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Overbased calcium sulfonate

Calcium Overbased calcium sulfonate and calcium phenate-detergent/acid neutralizing additive... [Pg.109]

Engine lubricant formulators are aware of the problems associated with fuel sulfur and develop products to help combat its corrosive effect. Lubricants containing overbased calcium sulfonates and phenates are utilized to chemically neutralize the acids which form as a result of burning fuel sulfur. These oils can be effective at preventing the corrosive effects of fuel sulfur. However, the oils must be frequently changed to ensure that the acid-neutralizing effect is maintained. [Pg.116]

Najman, M., Kasrai, M., Bancroft, G.M., Davidson, R. Combination of adless antiwear additives with metallic detergents interactions with neutral and overbased calcium sulfonates. Tribol. Int. 39, 342-355 (2006). doi 10.1016/j.triboint.2005.02.014... [Pg.393]

Wittle, J.R., Method of preparing overbased calcium sulfonates, US Patent 4,427,559, 1984. [Pg.172]

Cisaire, L., Martin, J.M., Lemogne T. and Gresser, E. Chemical analysis of overbased calcium sulfonate detergents by coupling XPS, Tof-SIMS, XANES and EFTEM, Colloids and Surface. A Physicochem. Eng ineening. Aspects, 238, 2004, 151-158. [Pg.174]

Giasson, S., Palermoa, T., Buffeteau, T., Desbat B. and Turlet, J. M., Study of boundary film formation with overbased calcium sulfonate by PM-IRRAS spectroscopy. Thin Solid Films, 252, 1994, 111-119. [Pg.174]

Chem. Descrip. Overbased calcium sulfonate Chem. Anaiysis Calcium 15.2% calcium sulfonate 19%... [Pg.550]

Chem. Descrip. Modified overbased calcium sulfonates ionic Nature Anionic... [Pg.1356]

These sodium sulfonates or so-called natural sulfonates are transformed into simple or overbase calcium or magnesium sulfonates (Satriana, 1982). [Pg.360]

Detergents are metal salts of organic acids used primarily in crankcase lubricants. Alkylbenzenesulfonic acids, alkylphenols, sulfur- and methjiene-coupled alkyl phenols, carboxyUc acids, and alkylphosphonic acids are commonly used as their calcium, sodium, and magnesium salts. Calcium sulfonates, overbased with excess calcium hydroxide or calcium carbonate to neutralize acidic combustion and oxidation products, constitute 65% of the total detergent market. These are followed by calcium phenates at 31% (22). [Pg.242]

The TEM micrographs presented in Figure 4.9 show typical results obtained by means of the freeze fracturing technique applied to overbased calcium alkyl benzene sulfonate (OCABS) dispersion in dodecane. The OCABS aggregates, clearly identified by X-ray analysis on the extractive replica, appear as approximately spherical particles dispersed in the apolar medium [4, 35]. [Pg.156]

Figure 4.9 TEM micrographs recorded on a platinum shadowed replica prepared by FFET. (a) Sample prepared on 5 % dispersion of overbased calcium didodecylbenzene sulfonate in dodecane. Spherical nanoparticles of 10 nm diameter are easily visible, (b) Extractive replica prepared on the same dispersion. (c) X-ray analysis of the selected area (black circle) reveals the composition of the particles (Ca, S, O) corresponding to the sulfonate. The presence of Pt is due to the shadowing layer and copper to the copper support grid, (d) Radial distribution functions (from EXAFS studies) uncorrected from phase shifts obtained on caldte, and two OCABS dispersions in oil. The presence of a single peak corresponding to the first Ca-0 distance points out the amorphous structure of the mineral part of the OCABS particles... Figure 4.9 TEM micrographs recorded on a platinum shadowed replica prepared by FFET. (a) Sample prepared on 5 % dispersion of overbased calcium didodecylbenzene sulfonate in dodecane. Spherical nanoparticles of 10 nm diameter are easily visible, (b) Extractive replica prepared on the same dispersion. (c) X-ray analysis of the selected area (black circle) reveals the composition of the particles (Ca, S, O) corresponding to the sulfonate. The presence of Pt is due to the shadowing layer and copper to the copper support grid, (d) Radial distribution functions (from EXAFS studies) uncorrected from phase shifts obtained on caldte, and two OCABS dispersions in oil. The presence of a single peak corresponding to the first Ca-0 distance points out the amorphous structure of the mineral part of the OCABS particles...
Martin, J.M., Mansot, J.L., and Hallouis, M. Energy filtered electron microscopy (EFEM) of overbased calcium alkylaryl sulfonate micelles, Ultramicroscopy, 30, 1990, 321-328,... [Pg.174]

Mansot, J.L., Hallouis, M. and Martin, J.M., Colloidal antiwear additives. Part One stmctural study of overbased calcium alkylbenzene sulfonate micelles. Colloids and Surfaces A, 71,1993,123-134. [Pg.174]

Benzene is alkylated with C g and C20+ olefins and subsequently sulfonated and neutralized with a dibasic salt such as calcium, magnesium, or barium. These so-called overbased sulfonates are used ia crankcase additive packages. [Pg.442]

Based on che above reaction, the calcium overbased sulfonate detergent reacts with DAP to form a metallic hydroxyl apatite (Ca5(P04>30H), which is insoluble in aqueous and oil phase. This reaction mechanism is general for Ca, Ba, Mg, and Zn additives. Lead is present in a physically different form chan additive compounds in the used oil. The lead particles present in used oil are too large in size to react with DAP, except for surface reactions. [Pg.321]

Petroleum sulfonates are oil-soluble compounds that find use as emulsifiers in lubricating oil and other functional fluids and in secondary oil recovery. They are usually supplied as sodium salts in mixtures with oil. They may contain unsulfonated oil or be diluted in a light petroleum distillate. Overbased products contain high alkalinity additives, such as colloidal calcium carbonate. [Pg.6]

See other pages where Overbased calcium sulfonate is mentioned: [Pg.152]    [Pg.244]    [Pg.375]    [Pg.550]    [Pg.152]    [Pg.244]    [Pg.375]    [Pg.550]    [Pg.620]    [Pg.13]    [Pg.152]    [Pg.156]    [Pg.453]   
See also in sourсe #XX -- [ Pg.244 ]



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