CN108261887A - A kind of method that carbinol-modified low-temp methanol is washed - Google Patents
A kind of method that carbinol-modified low-temp methanol is washed Download PDFInfo
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- CN108261887A CN108261887A CN201810201095.1A CN201810201095A CN108261887A CN 108261887 A CN108261887 A CN 108261887A CN 201810201095 A CN201810201095 A CN 201810201095A CN 108261887 A CN108261887 A CN 108261887A
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- methanol
- washed
- carbinol
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- gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/202—Alcohols or their derivatives
- B01D2252/2021—Methanol
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/60—Additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/60—Additives
- B01D2252/602—Activators, promoting agents, catalytic agents or enzymes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Detergent Compositions (AREA)
Abstract
Low temperature methanol cleaning chemical industry skill, because it is selectively good to gas component, degree of purification is high, become the general choice of current coal chemical industry gas purification.Certain corresponding complex media is added in selected methanol solvate, it reduces the surface tension of methanol solvate, change the property that methanol solvate only exists sour gas Physical Absorption dissolving, so as to accelerate absorption rate of the methanol solvate to sour gas, accelerate the rate of purification process, shorten the time of contact of methanol solvate and gas, reduce available gas (H2, CO) solubility in methyl alcohol, reduce purification process available gas (H2, CO) loss, achieve the purpose that the energy-saving of purification process.
Description
Technical field
The invention belongs to field of gas purification, and in particular to low temperature methanol cleaning chemical industry skill it is energy-saving.
Background technology
Coal gasification occupies certain proportion in field of energy utilization, and has gradually widened trend.The follow-up place of coal gasification
All there are gas purification processes for reason.
Low temperature methanol cleaning chemical industry skill, because it is selectively good to gas component, degree of purification is high, become current coal chemical industry
The general choice of gas purification.It is all single methanol liquid that low-temp methanol, which washes used methanol solvate, is limited by gas-liquid suction
The influence of pure physical effect that the film effect and methanol solvate of receipts process dissolve acid aspiration, increases Gas-Liquid Absorption
Time of contact reduces solubility that methanol solvate absorbs gas, increases available gas (H2, CO) dissolving in methyl alcohol
Degree, increases available gas (H2, CO) loss.
Invention content
The object of the present invention is to provide methanol solvates in a kind of low temperature methanol cleaning chemical industry skill to add corresponding complex media
Method, so as to reduce the surface tension of methanol solvate and cause methanol solvate that there is the performance to the chemical absorbing of sour gas,
So as to achieve the purpose that the energy-saving of low temperature methanol cleaning process.
The present invention technical concept be：
There are gas-liquid film effects to needing the absorption of the sour gas in purification gas for pure methanol solvate, hinder methanol solvate to gas
Absorption rate；Pure methanol solvate hinders methanol molten to the absorption of the sour gas in purification gas is needed to only exist physical dissolution process
Agent is to the absorption rate of sour gas.
Specific surfactant, the surface tension for reducing methanol solvate are added in methanol solvate, in methanol solvate
Add specific alkali solute, formed methanol solvate sour gas Physical Absorption and chemical absorbing are carried out at the same time, so as to accelerate first
Rate of the alcoholic solvent to the gas purification that need to be purified.
The present invention technical solution be：
During low temperature methanol cleaning chemical industry skill, specific surfactant is added in methanol solvate reduces the table of methanol solvate
Face tension.
During low temperature methanol cleaning chemical industry skill, specific alkali solute is added in methanol solvate, forms methanol solvate pair
Performance of the absorption of sour gas with Physical Absorption and chemical absorbing.
The activator includes the mixture of organic matter, inorganic matter or both；The addition temperature of activator is -70 ~ 140
Under the conditions of DEG C, the activator added has the intersolubility with methanol solvate, and mixture viscosity does not occur significantly to increase after mixing
It does not decompose greatly and at 140 DEG C.
The activator includes the mixture of ether, silicone oil or both.
The quality of the activator is the 0.01-5% of the methanol additive amount.
The activator is silicone oil, and the addition quality of silicone oil is the 0.1% of the methanol additive amount.
The alkali solute includes the mixture of organic matter, inorganic matter or a variety of media；The addition temperature of alkali solute
Under the conditions of -70 ~ 140 DEG C, with the intersolubility of methanol solvate, mix after mixture viscosity do not occur significantly to increase, Yi Ji
140 DEG C are not decomposed.
The alkali solute includes the mixture of monoethanolamine, diethanol amine or both.
The quality of the alkali solute is the 0.05-5% of the methanol additive amount.
The alkali solute is monoethanolamine, and the quality of monoethanolamine is the 0.5% of the methanol additive amount.
Based on the above technical solution, the invention also includes during low temperature methanol cleaning chemical industry skill, in methanol
Surfactant and alkali solute are added in solvent.The surfactant includes the mixture of ether, silicone oil or both.Alkali
Property solute include the mixture of monoethanolamine, diethanol amine or both.The quality of the activator is the methanol additive amount
0.05%；The quality of monoethanolamine is the 0.45% of the methanol additive amount.
Technical solution using the present invention is suitable for two sections of neat absorption techniques of Shandong, one section of absorption technique of Lin De, Dalian
The classical low-temp methanol washing process of Polytechnics's design.
Specific embodiment
With reference to embodiment, the present invention is described further
Embodiment 1
Low-temp methanol is washed in methanol solvate used and adds ether（The quality of ether is the 0.1% of methanol solvate quality）As table
Face activator reduces the surface tension of methanol, increases low-temp methanol washing process process gas-liquid mass transfer rate.
Low-temp methanol wash improved relative to two sections of neat absorption techniques of Shandong 1.5% rate.
Embodiment 2
Low-temp methanol is washed in methanol solvate used and adds silicone oil（The quality of silicone oil is the 0.5% of methanol solvate quality）As table
Face activator reduces the surface tension of methanol, increases low-temp methanol washing process process gas-liquid mass transfer rate.
Low-temp methanol wash improved relative to two sections of neat absorption techniques of Shandong 0.5% rate.
Embodiment 3
Low-temp methanol washes the mixed solvent of addition ether and silicone oil in methanol solvate used（The quality of ether is methanol solvate matter
The quality of 0.04% and silicone oil of amount is the 1.1% of methanol solvate quality）, the surface tension of methanol is reduced, increases low-temp methanol and washes
Technical process gas-liquid mass transfer rate.
Low-temp methanol wash improved relative to one section of absorption technique of Lin De 3.3% rate.
Embodiment 4
Low-temp methanol washes the mixed solvent of addition ether and silicone oil in methanol solvate used（The quality of ether is methanol solvate matter
The quality of 0.3% and silicone oil of amount is the 0.05% of methanol solvate quality）, the surface tension of methanol is reduced, increases low-temp methanol and washes
Technical process gas-liquid mass transfer rate.
Low-temp methanol wash improved relative to one section of absorption technique of Lin De 4% rate.
Embodiment 5
Low-temp methanol washes addition monoethanolamine (MEA) in methanol solvate used（The quality of monoethanolamine is methanol solvate quality
0.25%）So that methanol solvate has the dual property of Physical Absorption and chemical absorbing during to acid aspiration.
Low-temp methanol wash improved relative to the classical low-temp methanol washing process that Dalian University of Technology designs 1.2% rate.
Embodiment 6
Low-temp methanol washes addition diethanol amine (DEA) in methanol solvate used（The quality of diethanol amine is methanol solvate quality
3%）So that methanol solvate has the dual property of Physical Absorption and chemical absorbing during to acid aspiration.
Low-temp methanol wash improved relative to the classical low-temp methanol washing process that Dalian University of Technology designs 0.8% rate.
Embodiment 7
Low-temp methanol washes the mixture of addition alkali solute monoethanolamine and diethanol amine in methanol solvate used（Monoethanolamine
Quality be methanol solvate quality 0.15%；The quality of diethanol amine is the 2.3% of methanol solvate quality）So that methanol solvate
There is the dual property of Physical Absorption and chemical absorbing during to acid aspiration.
Low-temp methanol wash improved relative to one section of absorption technique of Lin De 1.5% rate.
Embodiment 8
Low-temp methanol washes the mixture of addition alkali solute monoethanolamine and diethanol amine in methanol solvate used（Monoethanolamine
Quality be methanol solvate quality 1.0 %；The quality of diethanol amine is the 0.35% of methanol solvate quality）So that methanol solvate
There is the dual property of Physical Absorption and chemical absorbing during to acid aspiration.
Low-temp methanol wash improved relative to two sections of neat absorption techniques of Shandong 3.3% rate.
Embodiment 9
Low-temp methanol is washed in methanol solvate used while adds the activator silicone oil for reducing methanol surface tension（The quality of ether
0.4% for methanol solvate quality）, alkali solute monoethanolamine（The quality of monoethanolamine is the 0.2% of methanol solvate quality）, drop
The surface tension of low methanol increases methanol solvate with to sour gas chemical absorptive power.
The rate that low-temp methanol improves 2.4% relative to two sections of neat absorption techniques of Shandong are washed.
Low-temp methanol, which washes addition in methanol solvate used, reduces the activator of methanol surface tension, reduces the surface of methanol
Tension increases the mass transfer rate of methanol liquid liquid film, more than selected activator should all have in -70 ~ 140 DEG C of temperature conditions
Under, with the intersolubility of methanol solvate, mix after good mobility and thermo-chemical stability；
Low-temp methanol is washed in methanol solvate used and adds alkali solute so that methanol solvate is during to acid aspiration
Dual property with Physical Absorption and chemical absorbing, more than selected alkali solute should all have in -70 ~ 140 DEG C of temperature
Under the conditions of, with the intersolubility of methanol solvate, mix after good mobility and thermo-chemical stability, and selected alkali solute
With need the salt that the acid medium in purification gas generates there is pyrolytic, can hot recycling.
Claims (9)
1. a kind of method that carbinol-modified low-temp methanol is washed, which is characterized in that washed in low-temp methanol in methanol solvate used
Add activator or alkali solute.
2. the method that carbinol-modified low-temp methanol according to claim 1 is washed, which is characterized in that the activator packet
Include the mixture of organic matter, inorganic matter or both；Under the conditions of the addition temperature of activator is -70 ~ 140 DEG C, the activation added
Agent has intersolubility with methanol solvate, and mixture viscosity does not occur significantly to increase and at 140 DEG C do not occur point after mixing
Solution.
3. the method that the carbinol-modified low-temp methanol described in claims 1 or 2 is washed, which is characterized in that the activator packet
Include the mixture of ether, silicone oil or both.
4. the method that the carbinol-modified low-temp methanol described in claim 3 is washed, which is characterized in that the quality of the activator
0.01-5% for the methanol additive amount.
5. the method that the carbinol-modified low-temp methanol described in claim 4 is washed, which is characterized in that the activator is silicon
Oil, the addition quality of silicone oil are the 0.1% of the methanol additive amount.
6. the method that carbinol-modified low-temp methanol according to claim 1 is washed, which is characterized in that the alkali solute
Include the mixture of organic matter, inorganic matter or a variety of media；Under the conditions of the addition temperature of alkali solute is -70 ~ 140 DEG C, with first
Mixture viscosity does not occur significantly to increase and do not decompose at 140 DEG C after the intersolubility of alcoholic solvent, mixing.
7. the method that the carbinol-modified low-temp methanol described in claim 1 or 6 is washed, which is characterized in that the alkali solute
Include the mixture of monoethanolamine, diethanol amine or both.
8. the method that the carbinol-modified low-temp methanol described in claim 7 is washed, which is characterized in that the matter of the alkali solute
Measure the 0.05-5% for the methanol additive amount.
9. the method that carbinol-modified low-temp methanol according to any one of claims 8 is washed, which is characterized in that the alkali solute is one
Ethanol amine, the quality of monoethanolamine are the 0.5% of the methanol additive amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810201095.1A CN108261887A (en) | 2018-03-12 | 2018-03-12 | A kind of method that carbinol-modified low-temp methanol is washed |
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| CN201810201095.1A CN108261887A (en) | 2018-03-12 | 2018-03-12 | A kind of method that carbinol-modified low-temp methanol is washed |
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| CN108261887A true CN108261887A (en) | 2018-07-10 |
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| CN201810201095.1A Pending CN108261887A (en) | 2018-03-12 | 2018-03-12 | A kind of method that carbinol-modified low-temp methanol is washed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113144831A (en) * | 2021-03-08 | 2021-07-23 | 灵谷化工集团有限公司 | Device and method for performing low-temperature methanol double washing based on heat exchange and modified methanol |
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| CN104275083A (en) * | 2013-07-05 | 2015-01-14 | 中国石油天然气股份有限公司 | Capturing and separating CO from gas mixture2Method (2) |
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| CN101264412A (en) * | 2008-04-30 | 2008-09-17 | 王胜利 | Decarburization solvent and preparation thereof |
| GB2464368A (en) * | 2008-10-14 | 2010-04-21 | Cyril Timmins | A solvent regeneration process |
| CN102085445A (en) * | 2010-12-17 | 2011-06-08 | 惠生工程（中国）有限公司 | Modification solution for removing acid gas of low-temperature methanol cleaning process |
| CN104275083A (en) * | 2013-07-05 | 2015-01-14 | 中国石油天然气股份有限公司 | Capturing and separating CO from gas mixture2Method (2) |
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Application publication date: 20180710 |