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Method for preparing catalyst for converting mercaptan in liquefied gas

A technology of catalyst and liquefied gas, applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, catalyst carrier, etc. Solvent and other problems, to achieve the effect of improving the regeneration efficiency of lye, saving start-up time, and good oxidation effect

Active Publication Date: 2007-03-28
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this process are: the sulfonated cobalt phthalocyanine catalyst is easy to aggregate and deactivate in the alkali phase; when the liquefied gas is extracted with the alkali solution containing the catalyst, the generated sodium mercaptide is easy to generate disulfide immediately However, it is brought into the refined liquefied gas products to reduce the effect of total sulfur removal; the waste lye containing catalyst discharged from the device from time to time is extremely difficult to handle, and the pressure on environmental protection is great
[0003] Chinese patent CN1632072A discloses a combination device for alkali extraction of light oil agent-fixed bed catalytic oxidation sweetening. The fixed bed catalyst used in the device has high activity and certain desulfurization effect, but the patent does not The preparation method of the catalyst is not disclosed, and the solvent used in the preparation is not disclosed

Method used

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  • Method for preparing catalyst for converting mercaptan in liquefied gas

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Experimental program
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Effect test

Embodiment 1

[0011] The method of the present embodiment has the following steps:

[0012] ①Activation of the carrier: The activated carbon is placed at 180°C for 10 hours to obtain an activated carrier;

[0013] 2. dissolving the active component in the solvent: dissolving the active component of 0.25 g polyphthalocyanine cobalt catalyst in a mixed solvent compounded by 28 wt% ammonia water and N,N-dimethylformamide in a ratio of 6:1;

[0014] ③ Impregnation of the carrier: Take 50 grams of activated carbon activated in step ①, add it to 100 ml of the solution obtained in step ② and soak for 24 hours to obtain a mixed material;

[0015] ④ Filtration and drying: filter out the carrier from the mixed material obtained in step ③, and dry the carrier at a temperature of 120° C. for 5 hours to obtain the catalyst C1 of the present invention.

Embodiment 2

[0017] The method of the present embodiment has the following steps:

[0018] ①Activation of the carrier: the α-Al 2 o 3 Placed at 180°C for 8 hours to obtain an activated carrier;

[0019] ②The active component is dissolved in a solvent: 0.6 g of quaternary ammonium alkalized cobalt phthalocyanine catalyst active component is dissolved in N,N-dimethylformamide;

[0020] ③ Impregnation of the carrier: take the activated α-Al in step ① 2 o 3 100 grams, added to 200 milliliters of the solution obtained in step ② and soaked for 48 hours to obtain a mixed material;

[0021] ④ Filtration and drying: filter out the carrier from the mixture obtained in step ③, and dry the carrier at 160° C. for 5 hours to obtain the catalyst C2 of the present invention.

Embodiment 3

[0023] The method of the present embodiment has the following steps:

[0024] ①Activation of the carrier: the α-Al 2 o 3 Placed at 220°C for 10 hours to obtain an activated carrier;

[0025] ② Dissolving the active component in a solvent: dissolving 0.3 g of the active component of the polyphthalocyanine cobalt catalyst in a mixed solvent compounded by aliphatic amine and N,N-dimethylformamide at a ratio of 1:1;

[0026] ③ Impregnation of the carrier: take the activated α-Al in step ① 2 o 3 50 grams, added to 120 milliliters of the solution obtained in step ② and soaked for 6 hours to obtain a mixed material;

[0027] ④ Filtration and drying: filter out the carrier from the mixed material obtained in step ③, and dry the carrier at 140° C. for 7 hours to obtain the catalyst C3 of the present invention.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/16B01J31/28B01J32/00C10L3/12
Inventor 夏道宏张杰项玉芝王玉海杜伟
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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