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

Hydrogenation and catalytic cracking combined method

A catalytic cracking and combined method technology, applied in hydrotreating process, petroleum industry, hydrocarbon oil treatment products, etc., can solve the problems of reducing the processing capacity and economic benefit of catalytic cracking unit, unsatisfactory cracking effect, and increasing the load of the regenerator. , to achieve the effects of excellent product quality, improved yield, and improved aromatics saturation rate

Active Publication Date: 2021-03-23
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, in order to increase the catalytic cracking conversion rate and light oil yield, the catalytic cracking unit usually circulates heavy cycle oil (HCO) in the catalytic cracking unit itself, but due to the high content of HCO aromatics, the cracking effect is not ideal. A large part of HCO is converted into coke, which increases the regenerator load and reduces the processing capacity and economic benefits of the catalytic cracking unit.

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
  • Hydrogenation and catalytic cracking combined method
  • Hydrogenation and catalytic cracking combined method
  • Hydrogenation and catalytic cracking combined method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0095] (1) Preparation of silica carrier:

[0096] After 3000 grams of Silica Gel 955 commercial silica gel (the product of Davison Chemical Company in the U.S., containing SiO 99.8% by weight) and 75 grams of scallop powder were mixed uniformly, then mixed with 84 milliliters of nitric acid (concentration 65-68%, analytically pure, Shantou Xilong Chemical Industry Co., Ltd. plant) and 4200 ml of water, and the mixture was kneaded evenly on a twin-screw extruder, and then extruded into a butterfly-shaped strip of ф1.3 mm. After the wet strip was dried at 120°C for 4 hours, it was roasted at 600°C for 3 hours. A silica carrier S is obtained. Adopt BETN 2 Adsorption method analysis, the specific surface area of ​​the carrier is 180m 2 / g, the pore volume is 0.78mL / g.

[0097] (2) Preparation of aromatics deep hydrogenation saturation catalyst:

[0098]Take 200 grams of silicon oxide carrier S, impregnate with 200 milliliters of dilute ammonia solution (10% concentration) con...

Embodiment 1

[0102] use figure 1 In the process flow shown, catalytic cracking light cycle oil (LCO) passes through the first hydrogenation reactor, and successively contacts and reacts with hydrogenation protection agent A and aromatics deep hydrogenation saturation catalyst F (loading volume ratio is 4:5:40) , after the hydrogenation distillate oil of the first hydrogenation reactor is mixed with the wax oil raw material I, enter the second hydrogenation reactor and successively in the first hydrogenation reaction zone and hydrogenation protection agent B1, hydrogenation protection agent B2, hydrogenation Demetallization catalyst D (loading volume ratio: 10:10:80) contact reaction, contact reaction with hydrodesulfurization catalyst E in the second hydrogenation reaction zone, and contact reaction with hydrodesulfurization and denitrogenation catalyst H in the third hydrogenation reaction zone reaction. The liquid product enters the fractionation system for further separation to obtain ...

Embodiment 2

[0107] use figure 1 In the process flow shown, catalytic cracking heavy cycle oil (HCO) passes through the first hydrogenation reactor, and is sequentially mixed with hydrogenation protection agent A, hydrogenation protection agent B and aromatics deep hydrogenation saturation catalyst F (loading volume ratio is 2: 4:25) contact reaction, after the hydrogenated distillate oil in the first hydrogenation reactor is mixed with the wax oil raw material I, it enters the second hydrogenation reactor in turn in the first hydrogenation reaction zone and hydrogenation protection agent A, hydrogenation Protective agent B, hydrodemetallization catalyst C (filling volume ratio is 5:20:75) contact reaction, contact reaction with hydrodesulfurization catalyst E in the second hydrogenation reaction zone, and hydrogenation reaction in the third hydrogenation reaction zone H contact reaction of desulfurization and denitrogenation catalyst. The liquid product enters the fractionation system fo...

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a hydrogenation and catalytic cracking combined method, which comprises the steps that catalytic cracking distillate oil enters a first reaction zone to carry out an aromatic hydrocarbon deep hydrogenation saturation reaction so as to obtain hydrogenated distillate oil; the obtained hydrogenated distillate oil and wax oil distillate are mixed and then sequentiallyenter a second reaction zone, a third reaction zone and a fourth reaction zone for hydrodemetallization, hydrodesulfurization, hydrodesulfurization and denitrification and other reactions, and then separation is conducted to obtain a gas product, hydrogenated naphtha, hydrogenated diesel oil and hydrogenated tail oil; the obtained hydrogenated diesel oil is introduced into a first cracking reaction zone of a catalytic cracking reactor to be in contact with a catalytic cracking catalyst, and a first catalytic cracking reaction is carried out to obtain a reaction oil agent; and the hydrogenatedtail oil is introduced into a second cracking reaction zone to be in contact with the reaction oil agent from the first cracking reaction zone, and a second catalytic cracking reaction is carried outto obtain a reaction product and a spent catalyst. The method is beneficial to improving the yield of isobutane in a catalytic cracking unit and increasing the content of aromatic hydrocarbon in gasoline.

Description

technical field [0001] The invention relates to a combined method of hydrogenation and catalytic cracking. Background technique [0002] In my country, catalytic cracking has been widely used due to its good operational flexibility, high gasoline yield and low one-time investment. A single catalytic cracking process has certain requirements for catalytic raw materials. Raw materials with high sulfur content not only make SOx emissions in catalytic cracking flue gas not meet environmental protection requirements, but also the sulfur content of gasoline products cannot meet product specifications. High nitrogen content in catalytic cracking feedstock will increase the consumption of cracking catalysts and increase operating costs. The hydrogenation pretreatment technology of catalytic cracking raw materials can greatly reduce its sulfur and nitrogen content and increase its hydrogen content, thereby reducing the sulfur and nitrogen content of cracked products and improving pr...

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 Applications(China)
IPC IPC(8): C10G69/00
CPCC10G69/00C10G2400/02C10G2300/1037C10G2300/202C10G2300/70C10G2400/28C10G2400/26C10G2400/30
Inventor 张毓莹梁家林许友好龚剑洪陈文斌董松涛许双辰刘涛戴立顺
Owner CHINA PETROLEUM & CHEM CORP