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A kind of preparation method of liquefied petroleum gas oxidation desulfurizer

A technology of oxidative desulfurization agent and liquefied petroleum gas, which is applied in chemical instruments and methods, petroleum industry, refining with halogen compounds, etc. It can solve the problems of difficult removal of organic sulfides, increased pressure on environmental protection, and easy deactivation of cobalt phthalocyanine catalysts, etc. problem, to achieve strong absorption effect, low cost and remarkable sulfur removal effect

Active Publication Date: 2020-12-11
ANHUI HAIDE PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the cobalt phthalocyanine catalyst is easily deactivated, and the catalyst needs to be replaced frequently. In the process, caustic soda is used to aggravate the environmental protection pressure. Later, the technology has been improved, and ammonia water is used instead of caustic soda, but the gas device is increased accordingly, and due to Ammonia water is weakly alkaline, and some organic sulfides are difficult to completely remove

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of desulfurizer:

[0023] (1) Activation of silica gel: add 30 parts of nitric acid to 30 parts of silica gel, heat and reflux for 5 hours, wash with distilled water until neutral, seal and place, then soak in 6N hydrochloric acid at room temperature for 24 hours, then wash with distilled water until neutral , and then dry the treated silica gel in a horse boiling furnace at 120°C for 10 hours to obtain activated silica gel;

[0024] (2) Modification of silica gel: add activated silica gel to absolute ethanol, heat to reflux state, keep warm and stir for 10-30min, then add 6 parts of glycolic acid and 6 parts of silane coupling agent, reflux and stir for 2 hours, and naturally cool to After filtering at room temperature, the obtained silica gel was added with 3% sodium carbonate of silica gel quality and stirred evenly, sealed at 3°C ​​and left for 2 hours to obtain modified silica gel;

[0025] (3) Loading of silica gel: add the modified silica gel to deio...

Embodiment 2

[0028] Preparation of desulfurizer:

[0029] (1) Activation of silica gel: Add 35 parts of nitric acid to 35 parts of silica gel, heat and reflux for 5 hours, wash with distilled water until neutral, seal and place, then soak in 6N hydrochloric acid at room temperature for 24 hours, then wash with distilled water until neutral , and then dry the treated silica gel in a horse boiling furnace at 120°C for 10 hours to obtain activated silica gel;

[0030] (2) Modification of silica gel: add activated silica gel to absolute ethanol, heat to reflux state, keep warm and stir for 10-30min, then add 6 parts of glycolic acid and 6 parts of silane coupling agent, reflux and stir for 2 hours, and naturally cool to After filtering at room temperature, the obtained silica gel was added with 3% sodium carbonate of silica gel quality and stirred evenly, sealed at 3°C ​​and left for 2 hours to obtain modified silica gel;

[0031] (3) Loading of silica gel: add the modified silica gel to deio...

Embodiment 3

[0057] Based on Example 1, set up Comparative Example 1 without adding glycolic acid, Comparative Example 2 without adding silane coupling agent, Comparative Example 3 without adding castor oil, and Comparative Example 4 without adding additives.

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Abstract

The invention discloses a preparation method of a liquefied petroleum gas oxidation desulfurization agent, and relates to the technical field of petrochemical industry. The preparation method of the desulfurization agent comprises the steps of activating silica gel, modifying the silica gel and loading the silica gel; alpha-hydroxy acid and a silane coupling agent can enhance the affinity of silica gel for liquefied petroleum gas and the absorption capacity for polar substances; under the catalysis of additives, an oxidizing agent supported on the silica gel can quickly and efficiently oxidizesulfur-containing substances in the liquefied petroleum gas into polar oxides which can be absorbed by the silica gel. The modified silica gel is used as a desulfurizing agent, and an organic solventis not involved; the method is simple to operate, environmentally-friendly and remarkable in sulfur removal effect; furthermore, after absorption, the silica gel can be recycled, so that the method is low in cost and suitable for industrial production.

Description

Technical field: [0001] The invention relates to the technical field of petrochemical industry, in particular to a preparation method of a liquefied petroleum gas oxidation desulfurizer. Background technique: [0002] The liquefied petroleum gas from catalytic cracking, delayed coking and other devices in the petroleum refining process contains a large amount of sulfide, except H 2 In addition to S, it also contains various forms of sulfur, such as CH 3 SH, C 2 h 5 SH, CH 3 SCH 3 etc., mainly CH 3 sh. Sulfides have a strong odor and are highly corrosive. When burned as fuel, sulfides will produce SOX and be discharged into the atmosphere, forming acid rain and causing serious pollution to the environment. [0003] The sulfur content of liquefied petroleum gas products is generally limited to 343mg / m 3 In the following, the desulfurization and refining of liquefied petroleum gas mainly adopts the hydrorefining method, which requires the use of catalysts, hydrogen, hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/286C10G27/02C10G25/00B01J20/30C10L3/12
CPCB01J20/22B01J20/30C10G25/003C10G27/02C10L3/12
Inventor 黄帮义
Owner ANHUI HAIDE PETROCHEM
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