Combined process for delayed coking and hydrotreating

A hydrotreating and delayed coking technology, applied in the combined process field, can solve the problems of heavy distillation range of coking wax oil, complex fractionation tower process, high aromatics content, etc., achieve process optimization, ensure long-term operation, reduce coke yield and The effect of gas yield

Active Publication Date: 2010-02-03
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coker gas oil obtained under the condition of low circulation ratio or zero circulation ratio has the characteristics of heavy distillation range, high impurity content a

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
  • Combined process for delayed coking and hydrotreating

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] The feedstock oil used in Example 1 is high-sulfur slag reduction, and its properties are listed in Table 1.

[0033] The reaction conditions for delayed coking are that the temperature at the outlet of the heating furnace is 500°C, the pressure at the top of the coke tower is 0.17MPa, and the circulation ratio is 0. The oil and gas at the top of the coke tower are separated into gas and liquid components after heat exchange and cooling. The liquid components of the whole coking fraction (including naphtha, diesel and wax oil fractions) are pressurized and carried out with hydrogen in a reactor under hydrotreating conditions, and the reactor is filled with a hydrotreating agent and a hydrotreating catalyst The ratio of the two is 15:85. The specific reaction conditions, product distribution and product properties are listed in Table 2 to Table 4 respectively.

[0034] It can be seen from Table 2 that the yield of coking liquid products is 63.7% by weight. I...

Example Embodiment

[0035] Example 2

[0036] The feedstock oil used in Example 2 is acid-containing cycloalkyl residue reduction, and its properties are listed in Table 5.

[0037] The reaction conditions for delayed coking are that the temperature at the outlet of the heating furnace is 500°C, the pressure at the top of the coke tower is 0.17MPa, and the circulation ratio is 0. The oil and gas at the top of the coke tower are separated into gas and liquid components after heat exchange and cooling. The liquid components of the whole coking fraction (including naphtha, diesel and wax oil fractions) are pressurized and carried out with hydrogen in a reactor under hydrotreating conditions, and the reactor is filled with a hydrotreating agent and a hydrotreating catalyst The filling ratio is 15:85. The specific reaction conditions, product distribution and product properties are listed in Table 6 to Table 8.

[0038] It can be seen from Table 6 that the yield of coking liquid products is 71.23% by weight...

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

PropertyMeasurementUnit
Densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a combined process for delayed coking and hydrotreating, which comprises the following steps that: a coking raw material is heated to enter a coking tower to react, oil gas escapes from the top of the coking tower, gas components and liquid components are separated, and the cycle ratio in a coking process is 0; and the liquid components are mixed with hydrogen to react in ahydrogenation reactor, then the obtained hydrogenated reaction effluent is distilled to obtain hydrogenated naphtha, hydrogenated diesel oil and hydrogenated wax oil, and the hydrogenated wax oil used as a high-quality raw material is fed into a catalytic cracking device or a hydrocracking device. By adopting the process flow of zero circulation of a coking device, the method provided by the invention furthest improves the yield of a liquid product, improves the processing depth of heavy oil, saves a coking fractionating tower, and achieves the aims of optimizing the flow and reducing the investment; and by adopting reasonable graduation of a hydrogenation catalyst, the method can furthest take account of the running period and the refining depth of each coking product fraction.

Description

technical field [0001] The invention belongs to a multi-step process for treating hydrocarbon oil in a thermal conversion step and a multi-step process for treating hydrocarbon oil in the presence of hydrogen, more specifically, it is an organic combination of two processes of delayed coking and coking whole distillate hydrotreating combined process method. Background technique [0002] At present, the world is facing the trend of crude oil becoming heavier and worse. People's demand for heavy fuel oil is gradually decreasing, while the demand for light oil is greatly increasing. Therefore, the lightening of heavy oil is the key to how to use limited oil resources to produce light products in a large amount. Because asphaltenes, metals, and residual carbon are almost all concentrated in the vacuum residue (residue reduction), the residue reduction is the most difficult to deal with. The main processes for processing and reducing slag include residual oil hydrotreating, cat...

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): C10G69/06
Inventor 胡志海蒋东红张毓莹王子文龙湘云王子军
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