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Low-grade heavy oil contact agent and preparation method and application thereof

A low-quality heavy oil and contact agent technology, which is applied in the fields of hydrocarbon oil cracking, petroleum industry, and hydrocarbon oil treatment, can solve the problems of uneven distribution of coke particle size, increase of coke and dry gas yield, and low added value, and achieve Avoid secondary cracking and condensation reactions, reduce coke and dry gas yield, reduce the effect of dry gas and coke yield

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this process adopts high-temperature gasification, which requires high energy consumption. On the other hand, the CO and H in the produced gas 2 The content is relatively low, the calorific value is low, and its added value is also very low
Both use the coke core as the fluidization medium, and at the same time as the carrier of coke and heat. There are problems such as uneven particle size distribution of coke particles, which are prone to large agglomerates and fine coke powder, which affect the fluidization effect.
[0005] In the above-mentioned prior art, after the hot contact agent contacts the cold raw material oil, the gasification and liquid phase reaction time of the raw material is too long, resulting in more liquid phase reactions, thus increasing the yield of coke and dry gas
[0006] In addition, for the fluidized processing of residual oil, especially the vacuum residual oil with a high boiling point, after entering the fluidized reactor, after the liquid and solid contact, it is easy to agglomerate and affect the fluidization
It can be seen from the disclosed prior art related to the fluidized processing of inferior residual oil that petroleum coke or quartz sand are used as fluidized particles, and because of the small pore diameter and pore volume of these particles, it is easy to cause agglomeration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Using SiC, which accounts for 90% of the total weight of the contact agent and has an average particle size of 20 μm, as the nucleus of the contact agent, the pseudo-boehmite is mixed with enough water and acid to make it slurry under stirring, wherein the amount of acid is such that the acid The weight ratio of alumina to pseudo-boehmite is 0.05, and the material used as the core of the contact agent is added to the pulped pseudo-boehmite, stirred for 38 minutes, and then kaolin with an average particle size of 5 μm is added, stirred 40min, then spray-dried and calcined at 580°C for 4h, the pore volume of >20nm pores was 0.39cm 3 / g, the thermal conductivity is 30K / (m·K), the average particle size is 65μm, and the contact agent is recorded as MFC-1.

Embodiment 2

[0052] AlN, which accounts for 70% of the total weight of the contact agent and has an average particle size of 28 μm, is used as the nucleus of the contact agent, and the pseudo-boehmite is mixed with enough water and acid to make it slurry under stirring, wherein the amount of acid is such that the acid The weight ratio of alumina to pseudo-boehmite is 0.1, and the material used as the nucleus of the contact agent is added to the pulped pseudo-boehmite, stirred for 50 minutes, and then MgO with an average particle size of 10 μm is added, stirred 30min, then spray-dried and calcined at 550°C for 3h, the prepared contact agent has a specific surface area of ​​100m 2 / g, the pore volume is 0.32cm 3 / g, a contact agent with a macropore diameter of 80nm, a mesopore diameter of 25nm, a thermal conductivity of 32K / (m K), and an average particle size of 200μm. The contact agent is recorded as MFC-2.

Embodiment 3

[0054] MgAl, which accounts for 80% of the total weight of the contact agent and has an average particle size of 10 μm 2 o 4 As a contact agent nucleus, pseudo-boehmite is mixed under stirring with water sufficient to slurry it, and an acid in such an amount that the weight ratio of the acid to alumina in the pseudo-boehmite is 0.3, and Add the material as the nucleus of the contact agent into the slurryed pseudo-boehmite, stir for 30 minutes, then add 50% rector soil column clay molecular sieve and 50% ZSM-5 molecular sieve with an average particle size of 15 μm, and stir 40min, then spray-dried and calcined at 600°C for 5h to obtain >10nm pores with a pore volume of 0.21cm 3 / g, the thermal conductivity is 20K / (m·K), and the average particle size is 100μm, the contact agent is recorded as MFC-3.

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Abstract

The invention relates to a low-grade heavy oil contact agent and a preparation method and application thereof. The contact agent has the following characteristics that: (1) the volumes of pores of more than or equal to 10nm are more than or equal to 0.10cm<3> / g; (2) the thermal conductivity of the contact agent is more than or equal to 10K / (m.K). Under the action of the contact agent, low-grade heavy oil is rapidly heated and cracked, the generated distillate can be distilled off from a reactor and then is rapidly cooled, and the coke-deposited contact agent enters a gasification unit. In the presence of a gasifying agent containing water and oxygen, the coke on the contact agent reacts with the gasifying agent to obtain a regenerated contact agent and a gasified gas rich in CO and H2, and sulfur in the gasified gas mainly exists in H2S and COS forms. Through the contact agent and the use method thereof, low-grade residual oil can be well fluidized in a cracking reactor, and the generation of a dry gas and coke is reduced, so that the coke is efficiently utilized, and meanwhile, the sulfur is converted into easily recycled H2S.

Description

technical field [0001] The invention relates to a contact agent, more specifically to a contact agent used in the processing of inferior heavy oil and its preparation method and application. Background technique [0002] In recent years, petroleum resources have become increasingly heavy, and the content of residual carbon, sulfur and metals has increased. The residual catalytic cracking feedstock requirement (Ni+V) <25μg·g -1 , generally 10 μg·g -1 There are also restrictions on sulfur content. For example, the residual oil fluidized catalytic cracking (RFCC) process of Shiwei Company requires that the sulfur content in the feedstock oil be 0.2-2.4% (by mass), so the problem of inferior heavy oil or residual oil processing is becoming more and more prominent. The shortage of oil resources, high international oil prices, poor quality of oil resources, heavy oil and increasingly stringent environmental protection requirements have brought new challenges to oil refining t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/00C10G47/00
CPCC10G11/00C10G47/00C10G2300/1033
Inventor 龙军张书红王子军申海平朱玉霞
Owner CHINA PETROLEUM & CHEM CORP