Abstract:
The tendency of an oil to foam is inhibited by adding to the oil a homopolymer derived from a silane monomer of formula wherein R is a C1-C18 monovalent hydrocarbon group comprising an alkyl, cycloalkyl, aryl, aralkyl or alkaryl group, R1 is a C1-C18 alkyl or alkyloxyalkyl group, R11 is a vinyl, allyl or cyclohexenyl group, x is 0, 1 or 2, y is 1, 2 or 3 and the sum of x and y is 3. Polymerization takes place through the R11 groups to produce a carbon-to-carbon chain, so that the polymers are not polysiloxanes. The oil may be a mineral or synthetic lubricating oil or a ligher petroleum fraction such as gasoline or kerosene. Synthetic lubricating oils mentioned are polymerized unsaturated hydrocarbons (e.g. polybutenes, polypropenes and mixtures of these), polyalkylene glycols and esters thereof, and the aliphatic diesters of dicarboxylic acids (e.g. butyl, hexyl, 2-ethylhexyl, decyl and lauryl esters of sebacic, adipic or azelaic acid). The homopolymers may be derived from vinylalkoxy-, allylalkoxy- or cyclohexenylalkoxy-silanes or mixtures of these. In particular, homopolymers derived from vinyltriethoxy-, vinyltributoxy-, vinylbutyldiethoxy-, vinyldibutylethoxy-, vinylhexyldibutoxy-, vinyldiphenylethoxy-, vinylphenyldiethoxy-silane may be employed. The homopolymers may be employed in lubricating oils in conjunction with other additives, such as extreme pressure agents, viscosity index improvers, oiliness agents and detergents. Specified detergents are phosphosulphurized hydrocarbons (e.g. phosphosulphurized polybutylene) neutralized with sodium or potassium hydroxide, alkaline earth petroleum sulphonates, alkaline earth phenyl stearates and alkaline earth alkyl phenol sulphides. In the examples, toluene or kerosene solutions of polyvinyltriethoxysilanes are added to a lubricating composition consisting of mineral oil and lecithin. For comparison purposes, the effect of adding toluene or kerosene solutions of dimethylsilicones to the same lubricating composition is described.ALSO:Homopolymers derived from a silane monomer of formula wherein R is a C1-C18 monovalent hydrocarbon group comprising an alkyl, cycloalkyl, aryl, aralkyl or alkaryl group, R1 is a C1-C18 alkyl or alkoxyalkyl group, R11 is a vinyl, allyl or cyclohexenyl group, x is 0, 1 or 2, y is 1, 2 or 3 and the sum of x and y is 3, are employed in oils as anti-foam agents (see Group III). Polymerization takes place through the R11 groups to produce a carbon-to-carbon chain, so that the polymers are not polysiloxanes. The monomers may be polymerized at elevated temperature and in the presence of di-t-butyl peroxide as catalyst, employing an inert, substantially anhydrous atmosphere, for example of nitrogen, argon or carbon dioxide. In examples, vinyltriethoxysilane, vinylethyldiethoxysilane, vinylphenyldiethoxysilane or vinyldiphenylethoxysilane are polymerized.
Abstract:
A diesel fuel composition comprising a first additive (i) comprising a quaternary ammonium salt and a second additive (ii) comprising a Mannich reaction product; wherein the quaternary ammonium salt additive (i) is formed by the reaction a quaternising agent which is not an ester and a compound formed by the reaction of a hydrocarbyl-substituted acylating agent and an amine of formula (B1) or (B2): wherein R2 and R3 are the same or different alkyl, alkenyl or aryl groups having from 1 to 22 carbon atoms; X is a bond or alkylene group having from 1 to 20 carbon atoms; n is from 0 to 20; m is from 1 to 5; and R4 is hydrogen or a C1 to C22 alkyl group; and wherein the Mannich reaction product additive (ii) is the product of a Mannich reaction between: (d) an aldehyde; (e) an amine; and (f) a substituted phenol; wherein the phenol is substituted with at least one branched hydrocarbyl group having a molecular weight of between 200 and 3000.
Abstract:
Use of a hydrocarbyl-substituted dicarboxylic acid for improving or boosting the separation of water from fuel oils and gasoline fuels which comprise additives with detergent action. A Fuel additive concentrate comprising the said hydrocarbyl-substituted dicarboxylic acid, certain additives with detergent action and optionally other customary additives and solvents or diluents.
Abstract:
A diesel fuel composition comprising a quaternary ammonium salt additive which additive is formed by the reaction of (1) a quaternising agent and (2) a compound formed by the reaction of a hydrocarbyl-substituted acylating agent and at least 1.4 molar equivalents of an amine of formula (B1) or (B2), wherein R2 and R3 are the same or different alkyl, alkenyl or aryl groups having from 1 to 22 carbon atoms; X is a bond or alkylene group having from 1 to 20 carbon atoms; n is from 0 to 20; m is from 1 to 5; and R4 is hydrogen or a C1 to C22 alkyl group.
Abstract:
The present invention relates to the use of compositions comprising the following components: A, a polymer obtainable through hydrosilylation of a siloxane having SiH functions and having vinyl functions with another unsaturated compound, and D, platinum-group-metal atoms or platinum-group-metal ions, as antifoam for hydrocarbons, and also for suppressing or reducing the formation of foam or for the destabilization of foam.
Abstract:
A process for removal of sulfur dioxide from a flue gas. An alkaline admixture is coated with a coating agent that improves dispersability and delays calcination of the alkaline admixture within a combustion zone and results in a coated alkaline admixture. The coated alkaline admixture is introduced to the boiler to create a reaction that reduces the amount of sulfur dioxide from the flue gas.
Abstract:
A process for removal of sulfur dioxide from a flue gas. An alkaline admixture is coated with a coating agent that improves dispersability and delays calcination of the alkaline admixture within a combustion zone and results in a coated alkaline admixture. The coated alkaline admixture is introduced to the boiler to create a reaction that reduces the amount of sulfur dioxide from the flue gas.
Abstract:
Polyether- or polyester-modified polydimethylsiloxane is mixed with a lubricant, such as motor oil. Preferably, the polydialkylsiloxane can form at least about 0.5 percent by volume of the mixture. And the mixture can be used in a fluid-conduit system (e.g., a lubrication system) of a motor or a vehicle (e.g., an automobile), wherein the mixture offers excellent filming properties on, e.g., engine parts and helps to improve engine efficiency, to lengthen the service life of the lubricant, and to reduce harmful emissions from the vehicle.