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Highly selective desulfurization solvent and preparation method thereof

A high-selectivity, desulfurization accelerator technology, applied in the field of desulfurization, can solve the problems of low hydrogen sulfide removal selectivity and high energy consumption of solvent desulfurization system, and achieve the effects of reducing energy consumption, reducing energy consumption, and improving selectivity

Active Publication Date: 2014-01-29
PANJIN XINANYUAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the compound type desulfurization solvent with N-methyldiethanolamine as the main component in the prior art has low selectivity for removing hydrogen sulfide when processing raw materials with high carbon-sulfur ratio. The energy consumption of the desulfurization system is high, thereby providing a highly selective desulfurization solvent and its preparation method

Method used

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Embodiment 1

[0025] The highly selective desulfurization solvent described in this embodiment has a raw material composition as follows:

[0026] Triethanolamine, 30g;

[0027] N-methyl-diethanolamine, 45g;

[0028] N-Hydroxyethylpiperazine, 23g;

[0029] Desulfurization accelerator butyric acid, 2g;

[0030] The antifoaming agent is simethicone oil, 0.01g.

[0031] The preparation method of the highly selective desulfurization solvent of the present invention, it comprises the following steps:

[0032] (1) Weighing triethanolamine, N-methyl-diethanolamine and N-hydroxyethylpiperazine as organic amine components into the reaction kettle according to the above mass, raising the temperature to 35° C., and mixing and stirring for 10 minutes;

[0033] (2) Weigh the desulfurization accelerator and defoamer according to the above mass, add them to the organic amine component in step (1), and mix them uniformly to obtain the desulfurization solvent.

Embodiment 2

[0035] The highly selective desulfurization solvent described in this embodiment has a raw material composition as follows:

[0036] Triethanolamine, 50g;

[0037] N-methyl-diethanolamine, 30g;

[0038] N-Hydroxyethylpiperazine, 17.5g;

[0039] The desulfurization accelerator is acetic acid, 2.5g;

[0040] The antifoaming agent is polypropylene glycol monobutyl ether, 0.01g.

[0041] The preparation method of the highly selective desulfurization solvent of the present invention, it comprises the following steps:

[0042] (1) Weighing triethanolamine, N-methyl-diethanolamine and N-hydroxyethylpiperazine as organic amine components into the reaction kettle according to the above mass, raising the temperature to 35° C., and mixing and stirring for 10 minutes;

[0043](2) Weigh the desulfurization accelerator and defoamer according to the above mass, add them to the organic amine component in step (1), and mix uniformly to obtain the desulfurization solvent.

Embodiment 3

[0045] The highly selective desulfurization solvent described in this embodiment has a raw material composition as follows:

[0046] Triethanolamine, 70g;

[0047] N-methyl-diethanolamine, 18g;

[0048] N-hydroxyethylpiperazine, 10g;

[0049] The desulfurization accelerator is phosphoric acid, 2g;

[0050] The defoaming agent is polypropylene glycol monobutyl ether, 0.005g.

[0051] The preparation method of the highly selective desulfurization solvent of the present invention, it comprises the following steps:

[0052] (1) Weighing triethanolamine, N-methyl-diethanolamine and N-hydroxyethylpiperazine as organic amine components into the reaction kettle according to the above mass, raising the temperature to 35° C., and mixing and stirring for 10 minutes;

[0053] (2) Weigh the desulfurization accelerator and defoamer according to the above mass, add them to the organic amine component in step (1), and mix uniformly to obtain the desulfurization solvent.

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Abstract

The invention relates to a highly selective desulfurization solvent. The highly selective desulfurization solvent is at least prepared from the raw materials: an organic amine component which is taken as a main component and consists of triethanolamine in a monoamine type, N-methyl-diethanolamine and N-hydroxyethyl piperazine in a diamines type as well as a mixed additive component consisting of a desulfurization accelerator and a defoamer, so that as the desulfurization solvent contains the organic amine component consisting of the triethanolamine, the N-methyl-diethanolamine and the N-hydroxyethyl piperazine, supplemented by the mixed additive component consisting of the desulfurization accelerator and the defoamer, by virtue of the synergistic effect among the components, when being used for treating a mixed raw gas with high carbon-sulfur ratio, the desulfurization solvent is relatively high in the selectivity for removing sulfuretted hydrogen and can be used for effectively lowering the energy consumption of a desulfurization system.

Description

technical field [0001] The invention relates to a highly selective desulfurization solvent and a preparation method thereof, in particular to a highly selective desulfurization solvent for removing hydrogen sulfide and a preparation method thereof, belonging to the technical field of desulfurization. Background technique [0002] Natural gas, oilfield associated gas, refinery gas, synthesis gas and other industrial gas streams all contain a certain amount of CO 2 , inorganic sulfur such as H 2 S, and organic sulfur such as COS, CS 2 , Methyl mercaptan, ethanethiol and propanethiol etc. Among them, inorganic sulfur H 2 S and organic sulfur such as COS, CS 2 The existence of sulfides such as sulfide and RSH not only seriously threatens personal safety, but also leads to poisoning and deactivation of various catalysts in the subsequent production process. In addition, because the above-mentioned sulfides are acidic, they will cause corrosion to equipment and pipelines. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 李海生臧维良唐治钫薛国强王继新
Owner PANJIN XINANYUAN CHEM IND
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