Continuous process for highly overbased petroleum sulfonates using a series of stirred tank reactors
AssigneePhillips Petroleum Company
InventorDouglas S. Jack
Life of this patent
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Abstract
A method and apparatus for the continuous overbasing of petroleum sulfonate in which there is a seriatim contacting at reaction conditions in a series of at least four stirred reaction zones of CO.sub.2 with a feedstock mixture in the first reaction zone containing (1) petroleum sulfonate, (2) 100 neutral lube oil, (3) Ca(OH).sub.2, (4) methanol, and (5) naphtha and a feedstock mixture in each successive reaction zone that is the effluent from the last previous reaction zone. Method and apparatus for the recovery of a dispersion of CaCO.sub.3 in a mixture of calcium petroleum sulfonate and 100 neutral lube oil stock as product from the last reaction zone effluent.
Claims16
A continuous process for preparing highly overbased petroleum sulfonate comprising seriatim contacting CO.sub.2 at reaction conditions of temperature of carbonation in a range from about 25.degree. C. to about 80.degree. C., pressure of carbonation reaction from about 1 psia to about 30 psia, and in a reaction time that can vary from about 20 minutes to about 120 minutes overall with a feedstock mixture in each of a series of at least four stirred reaction zones, said feedstock mixture in the first reaction zone comprising (1) petroleum sulfonate, (2) solvent refined 100 neutral lube oil stock, (3) CA(OH).sub.2, (4) methanol, and (5) naphtha and said feedstock mixture in each subsequent stirred reaction zone comprising effluent from the previous zone.
Dependencies are inferred from the claim text.