Catalytic conversion method capable of reducing benzene content of gasoline
A catalytic conversion method and technology for benzene content, which are applied in the field of catalytic conversion for reducing gasoline benzene content, can solve the problems of complicated separation process, reduce gasoline yield, increase equipment investment, etc. The effect of octane improvement
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Embodiment 1
[0043] This example illustrates the use of the method provided by the present invention.
[0044] use figure 1 In the shown process, the benzene-containing gasoline A listed in Table 1 is used as the reaction raw material, methanol (Beijing Chemical Plant, purity ≥ 99.5%) is used as the alkylating agent, and Y-type molecular sieves (catalyst a in Table 2 for properties) are used as the reaction material. Catalyst, in variable diameter riser (the first reaction zone diameter of variable diameter riser is 0.25 meters, height is 4 meters; The second reaction zone diameter is 1 meter, and height is 6.5 meters, and the first reaction zone is positioned at the second reaction zone The lower part, if no special instructions in the following examples, all adopt the catalytic conversion reaction of gasoline and methanol in this variable diameter riser) to produce low benzene gasoline.
[0045]The mixture of benzene-containing gasoline A and methanol and preheated 200°C high-temperatur...
Embodiment 2
[0048] use figure 1 Shown technique, with the listed benzene-containing gasoline B of table 1 as reaction raw material, methyl alcohol (Beijing Chemical Plant, purity ≥ 99.5%) is used as alkylating agent, uses ZSM-5 type molecular sieve (property sees catalyst b in table 2 ) as a catalyst, the catalytic conversion reaction of gasoline and methanol is carried out in the variable-diameter riser to produce low-benzene gasoline.
[0049] The mixture of benzene-containing gasoline B and methanol and preheated high-temperature steam is mixed into the first reaction zone of the variable-diameter riser. The reaction temperature in the first reaction zone is 300°C, and the weight ratio of the catalyst to the total liquid feed is 6. The weight ratio of methanol to benzene-containing gasoline is 0.20:1, the residence time of the total liquid feed is 2s, and after contacting with the catalyst under the conditions of 10% by weight of water injection (accounting for the total liquid feed), ...
Embodiment 3
[0052] use figure 1 In the shown technique, the gasoline C containing benzene listed in Table 1 is used as the reaction raw material, methanol (Beijing Chemical Plant, purity ≥ 99.5%) is used as the alkylating agent, and ZSM-5 type molecular sieves are used (see catalyst b in Table 2 for properties). ) as a catalyst, the catalytic conversion reaction of gasoline and methanol is carried out in the variable-diameter riser to produce low-benzene gasoline.
[0053] The mixture of benzene-containing gasoline C and methanol and preheated high-temperature steam is mixed into the first reaction zone of the variable-diameter riser. The reaction temperature in the first reaction zone is 500°C, and the weight ratio of the catalyst to the total liquid feed is 6. The weight ratio of methanol to benzene-containing gasoline is 0.125: 1, the residence time of the total liquid feed is 2s, and after contacting with the catalyst under the conditions of 5% by weight of water injection (accounting...
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Abstract
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