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Composite desulfurization agent and preparation method thereof

A desulfurizer and composite technology, which is applied in the processing of gas mixtures, petroleum industry, and hydrocarbon oil treatment, etc., to reduce the probability of thermally stable salts, suppress foaming, and prolong service life.

Inactive Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is no good stabilizer introduced, the problem that the current amine liquid is easy to decompose to form a thermally stable salt has not been solved

Method used

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  • Composite desulfurization agent and preparation method thereof
  • Composite desulfurization agent and preparation method thereof
  • Composite desulfurization agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw material gross mass is 1 ton, and the raw material composition is as follows, by weight percentage:

[0030]

[0031]

[0032] N-methyldiethanolamine, tertiary aminopolypropylene glycol ether, and diethylethanolamine are mixed into a mixing tank according to the weight percentage and mixed and stirred for 20 minutes, and then ammonium molybdate, tertiary aminoorganosiloxane, and thiol dimethyl Tin, after using the circulation pump to circulate and return for 60 minutes, put it into the low-pressure desulfurization system with a pressure of 8KPAg, the cycle time is more than 5000 hours, and the sample is taken every eight hours. The sulfur content of the purified gas is measured to be below 5ppm, the carbon dioxide is not removed, and the energy consumption of the device is reduced. 37%, the composite desulfurizer has a good effect.

Embodiment 2

[0034] The raw material gross mass is 1 ton, and the raw material composition is as follows, by weight percentage:

[0035]

[0036] N-methyldiethanolamine, tertiary aminopolypropylene glycol ether, N-(2-hydroxybutyl)-1,2-propylenediamine are mixed into the mixing tank according to the weight percentage and mixed and stirred for 30min, and then ammonium tungstate, The tertiary amino organosiloxane and dimethyl tin mercaptide were circulated and refluxed for 40 minutes by a circulation pump, put into a low-pressure desulfurization system with a pressure of 7KPAg, and the cycle life was more than 5,500 hours. Samples were taken every eight hours, and the sulfur content of the purified gas was measured to be 5ppm Below, the carbon dioxide is not removed, and the energy consumption of the device is reduced by 35%. The use effect of this composite desulfurizer is good.

Embodiment 3

[0038] The raw material gross mass is 1 ton, and the raw material composition is as follows, by weight percentage:

[0039]

[0040] N-methyldiethanolamine, tertiary aminopolypropylene glycol ether, and 4-methylmorpholine were put into a mixing tank according to weight percentage and mixed and stirred for 30 minutes, then polyphosphate amine, tertiary aminoorganosiloxane, mercaptan Methyl tin, using a circulating pump to circulate back for 50 minutes, put into a low-pressure desulfurization system with a pressure of 10KPAg, the cycle life is more than 5,500 hours, and the sample is taken every eight hours. The sulfur content of the purified gas is measured to be below 5ppm, and the carbon dioxide is not removed. The energy consumption of the device 33% reduction, the composite desulfurizer works well.

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Abstract

The present invention belongs to the field of refinery gas desulfurization, and particularly relates to a composite desulfurization agent and a preparation method thereof, wherein the composite desulfurization agent is prepared from the following raw materials by weight: 30-40% of N-methyl diethanolamine, 30-40% of sterically hindered amine, 20-30% of a stabilizer, 0.5-1.0% of a corrosion inhibitor, 0.5-1.0% of a defoaming agent, and 0.03-0.04% of dimethyl tin mercaptide. According to the present invention, the removal effects of organic sulfur and inorganic sulfur are ensured, the service life of the amine liquid is effectively prolonged, the amine liquid forming period is prolonged, the amine liquid service life is increased, the amine liquid circulation amount is reduced, and the energy consumption of the apparatus is saved by more than or equal to 35%.

Description

technical field [0001] The invention belongs to the field of refinery gas desulfurization, and in particular relates to a composite desulfurizer and a preparation method thereof. Background technique [0002] Natural gas and refinery gas contain carbon dioxide, sulfur dioxide, hydrogen sulfide, mercaptans and sulfides, etc. The combustion of sulfides will generate sulfur dioxide and sulfur trioxide, so natural gas and refinery gas must be desulfurized. [0003] Desulfurization solvents such as monoethanolamine (MEA), diisopropanolamine (DIPA) and diethanolamine (DEA) have been used in refinery gas desulfurization. MEA and DEA vs. CO 2 / H 2 O is poor in selectivity, prone to thermal and chemical degradation, and the solvent is prone to foaming and strong corrosion. In view of the shortcomings of the above traditional desulfurization solvents, the selective desulfurization agent methyldiethanolamine (MDEA) solution was used as a desulfurization agent at home and abroad afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G70/00
Inventor 杨忠梅付静吕爱梅孟宪谭何宗华侯磊朱相春
Owner CHINA PETROLEUM & CHEM CORP
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