Abstract:
Compositions represented by the structures ##STR1## where Ar represents an aromatic group, each R is independently a hydrocarbyl group, at least one R having more than 12 carbon atoms, a is 1 to 4, and R' is hydrogen or alkyl, are useful as lubricant and fuel additives and as intermediates for the preparation of derivatives useful as such additives.
Abstract:
Azo dyes of the formula ##STR1## where the ring A may be benzofused, n is 0 or 1, and R.sup.1 -R.sup.8 are as defined, as pH-dependent markers for hydrocarbons, hydrocarbons containing the above-mentioned azo dyes, and a method for detecting these azo dyes in hydrocarbons.
Abstract:
Homo- or co-polymers derived from one or more alpha-olefins having a number average molecular weight of up to 15,000 and an isotacticity of 75% or greater, and their use as Cold Flow Improvers in crude, fuel or lubricating oil.
Abstract:
The pour point of paraffin-containing liquids is reduced by adding to the liquid an effective amount of a pour point depressant which is the reaction product of a hydrocarbyl-substituted phenol having a number average of greater than 30 carbon atoms in the hydrocarbyl-substituent, and an aldehyde of 1 to about 12 carbon atoms, or a source therefor. The pour point depressant is particularly useful for treating crude oils which have an initial pour point of 4.degree. C. or higher.
Abstract:
Compositions comprising hydroxyl group containing acylated nitrogen compounds, a process for reacting certain carboxylic reactants with olefinic compounds then reacting the product prepared thereby with ammonia, a hydrazine or an amine, products prepared thereby and lubricating oil and fuel compositions.
Abstract:
Gaseous or liquid hydrocarbon is treated with a scavenging compound comprising an oil soluble 1,3,5-trihexahydro-1,3,5-tert.-butyltriazine. The compound is an effective nonregenerated scavenger for oil field produced fluids, particularly sour hydrocarbon liquids.
Abstract:
Compounds of the formula I below are useful as additives in oleaginous compositions: ##STR1## wherein B represents an aromatic system, A represents a hydrocarbyl group, R.sup.1 and R.sup.2 are the same or are different and each independently is an aliphatic hydrocarbyl group containing 10-40 carbon atoms, provided that one of R.sup.1 and R.sup.2 may represent hydrogen; z is at least 1 and wherein the aromatic system carries at least one substituent group which is an activating group for the ring system or a derivative of an activating group.
Abstract:
A distillate fuel composition for reducing silver corrosion in two-cycle internal combustion engines which comprises motor gasoline, a lubricating oil basestock and a combination of a 2,5-dihydrocarbyldithio-1,3,4-thiadiazole of the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently R.sup.3 S or H where R.sup.3 is a hydrocarbyl group containing from 1 to 16 carbon atoms with the proviso that at least one of R.sup.1 and R.sup.2 is not hydrogen, and an adduct of benzotriazole or tolyltriazole and an alkoxyamine.
Abstract:
Polyoxyalkylene polylactone aminocarbamates having the formula: ##STR1## wherein R.sub.1 is a hydrocarbyl group having a sufficient number of carbon atoms to render the compound soluble in hydrocarbons boiling in the gasoline or diesel fuel range;R.sub.2 and R.sub.3 are each independently hydrogen or lower alkyl having about 1 to about 6 carbon atoms and each R.sub.2 and R.sub.3 is independently selected in each --O--CHR.sub.2 --CHR.sub.3 -- unit;R.sub.4 is an alkylene group of about 2 to about 5 carbon atoms;A is a polyamine moiety having at least one basic nitrogen atom;x is an integer from about 1 to about 100; andy is an integer from about 1 to about 25.The polyoxyalkylene polylactone aminocarbamates of formula I are useful as fuel additives for the prevention and control of engine deposits.