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Desulfurization process of high-sulfur petroleum coke

A desulfurization process and petroleum coke technology, which is applied in the coking field, can solve the problems of high desulfurization cost, complex process, and many equipment, and achieve the effects of reducing environmental pollution, simple preparation and low price.

Active Publication Date: 2020-09-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process can achieve the purpose of desulfurization, the process is complicated, more equipment is required, and the cost of desulfurization is higher

Method used

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  • Desulfurization process of high-sulfur petroleum coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The improved high-sulfur petroleum coke desulfurization process is used to achieve the purpose of producing low-sulfur petroleum coke. The specific steps are as follows:

[0048] The preparation mass fraction is 2% Ca(OH) 2 solution, the Ca(OH) 2 The solution and high-sulfur petroleum coke were added into the autoclave according to the liquid-solid ratio of 5:1, the temperature was kept at 90°C, the activation time was 4h, and the pressure in the autoclave was 40MPa. After the activation process, the solution was suction-filtered, and the activated Petroleum coke was dried at 110°C for 10 hours.

[0049] Prepare 8mol / L HNO 3 with 2mol / L H 2 o 2 The mixed solution is used as an oxidant, and then NiO, CrCO 3 The mixed solid with CaO mass ratio=1:0.3:3 is used as catalyst.

[0050] The oxidant and the activated high-sulfur petroleum coke are mixed according to the liquid-solid ratio of 10:1, and the catalyst and the activated high-sulfur petroleum coke are mixed acco...

Embodiment 2

[0082] The improved high-sulfur petroleum coke desulfurization process is used to achieve the purpose of producing low-sulfur petroleum coke. The specific steps are as follows:

[0083] The preparation mass fraction is 2% Ca(OH) 2 solution, the Ca(OH) 2 The solution and high-sulfur petroleum coke were added into the autoclave according to the liquid-solid ratio of 5:1, the temperature was kept at 90°C, the activation time was 4h, and the pressure in the autoclave was 40MPa. After the activation process, the solution was suction-filtered, and the activated Petroleum coke was dried at 110°C for 10 hours.

[0084] Prepare 9mol / L HNO 3 with 3mol / L H 2 o 2 The mixed solution is used as an oxidant, and then NiO, CrCO 3 The mixed solid with CaO mass ratio=1:0.3:3 is used as catalyst.

[0085] The oxidant and the activated high-sulfur petroleum coke are mixed according to the liquid-solid ratio of 10:1, and the catalyst and the activated high-sulfur petroleum coke are mixed acco...

Embodiment 3

[0088] The improved high-sulfur petroleum coke desulfurization process is used to achieve the purpose of producing low-sulfur petroleum coke. The specific steps are as follows:

[0089] The preparation mass fraction is 2% Ca(OH) 2 solution, the Ca(OH) 2 The solution and high-sulfur petroleum coke were added into the autoclave according to the liquid-solid ratio of 5:1, the temperature was kept at 90°C, the activation time was 4h, and the pressure in the autoclave was 40MPa. After the activation process, the solution was suction-filtered, and the activated Petroleum coke was dried at 110°C for 10 hours.

[0090] Prepare 9mol / L HNO 3 with 3mol / L H 2 o 2 The mixed solution is used as an oxidant, and then NiO, CrCO 3 The mixed solid with CaO mass ratio=1:0.25:2.5 is used as catalyst.

[0091] The oxidant and the activated high-sulfur petroleum coke are mixed according to the liquid-solid ratio of 10:1, and the catalyst and the activated high-sulfur petroleum coke are mixed a...

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Abstract

The invention relates to a desulfurization process of high-sulfur petroleum coke. The desulfurization process comprises the following steps: uniformly mixing alkali liquor and high-sulfur petroleum coke to be desulfurized to obtain a mixture; loading the mixture into an autoclave, activating for 2-8 hours at a temperature of 40-100 DEG C under a pressure of 20-60 MPa, drying for 8-10 hours at a temperature of 100-120 DEG C to obtain an activated material; uniformly mixing the activated material, a catalyst and an oxidant, carrying out oxidation for 5-15 hours at a temperature of 60-150 DEG C to obtain slurry; carrying out suction filtration on the slurry to obtain a solid-phase substance, drying the solid-phase substance at a temperature of 100-120 DEG C for 8-12 hours, and calcining the solid-phase substance to obtain low-sulfur petroleum coke. The desulfurization process is high in desulfurization rate, and the obtained low-sulfur petroleum coke is good in quality.

Description

technical field [0001] The invention relates to a desulfurization process of high-sulfur petroleum coke, which belongs to the technical field of coking. Background technique [0002] Petroleum coke is the main by-product of the petroleum refining industry and is generally produced by the delayed coking process. Because of its low ash content and high fixed carbon content, petroleum coke is widely used in metallurgy, materials and chemical industries. [0003] However, with the trend of heavy and inferior crude oil resources worldwide, the quality of petroleum coke, a by-product of petroleum refining, is gradually decreasing, especially the sulfur content in petroleum coke is constantly increasing. Excessive sulfur content in petroleum coke will greatly affect the quality of the product. At the same time, as the sulfur content in petroleum coke increases, the lower-level industrial enterprises that use petroleum coke as raw materials are also correspondingly bearing more an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 仲奇凡肖劲王港犹子涵姚桢
Owner CENT SOUTH UNIV
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