Method for producing high-quality low-freezing diesel oil

A diesel and low-condensation technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of small freezing point depression and low cetane number of diesel oil, etc.

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process belongs to the hydrogen decondensation process, the freezing p

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing high-quality low-freezing diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Using a kind of coking gasoline and diesel mixed oil ① as the raw material, the raw material ① is firstly subjected to whole-distillate hydrotreating in the first reaction zone, and the reaction effluent directly enters the second hydrogenation reaction zone without separation, and in the second hydrogenation reaction zone In the second reaction zone, the hydrogenation upgrading and depressing catalyst and the hydrofining catalyst II are used for upgrading and depressing and supplementary refining reactions, and the product in the second reaction zone enters the separation and fractionation system to cut out low-point-point product diesel oil. All diesel fractions are recycled to the inlet of the second reaction zone to undergo isomerization and cracking reactions to further lower the freezing point. The hydrorefining catalyst I loaded in the first reaction zone is RS-1000, the second reaction zone is filled with hydrogenation upgrading and pour point depressing catalyst...

Embodiment 2

[0067] Using coking gasoline and diesel mixed oil ① as raw material, the method provided by the invention is used for depressing, and 30% by weight of the heavy diesel fraction at 340-360°C is recycled to the entrance of the second reaction zone. The catalysts used are RS-1000, plus For the hydrogen-modified and pour-point depressing catalyst B and the RS-1000 catalyst, the three-part catalyst loading ratio is 45:45:10. The properties of raw oil are listed in Table 1, and the reaction conditions and product properties are listed in Table 2.

[0068] It can be seen from the data in Table 2 that the freezing point of the diesel product was reduced to -26°C, the cold filter point was reduced to -14°C, the yield reached 93.2%, the cetane number increased to 48.5, and the sulfur content was greatly reduced.

Embodiment 3

[0070] Diesel oil ② is used as raw material, and the method provided by the present invention is used for depressing, and 80% by weight of the heavy diesel fraction at 300-380°C is recycled to the entrance of the second reaction zone. The catalysts used are RS-1000, hydrogenation, upgrading Condensed catalyst B and RS-1000 catalyst, the three-part catalyst loading ratio is 40:50:10. The properties of raw oil are listed in Table 1, and the reaction conditions and product properties are listed in Table 3.

[0071] It can be seen from the data in Table 2 that the freezing point of the diesel product is reduced to -45°C, the cold filter point is reduced to -32°C, the yield reaches 88.2%, the cetane number increases to 43.0, and the sulfur content is greatly reduced.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for producing a high-quality low-freezing diesel oil, which is characterized in that a diesel oil raw material is contacted with a Hydrobon catalyst in a first hydrogenation reaction zone for reaction, an effluent is directly introduced in a second reaction zone without separating, and is contacted with a hydrogenation modified pour point depression catalyst for a pour point depression reaction, an effluent in the second reaction zone is introduced in the separating system and the fractionation system, the heavy diesel fuel fraction at the bottom of a fractionate tower is circularly introduced in an inlet of the second reaction zone. According to the invention, the hydrogenation modified pour point depression catalyst is employed for obviously reducing the condensation point of the diesel oil fraction, the heavy diesel fuel component with high condensation point is circularly introduced in the second reaction zone for remodifying the pour point depression reaction, and the target product yield can be increased.

Description

technical field [0001] The invention relates to a process for refining and upgrading hydrocarbons in the presence of hydrogen. More specifically, a method of producing high-quality low-condensation diesel. Background technique [0002] With the continuous and rapid development of my country's national economy and the improvement of people's living standards, the demand for vehicle fuel continues to increase, especially in the northern market in winter, the demand for low-condensation diesel is growing rapidly. On the other hand, with the continuous acceleration of diesel quality upgrading, the quality requirements of diesel products are becoming more and more stringent. In addition to special requirements on freezing point and cold filter point, low-condensation diesel has strict requirements on sulfur content, polycyclic aromatic hydrocarbon content, ten Hexane number, etc. also have strict requirements. [0003] Most of the domestic crude oil in northern my country is pa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C10G67/02
Inventor 任亮蒋东红张毓莹胡志海聂红王子文董松涛
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap