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Method and reaction system for producing low-sulfur petroleum coke

A reaction system, petroleum coke technology, applied in the petroleum industry, hydrocarbon oil treatment, multi-stage serial refining process treatment, etc., can solve the unsuitable and unrealistic problems of separating sulfur components, and achieve the reduction of sulfur content and reduction Operating cost, high selectivity effect

Active Publication Date: 2020-07-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for residual oil, it is not practical to use solid catalyst due to the nature of residual oil. The best method is to use oil-soluble homogeneous catalyst, and it is not suitable to use rectification, solvent extraction or adsorption to separate sulfur components.

Method used

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  • Method and reaction system for producing low-sulfur petroleum coke
  • Method and reaction system for producing low-sulfur petroleum coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The oil-soluble catalyst is molybdenum isooctanoate purchased from the market, and the manufacturer is Xianju Fusheng Chemical Factory, which is denoted as A1, and its metal molybdenum content is 15.2 wt%.

[0054] Toluene is used as the dilution solvent, and the residual oil and toluene are diluted at a weight ratio of 1:0.7. Weigh 170g of the diluted residual oil, add 3.0g of A1 catalyst, and add 38wt% at a rate of 0.0.5g / min at 85°C Hydrogen peroxide, the molar ratio of sulfur and hydrogen peroxide in the residual oil is 1:5, and the reaction time is 1h.

[0055] The reactant is distilled to remove the solvent to obtain the oxidized residue oil Y1. The operation condition of the distillation is normal pressure and the temperature is 110° C., and the toluene and water are distilled off.

[0056] Take 2g of oxidized residual oil and conduct a rapid coking experiment to obtain petroleum coke C1. The sulfur content in the petroleum coke is analyzed. The experimental resu...

Embodiment 2

[0058] Catalyst A2 uses molybdenum isooctanoate purchased from the market, the manufacturer is Alfa Aesar, and the molybdenum content is 15.6 wt%.

[0059] Using the same experimental method as in Example 1, gasoline fractions were used as diluents. The gasoline fractions were obtained from Yanshan Petrochemical Co., Ltd., with a distillation range of 45°C-220°C. dilution. Weigh 180g of diluted residual oil, add 4.0g of A2 catalyst, and add 38wt% hydrogen peroxide at a rate of 0.0.5g / min at 85°C, so that the molar ratio of sulfur to hydrogen peroxide in the residual oil is 1: 6. The reaction time is 1h.

[0060] The reactant is distilled to remove the solvent to obtain the oxidized residue Y2. The operation condition of the distillation is normal pressure, the temperature is 230°C, and the gasoline and water are distilled off.

[0061] Take 2g of oxidized residual oil and conduct a rapid coking experiment to obtain petroleum coke C2. The sulfur content in the petroleum coke ...

Embodiment 3

[0063] Catalyst A3 is iron isooctanoate purchased from the market, produced by Xianju Fusheng Chemical Plant, and its metallic iron content is 13.4 wt%.

[0064] The experimental method is the same as in Example 1. The diluent is diluent using catalytic diesel fraction (taken from Yanshan Petrochemical Co., Ltd., with a distillation range of 220°C-320°C), and diluting residual oil raw material and diesel fraction at a weight ratio of 1:1. Weigh 200g of diluted residual oil, add 4.4g of A3 catalyst, and add 38wt% hydrogen peroxide at a rate of 0.0.5g / min at 85°C, so that the molar ratio of sulfur to hydrogen peroxide in the residual oil is 1: 3. The reaction time is 1h.

[0065] The reactant is distilled to remove the solvent to obtain the oxidized residue Y3. The distillation operating condition is normal pressure and the temperature is 330° C. to distill diesel oil and water.

[0066] Take 2g of oxidized residual oil and conduct a rapid coking experiment to obtain petroleum ...

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Abstract

The invention relates to a method and a reaction system for producing low-sulfur petroleum coke. The method comprises the following steps: (1) uniformly mixing a residual oil raw material with a diluting solvent, adding an oil-soluble oxidation catalyst and an oxidant, and carrying out a reaction, so that the sulfur-containing compound in the residual oil is oxidized into sulfone and sulfoxide; (2) distilling the residual oil after the oxidation reaction to remove the diluting solvent; and (3) feeding the oxidized residual oil into a delayed coking reactor, decomposing the sulfone and the sulfoxide to generate sulfur oxide under a delayed coking condition, and feeding the sulfur oxide into a cracking gas phase to obtain a low-sulfur petroleum coke product and sulfur-containing cracking gas. The method provided by the invention can be used for producing low-sulfur petroleum coke, wherein the sulfur content in the petroleum coke can be reduced by more than 50%, and the sulfur in the petroleum coke is transferred into a gas phase so as to be recycled, so that the requirement of environmental protection is met; and an oil-soluble metal catalyst is adopted, so that the catalyst dosage is small, the catalytic efficiency is high, the catalyst does not need to be separated after reaction, and the technological process is simplified.

Description

technical field [0001] The invention relates to a heavy oil treatment method and a reaction system, more specifically, to a method and a reaction system for producing low-sulfur petroleum coke from heavy oil. Background technique [0002] With the rapid development of the global economy, the demand for energy is increasing day by day, and after long-term development of oil resources, the degree of heavy and inferior quality continues to increase. Inferior oil resources, heavy oil resources, and increasingly stringent environmental protection requirements have brought new challenges to oil refining technology. The efficient green conversion of heavy oil requires on the one hand to "dry and squeeze" the raw oil as much as possible. Environmental friendly. [0003] At present, due to the increasingly high sulfur content in crude oil and increasingly stringent environmental protection requirements, the sulfur content in petroleum coke produced by delayed coking must not exceed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/14
CPCC10G53/14C10G2300/202
Inventor 李子锋任磊刘必心申海平陈昱
Owner CHINA PETROLEUM & CHEM CORP
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