摘要:
Surfactants with polyether sulfonate structure, which have a propanonylsulfonic acid group as a head group, a process for preparing such surfactants and their use for tertiary mineral oil extraction.
摘要:
Water-soluble, hydrophobically associating copolymer comprising a monoethylenically unsaturated, water-soluble, surface-active monomer (a), and a monoethylenically unsaturated, hydrophilic monomer (b) different from monomer (a). The copolymer is prepared in the presence of a nonpolymerizable surfactant and has marked thickening properties in aqueous systems.
摘要:
Surfactants of the general formula R1—X where R1 is an aliphatic C17H35-alkyl radical and X is a hydrophilic group, and the mean degree of branching of the R1 radical is from 2.8 to 3.7. Mixtures which comprise such surfactants and the use of such surfactants and of mixtures thereof for tertiary mineral oil extraction.
摘要:
A process is proposed for blocking underground formations in the extraction of fossil oil and/or gas, a first step involving introducing water-absorbing particles into liquid-bearing and porous rock formations, said particles being water-swellable, crosslinked and water-insoluble polymers, said particles in the water-bearing rock formation finally preventing liquid flow through the rock layers by water absorption. This process is characterized in that the absorbing particles comprise a superabsorbent polymer with anionic and/or cationic properties and a retarded swelling action. This process, which can also be carried out in saline formation waters, is notable in that the swelling of the superabsorbents used begins no earlier than after five minutes and in that the superabsorbents are obtainable by four proposed process variants and any combination thereof. This process, which does not need a carrier liquid, is notable for its simplicity and especially the controllable retardation of the swelling action under the specific conditions of underground rock formations.
摘要:
The use of a surfactant mixture comprising at least one surfactant having a hydrocarbon radical composed of from 12 to 30 carbon atoms and at least one cosurfactant having a branched hydrocarbon radical composed of from 6 to 11 carbon atoms for tertiary mineral oil extraction.
摘要:
The use of a surfactant mixture comprising at least one surfactant having a hydrocarbon radical composed of from 12 to 30 carbon atoms and at least one cosurfactant having a branched hydrocarbon radical composed of from 6 to 11 carbon atoms for tertiary mineral oil extraction.
摘要:
Water-soluble copolymers which comprise, in copolymerized form, (a) 60 to 99% by weight of at least one monoethylenically unsaturated polyalkylene oxide monomer of the formula I H2C═CR1—X—YR2—OnR3 I in which the variables have the following meanings: X is —CH2— or —C(O)—, if Y is —O—; is —C(O)—, if Y is —NH—; is —O— or —O—(CH2)4—, if Y is a chemical bond; Y is —O—, —NH— or a chemical bond; R1 is hydrogen or methyl; R2 is C2-C4-alkylene radicals, which may be identical or different and also linear or branched, but where at least 50% of the radicals R2 are ethylene; R3 is C1-C22-alkyl, phenyl, p-(C1-C12-alkyl)phenyl or hydrogen; n is an integer from 6 to 50, (b) 1 to 40% by weight of at least one nonquaternized dipolar monomer comprising at least one nitrogen atom, (c) 0 to 39% by weight of other nonionic monoethylenically unsaturated monomers and (d) 0 to 10% by weight of other anionic monoethylenically unsaturated monomers and have an average molecular weight Mw of from 2000 to 500 000 D, and the use of the copolymers as dispersants and sequestrants for pigmented materials, as additive for detergents, laundry pretreatment compositions, cleaners for hard surfaces, dentifrices and bodycare compositions, and as auxiliaries for textile processes, paper making and paper processing and deinking processes.
摘要:
The present invention relates to the use of at least one protein, in particular at least one hydrophobin or at least one derivative thereof, for improving phase separation in compositions comprising at least two liquid phases, to methods for separating at least two liquid phases in a composition comprising at least two liquid phases, and to formulations comprising at least one compound selected from the group consisting of fuels, combustibles, crude oils or water-soluble or oil-soluble polymer solutions and at least one protein, in particular at least one hydrophobin or derivatives thereof.
摘要:
The present invention relates to copolymers which are obtainable from the free radical copolymerization of at least (a) a monoethylenically unsaturated carboxylic acid having 3 to 6 carbon atoms or the anhydride thereof with (b) a reaction mixture comprising a component of the general structural formula where R1, R2, R3, R4, independently of one another, are H or C1- to C4-alkyl, n and m, independently of one another, are an integer from 1 to 100 and R5 is H or methyl, a process for the preparation of the polymer according to the invention and the use thereof as a scale inhibitor.