Technical Classification and Characteristics of Catalytic Cracking

Technology 1 -- High-octane gasoline catalytic cracking technology for prolific production of liquefied gas (MGG/ARGG)

(1) Wide range of raw materials, which can process various heavy raw materials of conventional FCC;

(2) Taking both oil and gas into consideration, the product distribution and product properties have both normal cracking zone (low dry gas and coke yield, good gasoline stability) and overcracking zone (high liquefied gas yield, high olefin content and high olefin content of liquefied gas). common advantages of high octane gasoline);

(3) RMG and RAG series catalysts with high activity, good hydrothermal stability, outstanding heavy oil conversion ability, strong resistance to heavy metal pollution and good olefin selectivity;

(4) The technology can be implemented in the existing catalytic cracking unit using a riser reactor;

(5) The process conditions and operation methods can be changed, and the product structure can be flexibly adjusted.

Technology 2 -- Productive liquefied gas and diesel catalytic cracking technology (MGD)

(1) Using staged feeding, selective cracking technology and controlled gasoline cracking technology, multiple zones with different reaction depths are formed in the riser reactor. react;

(2) It can produce more liquefied gas, propylene and diesel oil, reduce the olefin and sulfur content of catalytic gasoline, and increase the octane number;

(3) It has a high degree of operational flexibility and product flexibility, can choose different production plans, flexibly adjust the product structure, and the adjustment time is short, generally within 8 to 24 hours, the product yield will change greatly.

Technology 3 -- Productive isoparaffin catalytic cracking technology (MIP)

(1) Adopt a series riser reactor system, which contains two reaction zones of cracking and conversion (isomerization, hydrogen transfer, alkylation);

(2) Use the relatively low reaction temperature/long reaction time reaction mode to replace the conventional FCC high temperature/short reaction time operation mode;

(3) Increase the isoparaffin content in light products and reduce the olefin content in gasoline to below 35%.

Technology 4 -- Productive isoolefin catalytic cracking technology (MIO)

(1) Use the supporting and patented catalyst RFC and specific process conditions;

(2) The yield of gasoline with RON of 93 can reach 40.8%, and the stability is good;

(3) The produced diesel can be used as a diesel component after hydrogenation;

(4) The energy consumption of the device is slightly higher than that of the conventional FCC.

Technology 5 -- Deep Catalytic Cracking (DCC)

(1) The reaction system of the device has two types of riser plus fluidized bed (DCC-I type, the maximum amount of propylene operation mode) or riser (DCC-II type, the maximum amount of isomerized olefin operation mode), which can process more It is a kind of heavy raw material, and is especially suitable for processing paraffin-based raw materials, and the propylene yield can reach 20%;

(2) The gasoline produced can be used as a high-octane gasoline component, and the middle distillate oil can be used as a fuel oil component;

(3) Using matching and patented catalysts, the reaction temperature is higher than that of conventional FCC, but much lower than that of steam cracking;

(4) The operation is flexible, and the DCC operation mode can be changed by changing the operating parameters;

(5) Although there are a large number of gas products in this process, the fractionation/absorption system can still be used to realize the separation/recovery of the products, and the cryogenic separation used in the steam cracking ethylene production process is not required;

(6) The impurity content in the olefin product is low, and no hydrorefining is required.

Technology 6 -- Catalytic cracking technology (CGP) for producing clean gasoline and prolific propylene

(1) Raw materials include vacuum gas oil (VGO), vacuum residual oil (VTB), deasphalted oil (DAO), etc.;

(2) A series variable diameter riser reactor system with two different reaction zones is used. The function of the first reaction zone is mainly to strengthen the monomolecular reaction, which is beneficial to the monomolecular cracking of the raw macromolecular alkane, and the function of the second reaction zone It is mainly to strengthen the bimolecular reaction of the raw macromolecular alkane. Under the synergistic effect of the bimolecular cracking reaction and the bimolecular hydrogen transfer reaction, the olefins in the gasoline are converted into isoparaffins and propylene, thereby significantly reducing the olefin content in the gasoline;

(3) A multifunctional catalyst with gradient acid strength and gradient pore distribution is adopted. One of the active components in the catalyst has stronger acid strength than conventional active components, and has a specially designed suitable pore size. Adopt new matrix and functional components to optimize the collection technology, so that its acid strength, acid content and carbon capacity can meet the needs of monomolecular and bimolecular reactions;

(4) A new type of pre-lifting structure is adopted at the bottom of the first reaction zone, which can improve the flow state of the catalyst and the raw oil before contacting, and achieve more uniform contact, thereby reducing the side reaction of thermal cracking and strengthening the single-molecule cracking reaction. A patented special-shaped low-pressure distribution plate is used between the second reaction zone and the second reaction zone to increase the catalyst storage and catalyst concentration in the second reaction zone, thereby strengthening the bimolecular reaction;

(5) Adopting a high-efficiency stripping section with a new structure can significantly increase the catalyst density in the stripping section, thereby improving the stripping effect, which is beneficial to the bimolecular reaction in the second reaction zone. Production process: The hot raw material oil and the hot regeneration catalyst are contacted at the bottom of the riser, and then enter the first reaction zone. At high temperature, the oil agent realizes short-term contact and reacts and then enters the second reaction zone, where the oil and gas stay at a lower temperature and longer. The oil and gas continue to react under the time and lower weight hourly space velocity, and the reacted stream enters the coarse swirl to separate the oil and gas and the catalyst, and the oil and gas enter the rear separation system. After the raw catalyst is stripped, part of it is returned to the second reaction zone, part of it is regenerated, and the regenerated catalyst is returned to the bottom of the riser.

Technology 7 -- Flexible multi-effect catalytic cracking process technology (FDFCC-III)

(1) Strong adaptability of raw materials, flexible adjustment of product structure, high yield of high value-added products, good quality of gasoline products, and low SOX emissions;

(2) The olefin content of catalytic gasoline can be reduced to less than 18%;

(3) The S content of catalytic gasoline is reduced by more than 45%, and RON and MON are respectively increased by more than 2 units;

(4) SOX emissions in flue gas are reduced by more than 50%;

(5) The olefin yield can reach more than 10% (w), the dry gas yield is about 3.0% (w), and the propylene content in the liquefied gas is more than 37% (w).