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Method for preparing mercaptan conversion catalyst of liquefied petroleum gas

A liquefied petroleum gas and catalyst technology, which is applied in the field of petroleum processing, can solve problems such as poor solubility, and achieve the effects of preventing solvent volatilization, large processing capacity, and low mercaptan content

Inactive Publication Date: 2015-09-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor solubility of cobalt phthalocyanine compounds in solvents during the preparation of liquefied petroleum gas mercaptan conversion catalysts, and thus provide a catalyst for liquefied petroleum gas mercaptan conversion with short preparation time and high catalytic activity method

Method used

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  • Method for preparing mercaptan conversion catalyst of liquefied petroleum gas
  • Method for preparing mercaptan conversion catalyst of liquefied petroleum gas

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Activation of the carrier, placing the 13X molecular sieve at 450° C. for 5 hours to obtain an activated carrier;

[0026] (2) The active component is dissolved in a solvent, and 0.1 gram of quaternary ammonium alkalized cobalt phthalocyanine catalyst active component is dissolved in 50 ml by 1 wt % ammonia and N,N-dimethylformamide in a volume ratio of 1:1 The impregnation solution is obtained in the compounded mixed solvent;

[0027] (3) Impregnation of the carrier, get 20 grams of activated 13X molecular sieves in step (1), add to the impregnating solution of 50 milliliters of step (2) to obtain the mixed material, seal the mixed material, and put it under ultrasonic power Under the conditions of 300W and ultrasonic frequency of 40kHz, continuous ultrasonic impregnation for 1 hour;

[0028] (4) Filter and dry, filter out the carrier from the mixture obtained in step (3), and dry the carrier at a vacuum of 0.08 MPa and a temperature of 120° C. for 5 hours to obta...

Embodiment 2

[0030] (1) Activation of the carrier, placing the USY molecular sieve at 600°C for 3 hours to obtain an activated carrier;

[0031] (2) The active component is dissolved in a solvent, and 0.08 gram of sulfonated cobalt phthalocyanine catalyst active component is dissolved in 40ml by volume ratio 1: 1:1 mixed solvent to obtain the impregnating solution;

[0032] (3) Impregnation of the carrier: Take 10 grams of the activated USY molecular sieve in step (1), add it to 40 milliliters of the impregnation solution obtained in step (2) to obtain the mixed material, seal the mixed material, and place it in the ultrasonic Under the conditions of power of 100W and ultrasonic frequency of 60kHz, continuous ultrasonic impregnation for 1.5 hours;

[0033] (4) Filtration and drying: filter out the carrier from the mixed material obtained in step (3), and dry the carrier at a vacuum of 0.09 MPa and a temperature of 80°C for 8 hours to obtain the catalyst C2 of the present invention.

Embodiment 3

[0035] (1) Activation of the carrier, placing Al2O3 at 150°C for 30 hours to obtain an activated carrier;

[0036] (2) Dissolving the active component in a solvent, dissolving 0.1 gram of the polyphthalocyanine cobalt catalyst active component in 40 ml of a mixed solvent compounded by ethanolamine and fatty alcohol in a volume ratio of 3:1 to obtain an impregnation solution;

[0037] (3) Impregnation of the carrier: get 20 grams of activated Al in the step (1) O , join in the impregnating solution of 40 milliliters of steps (2) to obtain the mixed material, the mixed material is sealed, and it is in ultrasonic power Under the conditions of 200W and ultrasonic frequency of 50kHz, continuous ultrasonic impregnation for 3 hours;

[0038] (4) Filter and dry, filter out the carrier from the mixed material obtained in step (3), and dry the carrier at a vacuum of 0.05 MPa and a temperature of 65° C. for 3 hours to obtain the catalyst C3 of the present invention.

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Abstract

The present invention discloses a method for preparing the mercaptan conversion catalyst of a liquefied petroleum gas, which comprises the steps of activating a carrier; preparing a steeping liquor comprising CoTSPc compounds and a steeping solvent; dipping the activated carrier in the steeping solvent to obtain a mixed material; sealing the mixed material and subjecting the mixed material to the ultrasonic treatment; filtering a loaded carrier out of the mixed material after the ultrasonic treatment, and drying the loaded carrier in the vacuum state to obtain the mercaptan conversion catalyst of the liquefied petroleum gas. According to the preparation method, the solubility of CoTSPc compound molecules in the steeping solvent is improved under the ultrasonic effect. Meanwhile, the diffusion and adsorption process of the CoTSPc compound molecules in the carrier is accelerated, so that active components can quickly and effectively get into the pore canals of the carrier. Therefore, the loading homogeneity and the loading sufficiency are ensured. Meanwhile, the loading effect of the CoTSPc compound molecules served as active components on the carrier can be facilitated. The dipping time is greatly shortened, and the concentration of the steeping solvent is ensured. The preparation efficiency of the catalyst is improved, and the production cost thereof is reduced.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst used for mercaptan conversion in liquefied petroleum gas, and belongs to the field of petroleum processing. Background technique [0002] Like oil and natural gas, liquefied petroleum gas is a fossil fuel and a by-product obtained from crude oil catalytic cracking and thermal cracking in refineries. Its main components are butene, propylene, butane and propane, and contain a small amount of pentane, Pentenes and trace sulfide impurities, among which mercaptans are one of the sulfide impurities, currently in liquefied petroleum gas sweetening equipment, generally use Merox extraction-liquid phase catalytic oxidation process or fiber membrane sweetening process, The principle is to add a small amount of sulfonated cobalt phthalocyanine or cobalt polyphthalocyanine catalyst into the aqueous sodium hydroxide solution and dissolve it, and use thi...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/22C10L3/12
Inventor 夏道宏陈际海朱丽君项玉芝周玉路
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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