Compound sulphur dispersing agent for complex iron desulphurization solution
A technology of desulfurization solution and dispersant, which is applied in the preparation/purification of sulfur, separation method, and separation of dispersed particles, etc. It can solve the problems of reduced increasing capacity and inability to effectively gather and settle sulfur particles, and achieve good fluidity and no desulfurization effect. Effect, easy to settle effect
Active Publication Date: 2013-10-16
PETROCHINA CO LTD
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Problems solved by technology
[0005] In the above methods, only nonionic surfactants are added to increase the size of sulfur particles generated in the reaction process. When the pH of the solution increases, the ability of these nonionic surfactants to increase the particle size of sulfur particles decreases, resulting in the formation of sulfur particles. Particles cannot effectively aggregate and settle
Method used
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Embodiment 1
[0025] The sulfur dispersant test was carried out in the complex iron solution at pH=8.5, and the performance of the sulfur dispersant was evaluated by the size of the generated sulfur particles. The size of the sulfur particles was analyzed by a laser particle size analyzer. The specific test conditions are shown in Table 1:
[0026] Table I:
[0027]
Embodiment 2
[0029] The sulfur dispersant test was carried out in the complex iron solution at pH=9, and the performance of the sulfur dispersant was evaluated by the size of the generated sulfur particles, which were analyzed by a laser particle size analyzer. The specific experimental conditions are shown in Table 2:
[0030] Table II:
[0031]
Embodiment 3
[0033] The sulfur dispersant test was carried out in the complex iron solution at pH=10, and the performance of the sulfur dispersant was evaluated by the size of the generated sulfur particles. The size of the sulfur particles was analyzed by a laser particle size analyzer. The specific experimental conditions are shown in Table 3
[0034] Table three:
[0035]
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The invention relates to a compound sulphur dispersing agent for a complex iron desulphurization solution. The compound sulphur dispersing agent comprises multiple-carbon macro-molecular carbohydrates, alkylphenol polyoxyethylene, dipropyl amine and an aqueous solution of thiosulfate, wherein, the content of multiple-carbon macro-molecular carbohydrates in the compound sulphur dispersing agent is 5 to 12 g / L, the content of alkylphenol polyoxyethylene in the compound sulphur dispersing agent is 15 to 30 g / L, the content of dipropyl amine is 3 to 10 g / L, and the concentration of thiosulfate ions in the aqueous solution of thiosulfate is 0.2 to 0.8 mol / L. The dispersing agent is applicable to a desulphurization solution having a wide pH value range, can change surface properties of sulphur produced in the complex iron desulphurization solution and enables produced sulphur particles to have a particle size increased from 1 mu m to above 50 mu m, to be easy to settle and to have good fluidity; the addition of the compound sulphur dispersing agent has no influence on the desulphurization effect of the desulphurization solution.
Description
Technical field: [0001] The invention belongs to the technical field of gas processing, and more specifically relates to 2 Removal of H from S gas 2 S and convert it into sulfur particles for sedimentation and separation. Background technique: [0002] The Lo-Cat complexed iron desulfurization technology owned by American Filtration Company, and the SulFerox complexed iron desulfurization process jointly owned by shell and Dow, the sulfur modifier used in the desulfurization series solutions is a straight-chain alkoxy alcohol used for The size of sulfur particles was increased, but when the pH value of the desulfurization solution increased, the particle size of sulfur particles did not increase significantly. [0003] Patent US4402930 discloses a method for cyclically removing hydrogen sulfide and carbon dioxide in various gas streams. n h 2n+1 After contacting a small amount of monoalcohol crystal modifier with the general formula OH (n=4-18), the sulfur element in the...
Claims
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Login to View More IPC IPC(8): B01D53/78B01D53/52C01B17/05
Inventor 闫琛洋张伍涂彦黄黎明常宏岗温崇荣何金龙
Owner PETROCHINA CO LTD