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Method for removing nitride from heavy oil

A nitride and removal technology, applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problems of high viscosity, complex composition, high processing cost, and achieve good technical effect.

Inactive Publication Date: 2015-05-20
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] However, complexing agents usually use transition metal chlorides, and the processing cost is relatively high, especially when the impurity content in the oil is high, the processing cost will be greatly increased due to the consumption of more complexing agents
[0024] As mentioned above, the current denitrification methods have certain defects. At the same time, due to the high viscosity and complex composition of heavy oil such as heavy oil, there have been no reports and prior art on the use of ionic liquids for heavy oil denitrification.

Method used

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  • Method for removing nitride from heavy oil
  • Method for removing nitride from heavy oil
  • Method for removing nitride from heavy oil

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0070] Preparation Example 1: Preparation of Denitrification Agent T1

[0071] S1: N, N, N-triethylammonium bromide ([(C 2 h 5 ) 3 NH]Br, also known as triethylamine hydrobromide or triethylamine hydrobromide) and aluminum trichloride (AlCl 3 ) were mixed according to a molar ratio of 1:1, stirred and mixed at room temperature for 20 minutes, then raised to 80°C, and kept stirring at this temperature for 2 hours. After the reaction was completed, naturally cooled to room temperature and dried to obtain the basic ion liquid;

[0072] S2: gac is added into the hydrochloric acid aqueous solution that molar concentration is 1mol / L (the mass volume ratio of gac and hydrochloric acid aqueous solution is 1:5g / ml), reflux treatment 2 hours, then filter to obtain solid A; In mixed acid (a mixture of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 2:1) was stirred for 20 minutes (the mass volume ratio of the solid A to the mixed acid was 1:8 g / ml), fil...

preparation example 2

[0075] Preparation Example 2: Preparation of Denitrification Agent T2

[0076] S1: N,N-diisopropylammonium chloride ([(i-Pr) 2 NH 2 ]Cl, also known as diisopropylamine hydrochloride or diisopropylamine hydrochloride) and ferric chloride (FeCl 3 ) were mixed according to a molar ratio of 1:2, stirred and mixed at room temperature for 30 minutes, then raised to 90°C, and kept stirring at this temperature for 4 hours. After the reaction was completed, naturally cooled to room temperature and dried to obtain the basic ion liquid;

[0077] S2: SiO 2 Added to the aqueous solution of nitric acid with a molar concentration of 2mol / L (SiO 2 The mass volume ratio with the nitric acid aqueous solution is 1:15g / ml), reflux treatment for 6 hours, and then filter to obtain solid A; Solid A is again mixed in a mixed acid (volume ratio is 3:1 The mixing of concentrated sulfuric acid and concentrated nitric acid solution) with stirring for 35 minutes (the mass volume ratio of the solid A ...

preparation example 3

[0080] Preparation Example 3: Preparation of Denitrification Agent T3

[0081] S1: N-benzyl-N-isopropylammonium chloride ([(i-Pr)(C 6 h 5 CH 2 )NH 2 ]Cl, also known as N-benzylisopropylamine hydrochloride or N-benzylisopropylamine hydrochloride) and aluminum tribromide (AlBr 3 ) were mixed at a molar ratio of 1:3, stirred and mixed at room temperature for 40 minutes, then raised to 100°C, and kept stirring at this temperature for 2 hours. After the reaction was completed, naturally cooled to room temperature and dried to obtain the basic ion liquid;

[0082] S2: Aluminum oxide is added to the aqueous sulfuric acid solution whose molar concentration is 3mol / L (the mass volume ratio of aluminum oxide and sulfuric acid aqueous solution is 1:25g / ml), reflux treatment for 10 hours, and then filter to obtain solid A; A was stirred again in the mixed acid (a mixture of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 4:1) for 50 minutes (the mass vo...

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Abstract

The invention provides a method for removing nitride from heavy oil. The method comprises the following steps: allowing a supported ionic liquid denitriding agent and the heavy oil to react; after the reaction, cooling a reaction system; centrifugally treating the reaction mixture; separating the denitriding agent to obtain denitrided heavy oil, wherein by selection and combination of each component in the supported ionic liquid denitriding agent and the used amount and by specific technological treatment and parameters of a preparation method, the denitriding agent is good in denitriding effect and excellent in recycle capability, so that the method disclosed by the invention has lots of advantages of simple process, environmental protection and low cost and is a method, which has quite good industrial application prospect, for removing the nitride from the heavy oil.

Description

technical field [0001] The invention relates to a method for removing nitrogen compounds in heavy oil using a denitrification agent, in particular to a method for removing nitrogen compounds in heavy oil using a solid-carrying ionic liquid as a denitrification agent, and belongs to the field of petrochemical industry. Background technique [0002] In recent years, with the heavy and inferior quality of crude oil worldwide, it is increasingly important to increase the conversion depth of heavy oil and increase the production of light oil products. At present, processes such as coking, heavy oil catalytic cracking and heavy oil hydrotreating have become the main heavy oil processing methods. [0003] As an important thermal processing method, the coking process can process heavy oil with high sulfur, high nitrogen, and high metal content. The process flow is simple, the investment and operation costs are low, and the coking naphtha can be used as the starting point of the crac...

Claims

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Application Information

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IPC IPC(8): C10G29/20
CPCC10G29/20C10G2300/202
Inventor 杨淑清郑贤敏文建军王路辉王东光
Owner ZHEJIANG OCEAN UNIV
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