Combined process of hydrotreating and catalytic cracking for inferior oil products

A technology of hydrotreating and catalytic cracking, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problem of products that cannot meet the requirements of production performance, limited increase in cetane number, and cannot well meet high Quality Vehicle diesel product quality index requirements and other issues

Active Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diesel fraction is obtained through high-pressure hydrogenation, and its residual sulfides are mainly 4,6-dimethyldibenzothiophene sulfur-containing compounds, which are very difficult to remove
In addition, the diesel fraction usually has a low paraffin content, and even after deep hydrotreatin

Method used

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  • Combined process of hydrotreating and catalytic cracking for inferior oil products
  • Combined process of hydrotreating and catalytic cracking for inferior oil products
  • Combined process of hydrotreating and catalytic cracking for inferior oil products

Examples

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Effect test

Embodiment 1

[0044] This embodiment adopts the combined process of hydrotreating and catalytic cracking of inferior oil products provided by the present invention. After mixing the raw oil and hydrogen, it enters the hydrotreating zone and contacts with the hydrogenation protection catalyst, hydrodemetallization catalyst and hydrodesulfurization catalyst in sequence. The hydrogenation reaction is carried out, and the effluent from the hydrogenation reaction zone enters the hot high-pressure separator for gas-liquid separation after heat exchange, and the hot high-separation oil and hot high-separation gas are separated, and the hot high-separation gas enters the cold storage after heat exchange and cooling. High-pressure separator, after separation, cold high-fraction gas and cold high-fraction oil are obtained. After the cold high-fraction gas is dehydrogenated, it enters the circulating compressor to increase the pressure and then circulates to the hydrogenation reactor inlet. The new hydr...

Embodiment 2

[0061] This embodiment adopts the combined process of residual oil hydrotreating and catalytic cracking provided by the present invention, and the gradation of raw materials and catalysts in the hydrogenation reaction is consistent with that of Embodiment 1.

[0062] This embodiment adopts the combined process of hydrotreating and catalytic cracking of inferior oil products provided by the present invention. After mixing the raw oil and hydrogen, it enters the hydrotreating zone and contacts with the hydrogenation protection catalyst, hydrodemetallization catalyst and hydrodesulfurization catalyst in sequence. The hydrogenation reaction is carried out, and the effluent from the hydrogenation reaction zone enters the hot high-pressure separator for gas-liquid separation after heat exchange, and the thermal high-separation oil and hot high-separation gas are separated, and the hot high-separation gas enters after heat exchange and cooling. Cold high-pressure separator, after sepa...

Embodiment 3

[0064] This embodiment adopts the combined process of residual oil hydrotreating and catalytic cracking provided by the present invention, and the gradation of raw materials and catalysts in the hydrogenation reaction is consistent with that of Embodiment 1.

[0065]This example adopts the combination process of residual oil hydrotreating and catalytic cracking provided by the present invention. This example adopts the combined process of hydrotreating and catalytic cracking of inferior oil products provided by the present invention. The raw oil and hydrogen are mixed and then enter the hydrotreating zone. Contact with hydrogenation protection catalyst, hydrodemetallization catalyst and hydrodesulfurization catalyst in sequence to carry out hydrogenation reaction. After heat exchange, the effluent from the hydrogenation reaction zone enters the hot high-pressure separator for gas-liquid separation, and the separation obtains hot high-fraction oil and Hot high-separation gas, th...

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Abstract

The invention discloses a combined process of hydrotreating and catalytic cracking for inferior oil products. The process comprises the following contents: raw oil and a hydrogen gas are mixed, the mixed material enters a hydrotreating reaction zone, and the obtained effluent of a hydrogenation reaction is subjected to gas-liquid separation, so that hot low-separation oil and cold low-separation oil are obtained; the obtained hot low-separation oil and cold low-separation oil are directly enter a fractionation tower through different material inlets for separation, so that a light catalytic cracking raw material and a heavy catalytic cracking raw material are obtained; a part of the obtained heavy catalytic cracking raw material and a hydrogen gas are mixed, the mixed material enters a hydrogenation residual-carbon removing reaction zone, the reaction product enters a separation unit, and the reaction product and the reaction effluent of the hydrotreating reaction zone are subjected toseparation; and the obtained light catalytic cracking raw material and the rest of the heavy catalytic cracking raw material individually enter a catalytic cracking device or enter the catalytic cracking device after mixing for a catalytic cracking reaction, and the reaction product enters a catalytic cracking product separation system. The combined process provided by the invention can produce amaximum amount of high-value-added products, and can greatly reduce the overall energy consumption of a hydrogenation device.

Description

technical field [0001] The invention relates to a method for lightening low-quality oil products, specifically a process for producing light fuel oil products by organically combining hydrogenation treatment and catalytic cracking processes with low-quality oil products as raw materials. Background technique [0002] As crude oil becomes heavier and worse, more and more residual oil needs to be processed. Residual oil generally refers to crude oil or hydrocarbon materials from other sources. After vacuum distillation, gasoline fraction, diesel fraction, and vacuum distillate oil are removed. The remaining part after waiting for the fraction generally has the characteristics of high boiling point and high impurity content, and is the most difficult raw material to process in the oil refining industry. The processing of residual oil is not only to crack it into products with low boiling point, such as naphtha, middle distillate oil and vacuum gas oil, etc., but also to increas...

Claims

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Application Information

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IPC IPC(8): C10G69/00C10G3/00
Inventor 刘铁斌耿新国翁延博
Owner CHINA PETROLEUM & CHEM CORP
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