Petroleum hydrocarbon catalytic conversion method

A catalytic conversion method and a technology for petroleum hydrocarbons, which are applied in the field of catalytic transformation of petroleum hydrocarbons, can solve problems such as ineffective contact problems, and achieve the effects of reducing dry gas yield, improving product properties, and enhancing gas-solid contact efficiency.

Active Publication Date: 2007-08-22
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] Embodiment A: As shown in Figure 1, for the variable-diameter riser reactor described in ZL99105903.4, a mixing zone is provided at the bottom of the reactor. Its structural characteristics 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, coaxial with the riser, and placed at the bottom of the riser. The high-temperature regenerant from the regenerator and the carbon-carrying agent returned from the second reaction zone are mixed in the mixing zone, and the admixture contacts and reacts with the feed oil, which can increase the agent-to-oil ratio and reduce the dry gas yield; Ascends and reacts with oil and gas, and enters the second reaction zone. Part of the second reaction zone with charcoal agent returns to the mi...

Embodiment approach B

[0021]Embodiment B: For a riser + fluidized bed combined reactor (the fluidized bed is located at the top of the riser), a mixing zone is provided at the bottom of the reactor. Its structural characteristics are: along the vertical direction from bottom to top, there are mutually coaxial mixing zone, riser (first reaction zone), and fluidized bed (second reaction zone). The size of the mixing zone is equivalent to the stripper in the catalytic cracking unit, coaxial with the riser, and placed at the bottom of the riser. The high-temperature regenerant from the regenerator and the carbon-carrying agent returned from the second reaction zone are mixed in the mixing zone, and the mixture is contacted and reacted with the feed oil, which can increase the agent-to-oil ratio and reduce the dry gas yield; And the reaction oil and gas move upward, react, and enter the second reaction zone. Part of the second reaction zone with charcoal agent returns to the mixing zone. The remaining catal...

Embodiment

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

[0028] The process flow of the medium-sized catalytic cracking unit is shown in Figure 1. The preheated feed oil is injected into the first reaction zone of the reactor through line 7, and contacts and reacts with the mixing agent in the reaction zone. The mixing agent is produced from the second reaction zone. The 495℃ charcoal agent and 700℃ regenerant returned from the zone are mixed in the mixing zone at a ratio of 0.05:1. 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 catalyst-oil ratio is 5.5:1. The mixture of oil and gas and catalyst goes upward into the second reaction zone, and returns part of the spent catalyst from the stripping section to the second reaction...

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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, and more specifically, is a method for catalytic conversion of petroleum hydrocarbons for improving the contact effect of oil agents. Background technique [0002] Fluidized 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 spent catalyst. The spent catalyst is recycled to the regenerator and burns in contact with air at high temperature. After being burnt, it forms a regenerated catalyst. The regenerated catalyst returns to the reactor to continue. React with fresh raw oil again. The fluidization cycle of the catalyst can be realized by various gas media. [0003] Although the fluid catalytic cracking process is relatively mature, people are still striving to find new technologies to ...

Claims

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Application Information

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Patent Type & Authority Patents(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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