CN114367165A - Desulfurizing agent and application thereof - Google Patents
Desulfurizing agent and application thereof Download PDFInfo
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- CN114367165A CN114367165A CN202110569396.1A CN202110569396A CN114367165A CN 114367165 A CN114367165 A CN 114367165A CN 202110569396 A CN202110569396 A CN 202110569396A CN 114367165 A CN114367165 A CN 114367165A
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- 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
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
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Abstract
The invention relates to the field of hydrogen sulfide gas removal, and in particular relates to a desulfurizing agent and application thereof, wherein the desulfurizing agent comprises, by weight, 20-30 parts of complex iron salt, 0.5-3 parts of polyoxyethylene ether, 8-12 parts of alkaline substance and 320-340 parts of solvent. The application range of the desulfurizer is wide, and the desulfurizer can treat various H-containing gases2S gas including hydrogen sulfide gas generated in the processes of natural gas exploitation, oil field exploitation, petroleum refining, coking, geothermal gas power generation, lubricating oil production, chemical fertilizer production, garbage treatment and the like has high selectivity and removal rate, the removal rate of one-step reaction reaches more than 99.99 percent, and the treatment is carried outSpent tail gas H2The concentration of S is below 1-10 ppm.
Description
Technical Field
The invention relates to the field of hydrogen sulfide gas removal, and in particular relates to a desulfurizing agent and application thereof.
Background
The industrial waste gas hydrogen sulfide is usually accompanied in the processes of natural gas exploitation, oil field exploitation, petroleum refining, coking, geothermal gas power generation, lubricating oil production, chemical fertilizer production, garbage treatment and the like, the hydrogen sulfide gas is a toxic and harmful gas, after the hydrogen sulfide gas in the air reaches a certain concentration, people are in the environment for a long time, the poisoning symptoms such as dizziness, headache and the like are easily caused, the life health of people is seriously threatened, and meanwhile, the hydrogen sulfide discharged in the air can also cause environmental pollution.
At present, dry desulfurization methods including dry absorption methods, dry oxidation methods and adsorption methods and wet desulfurization methods including absorption methods and oxidation methods are used for removing hydrogen sulfide gas. The dry desulfurization method is relatively simple in process, but has high desulfurization cost and small sulfur amount to be treated. The wet desulphurization method mainly adopts a complex iron method at present, and has the characteristics of high oxidation regeneration speed, easy recovery of sulfur, no pollution of a desulfurizer and the like, but the current wet desulphurization method can achieve a better desulphurization effect under a higher using amount in the desulphurization process, and simultaneously has low once removal rate of high-concentration hydrogen sulfide gas, repeated desulphurization is needed, the daily desulphurization amount is low, and the type of the desulfurizer used by the current wet desulphurization method is complex and is not beneficial to configuration.
Disclosure of Invention
Aiming at the problems in the prior art, the first aspect of the invention provides a desulfurizing agent, which comprises, by weight, 20-30 parts of complex iron salt, 0.5-3 parts of polyoxyethylene ether, 8-12 parts of alkaline substance and 340 parts of solvent.
In a preferred embodiment of the present invention, the alkaline substance is an organic or inorganic strong base.
As a preferable technical scheme of the invention, the desulfurizer also comprises 20-35 parts by weight of complexing agent.
In a preferred embodiment of the present invention, the complexing agent is one or more selected from the group consisting of aminocarboxylic acids or salts thereof, hydroxycarboxylic acids or salts thereof, and polyhydric alcohol compounds.
As a preferable technical scheme of the invention, the polyoxyethylene ether comprises fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether.
As a preferable technical scheme of the invention, the polyoxyethylene ether comprises C7-12Fatty alcohol polyoxyethylene ether and C7-12Alkylphenol ethoxylates.
As a preferable technical scheme of the invention, the desulfurizer also comprises 1-3 parts by weight of polyaspartate.
In a preferred embodiment of the present invention, the solvent includes water and alcohol.
As a preferable technical scheme of the invention, the weight ratio of the water to the alcohol is (43-55): 1.
the second aspect of the invention provides the application of the desulfurizer in the processes of natural gas removal exploitation, oil field exploitation, petroleum refining, coking, geothermal gas power generation, lubricating oil production, fertilizer production, garbage treatment and the like.
Compared with the prior art, the invention has the following beneficial effects:
(1) sorbitol, sodium citrate, sodium nitrilotriacetate and iminodisuccinic acid sodium salt are used as complexing agents, when strong alkali substances are contained in the solution, iron ions adapt to the change of pH value in the solution, and the desulfurization effect is improved;
(2) according to the method, the isomeric dodecyl alcohol polyoxyethylene ether and nonyl alcohol polyoxyethylene ether are adopted, and meanwhile, the nonyl phenol polyoxyethylene ether is combined, so that the precipitation rate of sulfur particles is improved, and excessive floating of the sulfur particles is avoided; in addition, the addition of polyaspartate further avoids floating sulphur particles;
(3) in the application, the water and the glycol are compounded, so that the diffusion rate of ions in the solution is accelerated, and the desulfurization efficiency is further improved;
(4) the method has the advantages that the removal rate of the sulfureted hydrogen of the vulcanizing agent is high, the removal rate of one-step reaction reaches more than 99.99 percent, and the treated tail gas H2The concentration of S is below 1-10 ppm;
(5) the application range of the desulfurizer is wide, and the desulfurizer can treat various H-containing gases2The S gas comprises hydrogen sulfide gas generated in the processes of natural gas exploitation, oil field exploitation, petroleum refining, coking, geothermal gas power generation, lubricating oil production, chemical fertilizer production, garbage treatment and the like, and has high selectivity;
(6) the desulfurizer has high operation elasticity and can adapt to H in feed gas2The concentration of S and the flow rate of raw material gas are 0-100%Large amplitude fluctuation variation of the wave;
(7) the desulfurizer is environment-friendly, and no three wastes are generated;
(8) when the desulfurizer is used, the reaction condition is mild, and the reaction process is a liquid phase reaction process at normal temperature and normal pressure;
(9) the desulfurizer has simple use process, and is simple to start, stop and daily operate;
(10) the desulfurizer has high economic performance and strong operability;
(11) the desulfurizer has high safety performance, does not use any toxic chemical substance, and does not contain H in sulfur products2S gas;
Detailed Description
The present invention is illustrated by the following specific embodiments, but is not limited to the specific examples given below.
The first aspect of the invention provides a desulfurizing agent, which comprises, by weight, 20-30 parts of complex iron salt, 0.5-3 parts of polyoxyethylene ether, 8-12 parts of an alkaline substance and 340 parts of a solvent.
In one embodiment, the desulfurizing agent further comprises 20 to 35 parts by weight of a complexing agent.
In one embodiment, the desulfurizing agent further comprises 1 to 3 parts by weight of polyaspartate.
In one embodiment, the desulfurizing agent further comprises 1 to 10 parts by weight of a reducing agent.
In a preferred embodiment, the desulfurizing agent comprises, by weight, 21-25 parts of a complex iron salt, 1.4-2.5 parts of polyoxyethylene ether, 9.05-11.1 parts of an alkaline substance, 327-332 parts of a solvent, 26.5-31 parts of a complexing agent, 1.5-2.5 parts of polyaspartate and 4.5-5.5 parts of a reducing agent.
Complexing iron salts
The complexed iron salt described herein is not particularly limited and can be routinely selected by one skilled in the art.
In one embodiment, the complexed ferric salt is ferric ethylenediaminetetraacetic acid sodium salt.
Alkaline substance
In one embodiment, the basic substance is a strong organic or inorganic base.
Preferably, the alkaline substance is an organic strong base and an inorganic strong base.
In one embodiment, the weight ratio of the strong organic base to the strong inorganic base is 1: (90-220).
Preferably, the weight ratio of the organic strong base to the inorganic strong base is 1: 200.
in one embodiment, the strong organic base is monoethanolamine.
In one embodiment, the inorganic strong base is potassium hydroxide and potassium carbonate.
Preferably, the weight ratio of the potassium hydroxide to the potassium carbonate is 1: (1.5-3); more preferably, the weight ratio of the potassium hydroxide to the potassium carbonate is 1: 2.
complexing agents
In one embodiment, the complexing agent is selected from one or more of aminocarboxylic acids or salts thereof, hydroxycarboxylic acids or salts thereof, and polyol compounds.
Preferably, the complexing agent comprises aminocarboxylate, hydroxycarboxylic acid or salt thereof, polyol compound.
In one embodiment, the weight ratio of aminocarboxylate, hydroxycarboxylic acid salt, polyol compound is (7-9.2): 1: (1-2).
Preferably, the weight ratio of the amino carboxylate, the hydroxyl carboxylate and the polyol compound is 8: 1: 1.5.
in one embodiment, the aminocarboxylate is selected from one or more of nitrilotriacetate, ethylenediaminetetraacetate, diethylenetriaminepentacarboxylate, nitrilotriacetate, iminodisuccinate.
Preferably, the aminocarboxylate is nitrilotriacetate and iminodisuccinate.
In one embodiment, the weight ratio of nitrilotriacetate to iminodisuccinate is 1: (1.8-2.7).
Preferably, the weight ratio of the nitrilotriacetate to the iminodisuccinate is 1: 2.
the aminocarboxylate herein may be either a sodium or potassium salt.
In one embodiment, the salt of a hydroxycarboxylic acid is selected from one or more of the group consisting of tartrate, heptonate, gluconate, alginate, and citrate.
Preferably, the salt of a hydroxycarboxylic acid is a citrate salt.
The salt of the hydroxycarboxylic acid described herein may be a potassium salt or a sodium salt.
In one embodiment, the polyol compound is sorbitol.
In the prior art, some weak base is added in the desulfurizer, so that the pH fluctuation in the solution is small in the desulfurization process, the unexpected discovery in the application of the present application that when some strong base is used, the desulfurization rate can be accelerated to a certain extent, and the pH fluctuation in the solution is large at the moment, so that the absorption of hydrogen sulfide in the solution and the desulfurization effect are influenced, the applicant unexpectedly discovers that when the complexing agent in the desulfurizer comprises sorbitol, sodium citrate, sodium nitrilotriacetate and iminodisuccinic acid sodium salt, the desulfurization effect can be improved at the moment, the removal rate reaches over 99.99 percent, the applicant considers that the possible reason is that the 4 specific complexing agents comprise aminocarboxylate, hydroxycarboxylic acid salt and polyol compound, and when the iron ions and the sulfur ions in the ethylenediaminetetraacetic acid iron sodium salt are subjected to redox reaction, the iron ions can adapt to the change of the pH in the solution, form various stable complex systems, and play a role of removing the sulfur ions all the time.
Polyoxyethylene ethers
Polyoxyethylene ethers, also known as polyethylene oxides or polyethylene oxides. Is a crystalline, thermoplastic, water-soluble polymer. It is a novel water-soluble resin and a non-ionic surfactant. The demand of various industries for the polyoxyethylene ether is increasing day by day, and the production and application prospects of the polyoxyethylene ether are wide from the development field.
In one embodiment, the polyoxyethylene ethers include fatty alcohol polyoxyethylene ethers and alkylphenol polyoxyethylene ethers.
Preferably, the weight ratio of the fatty alcohol-polyoxyethylene ether to the alkylphenol ethoxylate is (0.9-3): 1; more preferably, the weight ratio of the fatty alcohol-polyoxyethylene ether to the alkylphenol ethoxylate is 2: 1.
preferably, the polyoxyethylene ether comprises C7-12Fatty alcohol polyoxyethylene ether and C7-12Alkylphenol ethoxylates.
In this application C7-12Respectively, refer to the alkyl carbon number in the fatty alcohol and the alkylphenol.
In one embodiment, the fatty alcohol-polyoxyethylene ether includes the isomeric decyl alcohol polyoxyethylene ethers and nonyl alcohol polyoxyethylene ethers.
Preferably, the type of the isomeric dodecyl alcohol polyoxyethylene ether is selected from one or more of E-03, E-05, E-06, E-07 and E-09; more preferably, the isomeric dodecyl polyoxyethylene ether is E-06 in type.
The isomeric dodecyl alcohol polyoxyethylene ether is purchased from Heian petrochemical plants in Jiangsu province.
The nonanol polyoxyethylene ether is purchased from Wuhan Kabuda chemical Co., Ltd.
Preferably, the weight ratio of the isomeric dodecyl alcohol polyoxyethylene ether to the isomeric nonyl alcohol polyoxyethylene ether is (0.1-0.7): 1; more preferably, the weight ratio of the isomeric decyl alcohol polyoxyethylene ether to the isomeric nonyl alcohol polyoxyethylene ether is 0.5: 1.
in one embodiment, the alkylphenol ethoxylate is octylphenol ethoxylate.
The octyl phenol polyoxyethylene ether is purchased from Linyi national mechanical and chemical industry Co., Ltd, and the model is emulsifier OP-15.
In the application, ethylene diamine tetraacetic acid ferric sodium salt is a complex ferric salt, and is combined with a complexing agent in the application, so that the reaction rate is accelerated, the sulfur precipitation rate is higher, and excessive sulfur particles are adsorbed by tiny bubbles or wrapped by hydrocarbon and float on the surface of a solution before precipitation, the method commonly adopted at present is to complex the generated sulfur simple substance, and then enter subsequent equipment for desulfurization to generate precipitated sulfur, however, the method increases the desulfurization procedure The surface tension between the sulfur particles and the air bubbles is reduced between the air bubbles, so that the floating sulfur particles are quickly precipitated, and the sulfur particles are prevented from being accumulated on the surface of the solution. Meanwhile, the polyoxyethylene ether in the proportion spreads on the surface of the hydrocarbon to prevent the hydrocarbon from wrapping the elemental sulfur.
Polyaspartic acid salt
The form of the salt of polyaspartic acid described in the present application is not particularly limited, and potassium salt, sodium salt and the like can be exemplified.
In one embodiment, the polyaspartate is potassium polyaspartate.
The polyaspartic acid potassium is purchased from Jinan Weizhen chemical Limited, the content of the polyaspartic acid potassium is more than or equal to 96 wt%, and the product number is WZ-101.
The addition of polyoxyethylene ether in the application can generate certain bubbles in the solution, the bubbles reduce the contact probability between iron ions and hydrogen sulfide in the solution and reduce the desulfurization efficiency, and some defoaming agents can be added for defoaming at present, the applicant has surprisingly found that when the model of isomeric dodecyl alcohol polyoxyethylene ether is E-06 and the desulfurizing agent also comprises polyaspartate, the bubble generation amount is small, and the existence of floating sulfur simple substance can be avoided, the applicant considers that the possible reason is a molecular chain group formed between longer molecular chains in the potassium polyaspartate, the spherical gyration radius of the polyoxyethylene ether micelle ions is increased, and meanwhile, the flexible molecular weight of the polyoxyethylene ether is redistributed and mutually attracted with the nonpolar groups of the molecular chain of the potassium polyaspartate, and the molecular chain distribution is non-uniform and interacts, further resulting in an increase in the viscosity of the solution, increasing the resistance to air growth within the foam, and reducing the air-bubbling properties.
The applicant has found that the primary desulfurization effect is poor when the initial hydrogen sulfide concentration exceeds 4500mg/L, and, in addition, the applicant has unexpectedly found that, under the condition that polyaspartate and sorbitol, sodium citrate, sodium nitrilotriacetate and sodium iminodisuccinate are simultaneously existed, the primary desulfurization effect of initial hydrogen sulfide concentration over 4500mg/L can be improved, and the applicant believes that the possible reason is that under the condition, peptide bonds and carboxyl in polyaspartate molecules, hydrogen bonds are formed among sorbitol, sodium citrate, sodium nitrilotriacetate and iminodisuccinic acid sodium salt molecules, particularly, the sodium nitrilotriacetate and the iminodisuccinic acid sodium salt are easy to be distributed in the desulfurizer system to prevent small amount of accumulation, under the condition of higher initial hydrogen sulfide concentration, the reduction of the combination reaction probability of iron ions and sulfur ions in the solution is avoided.
Reducing agent
The reducing agent is not particularly limited in the present application, and any reducing agent suitable for a desulfurizing agent system can be selected by those skilled in the art.
In one embodiment, the reducing agent is sodium hydroxymethyl sulfonate, CAS: 870-72-4.
The sodium hydroxymethyl sulfonate is used as intermediate for sodium isoniazid sulfonate, neoarsine and carcinodride. It is also used as protein fragrance fixative, lead-zinc ore floating lotion and color photographic assistant (preventing pollution and fading), and cotton cloth printing industry.
Solvent(s)
In one embodiment, the solvent comprises water and an alcohol.
Preferably, the alcohol is a diol and/or a triol; further preferably, the alcohol is a diol; more preferably, the alcohol is ethylene glycol.
In one embodiment, the weight ratio of water to alcohol is (43-55): 1.
preferably, the weight ratio of water to alcohol is 50: 1.
the composition of water and ethylene glycol in the application accelerates the diffusion rate of ions in the solution, and further improves the desulfurization efficiency.
In one embodiment, the method of preparing the desulfurization agent comprises: mixing all the components of the desulfurizer to obtain the desulfurizer.
In a second aspect, the present application provides the use of the desulfurization agent in processes of natural gas removal exploitation, oil field exploitation, petroleum refining, coking, geothermal gas power generation, lubricating oil production, fertilizer production, waste treatment, and the like.
Examples
Hereinafter, the present invention will be described in more detail by way of examples, but it should be understood that these examples are merely illustrative and not restrictive. The starting materials used in the examples which follow are all commercially available unless otherwise stated.
Example 1
The embodiment 1 of the invention provides a desulfurizer, which comprises the following raw materials in parts by weight:
20 parts of complex iron salt, 0.5 part of polyoxyethylene ether, 8 parts of alkaline substance, 320 parts of solvent, 20 parts of complexing agent, 1 part of polyaspartic acid potassium and 1 part of reducing agent.
The complexing ferric salt is ethylenediamine tetraacetic acid ferric sodium salt.
The polyoxyethylene ether is fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether, and the weight ratio of the polyoxyethylene ether to the alkylphenol polyoxyethylene ether is 0.9: 1; the fatty alcohol polyoxyethylene ether is heterogeneous lauryl alcohol polyoxyethylene ether and nonyl alcohol polyoxyethylene ether, and the weight ratio of the lauryl alcohol polyoxyethylene ether to the nonyl alcohol polyoxyethylene ether is 0.1: 1, the alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether; the isomeric dodecyl alcohol polyoxyethylene ether is purchased from Heian petrochemical plants in Jiangsu province, and has the model of E-06, the nonyl alcohol polyoxyethylene ether is purchased from Wuhan Kabuda chemical company Limited, and the octyl phenol polyoxyethylene ether is purchased from Linyi national force chemical company Limited, and has the model of emulsifier OP-15.
The alkaline substance is organic strong base and inorganic strong base, and the weight ratio of the alkaline substance to the inorganic strong base is 1: 90, respectively; the organic strong base is monoethanolamine, the inorganic strong base is potassium hydroxide and potassium carbonate, and the weight ratio of the organic strong base to the inorganic strong base is 1: 1.5.
the solvent is water and glycol, and the weight ratio of the solvent to the glycol is 43: 1.
the complexing agent is a mixture of amino carboxylate, hydroxyl carboxylate and polyol compound, and the weight ratio is 7: 1: 1; the amino carboxylate is sodium nitrilotriacetate and tetrasodium iminodisuccinate, and the weight ratio of the amino carboxylate to the tetrasodium iminodisuccinate is 1: 1.8; the hydroxyl carboxylate is sodium citrate; the polyalcohol compound is sorbitol.
The reducing agent is sodium hydroxymethyl sulfonate.
The potassium polyaspartate is purchased from Jinan Weizhen chemical industry Co., Ltd, the content is more than or equal to 96 wt%, and the product number is WZ-101.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 2
The embodiment 2 of the invention provides a desulfurizer, which comprises the following raw materials in parts by weight:
30 parts of complex iron salt, 3 parts of polyoxyethylene ether, 12 parts of alkaline substance, 340 parts of solvent, 35 parts of complexing agent, 3 parts of polyaspartic acid potassium and 10 parts of reducing agent.
The complexing ferric salt is ethylenediamine tetraacetic acid ferric sodium salt.
The polyoxyethylene ether is fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether, and the weight ratio of the polyoxyethylene ether to the alkylphenol polyoxyethylene ether is 3: 1; the fatty alcohol polyoxyethylene ether is heterogeneous lauryl alcohol polyoxyethylene ether and nonyl alcohol polyoxyethylene ether, and the weight ratio of the lauryl alcohol polyoxyethylene ether to the nonyl alcohol polyoxyethylene ether is 0.7: 1, the alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether; the isomeric dodecyl alcohol polyoxyethylene ether is purchased from Heian petrochemical plants in Jiangsu province, and has the model of E-06, the nonyl alcohol polyoxyethylene ether is purchased from Wuhan Kabuda chemical company Limited, and the octyl phenol polyoxyethylene ether is purchased from Linyi national force chemical company Limited, and has the model of emulsifier OP-15.
The alkaline substance is organic strong base and inorganic strong base, and the weight ratio of the alkaline substance to the inorganic strong base is 1: 220, 220; the organic strong base is monoethanolamine, the inorganic strong base is potassium hydroxide and potassium carbonate, and the weight ratio of the organic strong base to the inorganic strong base is 1: 3.
the solvent is water and glycol, and the weight ratio of the solvent to the glycol is 55: 1.
the complexing agent is a mixture of amino carboxylate, hydroxyl carboxylate and polyol compound, and the weight ratio is 9.2: 1: 1; the amino carboxylate is sodium nitrilotriacetate and tetrasodium iminodisuccinate, and the weight ratio of the amino carboxylate to the tetrasodium iminodisuccinate is 1: 2.7; the hydroxyl carboxylate is sodium citrate; the polyalcohol compound is sorbitol.
The reducing agent is sodium hydroxymethyl sulfonate.
The potassium polyaspartate is purchased from Jinan Weizhen chemical industry Co., Ltd, the content is more than or equal to 96 wt%, and the product number is WZ-101.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 3
The embodiment 3 of the invention provides a desulfurizer, which comprises the following raw materials in parts by weight:
22 parts of complex iron salt, 2 parts of polyoxyethylene ether, 10 parts of alkaline substance, 330 parts of solvent, 28 parts of complexing agent, 2 parts of polyaspartic acid potassium and 5 parts of reducing agent.
The complexing ferric salt is ethylenediamine tetraacetic acid ferric sodium salt.
The polyoxyethylene ether is fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether, and the weight ratio of the polyoxyethylene ether to the alkylphenol polyoxyethylene ether is 2: 1; the fatty alcohol polyoxyethylene ether is heterogeneous lauryl alcohol polyoxyethylene ether and nonyl alcohol polyoxyethylene ether, and the weight ratio of the lauryl alcohol polyoxyethylene ether to the nonyl alcohol polyoxyethylene ether is 0.5: 1, the alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether; the isomeric dodecyl alcohol polyoxyethylene ether is purchased from Heian petrochemical plants in Jiangsu province, and has the model of E-06, the nonyl alcohol polyoxyethylene ether is purchased from Wuhan Kabuda chemical company Limited, and the octyl phenol polyoxyethylene ether is purchased from Linyi national force chemical company Limited, and has the model of emulsifier OP-15.
The alkaline substance is organic strong base and inorganic strong base, and the weight ratio of the alkaline substance to the inorganic strong base is 1: 200 of a carrier; the organic strong base is monoethanolamine, the inorganic strong base is potassium hydroxide and potassium carbonate, and the weight ratio of the organic strong base to the inorganic strong base is 1: 2.
the solvent is water and glycol, and the weight ratio of the solvent to the glycol is 50: 1.
the complexing agent is a mixture of amino carboxylate, hydroxyl carboxylate and polyol compound, and the weight ratio is 8: 1: 1.5; the amino carboxylate is sodium nitrilotriacetate and tetrasodium iminodisuccinate, and the weight ratio of the amino carboxylate to the tetrasodium iminodisuccinate is 1: 2; the hydroxyl carboxylate is sodium citrate; the polyalcohol compound is sorbitol.
The reducing agent is sodium hydroxymethyl sulfonate.
The potassium polyaspartate is purchased from Jinan Weizhen chemical industry Co., Ltd, the content is more than or equal to 96 wt%, and the product number is WZ-101.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 4
The embodiment 4 of the invention provides a desulfurizing agent, which is the same as the embodiment 3 in the specific implementation manner, and is different in that the polyoxyethylene ether is fatty alcohol-polyoxyethylene ether, the fatty alcohol-polyoxyethylene ether is isomeric decyl polyoxyethylene ether and nonyl polyoxyethylene ether, and the weight ratio of the polyoxyethylene ether to the nonyl polyoxyethylene ether is 0.5: 1, the isomeric dodecyl alcohol polyoxyethylene ether is purchased from Heian petrochemical plants in Jiangsu province, the model is E-06, and the nonyl alcohol polyoxyethylene ether is purchased from Wuhan Kabuda chemical Co.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 5
The embodiment 5 of the invention provides a desulfurizing agent, which is the same as the embodiment 3 in the specific implementation mode, and is different from the polyoxyethylene ether in the model of an emulsifier OP-15, wherein the polyoxyethylene ether is octyl phenol polyoxyethylene ether which is purchased from Linyi national mechanical chemical Co.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 6
The embodiment 6 of the invention provides a desulfurizing agent, which has the same specific implementation manner as the embodiment 3, and is different from the embodiment 3 in that the polyoxyethylene ethers are fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether, and the weight ratio of the polyoxyethylene ethers to the alkylphenol polyoxyethylene ethers is 2: 1; the fatty alcohol polyoxyethylene ether is heterogeneous lauryl alcohol polyoxyethylene ether and nonyl alcohol polyoxyethylene ether, and the weight ratio of the lauryl alcohol polyoxyethylene ether to the nonyl alcohol polyoxyethylene ether is 0.5: 1, the alkylphenol polyoxyethylene ether is cardanol polyoxyethylene ether; the isomeric dodecyl alcohol polyoxyethylene ether is purchased from Heian petrochemical plants in Jiangsu province, and has the model of E-06, the nonyl alcohol polyoxyethylene ether is purchased from Wuhan Kabuda chemical Co., Ltd, the cardanol polyoxyethylene ether is purchased from Lossen chemical Co., Ltd, the model of BGF-6, and the product number of 1263111.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 7
Example 7 of the present invention provides a desulfurizing agent, which is similar to example 3 in the following description, except that the amount of the polyaspartic acid potassium salt is 0 part by weight.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 8
The embodiment 8 of the invention provides a desulfurizing agent, which is the same as the embodiment 3 in the specific implementation mode, and is characterized in that the isomeric dodecyl alcohol polyoxyethylene ether is E-09 and is purchased from Haian petrochemical plants in Jiangsu province.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 9
Example 9 of the present invention provides a desulfurizing agent, which is the same as example 3 in the specific embodiment, except that the isomeric tridecanol polyoxyethylene ether is type E-03 and is purchased from heian petrochemical plant, Jiangsu province.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 10
The embodiment 10 of the invention provides a desulfurizing agent, which has the same specific implementation manner as the embodiment 3, and is characterized in that the complexing agents are sodium nitrilotriacetate and tetrasodium iminodisuccinate, and the weight ratio of the complexing agents is 1: 2.
the preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 11
The embodiment 11 of the present invention provides a desulfurizing agent, which is the same as in embodiment 3 in specific implementation, and is different in that the complexing agent is an amino carboxylate and a polyol compound, and the weight ratio of the complexing agent to the polyol compound is 8: 1.5, the aminocarboxylate is sodium nitrilotriacetate and tetrasodium iminodisuccinate, and the weight ratio of the aminocarboxylate is 1: 2, the polyalcohol compound is sorbitol.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Example 12
The embodiment 12 of the present invention provides a desulfurizing agent, which is the same as in embodiment 3 in specific implementation manner, and is different in that the complexing agent is a mixture of an organic phosphate, a hydroxycarboxylic acid salt, and a polyol compound, and the weight ratio is 8: 1: 1.5; the organic phosphate is ethylene diamine tetra methylene sodium phosphate; the hydroxyl carboxylate is sodium citrate; the polyalcohol compound is sorbitol.
The preparation method of the desulfurizer comprises the following steps: all the components of the desulphurating agent are mixed.
Performance evaluation
Desulfurization degree: the desulfurizing agent pair concentrations obtained in examples 1 to 3 were 15000mg/m, respectively3And (3) performing a removal test on the hydrogen sulfide gas, wherein the desulfurization rate (%) (total mass of the inlet hydrogen sulfide-total mass of the outlet hydrogen sulfide)/total mass of the inlet and outlet hydrogen sulfide, and recording the concentration of the outlet hydrogen sulfide. The results are shown in Table 1.
TABLE 1
After the desulfurization was completed, the surface of the used release agent solution was recorded as to whether there were any floating sulfur particles. The results are shown in Table 2.
TABLE 2
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. The desulfurizer is characterized by comprising, by weight, 20-30 parts of complex iron salt, 0.5-3 parts of polyoxyethylene ether, 8-12 parts of alkaline substance and 340 parts of solvent.
2. The desulfurizing agent according to claim 1, wherein the basic substance is a strong organic or inorganic base.
3. The desulfurizing agent according to claim 2, further comprising 20 to 35 parts by weight of a complexing agent.
4. The desulfurizing agent according to claim 3, wherein the complexing agent is selected from one or more of aminocarboxylic acid or its salt, hydroxycarboxylic acid or its salt, and polyol compound.
5. The desulfurizing agent according to claim 4, wherein the polyoxyethylene ethers include fatty alcohol polyoxyethylene ethers and alkylphenol polyoxyethylene ethers.
6. The desulfurizing agent according to claim 5, wherein the polyoxyethylene ether comprises C7-12Fatty alcohol polyoxyethylene ether and C7-12Alkylphenol ethoxylates.
7. The desulfurizing agent according to any one of claims 1 to 6, wherein the desulfurizing agent further comprises 1 to 3 parts by weight of polyaspartate.
8. The desulfurization agent of claim 7, wherein the solvent comprises water and an alcohol.
9. The desulfurization agent of claim 8, wherein the weight ratio of water to alcohol is (43-55): 1.
10. use of the desulfurizing agent according to any one of claims 1 to 9 for removing hydrogen sulfide gas generated during natural gas extraction, oil field extraction, petroleum refining, coking, geothermal gas power generation, lubricating oil production, fertilizer production, garbage disposal, etc.
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