A kind of high-efficiency compound desulfurization and decarburization solvent and its application

Abstract

The invention discloses an efficient compound desulfurizing decarbonizing solvent which comprises the following components by weight percent: 60-85% of serotonin, 3-20% of activating agent, 10-30% of physical solvent, 0.01-0.2% of de-foaming agent, 0.5-2% of antioxidant and 0.5-2% of corrosion inhibitor. The efficient compound desulfurizing decarbonizing solvent provided by the invention is capable of simultaneously removing acidic gas and organic sulfide in the mixed gas, has the advantages of high acid gas load, low sulfur content in purified gas, stable solvent performance, recycling property, no corrosion to equipment, and the like, can be used for removing the acidic gas and organic sulfide in the gases, such as, natural gas, petroleum refinery gas, synthesis gas and liquefied petroleum gas, and has an excellent popularizing effect.

Description

technical field

[0001] The invention belongs to the technical field of environmental protection and gas purification, relates to the technology of separating acid gas from mixed gas, more specifically, relates to a method for removing hydrogen sulfide (H2S) from mixed gas 2 S), carbon dioxide (CO 2 ) and organic sulfide high-efficiency compound desulfurization and decarburization solvent and its application. Background technique

[0002] Mixed gas mainly includes natural gas, petroleum refinery gas, synthesis gas, liquefied petroleum gas and other gases. Natural gas, synthetic gas, petroleum refinery gas and other industrial gases usually contain hydrogen sulfide (H 2 S), carbon dioxide (CO 2 ) and organic sulfides. Organic sulfides mainly include carbonyl sulfide, carbon disulfide, and sulfides such as mercaptans and sulfides with different carbon numbers. These large amounts of organic sulfide components not only cause corrosion of equipment and pipelines during mining...

Examples

Embodiment 1

[0043] In terms of mass percentage, the high-efficiency composite desulfurization and decarburization solvent of the present embodiment includes the following components: 50% of N-methyldiethanolamine, N-[4-(methylamino)-3-nitrophenyl]diethanolamine 22.39% %, N-benzhydrylazetidin-3-ol 10%, 3-n-octyloxytetramethylene sulfone 10%, 4-(3-azidine)-2,2-dimethyl Morpholine 6%, polyether modified silicone oil 0.01%, tea polyphenol 0.6%, 2-amino-imidazolinone 1%.

[0044] The composite desulfurization and decarburization solvent is diluted with water and formulated into a solution with a mass concentration of 40%, which is used for feed gas composition including low-carbon hydrocarbons 89.5mole%, H 2 S 4.2mole%, CO 2 Gas purification of 6.24mole%, 226ppm methyl mercaptan, 148ppm ethanethiol, 41ppm isopropyl mercaptan, etc., wherein the raw material gas composition is calculated by volume percentage, and the H in the purified gas 2 S is 10ppm, CO 2 is 2.2v%, the organic sulfide is 9...

Embodiment 2

[0047] In terms of mass percentage, the high-efficiency composite desulfurization and decarburization solvent of the present embodiment includes the following components: 45% of N-methyldiethanolamine, N-[4-(methylamino)-3-nitrophenyl]diethanolamine 22% %, 1-cyclohexyl-3-azidine alcohol 10.39%, 3-n-octyloxytetramethylene sulfone 15%, 4-(3-azidine)-2,2-dimethylmorpholine 6 %, polyether modified silicone oil 0.01%, tea polyphenol 0.5%, 2-amino-imidazolinone 1.1%.

[0048] The composite desulfurization and decarburization solvent is diluted with water and formulated into a solution with a mass concentration of 45%, which is used for raw material gas composition including low-carbon hydrocarbons 90.1mole%, H 2 S 4.4mole%, CO 2 5.45mole%, methyl mercaptan 258ppm, ethanethiol 191ppm, isopropyl mercaptan 53ppm, etc., where the composition of the raw material gas is calculated by volume percentage, and the H in the purified gas 2 S is 9ppm, CO 2 is 2.2v%, the organic sulfide is 94...

Embodiment 3

[0051] In terms of mass percentage, the high-efficiency composite desulfurization and decarburization solvent of the present embodiment includes the following components: 43% of N-methyldiethanolamine, 15% of N-[4-(methylamino)-3-nitrophenyl]diethanolamine %, 1-cyclohexyl-3-azidine alcohol 10.39%, 3-isooctyloxytetramethylene sulfone 20%, 4-(3-azidine)-2,2-dimethylmorpholine 10 %, polyether modified silicone oil 0.01%, thiodipropionic acid 0.5%, di(propynyloxymethyl)isopropylbenzyl ammonium chloride 1.1%.

[0052] The composite desulfurization and decarburization solvent is diluted with water and formulated into a solution with a mass concentration of 50%, which is used for feed gas composition including low-carbon hydrocarbons 89.5mole%, H 2 S 4.2mole%, CO 2 6.24mole%, 258ppm of methyl mercaptan, 191ppm of ethanethiol, 53ppm of isopropyl mercaptan, etc., where the raw material gas composition is calculated by volume percentage, and the H in the purified gas 2 S is 10ppm, CO...

technical field

[0001] The invention belongs to the technical field of environmental protection and gas purification, relates to the technology of separating acid gas from mixed gas, more specifically, relates to a method for removing hydrogen sulfide (H2S) from mixed gas 2 S), carbon dioxide (CO 2 ) and organic sulfide high-efficiency compound desulfurization and decarburization solvent and its application. Background technique

[0002] Mixed gas mainly includes natural gas, petroleum refinery gas, synthesis gas, liquefied petroleum gas and other gases. Natural gas, synthetic gas, petroleum refinery gas and other industrial gases usually contain hydrogen sulfide (H 2 S), carbon dioxide (CO 2 ) and organic sulfides. Organic sulfides mainly include carbonyl sulfide, carbon disulfide, and sulfides such as mercaptans and sulfides with different carbon numbers. These large amounts of organic sulfide components not only cause corrosion of equipment and pipelines during mining...

Examples

Embodiment 1

[0043] In terms of mass percentage, the high-efficiency composite desulfurization and decarburization solvent of the present embodiment includes the following components: 50% of N-methyldiethanolamine, N-[4-(methylamino)-3-nitrophenyl]diethanolamine 22.39% %, N-benzhydrylazetidin-3-ol 10%, 3-n-octyloxytetramethylene sulfone 10%, 4-(3-azidine)-2,2-dimethyl Morpholine 6%, polyether modified silicone oil 0.01%, tea polyphenol 0.6%, 2-amino-imidazolinone 1%.

[0044] The composite desulfurization and decarburization solvent is diluted with water and formulated into a solution with a mass concentration of 40%, which is used for feed gas composition including low-carbon hydrocarbons 89.5mole%, H 2 S 4.2mole%, CO 2 Gas purification of 6.24mole%, 226ppm methyl mercaptan, 148ppm ethanethiol, 41ppm isopropyl mercaptan, etc., wherein the raw material gas composition is calculated by volume percentage, and the H in the purified gas 2 S is 10ppm, CO 2 is 2.2v%, the organic sulfide is 9...

Embodiment 2

[0047] In terms of mass percentage, the high-efficiency composite desulfurization and decarburization solvent of the present embodiment includes the following components: 45% of N-methyldiethanolamine, N-[4-(methylamino)-3-nitrophenyl]diethanolamine 22% %, 1-cyclohexyl-3-azidine alcohol 10.39%, 3-n-octyloxytetramethylene sulfone 15%, 4-(3-azidine)-2,2-dimethylmorpholine 6 %, polyether modified silicone oil 0.01%, tea polyphenol 0.5%, 2-amino-imidazolinone 1.1%.

[0048] The composite desulfurization and decarburization solvent is diluted with water and formulated into a solution with a mass concentration of 45%, which is used for raw material gas composition including low-carbon hydrocarbons 90.1mole%, H 2 S 4.4mole%, CO 2 5.45mole%, methyl mercaptan 258ppm, ethanethiol 191ppm, isopropyl mercaptan 53ppm, etc., where the composition of the raw material gas is calculated by volume percentage, and the H in the purified gas 2 S is 9ppm, CO 2 is 2.2v%, the organic sulfide is 94...

Embodiment 3

[0051] In terms of mass percentage, the high-efficiency composite desulfurization and decarburization solvent of the present embodiment includes the following components: 43% of N-methyldiethanolamine, 15% of N-[4-(methylamino)-3-nitrophenyl]diethanolamine %, 1-cyclohexyl-3-azidine alcohol 10.39%, 3-isooctyloxytetramethylene sulfone 20%, 4-(3-azidine)-2,2-dimethylmorpholine 10 %, polyether modified silicone oil 0.01%, thiodipropionic acid 0.5%, di(propynyloxymethyl)isopropylbenzyl ammonium chloride 1.1%.

[0052] The composite desulfurization and decarburization solvent is diluted with water and formulated into a solution with a mass concentration of 50%, which is used for feed gas composition including low-carbon hydrocarbons 89.5mole%, H 2 S 4.2mole%, CO 2 6.24mole%, 258ppm of methyl mercaptan, 191ppm of ethanethiol, 53ppm of isopropyl mercaptan, etc., where the raw material gas composition is calculated by volume percentage, and the H in the purified gas 2 S is 10ppm, CO...

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