Catalytic conversion method for extracting isobutane and gasoline richly containing isoparaffin
A catalytic conversion method and isoparaffin technology, which is applied in the field of catalytic conversion to produce isobutane and gasoline rich in isoparaffins, and can solve the problem of low catalyst density, poor initial contact effect of oil agent, and insufficient cracking capacity of hydrocarbon oil raw materials Ideal and other problems, to achieve the effect of reduced yield, good product distribution, and increased yield
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Embodiment approach 1
[0024] Embodiment 1: A downward-flowing reactor of equal diameter is adopted. The hot catalyst flows into the reactor from the top of the reactor through the catalyst distributor, and contacts with the injected preheated raw material oil to vaporize the raw material oil and undergo a cracking reaction. The catalyst injected into the middle of the reactor is mixed and contacted and undergoes catalytic reaction, and is returned to the top of the reactor 3 for recycling, and the other part is preferably returned to the reactor 20 through the catalyst cooler 15 and the delivery pipe 6 .
[0025] Fig. 4 is a process for producing isobutane and gasoline rich in isoparaffins by using uplink and downlink reactors in series. The hot regenerated catalyst enters the bottom part of uplink reactor 21 through regeneration inclined pipe 1. The preheated raw oil enters from the top of the reactor in a certain proportion through the pipeline 4 and the atomized steam from the pipeline 5, mixes a...
specific Embodiment approach
[0026] The preheated hydrocarbon oil raw material is injected into the first reaction zone, contacted with the hot catalyst and reacted under the following conditions: reaction temperature 530-620°C, preferably 550-600°C; reaction pressure 0.2-1.2MPa, preferably 0.2- 1.0Mpa; reaction time 0.1-2.0 seconds, preferably 0.2-1.0 seconds; agent-to-oil ratio 5-18, preferably 6-15; water vapor to feed oil weight ratio 0.05-0.3:1, preferably 0.06-0.25:1. The mixture of reaction oil gas and catalyst enters the second reaction zone through the first reaction zone, mixes with the quenching medium injected into the reaction zone, descends, and reacts under the following conditions: the reaction temperature is 420-550°C, preferably 460-500°C °C; reaction pressure 0.2-1.2MPa, preferably 0.2-1.0Mpa; reaction time 1.0-20.0 seconds, preferably 2.0-10.0 seconds; agent-to-oil ratio 5-30, preferably 6-25; water vapor to feedstock oil weight ratio at the bottom of the reactor , in contact with the ...
Embodiment 1
[0029] This example illustrates the use of the method provided by the present invention to produce isobutane and gasoline rich in isoparaffins in a medium-sized descending reactor with equal diameter.
[0030] The preheated raw material oil D enters the down-flow reactor, and in the presence of water vapor, it contacts with the hot cracking catalyst C, and at the same time, the regenerated catalyst after being cooled by the cooler enters the reactor at a height 40% higher than that of the reactor under the steam lift. place, contact with the catalyst and oil gas in the reactor, and separate the reaction products to obtain liquefied gas rich in isobutane and gasoline and other products rich in isoparaffins. The raw catalyst is stripped and enters the regenerator. It is divided into two parts, one part is returned to the top of the reactor for recycling, and the other part is cooled and returned to the middle of the reactor for recycling.
[0031] The operating conditions and pr...
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