Method for preparing low carbon olefin by coupled catalytic cracking of petroleum hydrocarbon
A technology of catalytic cracking and low-carbon olefins, applied in the field of coupled catalytic cracking of petroleum hydrocarbons, can solve problems such as high energy consumption and complex equipment, and achieve the effects of reducing energy consumption, improving utilization rate, and reducing scale
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Embodiment 1-3
[0030] Examples 1-3 illustrate the reaction effect of producing light olefins by catalytic cracking of heavy oil coupled with methanol.
[0031] Catalyzed cracking was carried out on a small-scale fixed fluidized bed (equipment identical to Comparative Example 1-3) with a catalyst loading of 200 grams using Daqing atmospheric residue (reaction raw material the same as Comparative Example 1-3) and methanol as raw materials. Table 6 is the physical and chemical properties of raw methanol in the examples. Table 7 shows the yield of main products and the decrease of reactor bed temperature in heavy oil catalytic cracking coupled with methanol. The composition yield of each product is the ratio of the mass of each product collected after the reaction to the mass of the feed atmospheric residue plus the theoretical amount of methanol fully converted to ethylene. The reaction temperature drop is the maximum drop in temperature of the catalyst bed during the reaction.
[0032] ...
Embodiment 4
[0035] This example illustrates the reaction effect of catalytic cracking of light gasoline coupled with methanol to produce light olefins.
[0036] The catalytic cracking light gasoline (fraction -1 , Catalyst: atmospheric residue oil weight ratio is 20:1, water: atmospheric pressure residue oil weight ratio is 0.7:1, methanol: atmospheric pressure residue oil weight ratio is 0.4:1. Table 8 shows the main product yield and reactor bed temperature decrease °C after catalytic cracking. The composition yield of each product is the ratio of the mass of each product collected after the reaction to the mass of the feed atmospheric residue plus the theoretical amount of methanol fully converted to ethylene. The reaction temperature drop is the maximum drop in temperature of the catalyst bed during the reaction.
[0037] composition
Embodiment 5
[0039] This example illustrates the reaction effect of heavy oil catalytic cracking coupled with dimethyl ether / methanol to produce light olefins.
[0040] With Daqing atmospheric residual oil (reaction raw material is the same as comparative example 1) and dimethyl ether / methanol mixture as raw material, carry out on the small-scale fixed fluidized bed (equipment identical with comparative example 1-3) that catalyst loading is 200 grams Catalytic cracking reaction. Catalyst A is used for coupling catalytic cracking, the reaction temperature is 630°C, catalyst: atmospheric residue weight ratio is 20:1, water: atmospheric residue weight ratio is 0.49:1, (alcohol+ether): atmospheric residue weight ratio is 0.38 : 1, dimethyl ether: methanol weight ratio 1: 1, heavy oil feed space velocity 3.7h -1 . Table 9 shows the yield of main products of coupled heavy oil catalytic cracking and the decrease of reactor bed temperature. The composition yield of each product is the ratio of ...
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