Abstract:
Metal oxide powders comprised of Cr(III) oxide, Ti(IV) oxide, V(V) oxide, or mixtures of these, or metal mixed oxides comprised of Cr(III) oxide and Ti(IV) oxide and V(V) oxide, or their mixtures. They have BET surfaces of 5-50 m.sup.2 /g and mean particle diameters of 25-350 nm and are useful to increase conversion and selectivity in the manufacture of mono-olefins by catalytic dehydrogenation of saturated hydrocarbons. The metal oxide powders are produced from mixtures of the vaporized metal compounds chromyl chloride, titanium tetrachloride, and vanadyl chloride, in the presence of certain gases by laser pyrolysis.
Abstract:
A fuel composition containing, as major component, a gasoline having an aromatics content of not more than 42 vol % and a sulfur content of not more than 150 ppm by weight, and, as minor component, at least one gasoline additive having a detergent action or an anti-valve-seat-wear action, in which this gasoline additive contains at least one hydrophobic hydrocarbon group having a number-average molecular weight of from 85 to 20,000 and at least one polar group.
Abstract:
A process for the hydroformylation of olefins having from 20 to 400 carbon atoms by reaction of the olefins with synthesis gas in the presence of a cobalt carbonyl catalyst and recovery of the cobalt catalyst by extraction of the reaction product with an aqueous acidic solution in the presence of oxygen and separation of the organic and aqueous phases, wherein (a) the aqueous phase is separated from the organic phase by means of gravitational forces to the extent that the proportion of aqueous phase dispersed in the organic phase is 2% by weight or less, based on the organic phase, and (b) the organic phase obtained in step (a) is exposed to an electric field to coalesce the remaining dispersed aqueous phase, is described. In this way, the residual cobalt content of the hydroformylation product can be reduced to less than 1 ppm.
Abstract:
A mixture suitable as fuel additive and lubricant additive and comprising essentially (A) at least one amine which carries a hydrocarbon radical having an average molecular weight of from 500 to 10,000, (B) at least one hydrocarbon polymer which has an average molecular weight of from 300 to 10,000 and may be present in unhydrogenated or hydrogenated form and (C) at least one conventional carrier oil has a weight ratio of component A to component B of from 80:20 to 60:40.
Abstract:
Reaction products of polyolefins having predominantly a terminal double bond and a number average molecular weight of from 250 to 10,000, which possess an aliphatic hydrocarbon skeleton which is straight-chain or carries C.sub.1 -C.sub.4 -alkyl side chains, with from 1 to 10 mol, per equivalent of double bond, of one or more vinyl esters I ##STR1## are obtainable by reacting the stated polyolefins with the vinyl esters I in the presence of a free radical initiator at from 80 to 200.degree. C., it being possible for these reaction products subsequently to have been hydrolyzed to the corresponding alcohols or converted into the corresponding amines by reductive amination with amines II ##STR2## .
Abstract:
Method for applying spacing material to a sheet printed by a printing press includes providing spacing material which is solid at least at ambient temperature, spotwise applying individual spacing material particles formed from the spacing material onto a surface of the sheet, and fixing the applied spacing material particles to the sheet; and a printing-press device for performing the method.
Abstract:
Fuels for gasoline engines contain small amounts of polyetheramines IR.sup.1 --(OBu).sub.n --NR.sup.2 R.sup.3 (I)whereR.sup.1 is C.sub.2 -C.sub.30 -alkyl,R.sup.2 and R.sup.3, independently of one another, are each hydrogen, C.sub.1 -C.sub.8 -alkyl, aminoalkylene of the general formula II--R.sup.4 --NR.sup.5 R.sup.6 (II)or polyaminoalkylene of the general formula III--(R.sup.4 --NR.sup.5).sub.m --R.sup.6 (III)whereR.sup.4 is C.sub.2 -C.sub.10 -alkylene, R.sup.5 and R.sup.6, independently of one another, are each hydrogen or C.sub.1 -C.sub.8 -alkyl and m is from 2 to 8,Bu is a butylene radical derived from butylene oxide andn is from 12 to 28.
Abstract:
An amine mixture includes a polyisobuteneamine and an aliphatic amine. The amine mixture is obtained by reductive amination of a mixture with ammonia or an amine HNR2R3. The mixture can be a mixture of the oxo process product formed in the hydroformylation of polybutene or polyisobutene and an alkanol R4—OH. The mixture can also be a mixture of the epoxide formed in the epoxidation of polybutene or polyisobutene and an alkanol R4—OH. Or, instead, the mixture can be a mixture of the nitro compound formed in the reaction of polybutene or polyisobutene with nitrogen oxides and an alkanol R4—OH. The amine mixture is suitable for cleaning and keeping clean intake valves and injection nozzles in gasoline engines.
Abstract translation:胺混合物包括聚异丁烯胺和脂族胺。 通过与氨或胺HNR 2 R 3的混合物的还原胺化得到胺混合物。 该混合物可以是在聚丁烯或聚异丁烯的加氢甲酰化中形成的羰基加成产物和链烷醇R4-OH的混合物。 混合物也可以是在聚丁烯或聚异丁烯的环氧化中形成的环氧化物和链烷醇R4-OH的混合物。 或者,相反,混合物可以是在聚丁烯或聚异丁烯与氮氧化物和烷醇R4-OH的反应中形成的硝基化合物的混合物。 胺混合物适用于清洁和保持汽油发动机中的清洁进气阀和喷嘴。
Abstract:
Novel fuels for gasoline engines comprise a synergistic mixture of a detergent additive component (A) and a synthetic carrier oil component (B), i) the detergent additive component (A) comprising at least one compound having a basic nitrogen atom which is substituted by a hydrocarbyl radical having a number average molecular weight of from about 500 to 1 300, and the detergent additive component (A) being contained in the fuel in an amount of from about 30 to 180 ppm by weight; and ii) the carrier oil component (B) comprising at least one compound of the following formula I R—O—(A—O)x—H (I)where R is a straight-chain or branched C6-C18-alkyl group; A is a C3- or C4-alkylene group; and x is an integer from 5 to 35; the carrier oil component (B) being contained in the fuel in an amount of from about 10 to 180 ppm by weight.
Abstract:
In a process for the hydroformylation of olefins having from 12 to 100 carbon atoms in the presence of a cobalt carbonyl catalyst at pressures of from 100 to 400 bar and at from 100 to 200° C., depressurization and recovery of the cobalt catalyst by extraction with an aqueous acid solution in the presence of atmospheric oxygen, (a) the extraction is carried out in the presence of a polymeric emulsion breaker selected from the group consisting of alkoxylated compounds containing amino, imino or OH groups, and (b) to achieve complete phase separation in the organic phase still containing small amounts of aqueous phase, the formation of relatively large droplets of the dispersed aqueous phase is effected in a coalescence stage.