Additives with high sulfurization for lubricating oil compositions
AssigneeAfton Chemical Corporation
InventorsMitchell Latimer, Jason Bell
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Abstract
The present disclosure provides a method for preparing a sulfurized alkyl phenate product to achieve a high sulfurization ratio of sulfurized alkyl phenate to unsulfurized alkyl phenate/phenol in the context of a neutralized and optionally overbased additive. The sulfurized alkyl phenate product is obtained by sulfurizing an alkyl phenol with a sulfur chloride blend that includes about 40 to about 75 weight percent of sulfur dichloride.
Claims34
A process for preparing a sulfurized compound for lubricating compositions to achieve a high sulfurization ratio of the sulfurized compound to residual unsulfurized compounds, the process comprising:
- sulfurizing an alkyl phenol with a sulfur chloride blend to provide a sulfurized alkyl phenol, wherein a mol ratio of the sulfur chloride blend to the alkyl phenol is about 0.6:1 to about 0.75:1;
- and
- wherein the sulfur chloride blend includes sulfur monochloride and sulfur dichloride and wherein the sulfur chloride blend is about 40 to about 75 weight percent of sulfur dichloride.
A sulfurized alkyl phenate composition prepared by the process comprising:
- sulfurizing an alkyl phenol with a sulfur chloride blend to provide a sulfurized alkyl phenol, wherein a mol ratio of the sulfur chloride to the alkyl phenol is about 0.6:1 to about 0.75:1;
- wherein the sulfur chloride blend includes sulfur monochloride and sulfur dichloride and wherein the sulfur chloride blend is about 40 to about 75 weight percent of sulfur dichloride;
- and
- neutralizing and optionally overbasing the sulfurized alkyl phenol in the presence of a solvent to provide the sulfurized alkyl phenate composition.
A detergent including a hydroxyaromatic compound or salt thereof having a high sulfurization ratio of sulfurized to unsulfurized compounds, the detergent comprising
- an alkyl substituted, sulfur-bridged hydroxyaromatic compound or salt thereof, wherein the sulfur bridge is derived from a sulfur chloride blend including sulfur dichloride and sulfur monochloride and wherein the blend includes about 40 to about 75 weight percent of sulfur dichloride;
- and
- a sulfurization ratio of 500:1 to 5500:1 with no more than about 900 ppm of unsulfurized hydroxyaromatic compounds or salts thereof.
Dependencies are inferred from the claim text.