Method for preparing catalyst for converting mercaptan in liquefied gas

Abstract

The present invention discloses a preparation method of catalyst for converting mercaptan contained in the liquefied gas. Said method has the following steps: (1), activation of carrier; (2), dissolving active component in the solvent, the described active component is phthalocyanine cobalt compound, the described solvent is simple organic solvent or organic mixed solvent or organic-inorganic mixed solvent; (3), soaking the carrier activated in step 1 in the solution obtained by step 2 so as to obtain a mixed material; and (4), making the carrier be filtered out from the mixed material obtained in the step 3, drying said carrier so as to obtain the invented catalyst.

Description

technical field

[0001] The invention belongs to the field of petroleum processing, and in particular relates to a preparation method of a catalyst for converting mercaptan contained in liquefied gas. Background technique

[0002] The existing liquefied gas sweetening device generally adopts the Merox extraction-liquid-phase catalytic oxidation process. The principle is to add a small amount of sulfonated cobalt phthalocyanine or polyphthalocyanine cobalt The liquid is the extraction solvent, so that the mercaptans in the liquefied gas are extracted into the extraction liquid, and then the air is passed into the extraction liquid. Under the action of the catalyst and the air, the mercaptans in the extraction liquid The sodium is converted to disulfide and regenerates the lye and catalyst. Because the generated disulfide is not dissolved in the lye, the disulfide can be separated, and the lye can be recycled at the same time. The main disadvantages of this process are: the s...

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