Abstract:
A method for producing bifunctional polyisobutenes, according to which method isobutene or a monomer mixture containing isobutene is polymerized in the presence of a Lewis acid and a compound of formula (I), where X represents an acyl radical or the radical of an organic or inorganic acid group, R 1 to R 4 are identical or different and represent hydrogen or a hydrocarbyl.
Abstract:
Preparation of polyisobutylene whose content of terminal double bonds is more than 50% via polymerization of isobutene using a polymerization catalyst conventional for this purpose, from an industrial C4 hydrocarbon stream which comprises 1-butene, 2-butene and isobutene and which can comprise up to 3000 ppm by weight of 1,3-butadiene, by reducing the content of oxygenates in the C4 hydrocarbon stream, prior to polymerization of the isobutene, via contact with an inorganic adsorbent at a pressure of from 1 to 20 bar and at a temperature of from 20 to 220°C.
Abstract:
The invention relates to the use of certain ethers as activity-enhancers for water-soluble biocides in homopolar hydrocarbons. The invention also relates to the use of at least one water-soluble biocide combined with at least one of said ethers for controlling micro-organisms and/or for reducing or preventing the multiplication of micro-organisms in essentially water-immiscible hydrocarbons. The invention also relates to additive compositions and hydrocarbon compositions comprising such ethers and biocides, and to a method for controlling micro-organisms and/or for reducing or preventing the multiplication of micro-organisms in hydrocarbons, according to which such a biocide and at least such an ether are added to the hydrocarbon.
Abstract:
A lubricant composition including a base oil and from 0.01 to 10 wt. % of an amine compound based on a total weight of the lubricant composition. The amine compound has the formula R1(R2)NH, where R1 and R2 are each independently straight or branched chain acyclic alkyl groups having from 1 to 20 carbon atoms. The alpha carbon of R1 or R2 is primary if R1 or R2 is an alkyl group having more than one carbon atom respectively. At least 90 wt. % of the amine compound remains unreacted in the lubricant composition based on a total weight of the amine compound prior to any reaction in the lubricant composition.
Abstract:
The invention relates to the production of highly reactive isobutene homo or copolymers having a content of vinylidene double bonds per polyisobutene chain termination of at least 50 mol % and a polydispersity of preferably 1.05 to less than 3.5, wherein isobutene or a monomer mixture containing isobutene is polymerized in the presence of an aluminum trihalogenide donor complex acting as a polymerization catalyst, in particular an aluminum trichloride donor complex, comprising an organic compound having at least one ether function or a carboxylic acid ester function as the donor.
Abstract:
The invention relates to antifreezing agent/corrosion protection concentrates containing, with regard to the total amount of the concentrate, 10 to 50 % by weight of glycerin, to methods for producing concentrates of this type from super concentrates, aqueous antifreezing agent compositions from these concentrates, and to the their use, for example, in internal combustion engines.
Abstract:
A lubricant composition including a base oil and from 0.01 to 10 wt. % of an amine compound based on a total weight of the lubricant composition. The amine compound has the formula R1(R2)NH, where R1 and R2 are each independently straight or branched chain acyclic alkyl groups having from 1 to 20 carbon atoms. The alpha carbon of R1 or R2 is primary if R1 or R2 is an alkyl group having more than one carbon atom respectively. At least 90 wt. % of the amine compound remains unreacted in the lubricant composition based on a total weight of the amine compound prior to any reaction in the lubricant composition.
Abstract:
Preparation of polyisobutylene whose content of terminal double bonds is more than 50% via polymerization of isobutene using a polymerization catalyst conventional for this purpose, from an industrial C4 hydrocarbon stream which comprises 1-butene, 2-butene and isobutene and which can comprise up to 3000 ppm by weight of 1,3-butadiene, by reducing the content of oxygenates in the C4 hydrocarbon stream, prior to polymerization of the isobutene, via contact with an inorganic adsorbent at a pressure of from 1 to 20 bar and at a temperature of from 20 to 220°C.