Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of residual oil bifunctional catalyst and its preparation and application

A dual-function catalyst, catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. It can improve the conversion rate of residual oil and the yield of distillate oil, prolong the start-up period of the unit, and improve the economic benefits.

Active Publication Date: 2017-07-25
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Carbonaceous powder catalyst is a kind of residual oil slurry bed hydrothermal cracking catalyst that is widely used. For example, in the prior art of residual oil slurry bed hydrothermal cracking, ferrous sulfate, ore powder or coal powder are used as additives. These The additive has a certain coke-carrying performance, but due to the low iron content in the additive, there are disadvantages such as a large amount of addition, poor dispersion in raw materials, and serious wear and tear on equipment
[0005] CN1020112C proposed the hydrocracking of heavy oil in the presence of ultra-fine ferric sulfate, requiring that ferric sulfate or iron ore etc. be mixed with oil and ground to a particle size of less than 45 microns in a stirring ball mill, preferably at least 50% of the particles The particle size is less than 5 microns. Although the use of this catalyst is beneficial to reduce coke formation and improve asphalt conversion, it is easy to operate in the laboratory to grind the solid to several microns, but the industrial implementation has higher requirements for the grinding machine, and the loss is large. Difficult to achieve
Solid-phase method is difficult to form nano-scale grains, hydrothermal / solvothermal synthesis method needs to be in a closed container, under the conditions of relatively high temperature and high pressure (generally 200 ° C, the pressure is generated by heating the solution), and requires a large amount of solvent, production high cost
[0007] CN1255407A and USP5866501 disclose a kind of dispersive fine-grained, anion-modified and phosphorus-promoted iron oxide slurry catalyst, the catalyst has a large specific surface area and a particle size less than 50 angstroms, and the inventor recommends using wet cake gel However, the wet cake contains at least 60% of water. The introduction of this part of water will not only increase the load on the reactor, but also cause difficulties in the separation of subsequent products. After drying, it is added as a dry powder. Due to the aggregation between particles, Catalyst activity decreases, heavy fractions are more

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
  • A kind of residual oil bifunctional catalyst and its preparation and application
  • A kind of residual oil bifunctional catalyst and its preparation and application
  • A kind of residual oil bifunctional catalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Dissolve 58.0g of ferrous sulfate heptahydrate and 0.20g of EDTA in 400g of deionized water, add 200.0g of C1 and stir evenly, take another 25.0g of ammonia water and drop into the above solution while stirring, and continue to stir for 40min, then perform suction filtration and washing to obtain The filter cake was dried at 110°C for 5 hours, and ground to obtain a powdery residual oil dual-function catalyst, denoted as A1. The iron content in A1 was analyzed to be 5.1wt%, and the water content was 2.0wt%. Characterization of the morphology of A1 under a scanning electron microscope shows that the primary particles of the catalyst active component iron compound are microspheres with a diameter of 10-30nm and rods with a length of 100nm and a width of 30nm. The volume ratio of the two is 50 / 50, see attached figure 1 . The average particle size measured by a laser particle size analyzer is 45 microns.

Embodiment 2

[0045] Weigh 58g of ferrous sulfate heptahydrate and put it into a beaker, add 200g of deionized water and stir continuously to dissolve, add 150.0g of C2 and stir to mix evenly, add 25g of ammonia water drop by drop while stirring, continue to stir for 60min, then suction filter, After washing, the obtained filter cake was dried at 105° C. for 5 hours, and ground to obtain a residue bifunctional catalyst, which was recorded as A2, and the iron content in A2 was 6.5 wt%. The water content was 1.8 wt%. Characterization of the morphology of A2 under a scanning electron microscope shows that the primary particles of the catalyst active component iron compound are microspheres with a diameter of 20-40nm and rods with a length of 120nm and a width of 30nm. The volume ratio of the two is 35 / 65, see attached figure 2 . The average particle size measured by a laser particle size analyzer is 40 microns.

Embodiment 3

[0047] Weigh 80g of ferric chloride and 0.55g of diammonium hydrogen phosphate into a beaker, add 100g of deionized water and stir to dissolve continuously, weigh 80.0g of C3 and stir to mix evenly, add 30g of ammonia water drop by drop while stirring. Inject air and continue to stir for 60 minutes, then suction filter and wash to obtain a filter cake that is dried at 105°C for 5 hours, and ground to obtain a residue bifunctional catalyst, which is designated as A3. The content of iron in the A3 catalyst is 20.0wt%. A3 scanning electron microscope shows that its primary particles are a combination of microspheres with a diameter of 10-50nm and rods with a length of 120nm and a width of 30nm, and the volume ratio of the two is 90 / 10, see attached image 3 . The average particle size measured by a laser particle size analyzer is 40 microns.

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
diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

A dual-functional catalyst for residue oil and its preparation and application. The catalyst is composed of an iron-containing compound and a carbonaceous powder. The primary particles of the iron-containing compound are composed of two nanoscale catalyst particles of different shapes. The iron-containing compound is passed through from Precipitation synthesis of iron-containing compounds in aqueous solution. The invention includes a preparation method of the catalyst, and a process of using the dual-function catalyst in hydrothermal cracking treatment of residual oil to produce low-boiling liquid products. The catalyst provided by the invention is especially suitable for the hydrothermal cracking process of ultra-heavy oil with high content of asphaltene and metals, and inferior residue oil. The catalyst has high cracking activity and the function of inhibiting coking. The preparation method of the catalyst is simple, does not contain precious metals, and has low cost Low.

Description

technical field [0001] The invention relates to a dual-function catalyst for hydrothermal cracking of residual oil, a preparation method of the catalyst, and a method for thermal cracking of residual oil by using the catalyst. Background technique [0002] The increasingly heavy and inferior oil resources in the world and the contradiction between the rapid economic growth and the increasing demand for petroleum products have made refineries pay more and more attention to the technology of lightening heavy oil. The cracking process has strong competitiveness and good development prospects because it can deal with low-quality raw materials with high carbon residue and high metal content. Catalyst is one of the core technologies of residual oil hydrothermal cracking process. It is very important for reducing reaction severity, improving reaction efficiency, increasing oil yield, reducing coke yield, thereby reducing residual oil processing cost and improving its economic compe...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745C10G47/12
Inventor 王卫平龙军王子军申海平吴治国王蕴王鹏飞
Owner CHINA PETROLEUM & CHEM CORP