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Petroleum coke desulfurization method

A petroleum coke, high sulfur technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of poor desulfurization effect, high energy consumption, large investment, etc., to promote removal, reduce mass transfer resistance, The effect of improving efficiency

Pending Publication Date: 2022-07-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, petroleum coke desulfurization methods mainly include two types, one of which is to start from the raw materials for the production of petroleum coke, that is, to control the sulfur content of the coking unit feed (residue, catalytic cracking oil slurry and ethylene tar), and use hydrogenation, oxidation , sodium desulfurization and other methods to treat sulfides in the raw oil of the coking unit, and start from the source control to reduce the sulfur content of coking products, but this method has the problems of high energy consumption and large investment
The other is to directly desulfurize petroleum coke. Due to the high degree of graphitization of petroleum coke, the sulfide is closely combined with the carbon skeleton of petroleum coke, and the distribution of sulfide in petroleum coke is not regular. This method has poor desulfurization effect. The problem

Method used

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  • Petroleum coke desulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 100g of petroleum coke and mix it with 50g of sodium hydroxide evenly, place it in a tube furnace, heat it up to a temperature of 700°C under a nitrogen atmosphere, and heat treatment for 20min. The activated sample was washed with deionized water until the pH value of the filtrate was neutral. 50 g of material A and 150 g of DMF were treated at 80°C for 12 hours, washed to neutrality, and dried at 120°C for 6 hours to obtain material B. use N 2 O 4 Gas, at an airspeed of 500h -1 , 40°C and 1 atm, the material B was processed for 10 h, and the material C was obtained. Material C was further heated to 700°C in a power microwave field with a frequency of 2450 MHz and a power of 4 kW, and the temperature was kept constant for 1 h. Then take 150g of deionized water to wash 50g of material C, and the washing time is 4h. Desulfurized petroleum coke is obtained, which is denoted as C-1.

Embodiment 2

[0032] Take 100g of petroleum coke and mix with 5g of potassium hydroxide evenly, place it in a tube furnace, heat it up to a temperature of 500°C under a nitrogen atmosphere, and heat treatment for 20min. The activated sample was washed with deionized water until the pH value of the filtrate was neutral. 50 g of material A and 250 g of DMF were treated at 60°C for 12 hours, washed to neutrality, and dried at 120°C for 6 hours to obtain material B. Use high-purity NO2 Gas, at an airspeed of 1000h -1 , 50°C and 1 atm, the time for processing material B is 10h, and material C is obtained. Material C was further heated to 700°C in a power microwave field with a frequency of 2450 MHz and a power of 4 kW, and the temperature was kept constant for 1 h. Then take 150g of deionized water to wash 50g of material C, and the washing time is 4h. Desulfurized petroleum coke is obtained, which is denoted as C-2.

Embodiment 3

[0034] Take 100g of petroleum coke and mix it with 50g of sodium hydroxide evenly, place it in a tube furnace, heat it up to a temperature of 700°C under a nitrogen atmosphere, and heat treatment for 20min. The activated sample was washed with deionized water until the pH value of the filtrate was neutral. 50 g of material A and 150 g of DMF were treated at 80°C for 12 hours, washed to neutrality, and dried at 120°C for 6 hours to obtain material B. The concentration used is 50%N 2 O 4 gas (nitrogen as carrier gas) at a space velocity of 500 h -1 , 60°C and 2 atm, the time for processing material B is 10h, and material C is obtained. Material C was further heated to 700°C in a power microwave field with a frequency of 2450 MHz and a power of 1 kW, and the temperature was kept constant for 0.5 h. Then take 150g of deionized water to wash 50g of material C, and the washing time is 4h. Desulfurized petroleum coke is obtained, which is denoted as C-3.

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Abstract

The invention discloses a petroleum coke desulfurization method which comprises the following steps: firstly, mixing a petroleum coke raw material with an alkali metal compound, and carrying out heat treatment to obtain pretreated petroleum coke A; further treating with a solvent to obtain pretreated petroleum coke B; treating the pretreated petroleum coke B and nitrogen oxide-containing gas to obtain pretreated petroleum coke C; and separating, washing and drying a pyrolysis material obtained by pyrolyzing the pretreated petroleum coke C to obtain a petroleum coke product. The petroleum coke desulfurization method provided by the invention can effectively reduce the mass transfer resistance of the reaction and improve the efficiency of the desulfurization reaction.

Description

technical field [0001] The invention relates to the petrochemical field, in particular to a petroleum coke desulfurization process. Background technique [0002] The newly revised Law of the People's Republic of China on the Prevention and Control of Air Pollution, which took effect on January 1, 2016, requires the formulation of stricter standards for petroleum coke. Strictly limited, the fixed maximum value is not more than 3wt%. This means that the sales, import and use of "petroleum coke with a sulfur content higher than 3wt%" are under control. How to consume and convert high-sulfur petroleum coke has become an imminent problem. Using petroleum coke, especially high-sulfur petroleum coke to prepare high value-added activated carbon The product can not only obtain higher economic benefits, but also expand a new route with good economic and social benefits for the utilization of high-sulfur petroleum coke. At present, there are mainly two methods for desulfurization of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/33
CPCC01B32/348C01B32/33
Inventor 马锐宋永一张舒冬张庆军蔡海乐王超赵丽萍刘继华乔凯张长安
Owner CHINA PETROLEUM & CHEM CORP
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