Recovery of overbased alkaline earth metal additives from centri

Details Recovery of overbased alkaline earth metal additives from centri Recovery of overbased alkaline earth metal additives from centri

1984-12-17

1990-03-20

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

562475, 562511, 568756, C07C14324, C07C 6504, C07C 6100

Patent

active

049103342

ABSTRACT:
Centrifugates obtained by centrifuging the reaction product of a process in which organic acids selected from the group consisting of higher alkyl benzene sulfonic acids, higher alkyl naphthenic acids, higher alkyl salicylic acids and higher alkyl phenols or alkali metal salts of the acids are contacted with a base acting alkaline earth metal compound to produce an alkaline earth metal salt of the selected acid are mixed with a quantity of an aqueous solution of an acid having an ionization constant greater than 1.times.10.sup.-5 sufficient to bring the pH of the centrifugate-acid mixture to a level in the range about 2 to 10 and settling the mixture to separate a lower aqueous phase and an upper liquid product phase and recovering the upper phase.

REFERENCES:
patent: 2884445 (1959-04-01), Axe et al.
patent: 3725467 (1973-04-01), Chorney
patent: 4129589 (1978-12-01), Eliades et al.
patent: 4614597 (1986-09-01), Stuart et al.

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