Abstract:
The present application relates to novel chelate resins which contain, as a functional group, quaternary nitrogen atoms in structures of the general formula (I) in which at least one of the radicals R1 to R3 represents an optionally substituted radical of the series consisting of picolyl, methylquinoline or methylpiperidine, m represents an integer from 1 to 4 and M represents the polymer matrix and X represents a counterion of the series consisting of hydroxide OH−, halide, preferably Cl−, Br−, or sulphate SO42−, a process for their preparation and the use thereof, in particular the use of the novel chelate resins in hydrometallurgy and electroplating.
Abstract:
The present invention relates to a method of producing novel chelate resins based on crosslinked polymer beads starting with methacrylic compounds, containing aminomethyl groups and/or aminomethyl nitrogen heterocyclic groups as functional groups, that have a high uptake capacity for heavy metals and rapid kinetics.
Abstract:
The present invention relates to heat-stable anion exchangers based on at least one aromatic monomer and at least one crosslinker having structural elements of the general formula (I) where Ak, Ak′, Ak″ are in each case independently of one another identically or differently a C1-C18-alkyl radical, n is an even number between 5 and 18, x+y=2, where x is equal to 0 or 1, and X is Cl, Br, OH, HCO3, HSO4, ½ (SO4), ½ CO3, NO3, F, H2PO4, ½ HPO4, ⅓ PO4 with the result that these anion exchangers, preferably in the OH form, withstand a working temperature of at least 60° C., preferably of at least 80° C., over a relatively long time, a process for production thereof and also use thereof.
Abstract translation:本发明涉及基于至少一种芳族单体和至少一种具有通式(I)结构单元的交联剂的热稳定阴离子交换剂,其中Ak,Ak',Ak“在每种情况下彼此独立地相同或相同 不同的是C 1 -C 18烷基,n是5和18之间的偶数,x + y = 2,其中x等于0或1,X是Cl,Br,OH,HCO 3,HSO 4,½(SO 4 ),½CO 3,NO 3,F,H 2 PO 4,½HPO 4,1 PO 4,结果这些阴离子交换剂优选为OH形式,耐受至少60℃,优选至少80℃的工作温度。 在相当长的时间内,其生产方法及其用途。
Abstract:
An organic polyisocyanate with at least one unsaturated functional group is capable of copolymerizing when exposed to actinic radiation. The polyisocyanate comprises structural units with the formula (1): wherein: X is an electron-attracting group; R1, and R2 are hydrogen atoms, a saturated or unsaturated aliphatic or cycloaliphatic radical, or an aromatic or araliphatic radical; and n is an integer from 0 to 5. A process for producing this polyisocyanate is also disclosed.
Abstract:
The present invention relates to the use of monodisperse, macroporous chelating resins in the recovery of metals in hydrometallurgical processes, in particular in resin-in-pulp processes.
Abstract:
The present invention relates to the use of inorganic salts for increasing the adsorption of oxoanions and/or thioanalogues thereof to metal-doped ion exchangers, preferably to iron oxide/iron oxyhydroxide-containing ion exchangers, preferably from water or aqueous solutions, and also the conditioning of these metal-doped ion exchangers having increased adsorption behaviour toward oxoanions and/or thioanalogues thereof by using inorganic salts with the exception of amphoteric ion exchangers which have both acidic and basic groups as functional groups.
Abstract:
The present invention relates to a process for producing novel monodisperse cation exchangers of the poly(meth)acrylic acid type, the ion exchangers themselves, and also use thereof and to the use of intermediate products as supports for enzymes and the systems resulting therefrom as enzyme catalysts for the preparation of fuels and in transesterification reactions and esterification reactions.
Abstract:
The present invention relates to the use of amphoteric ion exchangers for adsorbing oxo anions, preferably to the use of iron oxide/iron oxyhydroxide-containing amphoteric ion exchangers for removing oxo anions from water and aqueous solutions, and to the preparation of these amphoteric iron oxide/iron oxyhydroxide-containing ion exchangers.
Abstract:
The present invention relates to reactive compositions containing A) one or more blocked polyurethane prepolymers which have a content of blocked isocyanate groups (calculated as NCO) of 0.1 to 20 wt. % and are prepared from i) at least one aromatic, aliphatic, araliphatic and/or cycloaliphatic diisocyanate having a content of free NCO groups of 5 to 60 wt. %, ii) a polyol component containing at least one polyester polyol, and/or at least one polyether polyol and/or at least one polycarbonate polyol, iii) CH-acidic cyclic ketones corresponding to formula (I) as blocking agents wherein X represents an electron-attracting group, R1 and R2 independently of one another represent the radicals H, C1-C20 (cyclo)alkyl, C6-C24 aryl, C1-C20 (cyclo)alkyl ester or amide, C6-C24 aryl ester or amide, mixed aliphatic/aromatic radicals with 1 to 24 carbon atoms that can also be part of a 4- to 8-membered ring, n is an integer from 0 to 5, and B) one or more OH-functional compounds in which the OH component undergoes activation by a deposition amine component. The present invention also relates to a composite system containing two adherends bonded together with the reactive composition according to the invention.
Abstract:
The invention relates to a process for the production of 1,5-naphthalenediamine and to the intermediates 4-(2-nitrophenyl)butyronitrile, 5-nitro-3,4-dihydro-1(2H)-naphthyl-imine, 5-nitroso-1-naphthylamine, 5-nitro-1-naphthylamine, 4-(2-aminophenyl)-butyronitrile, 5-amino-3,4-dihydro-1(2H)-naphthalene imine, 4-(2-nitrophenyl)ethyl butyrate and 4-(2-nitrophenyl)butyramide obtainable during the process.