Method for producing fuel oil by hydrogenation modification of coal tar

A hydrogenation modification and coal tar technology, which is applied in the direction of gasoline stabilization, refining to remove heteroatoms, etc., can solve the problems of high benzene insoluble matter, high prehydrogenation temperature, and large heat release, etc., to prolong the start-up period and reaction The effect of easing conditions and prolonging the operation cycle

Inactive Publication Date: 2008-08-27
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
View PDF1 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing coal tar hydrogenation technology mainly has the following problems: a. Colloid, asphaltenes, ash and benzene insoluble matter of coal tar raw materials are high, and it is very easy to coke in heat exchangers, reactors and other equipment and pipelines during the hydrogenation process. Unable to achieve continuous industrial production; b. Large heat release during coal tar hydrogenation and upgrading, bed temperature rise is difficult to control, and temperature overshoot is prone to occur
[0005] The applicant proposed a method for producing fuel oil by hydrogenation and upgrading of coal tar in the invention pat

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A medium-low temperature coal tar produced in a coking plant, the properties of which are shown in Table 1. After the light and heavy fractions are fractionated in the conventional fractionating tower, the light fractions are obtained by the conventional method of the coking plant to obtain about 3.5% crude phenol products, and the heavy fractions and the diluent oil (refinery catalytic diesel oil) are mixed uniformly in a ratio of 3:1 and then extracted. The heavy fraction was mixed with the dephenolized light fraction to obtain coal tar hydrogenation feed, and its properties are shown in Table 1. The pre-hydrogenation reactor is filled with molybdenum-nickel-based pre-hydrogenation catalyst and HG-1 hydrogenation protection agent, and the main hydrogenation reactor is filled with molybdenum-nickel-tungsten-phosphorus main hydrogenation catalyst. No coke inhibitor is added to the coal tar hydrogenation feed, and it enters the pre-hydrogenation reactor and the main hydr...

Embodiment 2

[0031] A medium-low temperature coal tar produced in a coking plant, the properties of which are shown in Table 3. After the light and heavy fractions are fractionated in the conventional fractionating tower, the light fractions are obtained by the conventional method of the coking plant to obtain about 4% crude phenol products. Finally, it is mixed with the dephenolized light fraction to obtain the coal tar hydrogenation raw material, and its properties are shown in Table 1. The pre-hydrogenation reactor is filled with molybdenum-nickel-based pre-hydrogenation catalyst and HG-1 hydrogenation protection agent, and the main hydrogenation reactor is filled with molybdenum-nickel-tungsten-phosphorus main hydrogenation catalyst. After adding 150ppm of coke inhibitor to the coal tar hydrogenation raw material, it enters the pre-hydrogenation reactor and the main hydrogenation reactor in turn. The pre-hydrogenation reaction conditions are pressure 12.0MPa, temperature 220°C, hydroge...

Embodiment 3

[0038] A high-temperature coal tar produced in a coking plant, the properties of which are shown in Table 5. After the light and heavy fractions are fractionated in the conventional fractionating tower, the light fractions are obtained by conventional methods in coking plants to obtain about 7% crude naphthalene products, and the heavy fractions and diluent oil (refinery catalytic diesel oil) are mixed uniformly in a ratio of 1:3 and then extracted. Finally, it is mixed with the dephenolized light fraction to obtain the coal tar hydrogenation raw material, and its properties are shown in Table 5. The pre-hydrogenation reactor is filled with molybdenum-nickel-based pre-hydrogenation catalyst and HG-1 hydrogenation protection agent, and the main hydrogenation reactor is filled with molybdenum-nickel-tungsten-phosphorus main hydrogenation catalyst. After adding 300ppm of coke inhibitor into the coal tar hydrogenation raw material, it enters the pre-hydrogenation reactor and the m...

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 discloses a method for producing fuel oil through hydrotreating in coal tar, which comprises the following steps: hydrotreating and feeding the coal tar to do pre-hydrotreating reaction and main-hydrotreating reaction after preprocessing coal tar, fractionating hydrogenated oil, and separating out low sulfur and low nitrogen light oil and fuel oil. The method leads a reaction condition to be softer, which inhibits and alleviates the coking process of coal tar hydrogenation material under high temperature with high efficiency, lowers bed layer temperature rising of a reactor, prolongs the service span of pre-hydrogenation catalyst, and assures the operation of longer cycle of the coal tar hydrogenation unit.

Description

1. Technical field: [0001] The invention belongs to the field of fuel chemical industry, and in particular relates to a method for producing fuel oil by hydrogenation and upgrading of coal tar. 2. Background technology: [0002] With the rapid development of the world economy, oil, as a non-renewable natural resource, is decreasing day by day, and its price is constantly rising. Although coal is also a non-renewable natural resource, the world's coal reserves are far more abundant than oil. It is the general trend to use coal as a backup or supplementary energy source for oil. [0003] The utilization of coal resources mainly includes the following types: direct coal combustion, direct coal liquefaction, coal indirect liquefaction and coal coking (including coal gasification). Coal tar is an important by-product obtained in the process of coal dry distillation and gasification, and its output accounts for about 4% of coking coal. In my country, a large part of coal tar is ...

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): C10G45/02C10G7/02
Inventor 李庆华郭朝辉佘喜春朱方明
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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