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Method for recycling activated carbon-based desulfurizer

A desulfurization agent and activated carbon technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high cost, ineffective recycling of desulfurizer materials, Human and environmental hazards and other issues, to achieve a good practical effect

Active Publication Date: 2020-07-10
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above methods only treat the sulfur adsorbed on the desulfurizer, and some methods use organic solvents, which are costly and have serious harm to human body and environment. After the sulfur is removed, the desulfurizer materials are not effectively recycled.

Method used

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  • Method for recycling activated carbon-based desulfurizer
  • Method for recycling activated carbon-based desulfurizer
  • Method for recycling activated carbon-based desulfurizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Dry the modified activated carbon desulfurizer in the desulfurization tank, the drying conditions are: air atmosphere of the desulfurization tank, the temperature is 50 ° C, and the drying time is 12 hours;

[0042] (2) adding the desulfurizing agent (sulfur content is 34wt%) in the step (1) to the catalytic cracking diesel oil whose flow rate is 260-280°C at 80°C, mechanically stirring for 6 hours, and then separating the solid and liquid to obtain the desulfurizing agent material;

[0043] (3) Add the desulfurizing agent material in step (2) to No. 6 solvent oil, and obtain the treated desulfurizing agent activated carbon material after stirring for 1 h, wherein the sulfur content is 2.3wt%;

[0044] (4) Grind the activated carbon material in step (3) to ≤160 mesh, and use conventional methods to prepare composite oxide carriers with alumina, titanium oxide, and activated carbon as raw materials. The pore volume of the carrier is 0.52mL / g, and the specific surface ...

Embodiment 2

[0048] (1) In the desulfurization tank, the activated carbon loaded nickel desulfurizer (calculated as NiO, the nickel content is 17% of the catalyst) is dried, the drying conditions are: desulfurization tank 20% air+80% nitrogen atmosphere, the temperature is 60-80 ℃, drying time 10h;

[0049] (2) adding the desulfurizing agent (with a sulfur content of 28wt%) in the step (1) to the catalytic cracking diesel oil whose process flow is 280-300°C at 100°C, mechanically stirring for 8 hours, and then separating the solid and liquid to obtain the desulfurizing agent material;

[0050] (3) Add the desulfurizing agent material in step (2) to No. 6 solvent oil, and obtain the treated desulfurizing agent activated carbon material after stirring for 0.5h, wherein the sulfur content is 3.7wt%;

[0051] (4) Grind the activated carbon material in step (3) to ≤160 mesh, and use conventional methods to prepare composite oxide carriers with alumina, titanium oxide and activated carbon as raw...

Embodiment 3

[0055] (1) In the desulfurization tank, nickel and cobalt desulfurizers are loaded on activated carbon (in terms of NiO, the nickel content is 11% of the catalyst, and in terms of CoO 2 Calculated, the cobalt content is 9% of the catalyst,) for drying treatment, the drying conditions are: desulfurization tank 20% air + 80% nitrogen atmosphere, the temperature is 60-80 ℃, and the drying time is 10h;

[0056] (2) adding the desulfurizing agent (with a sulfur content of 28wt%) in the step (1) to the catalytic cracking diesel oil whose process flow is 280-300°C at 100°C, mechanically stirring for 8 hours, and then separating the solid and liquid to obtain the desulfurizing agent material;

[0057] (3) Add the desulfurizing agent material in step (2) to No. 6 solvent oil, and obtain the treated desulfurizing agent activated carbon material after stirring for 0.5h, wherein the sulfur content is 3.7wt%;

[0058] (4) Grind the activated carbon material in step (3) to ≤160 mesh, and us...

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Abstract

The invention belongs to the technical field of chemical waste recycling, in particular to a recycling method for an activated carbon-based desulfurizer. The method comprises the following steps: carrying out oxidation drying on the activated carbon-based desulfurizer in a desulfurization tank; performing solid-liquid separation after mixing the desulfurizer with catalytically cracked diesel oil to obtain a desulfurizer material; mixing the obtained desulfurizer material with No. 6 solvent oil continuously and then carrying out solid-liquid separation to obtain treated activated carbon; takingalumina, titanium dioxide and activated carbon as raw materials to prepare a composite oxide carrier; taking cobalt, molybdenum and nickel as active components, and rare earth elements as additives,and loading on the carrier by an impregnation method to obtain a semi-finished catalyst; carrying out anaerobic roasting on the semi-finished catalyst to obtain a finished catalyst. According to the invention, a hydrogenation catalyst is prepared by completely recycling waste activated carbon-based desulfurizer as a part of the raw materials, therefore, and suitable for hydrofining of cracking gasoline after one-stage hydrogenation, and performances of the hydrogenation catalyst meet requirements of industrial use.

Description

technical field [0001] The invention belongs to the technical field of recycling chemical wastes, and in particular relates to a method for recycling activated carbon-based desulfurizers. Background technique [0002] The dry desulfurization process is a method of removing low-concentration H 2 S is an economical and effective desulfurization process. Activated carbon-based desulfurization agent is the core of dry desulfurization process. Activated carbon-based desulfurization agent is usually composed of modified activated carbon, or activated carbon as a carrier, loaded with active components and metal oxides. The metal oxide used The material is generally one or more of copper oxide, iron oxide, aluminum oxide, nickel oxide, manganese oxide, cobalt oxide and zinc oxide. During the long-term continuous use of the desulfurizer, the sulfur generated by the desulfurization reaction continuously accumulates on the surface of the desulfurizer or adheres and fills in the microp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83
CPCB01J23/83
Inventor 姜建波王昊薛红霞白志敏齐焕东赵庆鲁
Owner CHINA PETROLEUM & CHEM CORP
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