Additives with high sulfurization for lubricating oil compositions
AssigneeAfton Chemical Corporation
InventorsMitchell Latimer, Piotr Grzyska, Jason Bell
Life of this patent
Estimating the term…
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.
Claims20
A process for preparing a sulfurized alkyl phenate product to achieve a high sulfurization ratio of sulfurized alkyl phenate to unsulfurized alkyl phenate, the process comprising:
- sulfurizing an alkyl phenol with a source of sulfur to provide a sulfurized alkyl phenol, wherein the alkyl phenol is derived from an alkylation of a phenol and wherein a mol ratio of the sulfur source to the alkyl phenol is about 0.66 to about 3.5;
- neutralizing and optionally overbasing the sulfurized alkyl phenol in the presence of a solvent to provide a sulfurized alkyl phenate composition, wherein the neutralizing and the optional overbasing is at a temperature not exceeding about 140° C. to achieve a sulfurization ratio of about 500:1 or greater;
- and
- post processing the sulfurized alkyl phenate composition to obtain the sulfurized alkyl phenate product, wherein the post processing is at temperatures not to exceed about 140° C. to maintain the sulfurization ratio of about 500:1 or greater.
A metal phenate detergent having a high sulfurization ratio of sulfurized alkyl phenate to unsulfurized alkyl phenate or unsulfurized alkyl phenol, the metal phenate detergent comprising:
- a sulfurized alkyl phenate obtained from a source of sulfur and an alkyl phenol and having a total base number of about 50 to about 400 mg KOH/g as measured by the method of ASTM D-2896, wherein a mol ratio of a sulfur source to the alkyl phenol is about 0.66 to about 3.5;
- up to about 100,000 ppm of alkali or alkaline metal and up to about 65,000 ppm of sulfur;
- and
- a sulfurization ratio of about 500:1 to about 5500:1 with no more than about 900 ppm of unsulfurized alkyl phenate and/or unsulfurized alkyl phenol.
Dependencies are inferred from the claim text.