摘要:
Olefin polysulfide compositions of high sulfur content and of very low chlorine content are obtained by a process comprising the steps of: (1) reacting sulfur mono- and/or dichloride with at least one aliphatic monoolefin of 2-12 carbon atoms, to form an addition product or "adduct", (2) reacting hydrogen sulfide with an alkali hydroxide or ammonium hydroxide dissolved in at least one substantially anhydrous C.sub.1 -C.sub.4 aliphatic monoalcohol, with optional addition of elemental sulfur, (3) contacting said "adduct" together with at least one monohalogenated hydrocarbon compound, with the alcoholic solution obtained at the end of step (2), (4) heating the resultant mixture from step (3), removing the monoalcohol, while adding water, and (5) after settling and removal of the aqueous phase, recovering the organic phase formed at least in major part of the desired olefin polysulfide composition. These compositions, of sulfur content up to 65% by weight and of chlorine content generally lower than about 0.1% by weight, are used in particular as additives for improving the extreme-pressure properties of lubricants.
摘要:
Compositions of copolymers are disclosed containing 10 to 35% by weight of units derived from at least one vinylaromatic monomer, 5 to 15% by weight of units derived from at least one linear or branched alkyl methacrylate with 1 to 4 carbon atoms, 20 to 50% by weight of units derived from at least one linear alkyl methacrylate with 8 to 14 carbon atoms and 15 to 50% by weight of units derived from at least one linear alkyl methacrylate with 16 to 22 carbon atoms. The copolymer compositions have a weight average molecular weight of 100,000 to 400,000 and a polydispersity index in general of less than 5.They are prepared by any free-radical copolymerization method using for example azo or peroxide initiators.These compositions have the advantage of providing a better compromise between the characteristics required of a viscosity additive for lubricating oils.
摘要:
New superbasic detergent additives are manufactured in two steps. The first step comprises the reaction of a sulfonic acid with an excess of oxide or hydroxide of lithium or group II A metal. The second step consists of carbonating the oxide or hydroxide in excess. The manufacture is conducted in the presence of a polyalkenylsuccinimide-amine salt.
摘要:
There are disclosed lubricating compositions consisting of homogeneous mixtures of:a. from 50 to 99% by weight of at least one mineral or synthetic hydrocarbon oil of lubricating viscosity,B. from 1 to 50% by weight of at least one complex ester composition formed as between at least one polycarboxylic acid selected from dimeric and trimeric unsaturated fatty acids, optionally hydrogenated, at least one dihydroxyl compound selected from polyalkylene glycols and diols, and at least one monofunctional compound comprising at least one monocarboxylic acid or at least one monohydroxyl compound selected from monohydric alcohols or monohydric phenols and oxyalkylenated monohydric alcohols or monohydric phenols, with the condition that one at least of the mono- or dihydroxyl compounds comprises a compound with oxyalkylene groups, andC. from 0 to 40% by weight of at least one light ester.These compositions are usable as bases for multigrade oils with the addition of low amounts of viscosity index improvers, or without any addition of such additives.
摘要:
Novel (poly)sulfurized carboxylic compounds, their preparation, and their use as additives to lubricating oils are disclosed. Such novel carboxylic compounds are more particularly esters of the general formula:[R.sup.3 --OC(O)--].sub.q R.sup.2 {--C(O)O--(CH.sub.2).sub.m --CH.sub.3-z [--(CH.sub.2).sub.n --S.sub.x --R.sup.1 ].sub.z }.sub.p (1)wherein R.sup.1 is a saturated or unsaturated monovalent aliphatic radical with 1 to 30 carbon atoms; the number x is equal to or greater than 1; z equals 1 or 2; when z equals 1, n is an integer from 0 to 5 and m an integer from 0 to 0.5, with m+n an integer from 1 to 10; when z equals 2, n is an integer from 1 to 5 and m an integer from 0 to 5, with m+n an integer from 1 to 10; R.sup.2 is a hydrocarbon radical with 1 to 31 carbon atoms and a valency of p+q; R.sup.3 is a hydrogen atom or an aliphatic radical with 1 to 30 carbon atoms; p is an integer from 1 to 4; and q is an integer from 0 to 3, with p+q being an integer from 1 to 4. They are obtained by esterifying carboxylic acid R.sup.2 (--COOH).sub.p+q with a (poly)sulfurized monoalcohol:[R.sup.1 --S.sub.x --(CH.sub.2).sub.n --].sub.z CH.sub.3-z --(CH.sub.2).sub.m --OHand possibly an alcohol R.sup.3 OH. They are used as anti-wear and extreme pressure additives in lubricating oils.
摘要:
Polysulphurized olefin compositions used as additives for gear oils, cutting oils, and as sulphurizing agents in organic media are obtained by a process comprising:a stage (1) in which at least one compound chosen from among sulphur dichloride and monochloride is reacted with at least one aliphatic monpolefin with 2 to 12 carbon atoms, thus forming an adduct;a stage (2) in which sulphurized hydrogen and at least one mercaptan is reacted with ammonium or alkali metal hydroxide dissolved in at least one aliphatic monoalcohol with 1 to 4 carbon atoms, which is substantially anhydrous, so as to give an alcoholic solution;a stage (3) in which contacting takes place between the adduct obtained in stage (1) and the alcoholic solution obtained in stage (2);a stage (4), in which the resulting mixture is heated and then the aliphatic monoalcohol is eliminated by distillation, while adding water in a quantity adequate for maintaining in solution the reagents and the mineral products formed during the reaction; anda stage (5) in which elimination takes place of the aqueous phase and recovery takes place of the organic phase mainly constituted by the polysulphurized olefin composition.
摘要:
Useful as additive for lubricating oils are novel phosphosulphur compounds in accordance with the general formula (I):(((R.sup.1 --S.sub.x --O.sub.y --A--).sub.r B.sub.v).sub.p P(X)--Y.sub.i --).sub.q Z.sub.min which e.g. R.sup.1 represents an alkyl or alkenyl group, A represents the group --(CH.sub.2).sub.n --O--, B represents the group --P(S)--S--CH.sub.2 --(CH.sub.3)--O--, X represents an oxygen atom or a sulphur atom, Y represents an oxygen atom, a sulphur atom or an oxygen or sulphur-containing hydrocarbon chain, Z represents a hydrogen, chlorine or sulphur atom, a polysulphide chain, a metal or an alkyl or alkenyl group, x=1,2 or 3, y=0, 1 or 2, v is 0 or 1, r is 1 (if v=0) or r=2 (if v=1), p=2 or 3, t=0 or 1, m=0,1 or 2, q=the valency of Z if Z is a metal or q=1 or 2 and n is an integer from 1 to 30.
摘要:
The invention relates to a process for treating a new or regenerated catalyst containing a support having as a base at least one metal or metalloid oxide and at least one active metal, comprising treating the catalyst with at least one sulfuration agent dissolved in a solvent.The invention is charcterized in that the sulfuration agent is a polysulfide with the following general formulaR'--S.sub.y --R--S.sub.x --R--S.sub.y).sub.n R'where R is a linear or a branched organic radical comprising from 2 to 12 carbon atoms; R' is an alkyl, alkenyl, arylalkyl or arylalkenyl radical comprising from 1 to 12 carbon atoms, R' possibly comprising at least one heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur; x has a value of from 1 to 4; y has a value of from 1 to 8 and n is such that the average molar mass of the polymer is about 5000.
摘要:
The invention relates to compounds of the metal dihydrocarbyl-dithiophosphyl-dithiophosphate type, their manufacture and use. These compounds can be represented by the general formula: ##STR1## wherein R is a monovalent substantially hydrocarbon-containing radical of 1 to 30 carbon atoms, X and Y are each a hydrogen atom or a monovalent substantially hydrocarbon-containing radical of 1 to 30 carbon atoms, M is a metal selected from zinc, cadmium, lead and antimony or an oxygen- and/or sulfur-containing molybdenum complex, and n is the valence of said metal M. The compounds according to the invention can be used as additives for lubricants wherein they act as a very efficient wear preventive.
摘要:
A colloidal product is provided containing boron and phosphorus obtained by a process comprising:(1) providing a borated overbased sulfonate selected from the group consisting of a borated overbased alkali metal sulfonate and a borated, overbased alkaline-earth sulfonate;(2) reacting the borated overbased sulfonate with at least one phosphorus sulfide; and(3) separating the product obtained.