Precarbonation in overbasing calcium petroleum sulfonates
AssigneePhillips Petroleum Company
InventorsJ. Ronald Spence, Douglas S. Jack
Life of this patent
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Abstract
Method and apparatus are provided for overbasing a petroleum sulfonate in a multi-vessel reaction system in which the first reactor is a plug flow reactor in which a feedstock of lime, lube oil, petroleum sulfonate, naphtha, and methanol is fed into the top of a vertical reactor with carbon dioxide in an amount of about 5 to about 10 percent by volume of the total CO.sub.2 used in the process is fed near the bottom of the reactor above the reaction product outlet which is then passed to at least one continuous stirred tank reactor for additional reaction with carbon dioxide in an amount in a range of about 95 to about 90 percent by volume of the total CO.sub.2 used in the process.
Claims12
A method for overbasing a petroleum sulfonate in a multi-reaction system comprising:
- (1) contacting a feedstream comprising Ca(OH).sub.2, neutral petroleum sulfonate, lubricating oil, methanol, and naphtha under reaction conditions of carbonation reaction temperature in a range of about 25.degree. C. to about 80.degree. C., and a carbonation reaction pressure in a range of about 1 psia to about 30 psia, in a plug flow reactor with carbon dioxide, said carbon dioxide present in an amount of a range of about 5 to about 10 percent by volume of the total CO.sub.2 used in the process thereby producing a first treated product,
- (2) contacting said first treated product in at least one continuous stirred tank reactor with additional carbon dioxide under reaction conditions of carbonation reaction temperature in a range of about 25.degree. C. to about 80.degree. C., and a carbonation reaction pressure in a range of about 1 psia to about 30 psia, in an amount in a range of about 95 to about 90 percent by volume of the total CO.sub.2 used in the process with the total reaction time for steps (1) and (2) in a range of about 20 minutes to about 120 minutes.
Dependencies are inferred from the claim text.