mole sieve drier, liquid is taken；
2. secondary filter：1. gained liquid is filtered step by accurate filter, takes liquid；
3. desalination：By step, 2. gained liquid squeezes into film filter and carries out desalination, takes liquid；
4. quality inspection is filling：To step, 3. gained liquid is detected, filling after meeting the prescribed standards.
2. on the absolute ethyl alcohol purifying technique described in claim 1, it is characterised in that：The step 1. in molecular sieve drying
Device filler uses 3A molecular sieves.
3. on the absolute ethyl alcohol purifying technique described in claim 1, it is characterised in that：The step 2. in accurate filter
Filter core uses 0.2 micrometer ceramicses filter core.
4. on the absolute ethyl alcohol purifying technique described in claim 1, it is characterised in that：The step 3. in film filter choosing
With hydrophobicity PVDF-PTFE film filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710105185.6A CN106928028A (en) | 2017-02-25 | 2017-02-25 | A kind of absolute ethyl alcohol purifying technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710105185.6A CN106928028A (en) | 2017-02-25 | 2017-02-25 | A kind of absolute ethyl alcohol purifying technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106928028A true CN106928028A (en) | 2017-07-07 |
Family
ID=59423096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710105185.6A Pending CN106928028A (en) | 2017-02-25 | 2017-02-25 | A kind of absolute ethyl alcohol purifying technique |
Country Status (1)
| Country | Link |
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| CN (1) | CN106928028A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249850A (en) * | 2011-05-31 | 2011-11-23 | 无锡市东风化工厂 | Method for preparing high-purity isopropanol |
| CN205360639U (en) * | 2015-12-28 | 2016-07-06 | 山东鲁华海洋生物科技有限公司 | One set of alcohol distillation purification device |
-
2017
- 2017-02-25 CN CN201710105185.6A patent/CN106928028A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249850A (en) * | 2011-05-31 | 2011-11-23 | 无锡市东风化工厂 | Method for preparing high-purity isopropanol |
| CN205360639U (en) * | 2015-12-28 | 2016-07-06 | 山东鲁华海洋生物科技有限公司 | One set of alcohol distillation purification device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170707 |