摘要:
The subject invention relates to salts of polymaleic acids having a molecular weight between 200 and 1500 and to their use in preventing the corrosion of metal caused by hydrogen sulfide and carbon dioxide in water-in-oil emulsions such as crude oil.
摘要:
The subject invention relates to corrosion inhibitors prepared by reacting certain imidazolines or precursors thereof with sulfur. The corrosion inhibitors are particularly useful in inhibiting corrosion of metal tanks caused by CO.sub.2 and H.sub.2 S ("acid gas") during the transport and storage of crude oils.
摘要:
The subject invention relates to compositions which inhibit the corrosion caused by CO.sub.2 and H.sub.2 S in the transport and storage of crude oils, which are generally water-in-oil, in particular salt-water-in-oil emulsions. The corrosion inhibitors are mixtures of certain imidazoline or tetrahydropyrimidine derivatives, precursors thereof, or their complexes with sulfur and certain maleinamidic acids.
摘要:
The invention relates to corrosion inhibitors which are amides of cyclic amidines. The inhibitors are particularly useful for preventing the corrosion of metals caused by H.sub.2 S and CO.sub.2 in water-in-oil, particularly in saltwater-in-oil emulsions.
摘要:
An Otto-cycle engine fuel containing a small amount of an amide, amide/ammonium salt and/or ammonium salt of an aminoalkylene polycarboxylic acid and a long-chain secondary amine as additive for cleaning the carburetor and valves.
摘要:
The present invention relates to the use of trialkanolamine polyethers obtained by condensation of one or more trialkanolamines in the presence of phosphorous acid and/or hypophosphorous acid as demulsifiers for oil-in-water emulsions.
摘要:
A method of demulsifying a crude oil and water composition involves adding demulsifiers made from acrylic acid/methacrylic acid copolymerized with hydrophilic monomers.
摘要:
Copolymers which containa) from 50 to 90% by weight of C.sub.8 -C.sub.40 -alkyl methacrylates, vinyl esters of C.sub.8 -C.sub.40 -carboxylic acids or mixtures thereof andb) from 10 to 50% by weight of monoethylenically unsaturated C.sub.3 -C.sub.12 -carboxylic acids, monoethylenically unsaturated dicarboxylic anhydrides, monoesters or monoamides of monoethylenically unsaturated C.sub.4 -C.sub.12 -dicarboxylic acids, amides of C.sub.3 -C.sub.12 -monocarboxylic acids or mixtures thereofas copolymerized units and have molecular masses of from 500 to 30,000 are used in at least partially neutralized form in aqueous solution or dispersion for making leather and furs water repellent.
摘要:
A process for the preparation of ether sulfonates or polyglycol ether sulfonates by reacting an organic alcoholic or phenolic compound or the corresponding alkoxylate in aqueous solution with vinyl sulfonate in the presence of from 0.1 to 3.0% by weight of an alkaline catalyst and, if required, additionally in the presence of a phase-transfer catalyst, and ether sulfonates or polyglycol ether sulfonates prepared by this process and of the general formulaR--O(C.sub.n H.sub.2n O).sub.z --CH.sub.2 CH.sub.2 SO.sub.3 Xwhere R is H or an aliphatic or aromatic hydrocarbon radical (which may contain nitrogen as a heteroatom) of 1 to 30 carbon atoms, n is from 2 to 30, z is from 0 to 300 and X is an alkali metal.
摘要:
Mineral oil middle distillate compositions based on hydrocarbon mixtures whose boiling range begins at above 160.degree. C. and ends at below 420.degree. C. contain, as paraffin dispersants, reaction products of aminoalkylenecarboxylic acids with primary or secondary long-chain amines.