Method for catalyzing and cracking petroleum hydrocarbon in relaying mode

A catalytic cracking, petroleum hydrocarbon technology, applied in catalytic cracking, chemical instruments and methods, cracking, etc., can solve the problems of increased equipment renovation costs, complicated processes, and increased difficulty in device operation, and can reduce the yield of coke and dry gas. , the effect of cost reduction and temperature drop reduction

Inactive Publication Date: 2003-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will greatly increase both the construction cost of the device and the transformation cost of the equipment.
In addition, in the actual industrial production process, due to the complexity of the process, the operation difficulty of the device will increase a lot

Method used

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  • Method for catalyzing and cracking petroleum hydrocarbon in relaying mode
  • Method for catalyzing and cracking petroleum hydrocarbon in relaying mode
  • Method for catalyzing and cracking petroleum hydrocarbon in relaying mode

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This example illustrates that using heavy petroleum hydrocarbons as raw materials, the relay cracking method provided by the present invention can obtain higher yields of liquefied gas, gasoline and diesel oil.

[0033] The main test steps are as follows: as shown in Figure 3, the regenerant enters the bottom of the jacketed reactor through the catalyst inlet pipe 1, and flows upward under the action of the pre-lift steam, 70% by weight of the catalyst flows into the inner pipe 2, and the rest 30% by weight of the catalyst enters the annular reaction space between the inner tube 2 and the outer tube 3, and continues to flow upwards under the action of the pre-lift steam; the raw material oil shown in Table 1 is injected into the reactor through the nozzle 8 after being preheated In the inner tube of the catalyzer, it contacts and reacts with the catalyst, and the reactant flow continues to flow upward along the wall; The regenerants in the reaction space meet and react,...

Embodiment 2

[0036] This example shows that using heavy petroleum hydrocarbons as raw materials, the relay cracking method provided by the present invention can obtain relatively high yields of propylene and other low-carbon olefins.

[0037] The main test steps are as follows: as shown in Figure 4, the regenerant enters the inner tube 2 of the double-path injection sleeve reactor through the catalyst inlet pipes 21 and 22, and the annular reaction space between the inner tube 2 and the outer tube 3, And it flows upward under the action of the pre-lift medium. The catalyst flowing into the inner tube accounts for 40% of the total catalyst, and the catalyst flowing into the annular space accounts for 60%. The hydrocarbon oil feedstock is injected into the inner tube of the reactor through the nozzle 8, contacts and reacts with the catalyst, and the mixture of reaction oil gas and catalyst flows upward along the wall of the reactor. The reactant flow in the inner pipe merges and reacts with...

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Abstract

A relay-type catalytic cracking process for pertroleum hydrocarbon includes such steps as feeding the regenerating agent in the internal tube and the ring reactino space between internal and external tubes of reactor while flowing upward, feeding raw hydrocarbon oil in internal tube, contacting with catalyst for reaction, flowing the rsultant upward, aggregating the resultant with the regenerating agent from internal tube, reaction, gas-solid separation, feeding oil gas iater separating system, and regenerating catalyst for cyclic use. Its advantage is high reaction activity and selectivity.

Description

technical field [0001] The invention belongs to a method for catalytic cracking of petroleum hydrocarbons in the absence of hydrogen, more specifically, a catalytic cracking method for relay cracking of hydrocarbon oil by using a casing reactor. Background technique [0002] In the conventional catalytic cracking process, the raw oil is atomized with water vapor and sprayed into the riser, where it contacts the high-temperature catalyst (600-700°C) from the regenerator, and then vaporizes and reacts. The residence time of oil and gas in the riser is very short, generally only a few seconds. The reaction product is separated from the entrained catalyst by the cyclone separator and then leaves the reactor to the fractionation tower. The catalyst with coke (called spent catalyst) falls into the stripping section below from the settler. The stripping section is equipped with multi-layer herringbone baffles and superheated steam is introduced at the bottom, and the oil gas adso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/08C10G11/00C10G11/16
Inventor 张瑞驰谢朝钢张久顺高永灿
Owner CHINA PETROLEUM & CHEM CORP
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