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Petroleum hydrocarbon catalytic conversion method

A catalytic conversion method and a technology for petroleum hydrocarbons, which are applied in the field of catalytic conversion of petroleum hydrocarbons, can solve problems such as ineffective contact problems, and achieve the effects of reducing the yield of dry gas, reducing the proportion of thermal cracking, and increasing the amount of circulation.

Active Publication Date: 2006-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But all of these catalyst mixing methods are not very effective in solving the problem of contacting the feedstock and catalyst at lower temperatures for longer periods of time

Method used

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  • Petroleum hydrocarbon catalytic conversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach A

[0020] Implementation mode A: such as figure 1 As shown, for the variable-diameter riser reactor described in ZL99105903.4, a mixing zone is set at the bottom of the reactor. Its structural features are: along the vertical direction from bottom to top, there are mutually coaxial mixing zone, pre-lifting section, first reaction zone, second reaction zone with enlarged diameter, and outlet zone with reduced diameter. The size of the mixing zone is equivalent to the stripper in the catalytic cracking unit, which is coaxial with the riser and placed at the bottom of the riser. The high-temperature regenerant from the regenerator and the carbonized agent returned from the second reaction zone are mixed in the mixing zone, and the mixture is then contacted with raw oil to react, which can increase the ratio of agent to oil and reduce the dry gas yield; the above-mentioned mixture It goes up with oil and gas, reacts, and enters the second reaction zone. A part of the second reactio...

Embodiment approach B

[0021]Embodiment B: For a combined riser + fluidized bed reactor (the fluidized bed is located at the top of the riser), a mixing zone is set at the bottom of the reactor. Its structural features are: along the vertical direction from bottom to top, there are mutually coaxial mixing zone, riser (first reaction zone), fluidized bed (second reaction zone). The size of the mixing zone is equivalent to that of the stripper in the catalytic cracking unit, which is coaxial with the riser and placed at the bottom of the riser. The high-temperature regenerant from the regenerator and the carbonized agent returned from the second reaction zone are mixed in the mixing zone, and the mixture is then contacted with raw oil to react, which can increase the ratio of agent to oil and reduce the dry gas yield; the above-mentioned mixture And the reaction oil gas ascends, reacts, and enters the second reaction zone. A part of the second reaction zone carries the carbon agent back to the mixing...

Embodiment

[0027] This example illustrates: the product distribution and product properties obtained by the catalytic conversion reaction of hydrocarbon oil by using the method provided by the present invention.

[0028] The process flow of a medium-sized catalytic cracking unit is as follows: figure 1 As shown, the preheated raw oil is injected into the first reaction zone of the reactor through the pipeline 7, and contacts and reacts with the mixture in the reaction zone. The 700°C regenerant is mixed in the mixing zone at a ratio of 0.05:1, and the bed density in the mixing zone is 300kg / m 3 . The reaction temperature in the first reaction zone is 545°C, the reaction time is 1 second, and the ratio of solvent to oil is 5.5:1. The mixture of oil gas and catalyst goes up into the second reaction zone, and a part of the spent catalyst is returned from the stripping section to enter the second reaction zone. The ratio of the mass flow rate of the returned spent catalyst to the mass flow...

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Abstract

The catalysis conversion method for petroleum hydrocarbon comprises: in a reactor with a mixing zone, a first and second reaction zone, forcing regenerative agent and carry-carbon agent from second zone into mixing zone and flow into first zone by pre-hoisting medium; in the first zone, contacting and reacting between the material oil and said mixed agents, making the oil-agent mixed material up to second zone for continuing reaction; returning some reacted carry-carbon agent to mixing zone for recycle; separating reacted oil-gas to send to subsequent separation system and other catalysts for recycle after steam stripping. This invention reduces dry gas yield, strengens the hydrogen-transfer reaction, and decreases the olefin content.

Description

technical field [0001] The invention belongs to a method for catalytic conversion of petroleum hydrocarbons in the absence of hydrogen, more specifically, a method for catalytic conversion of petroleum hydrocarbons which improves the contact effect of oil agents. Background technique [0002] Fluid catalytic cracking is achieved by contacting petroleum hydrocarbons and catalysts in a fluidized bed reactor. As the reaction progresses, a large amount of coke is generated and deposited on the catalyst to form a standby catalyst. The standby catalyst is circulated to the regenerator, and is burned in contact with air at high temperature. After being burnt, a regenerated catalyst is formed, and the regenerated catalyst is returned to the reactor to continue. Re-react with fresh raw oil. The fluidized circulation of the catalyst can be realized through various gaseous media. [0003] Although the fluid catalytic cracking process is relatively mature, people are still trying to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/18
Inventor 龚剑洪许友好张久顺龙军
Owner CHINA PETROLEUM & CHEM CORP
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