CN101066516A - Decarbonizing solution comprising borate - Google Patents
Decarbonizing solution comprising borate Download PDFInfo
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- CN101066516A CN101066516A CN 200710041691 CN200710041691A CN101066516A CN 101066516 A CN101066516 A CN 101066516A CN 200710041691 CN200710041691 CN 200710041691 CN 200710041691 A CN200710041691 A CN 200710041691A CN 101066516 A CN101066516 A CN 101066516A
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- decarbonizing
- hbo
- borate
- decarbonizing solution
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Abstract
The present invention discloses one kind of decarbonizing solution comprising borate, and features that the decarbonizing solution is water solution of K2HBO3 in the concentration of 18-35 wt%. The decarbonizing solution comprising borate has excellent decarbonizing performance, no oxidation, no contained virulent chemical and no contamination on underground water.
Description
Technical field
This relates to the solution that removes carbon dioxide from gaseous mixture.
Technical background
Remove carbon dioxide from oxygen containing gaseous mixture, often run into industrial, for example, the carbon dioxide that the side reaction of ethylene oxide production plant generates must remove, so that reaction gas recycles; The flue gas that is generated behind the combustion of industrial boiler not only contains high carbon dioxide but also contain excess oxygen, for reclaim in the flue gas carbon dioxide or in order to reduce emission of carbon-dioxide, also need to remove carbon dioxide.
Industrial solution round-robin method removes carbon dioxide physical solvent process and chemical reaction solvent method, and still, no matter physical solvent and chemical reaction solvent, along with technical development and the requirement that cuts down the consumption of energy, the decarbonization solvent general trend is to use organic solvent.
Yet the containing oxygen and will make organic solvent generation oxidative degradation of gas causes equipment to stop up and problem such as corrosion, seriously influences lasting operation continuously.
For this reason, nowadays the decarbonizing process in the ethylene oxide device still adopts ancient oxidation resistant hot potassium carbonate solution.Since the sixties in 20th century, though various organic activator can improve the infiltration rate of hot potash to carbon dioxide, because they contain oxygen degraded and all can not be suitable for.
GB1415036A disclosed borate activator according to a certain ratio in 1975, and existing part factory has used this activator in China's ethylene oxide device so far.But this activator contains V
2O
5, except valency was expensive, it was the chemicals of severe toxicity, is heavy metal compound, can pollute underground water.
Summary of the invention
The purpose of this invention is to provide a kind of decarbonizing solution of forming by borate, to overcome the above-mentioned defective that prior art exists.
Decarbonizing solution of the present invention is characterized in that, is a kind of K
2HBO
3The aqueous solution of weight content 18～35%, its pH is 13.0～13.9;
Adopt the above-mentioned decarbonizing solution of forming by borate to absorb CO
2Reaction as follows:
K
2HBO
3+CO
2+H
2O→KHCO
3+KH
2BO
3
KH
2BO
3+CO
2+H
2O→KHCO
3+H
3BO
3
K
2HBO
3Aqueous solution pH is 13.8～13.9, and KH
2BO
3Be KBO
2Aqueous solution pH is 11.1～11.9;
The preparation method of the decarbonizing solution of being made up of borate of the present invention comprises the steps:
H with 2 moles KOH and 1 mole
3BO
3Reaction adds water then, and preparation becomes said weight concentration, gets final product, and reaction equation is as follows:
2KOH+H
3BO
3→K
2HBO
3
Adopt document Ind.Eng.Chem.Res.40, the decarbonization device of 2001.P898-901 report is tested various decarbonizing solutions, the results are shown in Table 1:
Table 1
| Decarbonizing solution % (weight) | Decarburized amount (mol/h) |
| 25％K 2CO 3(4.42mol K/l) | 0.335 |
| 25％K 2HBO 3(4.42mol K/l) | 0.428 |
| KH 2BO 3(sloughing a water is KBO 2，4.42mol K/l) | 0.377 |
By table 1 as seen, the decarbonization performance of decarbonizing solution of the present invention is better than solution of potassium carbonate, is higher than 25.5% of solution of potassium carbonate, is higher than KH
2BO
313% of solution.
The invention still further relates to a kind of K of containing
2HBO
3And K
2CO
3Decarbonizing solution, wherein: K
2HBO
3Weight content be 1～10%, K
2CO
3Weight content be 20～30%;
Adopt document Ind.Eng.Chem.Res.40, the laboratory decarbonization device of 2001.P898-901 report is tested result such as table 2 and table 3:
Table 2
| K 2CO 3% (weight) | KBO% (weight) | V 2O 5% (weight) | Decarburized amount molCO 2/h |
| 25 | 0 | 0 | 0.335 |
| 25 | 4 | 1.33 | 0.471 |
| 25 | 5 | 1.66 | 0.490 |
| 25 | 7 | 2.33 | 0.520 |
| 25 | 8 | 2.66 | 0.530 |
| 25 | 10 | 3.33 | 0.500 |
Wherein: V
2O
5Be form adding with KVO, but according to V
2O
5Quantity is calculated.
Table 3
| K 2CO 3% (weight) | K 2HBO 3% (weight) | Decarburized amount molCO 2/h |
| 25 | 0 | 0.335 |
| 25 | 1 | 0.369 |
| 25 | 3 | 0.478 |
| 25 | 5 | 0.521 |
| 25 | 6 | 0.552 |
| 25 | 7.5 | 0.479 |
By table 3 as seen, K
2HBO
3Adding, help K
2CO
3The raising of solution decarbonization performance, still, addition has a limit, surpasses this limit, add again into, will cause the minimizing of decarburized amount, this is because in the solution, the salinity transition increase cause carbon dioxide the physical dissolution degree extremely reduce in solution due to.
By table 2 and table 3 as seen, K of the present invention
2HBO
3With K
2CO
3The decarbonization performance of the decarbonizing solution of cooperate forming, before being better than by K
2CO
3, KBO and V
2O
5The decarbonizing solution of forming, and wherein do not contain noxious material V
2O
5
By table 3 as seen, contain K
2HBO
3And K
2CO
3Decarbonizing solution in: K
2HBO
3Weight content be preferably 3～7.5%, most preferably 5～6%.
This shows that the decarbonizing solution of being made up of borate of the present invention not only has very superior decarbonization performance, not oxidation simultaneously, does not contain the chemicals of severe toxicity, can not pollute underground water.
The specific embodiment
Embodiment 1
The preparation method:
H with 2 moles KOH and 1 mole
3BO
3Reaction adds water then, and preparation becomes K
2HBO
3Weight content be 22% decarbonizing solution.
Above-mentioned decarbonizing solution is used for the decarbonization device that ethylene oxide device is produced in certain ethene oxidation;
Pressure is 2.34MPa, and this installs former employing weight concentration is 18% K
2CO
3Decarbonizing solution is used K now instead
2HBO
3Weight content be 22% decarbonizing solution, under the constant situation of other condition, the production capacity of decarbonization device improves 40%.
Embodiment 2
The preparation method:
To containing CO
2Certain blast furnace gas carry out decarburization, former employing weight concentration is 25% K
2CO
3Solution adds weight concentration and is 5% K now
2HBO
3, under the constant situation of other working condition, device capability increases 50%.
Embodiment 3
In certain ethylene oxide production plant, former employing weight content is 32% K
2CO
3Solution removes carbon dioxide wherein, changes into now:
K
2CO
3Weight content is 25%, K
2HBO
3Weight content is 7% solution, and under the constant situation of other condition of production, device capability improves 55%.
Claims (5)
1. a decarbonizing solution of being made up of the borate aqueous solution is characterized in that, is a kind of K
2HBO
3Weight content be 18～35% the aqueous solution.
2. the decarbonizing solution of being made up of the borate aqueous solution according to claim 1 is characterized in that, pH is 13.0～13.9.
3. a decarbonizing solution of being made up of the borate aqueous solution is characterized in that decarbonizing solution contains K
2HBO
3And K
2CO
3Decarbonizing solution, wherein: K
2HBO
3Weight content be 1～10%, K
2CO
3Weight content be 20～30%.
4. the decarbonizing solution of being made up of the borate aqueous solution according to claim 3 is characterized in that K
2HBO
3Weight content be 3～7.5%.
5. the decarbonizing solution of being made up of the borate aqueous solution according to claim 3 is characterized in that K
2HBO
3Weight content 5～6%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710041691XA CN101066516B (en) | 2007-06-06 | 2007-06-06 | Decarbonizing solution comprising borate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710041691XA CN101066516B (en) | 2007-06-06 | 2007-06-06 | Decarbonizing solution comprising borate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101066516A true CN101066516A (en) | 2007-11-07 |
| CN101066516B CN101066516B (en) | 2011-04-20 |
Family
ID=38879295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710041691XA Expired - Fee Related CN101066516B (en) | 2007-06-06 | 2007-06-06 | Decarbonizing solution comprising borate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101066516B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350368A (en) * | 2011-06-22 | 2012-02-15 | 河北科技大学 | Potassium carbonate solution based catalytic system used for removing CO2 in fume |
| CN102441316A (en) * | 2011-09-23 | 2012-05-09 | 中国石油化工股份有限公司 | Decarburization solution containing vanadate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1074201B (en) * | 1955-12-13 | 1960-01-28 | ||
| GB1415036A (en) * | 1972-09-08 | 1975-11-26 | Benfield Corp | Separation of co2 from gas mixtures |
| FI53141C (en) * | 1975-09-02 | 1978-02-10 | Keskuslaboratorio | |
| CN1005381B (en) * | 1985-04-20 | 1989-10-11 | 华东化工学院 | Separation co2 from other gas of mixture |
-
2007
- 2007-06-06 CN CN200710041691XA patent/CN101066516B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350368A (en) * | 2011-06-22 | 2012-02-15 | 河北科技大学 | Potassium carbonate solution based catalytic system used for removing CO2 in fume |
| CN102441316A (en) * | 2011-09-23 | 2012-05-09 | 中国石油化工股份有限公司 | Decarburization solution containing vanadate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101066516B (en) | 2011-04-20 |
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Granted publication date: 20110420 Termination date: 20140606 |