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Overbased sulfonates

The main advantages of these thickeners are their ease of incorporation, temperature stability, effectiveness, good sag resistance and very little effect on gloss. On the other hand, due to their high alkalinity, they cannot be used in acid catalyzed systems. They make the product more water sensitive. [Pg.245]

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]

Magnesium overbase sulfonates are used primarily as a motor oil additive where they act to neutralize acidic by-products formed during the combustion process. This helps to reduce corrosion of the internal surfaces of engine components and also reduce the formation of sludge, which are also highly acidic (Spearot, 1974). [Pg.218]

Some metallic detergents, such as sulfonates, in particular the overbased sulfonates, function as a rust inhibitor by forming a film through adsorption of surfactant molecules or neutralizing the acidic materials, preventing them from attacking the metal surfaces. Acidic materials are commonly produced by incomplete combustion of fuels or oil oxidation. [Pg.335]

Detergent and dispersant additives sulfonates, thiophosphonates, phenates, salicylates more or less overbased, succinimides. [Pg.279]

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]

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]

Overbase magnesium sulfonates are a transparent colloidal dispersion (0.1 xm or smaller) of magnesium carbonate in oil containing protective colloids, which are usually magnesium derivatives of petroleum sulfonic acids or alkyl benzene sulfonic acids. [Pg.219]

BNECS 263-140-3 Sutfonic acids, petroleum, barium salts Sulfonic acids, petroleum, barium salts, overbased. [Pg.594]

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]

Overbased Mo-alkylene earth metal sulfonates 2,6-Di-ferf-butyl-4-methyl phenyl-borate Borated polyhydroxy-alkyl sulfides Borated N-hydrocarbyl alkylene triamines Product of boric acid and cocosyl sarcosene Product of 1,2-hexadecanediol, C15-C19 alcohols and boric acid Zinc salts of partially borated and partially phosphosulfurized penta or dipentaerythritol N-Oleylglycolamide N-Alkoxylakylene diamine diamide N-Cocoformamide... [Pg.174]

In the formulae, Me represents the metal atom. The organic acids RCOOH, where R is a hydrocarbon chain, can be replaced by alkyl sulfuric acids ROSO3H), alkyl aryl sulfonic acids (RSO3H), and alkyl phenols (ROH) (see Figure 4.6). In the case of divalent ions, nonsto-chiometric additives, also called overbased salts, can be obtained by the following reaction... [Pg.155]

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...
Sr octanoate in dodecane 1 % overbased Ca octanoate in dodecane 1 % oveibased Ca alkyl aryl sulfonate in dodecane Pure dodecane... [Pg.164]

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

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]

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. Overbased magnesium sulfonate Chem. Analysis Magnesium 9.3% magnesium sulfonate 28%... [Pg.550]

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

See other pages where Overbased sulfonates is mentioned: [Pg.218]    [Pg.313]    [Pg.244]    [Pg.218]    [Pg.313]    [Pg.244]    [Pg.359]    [Pg.359]    [Pg.901]    [Pg.13]    [Pg.219]    [Pg.336]    [Pg.337]    [Pg.152]    [Pg.152]    [Pg.132]    [Pg.137]    [Pg.620]    [Pg.244]    [Pg.156]    [Pg.375]    [Pg.550]   


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