CN114452777A - Special ultralow-emission desulfurization solvent for SCOT tail gas of sulfur recovery device of oil refinery - Google Patents
Special ultralow-emission desulfurization solvent for SCOT tail gas of sulfur recovery device of oil refinery Download PDFInfo
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- CN114452777A CN114452777A CN202210082902.9A CN202210082902A CN114452777A CN 114452777 A CN114452777 A CN 114452777A CN 202210082902 A CN202210082902 A CN 202210082902A CN 114452777 A CN114452777 A CN 114452777A
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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
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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
- B01D53/1425—Regeneration of liquid 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
- B01D53/1468—Removing hydrogen sulfide
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- C—CHEMISTRY; METALLURGY
- 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
-
- 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
- B01D2252/205—Other organic compounds not covered by B01D2252/00 - B01D2252/20494
- B01D2252/2053—Other nitrogen compounds
Abstract
The invention relates to a special ultralow-emission desulfurization solvent for SCOT tail gas of a sulfur recovery device of an oil refinery, which comprises 95.5-96.0% of MDEA (N-methyldiethanolamine), 1.5-2.5% of piperazine, 1.5-2.5% of water and 0.1-0.3% of a special defoaming agent for a desulfurizing agent by mass percentage. The desulfurization solvent has high selectivity (high CO)2Good selectivity to H ₂ S under concentration), large sulfur capacity, and H in the SCOT tail gas after removal2S can be reduced to below 20 ppmv.
Description
Technical Field
The invention relates to a desulfurization solvent, and in particular relates to a special ultralow-emission desulfurization solvent for SCOT tail gas.
Background
The national environmental protection department published the release draft of the emission Standard of pollutants for the Petroleum refining industry (GB 31570) in 2015, 5 months and 16 days, and the Standard definitely stipulates the sulfur dioxide (SO) in the tail gas discharged by the sulfur recovery device of the refinery in general areas in China2) The limiting value of the concentration is 400mg/m3Emission limit of 100mg/m in particular regions3(ii) a And the new enterprise is specified to execute the standard in 2015, 7, month and 1, and the existing enterprise executes the standard in 2017, 7, month and 1. SO specified in GB315702The limit value is not only far lower than 960mg/m specified in GB162973(newly built enterprises) is lower than the general MACT II standard (714 mg/m) set by the national Environmental Protection Agency (EPA) aiming at petroleum refining enterprises3）。
In order to meet the requirements of the standard, a large number of Claus process sulfur recovery tail gas devices built in refineries in China are faced with technical transformation and/or upgrading.
Limited by thermodynamic equilibrium at reaction temperature, even if a catalyst with good reaction activity and a three-stage conversion process are adopted, the highest recovery rate of sulfur in the traditional Claus device can only reach 97-98%, so that tail gas of the sulfur device is stillContaining a large amount of H2S、SO2Liquid sulfur and other organic sulfur compounds, all of which will be burned to end up with SO2Is discharged to the atmosphere. Taking a three-stage conversion Claus device (with the scale of 47.7 t/d) built in Sinclair refinery, Wyoming U.S. A, the SO in the burnt exhaust gas is discharged at the temperature of 677-732 DEG C2Has a concentration of 7097X 10-6(v) The mass concentration is up to 20.3g/m3。
Since the 1970 s, many technological advances have occurred in the claus process, which was essentially developed along two lines: one is to improve the process itself to increase sulfur recovery or plant efficiency, which includes development of new catalysts, lean acid gas sulfur production technology, oxygen-rich (sulfur recovery) processes, and the like; and the tail gas treatment process of the sulfur recovery device is vigorously developed. A super SCOT process appeared.
Since 1973, about 230 industrial devices are built around the world, and the matched Claus process device has the scale of 3-4000 t/d, and is the most widely applied technology in the tail gas treatment process aiming at the sulfur recovery device at present.
Shell (Shell) company developed super SCOT (super SCOT) process in 1991, and 6 sets of industrial devices were put into production in 1996, wherein 2 sets of devices were built in the high-male oil refinery in Taiwan of China. The data show that the total sulfur recovery rate of the process reaches 99.95 percent, and the total sulfur concentration (in terms of sulfur content) in the purified tail gas is lower than 50 multiplied by 10-6(v) Converted into SO (in the exhaust gas)2The concentration is about 143 mg/m3. Even if the super SCOT process is adopted, the stack emission of the sulfur device is SO under the condition that the total sulfur recovery rate of the sulfur device is improved from 99.0 percent to more than or equal to 99.95 percent2The concentration is about 143 mg/m3The restriction requirement of < 100mg/m emission in special areas of GB31570-2015 for high harvest in rice and wheat cannot be met. The fundamental reason is that the hydrogenation tail gas of the SCOT process has high content of CO2More occupation of the basic center of MDEA interferes with the desulfurization solvent (MDEA) pair H2S absorption to remove H from the gas2S is not reduced to less than 30mg/Nm2After S is incinerated, SO2The concentration exceeds the standard. So that it is necessary to increase H in an important degree2The S can be discharged after reaching the standard due to the selectivity problem. The technical key of the super SCOT process is as follows:
(1) the rich liquid regeneration tower of the tail gas selective absorption desulfurization part is divided into an upper section and a lower section, part of solution (semi-barren solution) of the rich liquid after shallow regeneration at the upper section returns to the middle part of the selective absorption tower, and the rest part enters the lower section for deep regeneration. Returning the deeply regenerated ultra-lean solution to the top of the selective absorption tower.
(2) And reducing the temperature of the barren liquor entering the selective absorption tower. Purification of H from tail gas under typical operating conditions when the lean solution temperature is reduced by 10 deg.C2The S concentration (design value) was reduced by about 10%.
According to the recent requirements of the current process technology development trend and environmental protection emission, the technical scheme of the Claus unit tail gas reaching the standard can be roughly summarized into 4 types as shown in the following table:
the SCOT method process is still a mature technology which is most widely applied and has the highest total sulfur recovery rate in the current sulfur recovery tail gas treatment process. The technological progress of improving the total sulfur recovery rate of the conventional SCOT process can be summarized as adopting a steric hindrance amine selective absorption desulfurization solvent, and reducing the temperature of the barren solution and the sulfur content (ultra-barren solution).
All the extension type tail gas treatment processes cannot achieve the purpose of discharging SO in tail gas2Concentration limit 400mg/m3The requirements of (2) must be further processed. The combined novel process is suitable for technical transformation of all established extension type tail gas treatment devices, so that the total sulfur recovery rate is improved from 99.0 percent to more than or equal to 99.95 percent.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects in the prior art and provide a sulfur-containing catalyst which has high sulfur capacity and is specific to H2Good S absorption selectivity, fine desulfurization, H2S can be reduced to below 30ppmv, and the sulfur removal solvent with ultra-low emission is special for SCOT tail gas of a sulfur recovery device of an oil refinery.
The technical scheme is as follows: in order to solve the technical problem, the special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery device of the oil refinery comprises the following components in percentage by mass,
MDEA 95.5-96.0%；
1.5 to 2.5 percent of piperazine;
1.5 to 2.5 percent of water;
0.1 to 0.3 percent of defoaming agent special for desulfurizing agent.
Further, the MDEA is N-methyldiethanolamine of which has a molecular formula of CH3N(CH2CH2OH)2。
Further, the molecular formula of piperazine is C4H10N2。
Further, the special antifoaming agent for the desulfurizing agent is modified dimethyl silicone oil.
Further comprises the following components in percentage by mass,
MDEA 95.8%；
2.0% of piperazine;
2.0 percent of water;
0.2 percent of special antifoaming agent for the desulfurizing agent.
Further, the special antifoaming agent for MDEA, piperazine, water and desulfurizer in the claim 1 is added into a reaction kettle to be stirred, and the special ultralow-emission desulfurization solvent for SCOT tail gas of a sulfur recovery device in an oil refinery can be obtained.
The main components of the MDEA (N-methyldiethanolamine) refinery gas desulfurizing agent in the oil refinery have strong superiority in the problems of corrosivity, dissolution degradation, foaming and the like, and the desulfurizing agent is used in China in the 1980 s and is widely used in all oil refineries in the 1990 s. MDEA is tertiary amine desulfurizer, has weak alkalinity and weak bonding force with carbon dioxide, and can selectively absorb hydrogen sulfide when carbon dioxide and hydrogen sulfide coexist, thereby reducing load of solvent regeneration.
The MDEA absorption principle is as follows:
MDEA having a basic center of N atom, and H2S、CO2Iso-acid gas adsorption. The adsorption is physical adsorption, the regenerated poor solvent (without acid gas) absorbs acid gas at about 40 ℃ in the absorption tower to become rich solvent, and the rich solvent is desorbed at 125-130 ℃ in the regeneration tower to release H2S、CO2The gas becomes a lean solvent for recycling.
(HOCH2CH2)2NCH3+H2S→(HOCH2CH2)2NH+CH3+HS-(transient reaction) (1)
Since tertiary amine has no hydrogen atom on nitrogen atom, it cannot react with CO2The direct reaction must be carried out by the following procedure.
CO2+H2O→H++HCO3 -(Slow reaction) (2)
H++(HOCH2CH2)2NCH3→(HOCH2CH2)2NH+CH3+HS-(transient reaction) (3)
CO2+H2O+(HOCH2CH2)2NCH3→(HOCH2CH2)2NH+CH3+ HCO3 -
MDEA vs. H due to the extremely slow reaction (2) rate2S has higher selectivity.
MDEA: the purity of the N-methyldiethanolamine of the MDEA is more than or equal to 99.5 percent.
N-Methyldiethanolamine (MDEA), a tertiary amine. Molecular formula is CH3N(CH2CH2OH)2The molecular weight is 119.16, the specific gravity is 1.0418, the boiling point is 247 ℃, the viscosity at 12 ℃ is 101cp, the freezing point is-48 ℃, and the water-soluble chitosan-chitosan composite material can be completely dissolved in water. The MDEA can be prepared by a commercial product or an existing process. The production process of the MDEA adopts the most advanced international channelization reaction, namely ethylene oxide and pure monomethylamine react in a tubular reactor under the pressure of 2.5MPa, and the MDEA is obtained by distillation and rectification, wherein the purity is more than or equal to 99.5%.
Piperazine: (C)4H10N2 ）
The appearance is white solid, melting point 106 ℃ (379K), boiling point 146 ℃ (419K)
Solubility (water), piperazine is freely soluble in water and ethylene glycol but insoluble in diethyl ether. Piperazine is a weak base and at 25 ℃, its two pKbs are 5.35 and 9.73, respectively. The pH value of the 10% piperazine water solution is 10.8-11.8. Piperazine absorbs water and carbon dioxide in air. Derivatives of piperazine occur in nature and can be synthesized by a variety of methods. For example, the reaction of ammonia alcohol with 1, 2-dichloroethane; or reacting sodium, ethylene glycol and ethylenediamine hydrochloride; or sodium reduces pyrazine in ethanol.
The MDEA, the piperazine, the water and the desulfurization defoaming agent are all commercial products.
The invention takes MDEA as the main part, can undertake almost all the desulfurization task of SCOT tail gas of a sulfur device, and converts H into H2S is reduced to 150mg/m for cultivation. MDEA has proven to be the most suitable desulfurization solvent for refineries, and existing desulfurization units all employ this process.
Introducing high-selectivity piperazine to absorb H only2S, does not absorb CO2. Undertake sulphur device SCOT tail gas H2S is the most difficult task of reducing the speed from 150mg/m to less than 30mg/m through the top-down cultivation. Meanwhile, the solvent and MDEA have the same process conditions and physical adsorption effect, the regenerated poor solvent (not containing acid gas) absorbs acid gas at about 40 ℃ in an absorption tower to become rich solvent, and the rich solvent is desorbed at 125-130 ℃ in a regeneration tower to release H2And the S gas is changed into a lean solvent for recycling.
The newly introduced component has the same stability and oxidation resistance as MDEA, and is suitable for long-period operation of oil refineries.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
the invention takes MDEA as the main agentThe effective desulfurizer fully shows the advantages of large sulfur capacity and good selectivity, and the existence of piperazine has the effect of directing at H2Good S absorption selectivity, fine desulfurization, H2S is reduced to below 30 ppmv;
the technical indexes of the product are as follows:
the product is a light yellow liquid, can be mutually soluble with water, is a non-flammable common liquid, and has the following advantages compared with the conventional desulfurizer in the aspect of difference of service performance:
(1) the special ultralow-emission desulfurization solvent for the SCOT tail gas can run under the existing sulfur recovery device, does not need to change equipment and process parameters, and realizes standard emission;
(2) the SCOT tail gas special ultra-low emission desulfurization solvent runs at high concentration without bubbling, so that the bubble loss in the running process is small, and an evaluation test shows that the foam height of the conventional desulfurizer is 6.5cm, while the product is only 3.8cm under the same simulation condition;
(3) special ultralow-emission desulfurization solvent pair H for SCOT tail gas2High S removing rate and CO removing effect2The removal rate of the catalyst is slightly lower, and evaluation tests show that the catalyst is used for H under the same simulation conditions2Removal rate of S: the conventional desulfurizer is 99.5 percent, while the special ultralow-emission desulfurization solvent for the SCOT tail gas can reach 99.9 percent, and the removal rate of CO2 is as follows: the conventional desulfurizer is 80 percent, and the special ultralow-emission desulfurization solvent for the SCOT tail gas is about 75 percent (v), but the conventional desulfurizer is favorable for the recovery process of sulfur;
(4) the desulfurizer can be mutually soluble with the traditional N-methyldiethanolamine desulfurizer, has synergistic desulfurization effect, good applicability, no corrosion and no influence on the service life of equipment;
in the oil refining petrochemical industry, the desulfurizer is used for removing SCOT tail gas hydrogen sulfide of a sulfur recovery device of a refinery, meets the requirement of GB31570-2015 emission standard, and can also be used for removing H from catalytic dry gas, liquefied gas, hydrogenation dry gas, tail gas and natural gas2S。
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery device of the oil refinery comprises the following components in percentage by mass,
MDEA 95.6%；
2.4% of piperazine;
1.9 percent of water;
0.1 percent of special antifoaming agent for the desulfurizing agent.
The MDEA is N-methyldiethanolamine of which the molecular formula is CH3N(CH2CH2OH)2。
The molecular formula of the piperazine is C4H10N2。
The special antifoaming agent for the desulfurizing agent is modified dimethyl silicone oil.
Adding the MDEA, the piperazine, the water and the special antifoaming agent for the desulfurizing agent into a reaction kettle, and stirring to obtain the special ultralow-emission desulfurizing solvent for the SCOT tail gas of the sulfur recovery device of the oil refinery.
Example 2
The special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery device of the oil refinery comprises the following components in percentage by mass,
MDEA 95.7%；
2.3% of piperazine;
1.8 percent of water;
0.2 percent of special defoamer for desulfurizing agent.
The MDEA is N-methyldiethanolamine of which the molecular formula is CH3N(CH2CH2OH)2。
The molecular formula of the piperazine is C4H10N2。
The special antifoaming agent for the desulfurizing agent is modified dimethyl silicone oil.
Adding the MDEA, the piperazine, the water and the special antifoaming agent for the desulfurizing agent into a reaction kettle, and stirring to obtain the special ultralow-emission desulfurizing solvent for the SCOT tail gas of the sulfur recovery device of the oil refinery.
Example 3
The special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery device of the oil refinery comprises the following components in percentage by mass,
MDEA 95.9%；
2.1% of piperazine;
1.7 percent of water;
0.3 percent of special antifoaming agent for the desulfurizing agent.
The MDEA is N-methyldiethanolamine of which the molecular formula is CH3N(CH2CH2OH)2。
The molecular formula of the piperazine is C4H10N2。
The special antifoaming agent for the desulfurizing agent is modified dimethyl silicone oil.
Adding the MDEA, the piperazine, the water and the special antifoaming agent for the desulfurizing agent into a reaction kettle, and stirring to obtain the special ultralow-emission desulfurizing solvent for the SCOT tail gas of the sulfur recovery device of the oil refinery.
The high-efficiency desulfurizer using MDEA as a main agent fully shows the advantages of large sulfur capacity and good selectivity, and the existence of piperazine has the effect of directing at H2Good S absorption selectivity, fine desulfurization, H2S is reduced to below 30 ppmv; the product is a light yellow liquid, can be mutually soluble with water, is a non-flammable common liquid, and has the following advantages compared with the conventional desulfurizer in the aspect of difference of service performance: (1) the special ultralow-emission desulfurization solvent for the SCOT tail gas can run under the existing sulfur recovery device, does not need to change equipment and process parameters, and realizes standard emission; (2) the SCOT tail gas special-purpose ultralow-emission desulfurization solvent runs under high concentration without foaming, so the foam loss in running is small, and evaluation tests show that the foam height of the conventional desulfurizer is 6.5cm and the product is only 3.8cm under the same simulation conditions; (3) special ultralow-emission desulfurization solvent pair H for SCOT tail gas2High S removal rate and CO removal2Is removed fromThe ratio is slightly lower, and the evaluation test shows that the ratio to H is slightly lower under the same simulation condition2Removal rate of S: the conventional desulfurizer is 99.5 percent, while the special ultralow-emission desulfurization solvent for the SCOT tail gas can reach 99.9 percent, and the removal rate of CO2 is as follows: the conventional desulfurizer is 80 percent, and the special ultralow-emission desulfurization solvent for SCOT tail gas is about 75 percent (v), but the desulfurization solvent is favorable for the recovery process of sulfur; (4) the desulfurizer can be mutually dissolved with the traditional N-methyldiethanolamine desulfurizer, has synergistic desulfurization effect, good applicability, no corrosion and no influence on the service life of equipment; in the oil refining petrochemical industry, the desulfurizer is used for removing SCOT tail gas hydrogen sulfide of a sulfur recovery device of a refinery, meets the requirement of GB31570-2015 emission standard, and can also be used for removing H from catalytic dry gas, liquefied gas, hydrogenation dry gas, tail gas and natural gas2S。
While there have been shown and described what are at present considered to be the preferred embodiments of the present invention, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a special ultralow emission desulfurization solvent of oil refinery sulphur recovery unit SCOT tail gas which characterized in that: comprises the following components in percentage by mass,
MDEA 95.5-96.0%；
1.5 to 2.5 percent of piperazine;
1.5 to 2.5 percent of water;
0.1 to 0.3 percent of defoaming agent special for desulfurizing agent.
2. The special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery unit of the oil refinery according to claim 1, which is characterized in that: the MDEA is N-methyldiethanolamine of which the molecular formula is CH3N(CH2CH2OH)2。
3. The special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery unit of the oil refinery according to claim 1, which is characterized in that: the molecular formula of the piperazine is C4H10N2。
4. The special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery unit of the oil refinery according to claim 1, which is characterized in that: the special antifoaming agent for the desulfurizing agent is modified dimethyl silicone oil.
5. The special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery unit of the oil refinery according to claim 1, which is characterized in that: comprises the following components in percentage by mass,
MDEA 95.8%；
2.0% of piperazine;
2.0 percent of water;
0.2 percent of special antifoaming agent for the desulfurizing agent.
6. The special ultralow-emission desulfurization solvent for the SCOT tail gas of the sulfur recovery unit of the oil refinery according to claim 1, which is characterized in that: the special antifoaming agent for MDEA, piperazine, water and desulfurizer in the claim 1 is added into a reaction kettle to be stirred, and the special ultralow-emission desulfurization solvent for SCOT tail gas of a sulfur recovery device in an oil refinery can be obtained.
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Citations (7)
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| US4336233A (en) * | 1975-11-18 | 1982-06-22 | Basf Aktiengesellschaft | Removal of CO2 and/or H2 S and/or COS from gases containing these constituents |
| US4710362A (en) * | 1986-05-05 | 1987-12-01 | Texaco Inc. | Selective recovery of carbon dioxide |
| CN101264413A (en) * | 2008-04-30 | 2008-09-17 | 王胜利 | Total sulfides removing solvent and preparation thereof |
| CN103157348A (en) * | 2013-04-03 | 2013-06-19 | 江苏创新石化有限公司 | High efficient desulfurizing agent with low energy consumption |
| CN105498450A (en) * | 2014-10-14 | 2016-04-20 | 中国石油化工股份有限公司 | Desulfurization absorption liquid capable of saving energy and reducing consumption |
| US20190126194A1 (en) * | 2016-06-10 | 2019-05-02 | Basf Se | Cyclohexanediamines for use in gas scrubbing |
| CN111054198A (en) * | 2018-10-16 | 2020-04-24 | 上海赛思特新能源科技有限公司 | Compound desulfurizer and preparation method thereof |
-
2022
- 2022-01-25 CN CN202210082902.9A patent/CN114452777A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4336233A (en) * | 1975-11-18 | 1982-06-22 | Basf Aktiengesellschaft | Removal of CO2 and/or H2 S and/or COS from gases containing these constituents |
| US4710362A (en) * | 1986-05-05 | 1987-12-01 | Texaco Inc. | Selective recovery of carbon dioxide |
| CN101264413A (en) * | 2008-04-30 | 2008-09-17 | 王胜利 | Total sulfides removing solvent and preparation thereof |
| CN103157348A (en) * | 2013-04-03 | 2013-06-19 | 江苏创新石化有限公司 | High efficient desulfurizing agent with low energy consumption |
| CN105498450A (en) * | 2014-10-14 | 2016-04-20 | 中国石油化工股份有限公司 | Desulfurization absorption liquid capable of saving energy and reducing consumption |
| US20190126194A1 (en) * | 2016-06-10 | 2019-05-02 | Basf Se | Cyclohexanediamines for use in gas scrubbing |
| CN111054198A (en) * | 2018-10-16 | 2020-04-24 | 上海赛思特新能源科技有限公司 | Compound desulfurizer and preparation method thereof |
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