Hydrocracking method for improving yield of heavy naphtha
A technology for hydrocracking and heavy naphtha, which is applied in the petroleum industry, hydrotreating process, processing hydrocarbon oil, etc., can solve the problem of not fully considering the enhanced conversion of hydrocarbons by partition and high yield, and reduce the cold hydrogen reserve. The effect of low energy consumption, low hydrogen consumption and load reduction
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Embodiment 1~3
[0031] Using Iranian VGO as raw material oil, FF-46 hydrocracking pretreatment catalyst is selected to match the catalyst system of hydrocracking catalyst I / hydrocracking catalyst II / hydrocracking catalyst III / hydrocracking catalyst IV. The four hydrocracking catalysts are all supported by amorphous silica-alumina and modified Y molecular sieve. The volume ratio of hydrocracking catalyst I / hydrocracking catalyst II / hydrocracking catalyst III / hydrocracking catalyst IV in Examples 1-3 is 1:1:1:1.
[0032] At the total reaction pressure of 15.0MPa, the volume ratio of hydrogen to oil in the refining section and the cracking section is 900:1 and 1100:1 respectively, and the volume space velocity of the fresh material in the refining section and the cracking section is 1.1h -1 and 1.2h -1 , control the nitrogen content of refined oil to 5-8 ug.g -1 , a process test with a conversion rate of about 60wt% to 80wt% at >320°C was carried out, and the product quality of each fraction w...
Embodiment 4
[0036] Using Iranian VGO as raw material oil, the catalyst system of FF-46 hydrocracking pretreatment catalyst combined with hydrocracking catalyst I / hydrocracking catalyst II was selected. Both hydrocracking catalysts use amorphous silica-alumina and modified Y molecular sieve as carriers. The volume ratio of hydrocracking catalyst I / hydrocracking catalyst II in Example 4 is 1:1.
[0037] At the total reaction pressure of 15.0MPa, the volume ratio of hydrogen to oil in the refining section and the cracking section is 900:1 and 1100:1 respectively, and the volume space velocity of the fresh material in the refining section and the cracking section is 1.1h -1 and 1.2h -1 , control the nitrogen content of refined oil to 5-8 ug.g -1 , a process test with a conversion rate of about 70wt% at >320°C was carried out, and the product quality of each fraction was investigated.
[0038] See Table 1 for the specific properties of the feedstock oil, Table 2 for the basic properties of ...
Embodiment 5
[0041] Using Iranian VGO as raw material oil, FF-46 hydrocracking pretreatment catalyst is selected to match the catalyst system of hydrocracking catalyst I / hydrocracking catalyst II / hydrocracking catalyst III. The three hydrocracking catalysts are supported by amorphous silica-alumina and modified Y molecular sieve. In Example 5, the volume ratio of hydrocracking catalyst I / hydrocracking catalyst II / hydrocracking catalyst III is 1:1:1.
[0042] At the total reaction pressure of 15.0MPa, the volume ratio of hydrogen to oil in the refining section and the cracking section is 900:1 and 1100:1 respectively, and the volume space velocity of the fresh material in the refining section and the cracking section is 1.1h -1 and 1.2h -1 , control the nitrogen content of refined oil to 5-8 ug.g -1 , a process test with a conversion rate of about 70wt% at >320°C was carried out, and the product quality of each fraction was investigated.
[0043] See Table 1 for the specific properties o...
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