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In the catalytic processing of aromatic hydrocarbon compounds, a hydrocarbon oil is successively contacted at aromatic saturation conditions with a catalyst in a first reaction zone and contacted at a lower temperature with a second portion of the catalyst in the same reactor or in multiple reactors

In the catalytic processing of aromatic hydrocarbon compounds, a hydrocarbon oil is successively contacted at aromatic saturation conditions with a catalyst in a first reaction zone and contacted at a lower temperature with a second portion of the catalyst in the same reactor or in multiple reactors.

대표청구항 ▼

A catalytic process for promoting an equilibrium-limited aromatic saturation reaction in a hydrocarbon oil containing aromatic hydrocarbons, said catalytic process comprising the following steps: (1) contacting an upstream portion of a catalyst bed containing a particulate catalyst in an upstream re

A catalytic process for promoting an equilibrium-limited aromatic saturation reaction in a hydrocarbon oil containing aromatic hydrocarbons, said catalytic process comprising the following steps: (1) contacting an upstream portion of a catalyst bed containing a particulate catalyst in an upstream reaction zone under aromatic saturations conditions including a liquid hourly space velocity from about 0.01 to about 20 with said hydrocarbon oil to produce a product hydrocarbon oil containing less aromatic hydrocarbons than said hydrocarbon oil, and (2) contacting a downstream portion of said catalyst bed in a downstream reaction zone under aromatic saturation conditions, including a lower temperature than the temperature in step (1) and a liquid hourly space velocity from about 0.01 to about 20, with the product hydrocarbon obtained in step (1) to produce a second product hydrocarbon containing a lesser proportion of aromatic hydrocarbon than in said product hydrocarbon obtained in step (1), said temperature in step (2) being sufficient to saturate a selected amount of aromatic hydrocarbons from said product hydrocarbon obtained in step (1) to produce said second product hydrocarbon containing at least 25 percent less of said aromatic hydrocarbons than contained in said hydrocarbon oil contacting said catalyst in step (1), and said temperature in step (2) provides a relative reaction rate constant for said aromatic saturation reaction that is initially higher than the relative reaction rate constant for said aromatic saturation reaction provided by the temperature in step (1), and wherein the inlet temperature of said downstream reaction zone is lower than the inlet temperature of said upstream reaction zone.