Synthesis and effectiveness of overbased magnesium and calcium petroleum sulfonates

Journal Article · · Chem. Technol. Fuels Oils (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF00724162· OSTI ID:5374121

Fialkovskii, R V; Romanyutina, L V; Korbut, L F; Mishunina, I I; Konovich, L G

Overbased sulfonate additives are widely used to improve the service properties of motor oils. This paper describes the preparation of an overbased magnesium sulfonate additive from MSG-8 oil and an investigation of its functional properties. In experiments, the solution of ammonium sulfate, fat diluted with I-20A oil to a 38% concentration, was heated and stirred continuously in the presence of water and excess magnesium oxide for a period of 4 h at 80-120/degree/C while stripping out the liberated ammonia with nitrogen. The resulting oil solution of magnesium sulfonate was dissolved in toluene. The toluene solution after cleanup was held under vacuum to remove the solvent; the residue was an oil solution of overbased magnesium sulfonate. Their properties are tabulated. Comparative data are shown in Table 1 for a calcium sulfonate additive synthesized from the same intermediate (ammonium sulfate), using calcium hydroxide as the base. Test results on M-11 oil containing 5% of the magnesium or calcium additive are listed. It is shown that the magnesium additive gave better results from the calcium additive at the same concentration in terms of oxidation stability, corrosion properties, detergency, and dispersancy. 9 refs.

• OSTI ID: 5374121
• Journal Information: Chem. Technol. Fuels Oils (Engl. Transl.); (United States), Journal Name: Chem. Technol. Fuels Oils (Engl. Transl.); (United States) Vol. 17:3-4; ISSN CTFOA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
023000 -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADDITIVES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
COMPARATIVE EVALUATIONS
ESTERS
LUBRICANTS
LUBRICATING OILS
MAGNESIUM COMPOUNDS
OILS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PETROLEUM SULFONATES
PHYSICAL PROPERTIES
SULFONATES
SULFONIC ACID ESTERS
SYNTHESIS