Distillation process for producing a low TPP phenate
AssigneeChevron Oronite Company LLC
InventorEugene Edward Spala
Life of this patent
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Abstract
Disclosed herein is a process for preparing a sulfurized non-overbased calcium phenate detergent having a reduced content of un-sulfurized alkyl-substituted phenol and its salt. The process steps involve adding an organic solvent to the detergent, wherein the organic solvent has a boiling point of equal or above the boiling point of the un-sulfurized alkyl-substituted phenol. Distilling the organic solvent from the detergent to reduce the content of the un-sulfurized alkyl-substituted phenol.
Claims23
A process for preparing a sulfurized non-overbased calcium phenate detergent having a reduced content of un-sulfurized alkyl-substituted phenol and the salt thereof, the process comprising the steps of:
- (a) adding an organic solvent to the detergent, wherein the organic solvent has a boiling point of equal or above the boiling point of the un-sulfurized alkyl-substituted phenol;
- and
- (b) distilling the organic solvent from the detergent thereby reducing the content of the un-sulfurized alkyl-substituted phenol.
A concentrate composition obtained from distillation of sulfurized alkyl-substituted phenols, the concentrate composition comprising:
- a sulfurized non-overbased calcium phenate that includes an alkyl-substituted group, wherein the alkyl-substituted group is derived from propylene oligomer, wherein the sulfurized non-overbased calcium phenate is substantially free of un-sulfurized phenol or un-sulfurized phenate, wherein the un-sulfurized phenol or a calcium salt thereof is present in less than 0.3 wt % of the concentrate composition at 4.25 wt % or greater of calcium.
A lubricating oil composition comprising:
- a base oil;
- and
- a calcium salt of a sulfurized alkyl-substituted compound containing reduced amount of combined mass of an un-sulfurized alkyl-substituted compound and its un-sulfurized calcium salt, the calcium salt of a sulfurized alkyl-substituted compound being produced by the process comprising:
- (a) sulfurizing and neutralizing an alkyl-substituted phenol compound derived from alkylation of a phenol-based compound with one or more olefins comprising a propylene oligomers to provide a calcium salt of the sulfurized alkyl-substituted phenol;
- (b) adding an organic solvent to the calcium salt of the sulfurized alkyl-substituted phenol from (a), wherein the organic solvent has a boiling point of equal or above the boiling point of the un-sulfurized alkyl-substituted phenol;
- and
- (c) distilling the organic solvent away to provide a sulfurized alkyl-substituted phenol compound that is substantially free of the un-sulfurized alkyl-substituted phenol compound, wherein the calcium salt of the sulfurized alkyl-substituted phenol compound contains less than about 0.3% by combined mass of the un-sulfurized alkyl-substituted phenol compound and its un-sulfurized metal salt at 4.25 wt % or greater of calcium.
A calcium salt of a sulfurized alkyl-substituted compound containing reduced amount of combined mass of an un-sulfurized alkyl-substituted compound and its un-sulfurized metal salt, the salt of a sulfurized alkyl-substituted compound being produced by the process comprising:
- (a) sulfurizing and neutralizing an alkyl-substituted phenol compound derived from alkylation of a phenol-based compound with one or more olefins derived from a propylene oligomers to provide a calcium salt of the sulfurized alkyl-substituted phenol;
- (b) adding an organic solvent to the calcium salt of the sulfurized alkyl-substituted phenol from (a), wherein the organic solvent has a boiling point of equal or above the boiling point of the un-sulfurized alkyl-substituted phenol;
- and
- (c) distilling the organic solvent away to provide a sulfurized alkyl-substituted phenol compound that is substantially free of the un-sulfurized alkyl-substituted phenol compound, wherein the calcium salt of the sulfurized alkyl-substituted phenol compound contains less than about 0.3% by combined mass of the un-sulfurized alkyl-substituted phenol compound and its un-sulfurized metal salt at 4.25 wt % or greater of calcium.
Dependencies are inferred from the claim text.