CN102397744A - Compound sulphur dispersing agent for complex iron desulphurization solution - Google Patents
Compound sulphur dispersing agent for complex iron desulphurization solution Download PDFInfo
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- CN102397744A CN102397744A CN2011101089502A CN201110108950A CN102397744A CN 102397744 A CN102397744 A CN 102397744A CN 2011101089502 A CN2011101089502 A CN 2011101089502A CN 201110108950 A CN201110108950 A CN 201110108950A CN 102397744 A CN102397744 A CN 102397744A
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Abstract
The invention relates to a compound sulphur dispersing agent for a complex iron desulphurization solution. The compound sulphur dispersing agent comprises multiple-carbon macro-molecular carbohydrates, alkylphenol polyoxyethylene, dipropyl amine and an aqueous solution of thiosulfate, wherein, the content of multiple-carbon macro-molecular carbohydrates in the compound sulphur dispersing agent is 5 to 12 g/L, the content of alkylphenol polyoxyethylene in the compound sulphur dispersing agent is 15 to 30 g/L, the content of dipropyl amine is 3 to 10 g/L, and the concentration of thiosulfate ions in the aqueous solution of thiosulfate is 0.2 to 0.8 mol/L. The dispersing agent is applicable to a desulphurization solution having a wide pH value range, can change surface properties of sulphur produced in the complex iron desulphurization solution and enables produced sulphur particles to have a particle size increased from 1 mu m to above 50 mu m, to be easy to settle and to have good fluidity; the addition of the compound sulphur dispersing agent has no influence on the desulphurization effect of the desulphurization solution.
Description
Technical field:
The invention belongs to the gas processing technique field, more particularly, relate to from containing H
2Remove H in the gas of S
2S also makes it to be converted into drusen and carries out sedimentation separation.
Background technology:
The Lo-Cat complexing iron desulfur technology that United States Filter Corp has; And the SulFerox complexing iron sulfur removal technology owned together of shell and Dow; Used sulphur improver is a kind of straight chain alkoxyl alcohols and is used for increasing and forms the drusen size in its desulfurization series solution; But when desulfuration solution pH value raise, the drusen granularity increased not obvious.
Patent US4402930 discloses the method that hydrogen sulfide and carbon dioxide in the multiple air-flow are removed in a kind of circulation, and sour gas is at specific reactant and meet C
nH
2n+1After a small amount of single alcohol crystals modifier contact of OH (n=4～18) general formula, the element sulphur in the hydrogen sulfide is converted into elemental sulfur.Meet C described in the patent
nH
2n+1Compound and the composition thereof of OH (n=4～18) are used to improve the drusen granularity, and be best with n=412, particularly butanols, amylalcohol, octanol, decyl alcohol, tip-nip and dodecanol and composition thereof.
Patent US4374104 designs a kind of wet oxidation reduction and desulfurization sulfur removal technology, and through hydrogen sulfide containing acid gas stream is contacted with comprising the water-soluble multivalence attitude of high valence state slaine, making the element sulphur catalytic oxidation is elemental sulfur.In addition, also add the non-ionic surface active agent of at least a low foaming in the patent, for example existing alkoxyl alcohol makes elemental sulfur assemble sedimentation and prevents that foam from producing.
More than only add nonionic surfactant in these methods and increase the drusen size that generates in the course of reaction; When the pH value of solution value raises; These non-ionic surface active agents reduce the increase ability of drusen granularity, and the drusen that causes forming can't effectively be assembled sedimentation.
Summary of the invention:
The purpose of this invention is to provide a kind of Compositional type sulphur dispersant that is used for complexing iron desulfuration solution; This dispersant can make the drusen that generates in the complexing iron desulfuration solution assemble sedimentation and have good flowability; When the pH environment of desulfuration solution operation was higher, the adding of Compositional type sulphur dispersant still can be increased to the gathering sedimentation that 50 μ m guarantee drusen with the drusen granularity that forms in addition.
Sweetening process of the present invention is meant, in the sulfide uptake zone, and the Fe of complex state
3+As oxidant, the sulfide oxidation in the liquid state is generated sulphur, itself is reduced to Fe
2+, the Fe of complex state in the renewing zone
2+Contact with dissolved oxygen, be oxidized into the Fe of complex state
3+Recover oxidability, get into the absorption region again.Its key reaction is following:
Overall reaction:
A kind of complexing iron desulfuration solution of the present invention is made up of the aqueous solution of the big molecule carbohydrate of many carbon, APES, di-n-propylamine and thiosulfate with Compositional type sulphur dispersant.
The content of the big molecule carbohydrate of wherein many carbon in Compositional type sulphur dispersant is 5～12g/L; The content of APES in Compositional type sulphur dispersant is 15～30g/L; The content of di-n-propylamine is 3～10g/L; The concentration of thiosulfate ion is 0.2～0.8mol/L in the thiosulfuric acid saline solution.
The big molecule carbohydrate of described many carbon be in anhydrous sorbitol, glucose, fructose and the sucrose one or more.
Described APES is OPEO, NPE, dodecyl phenol polyethenoxy ether or their composition.
The degree of polymerization of described OPEO, NPE or dodecyl phenol polyethenoxy ether is 8～12.
Described di-n-propylamine is di-n-propylamine, diisopropylamine or both mixtures.
A kind of complexing iron desulfuration solution of the present invention is with Compositional type sulphur dispersant, and is different to the pH value height of desulfuration solution, adopts the sulphur dispersant of variable concentrations that the drusen that generates is carried out modified test.When desulfuration solution pH value is below 9, the concentration of Compositional type sulphur dispersant is that 1～50ppm can make the drusen granularity increase to 50 μ m by 1 μ m, and sulphur is prone to filter, and has good flowability.
When desulfuration solution pH value is more than 10, the concentration of Compositional type sulphur dispersant is 50～100ppm, can make the drusen granularity that generates increase to 50 μ m by 0.7 μ m, and effectively sedimentation of sulphur is prone to filtration, and has good flowability.
A kind of complexing iron desulfuration solution of the present invention is with Compositional type sulphur dispersant; The desulfuration solution pH scope that can adapt to broad; Can change the surface nature that generates sulphur in the complexing iron desulfuration solution, make the drusen particle diameter that generates increased to more than the 50 μ m by 1 μ m, sulphur is easy to sedimentation; And have good mobility, the adding of Compositional type sulphur dispersant does not simultaneously have influence to the desulfurized effect of desulfuration solution.
Description of drawings:
Fig. 1 does not use the granularity of the drusen of sulphur dispersant formation to concentrate and is distributed in 0.7 μ m when being complexing iron desulfuration solution pH=10.
When being complexing iron desulfuration solution pH=10, uses Fig. 2 the concentrated 50 μ m that are distributed in of granularity of the drusen of Compositional type sulphur dispersant formation.
Specific embodiment
Embodiment 1:
Carry out the test of sulphur dispersant at the complexing ferrous solution of pH=8.5, estimate the performance of sulphur dispersant through the drusen size that generates, the drusen size adopts laser particle size analyzer to analyze.Concrete experimental condition is shown in table one:
Table one:
Embodiment 2:
Carry out the test of sulphur dispersant at the complexing ferrous solution of pH=9, estimate the performance of sulphur dispersant through the drusen size that generates, the drusen size adopts laser particle size analyzer to analyze.Concrete experiment condition is shown in table two:
Table two:
Embodiment 3:
Carry out the test of sulphur dispersant at the complexing ferrous solution of pH=10, estimate the performance of sulphur dispersant through the drusen size that generates, the drusen size adopts laser particle size analyzer to analyze.Concrete experiment condition is shown in table three
Table three:
Claims (6)
1. a complexing iron desulfuration solution is characterized in that with Compositional type sulphur dispersant: Compositional type sulphur dispersant is made up of the aqueous solution of the big molecule carbohydrate of many carbon, APES, di-n-propylamine and thiosulfate;
The content of the big molecule carbohydrate of wherein many carbon in Compositional type sulphur dispersant is 5～12g/L; The content of APES in Compositional type sulphur dispersant is 15～30g/L; The content of di-n-propylamine is 3～10g/L; The concentration of thiosulfate ion is 0.2～0.8mol/L in the thiosulfuric acid saline solution.
2. the described complexing iron of claim 1 desulfuration solution is characterized in that with Compositional type sulphur dispersant: the big molecule carbohydrate of many carbon be in anhydrous sorbitol, glucose, fructose and the sucrose one or more.
3. the described complexing iron of claim 1 desulfuration solution is characterized in that with Compositional type sulphur dispersant: APES is OPEO, NPE, dodecyl phenol polyethenoxy ether or their composition.
4. the described complexing iron of claim 3 desulfuration solution is characterized in that with Compositional type sulphur dispersant: the degree of polymerization of OPEO, NPE or dodecyl phenol polyethenoxy ether is 8～12.
5. the described complexing iron of claim 1 desulfuration solution is characterized in that with Compositional type sulphur dispersant: di-n-propylamine is di-n-propylamine, diisopropylamine or both mixtures.
6. the described complexing iron of claim 1 desulfuration solution is with the application of Compositional type sulphur dispersant; It is characterized in that: be used for containing the complexing iron desulfuration solution generation sulphur sedimentation separation of molysite, complexing agent component; When desulfuration solution pH value is below 9, the concentration of Compositional type sulphur dispersant is 1～50ppm; When desulfuration solution pH value is more than 10, the concentration of Compositional type sulphur dispersant is 50～100ppm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104138708A (en) * | 2013-05-07 | 2014-11-12 | 中国石油化工股份有限公司 | Sulfur deposition agent composition and method for improving liquid phase catalytic oxidation desulphurization effect |
| CN105194911A (en) * | 2015-09-29 | 2015-12-30 | 中北大学 | Sulfur particle flocculating agent applicable to iron-based desulfurizing solution |
| CN106219497A (en) * | 2016-07-05 | 2016-12-14 | 西安赫立盖斯新能源科技有限公司 | A kind of sulfur flocculant be applicable to low temperature environment |
| US10669172B2 (en) | 2017-08-23 | 2020-06-02 | Ecolab Usa Inc. | Elemental sulfur dispersant to control fouling in water systems |
| CN114367165A (en) * | 2021-05-25 | 2022-04-19 | 成都尚宇科技有限公司 | Desulfurizing agent and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1538925A (en) * | 1975-02-20 | 1979-01-24 | Air Resources | Removal of hydrogen sulphide from gas streams using chelated iron |
| CN1081930A (en) * | 1993-05-11 | 1994-02-16 | 华东化工学院 | Improved complex iron removes sulfide from admixture of gas |
| CN101773783A (en) * | 2010-03-17 | 2010-07-14 | 南京碳环生物质科技有限公司 | Wet catalytic oxidative desulfurization method for biogas |
| CN101874969A (en) * | 2009-12-31 | 2010-11-03 | 中北大学 | Sulfur particle settling agent used for desulfurization solution in wet oxidization process |
-
2011
- 2011-04-28 CN CN 201110108950 patent/CN102397744B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1538925A (en) * | 1975-02-20 | 1979-01-24 | Air Resources | Removal of hydrogen sulphide from gas streams using chelated iron |
| CN1081930A (en) * | 1993-05-11 | 1994-02-16 | 华东化工学院 | Improved complex iron removes sulfide from admixture of gas |
| CN101874969A (en) * | 2009-12-31 | 2010-11-03 | 中北大学 | Sulfur particle settling agent used for desulfurization solution in wet oxidization process |
| CN101773783A (en) * | 2010-03-17 | 2010-07-14 | 南京碳环生物质科技有限公司 | Wet catalytic oxidative desulfurization method for biogas |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104138708A (en) * | 2013-05-07 | 2014-11-12 | 中国石油化工股份有限公司 | Sulfur deposition agent composition and method for improving liquid phase catalytic oxidation desulphurization effect |
| CN104138708B (en) * | 2013-05-07 | 2016-04-27 | 中国石油化工股份有限公司 | The method of sulfur deposition agent composition and raising liquid catalyzed oxidation desulphurization effect |
| CN105194911A (en) * | 2015-09-29 | 2015-12-30 | 中北大学 | Sulfur particle flocculating agent applicable to iron-based desulfurizing solution |
| CN106219497A (en) * | 2016-07-05 | 2016-12-14 | 西安赫立盖斯新能源科技有限公司 | A kind of sulfur flocculant be applicable to low temperature environment |
| US10669172B2 (en) | 2017-08-23 | 2020-06-02 | Ecolab Usa Inc. | Elemental sulfur dispersant to control fouling in water systems |
| CN114367165A (en) * | 2021-05-25 | 2022-04-19 | 成都尚宇科技有限公司 | Desulfurizing agent and application thereof |
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| CN102397744B (en) | 2013-10-16 |
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