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Catalytic cracking diesel oil conversion technology and system

A catalytic cracking diesel oil and process technology, which is applied in the petroleum industry, hydrotreating process, hydrocarbon oil treatment, etc.

Active Publication Date: 2017-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the existing catalytic cracking diesel oil conversion device, the present invention provides a catalytic cracking diesel oil conversion process and system. The process can effectively meet the requirements of the catalytic diesel oil hydrogenation conversion process in the initial and middle stages of operation through the switchable operation design of the heating furnace. , The different requirements for refining and cracking reaction temperatures in the later stage shorten the initial stabilization time of the catalytic diesel conversion unit and reduce the cost

Method used

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  • Catalytic cracking diesel oil conversion technology and system
  • Catalytic cracking diesel oil conversion technology and system
  • Catalytic cracking diesel oil conversion technology and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.6mol / L according to the liquid-solid ratio of 3:1, exchange at 80°C for 3 hours, repeat this process 3 times, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 2.0%;

[0038] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 650°C and 0.1MPa for 1 hour;

[0039] (3) The molecular sieve obtained in step (2) is prepared according to a liquid-solid ratio of 15:1 and a hydrochloric acid solution with a concentration of 0.8mol / L (concentration is expressed as H + meter) and mixed at 90°C for 2 hours at a constant temperature;

[0040] (4) The molecular sieve obtained in step (3) was dried at 130°C for 25 minutes;

[0041] (5) Soak the molecular sieve obtained in step (4) in hexadiene for 40 minutes, and then heat at 150°C for 25 hours in an air atmosphere;

[0042] (6) The molecular sieve obtained ...

Embodiment 2

[0046] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 1.5mol / L according to the liquid-solid ratio of 4:1, exchange at 80°C for 2 hours, repeat this process twice, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 2.5%;

[0047] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 640°C and 0.2MPa for 2 hours;

[0048] (3) The molecular sieve obtained in step (2) is prepared according to the liquid-solid ratio of 20:1 and the citric acid solution with a concentration of 1.5mol / L (concentration is represented by H + meter) and mixed at 85°C for 2 hours at a constant temperature;

[0049] (4) The molecular sieve obtained in step (3) was dried at 140°C for 8 minutes;

[0050] (5) Soak the molecular sieve obtained in step (4) in hexadiene for 40 minutes, and then heat at 150°C for 25 hours in an air atmosphere;

[0051] (6) The molecular sieve obtained in...

Embodiment 3

[0055] (1) Prepare W-Ni impregnation solution: take 480g of ammonium metatungstate and 480g of nickel nitrate and dissolve them in water to prepare 1000ml of impregnation solution. The active metal in the obtained impregnation solution is expressed as WO 3 and NiO content are calculated to be 33g / 100ml and 10g / 100ml respectively, and the solution number is RY;

[0056] (2) Mix 50g of modified Y molecular sieve I with 50g of macroporous alumina, add 4g / 100ml of dilute nitric acid, mix and roll in a mixer until it can be extruded, and extrude on an extruder to obtain carrier T-1;

[0057] (3) Take 60g of T-1 and add 120ml of RY impregnation solution to immerse for 2 hours, then dry at 120°C for 4 hours, and roast at 500°C for 3 hours to obtain a hydrocracking catalyst, numbered Cat-1.

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Abstract

The invention discloses a catalytic cracking diesel oil conversion technology and a system. The technology comprises the following steps: in the initial conversion period, mixing heat-exchanged catalytic cracking diesel oil with hydrogen and then entering into a refining area for performing hydrofining reaction, heating a reaction effluent by a heating furnace and then guiding into a cracking area for performing hydrocracking reaction and guiding the reaction effluent into a gas-liquid separating area; in the middle and later conversion periods, mixing the heat-exchanged catalytic cracking diesel oil with hydrogen and then heating by the heating furnace, guiding into a refining area for performing hydrofining reaction, directly guiding the reaction effluent into the cracking area for performing hydrocracking reaction, guiding the reaction effluent into the gas-liquid separating area for performing gas-liquid separation, guiding an acquired liquid phase into a distilling area and distilling the product. Through the switchable operation design for the heating furnace, the technology can effectively meet different requirements for refining and cracking reaction temperature in the initial, middle and later running periods of the catalytic cracking diesel oil conversion process, can shorten the stabilizing time in the initial running period of a catalytic diesel oil conversion device and can lower the cost.

Description

technical field [0001] The invention relates to a hydrocarbon hydrogenation treatment process and system, in particular to a catalytic cracking diesel conversion process and system. Background technique [0002] Since the beginning of the new century, with the increasing awareness of environmental protection, the stricter national environmental protection regulations and the rapid development of the national economy, the demand for clean motor fuels has been increasing all over the world. Catalytic cracking (FCC) technology is one of the main technological means for lightening heavy oil, and it occupies a relatively important position in oil refining enterprises all over the world. The annual processing capacity of catalytic cracking units in my country has exceeded 100 million tons, second only to the United States. In the composition of gasoline and diesel products, catalytic cracking gasoline accounts for about 80%, and catalytic diesel oil accounts for about 30%. In re...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2400/02C10G2400/04
Inventor 柳伟杜艳泽秦波高杭张晓萍董立廷贝耀明
Owner CHINA PETROLEUM & CHEM CORP