Abstract: New methods of producing phenylalkylsilanes having a desired ration of phenyldialkylsilanes to phenyltrialkylsilanes using effective control of temperature in the reaction of sodium trialkylaluminum and phenyltrihalosilanes are disclosed.

Abstract: This invention relates to a white or at least near white flame retardant product which is predominant in decarbromodiphenylalkane, and which product contains a minor amount of impurities; to a process for preparation of the flame retardant product; to a process for the removal of excess bromine from the product by use of a treatment solution and elevated temperature; and to macromolecular materials utilizing the product as a flame retardant.

Abstract: Succinimides useful as detergents in fuels are prepared by reacting (a) at least one substituted succinic acid or acid derivative thereof containing an average of from 16 to about 50 carbon atoms in the molecule and having an acyclic aliphatic substituent group containing an average of at least 12 but less than 30 carbon atoms, with (b) at least one alkanol polyamine containing an average of at least 4 carbon atoms and containing at least one primary amino group.

Abstract: Improved silahydrocarbon mixtures comprising phenyltrialkylsilanes wherein the alkyl groups independently are hydrocarbon chains having from about 4 to about 20 carbon atoms, preferably each independent alkyl group differing from the other by no more than about 2 carbon atoms, are produced having unexpectedly good resistance to oxidation and having use in lubrication compositions.

Abstract: A novel flame retardant formulation comprising a flammable macromolecular material and a metal salt of a polybrominated sulfonic acid and having improved flame retardancy and enhanced U.V. stability.

Abstract: A flame retardant polypropylene based formulation which contains polypropylene and a flame retardant amount of decabromodiphenyl oxide and a polybrominated cycloalkane having an 8 to 12 carbon atom ring and at least 4 ring-attached bromine atoms.

Abstract: NO.sub.x emissions are reduced in two stages during operation of an engine equipped with an exhaust gas catalyst system. In the first stage, a reduction in NO.sub.x emissions is effected in the exhaust leaving the combustion chamber. In the second stage a further reduction in NO.sub.x emissions is effected in the exhaust passing through the exhaust catalyst system. Both of the two-stage reductions are brought about in the same way, namely (a) by use of a fuel composition containing at least one fuel-soluble cyclopentadienyl manganese tricarbonyl compound in an amount equivalent to up to 1/32 gram of manganese per gallon of fuel; and (b) by enhancing the NO.sub.x control activity of at least the catalyst by prior operation of the engine on such fuel composition, either intermittently or continuously. Such prior operation constitutes a run-in or conditioning stage of sufficient total duration (continuous or interrupted) so that substantial reductions in NO.sub.

Abstract: When a phenol having substituents in at least the 2- and 4-positions but having a hydrogen atom in the 6-position, or a phenol having substituents in at least the 2- and 6-positions but having a hydrogen atom in the 4-position is reacted with formaldehyde and 1,3-propanediamine, a unique insertion-condensation reaction occurs whereby the product is a hexahydropyrimidine derivative which may be represented by the general formula ##STR1## wherein R.sub.1 is (i) a 2-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions or (ii) a 4-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions; and R.sub.

Abstract: The quality of a product predominant in tetrabromobisphenol-A is enhanced by heat treating the product for a period of time and at a temperature which are sufficient to obtain a TBBPA predominant product having less than about 50 ppm of hydrohalide impurities.

Abstract: A process for obtaining a substantially dry alcohol from a mixture comprising alcohol and water in a non-azeotropic amount by utilizing at least a portion of the alcohol in the mixture as the stripping medium.

Abstract: Composition of heterohalogenated cyclododecatriene (e.g. C.sub.12 H.sub.18 Br.sub.x Cl.sub.y) are disclosed and methods for preparation thereof.

Abstract: A flame retardant product predominant in hexabromocyclododecane is prepared and dried by a process wherein gaseous ammonia is injected into the dryer system to prevent the formation of color bodies which contaminant the product.

Abstract: Polybutenyl substituted succinic acylating agents are formed by reacting (a) an acidic reactant represented by the general formulaR--CO--CH.dbd.CH--CO--R'wherein R and R' are independently --OH, --O-lower alkyl, a halogen atom, or taken together are a single oxygen atom, with (b) a polymer composed mainly or entirely of polyisobutene, at least 50% of the polyisobutene content of the polymer having an end group represented by the formula ##STR1## The mole ratio of acidic reactant:polymer is at least 1:1; and the reaction mixture is maintained under superatmospheric pressure during at least a substantial portion of the reaction period. The reaction rate is high, the yields of desired product are high, and despite the fact that superatmospheric pressures and elevated temperatures are used, the process forms only small amounts of tars or resinous co-products, even when employing as much as a 20% or more molar excess of maleic anhydride.

Abstract: Tetrabromobisphenol-A is made in high purity by adding a methanol-bromine solution to a methanol-bisphenol-A solution with vigorous agitation. Use of the bromine-methanol solution reduces the amount of by-products compared to the use of liquid bromine feed to a methanol-bisphenol-A solution. The process is readily adapted to large scale equipment by circulating the reaction mixture from the reaction vessel through an external closed loop which includes an impingement mixer. The bromine-methanol feed is pumped at the proper rate and ratio into the impingement mixture whereby it impinges with the circulating reaction mixture. The resultant bromination mixture is then returned to the reaction vessel.

Abstract: A process is disclosed for preparing a mixture of brominated, non-condensed ring polyaromatics, which process features multiple bromination temperatures and multiple catalyst additions for brominating the precursor non-condensed ring polyaromatic. The mixture has an average bromine number of about 6 to about 8 bromine atoms per molecule, a low melting point range, and a low amount of light end impurities.

Abstract: A process for obtaining an improved yield of hexabromocyclododecane by utilizing a solvent in the reaction mass containing a minor amount of water.

Abstract: This invention relates to an ultraviolet-radiation stabilizer flame retarding system containing an N,N'-ethylene-bis(tetrabromophthalimide) or an N,N'-bis(tetrabromophthalimide) predominate product, a hindered-amine light stabilizer, a 2-(2'-hydroxyphenyl)benzotriazole, a titanate, and, optionally, Mg(OH).sub.2 and/or ZnO.

Abstract: Tetrabromobisphenol-A is made in high purity and increased yield by adding a methanol-bromine solution to a methanol bisphenol-A solution with vigorous agitation. The amount of methanol in the reaction vessel is adjusted to yield a ratio of tetrabromobisphenol-A to methanol when the reaction is substantially complete that provides a lower amount of Hbr impurity in the tetrabromobisphenol-A product. An increased recovery of tetrabromobisphenol-A product is achieved by adjusting the water added to the reaction vessel when the bromination reaction is essentially complete.

Abstract: This invention relates to a process for preparing a white or at least near white product which is predominant in decabromodiphenyl alkane and which has an average bromine number of at least 9.0.

Abstract: A method for producing high melting hexabromocyclododecane product by selective recovery of preferred isomers.