摘要:
The present invention relates to a process for preparing a quaternary ammonium compound, which comprises reacting an amine compound containing at least one sp3-hybridized nitrogen atom with a dialkyl sulfate at ambient pressure with participation of both alkyl groups of the dialkyl sulfate and, if appropriate, subjecting the resulting quaternary ammonium compound containing sulfate anions to an anion exchange.
摘要:
The present invention relates to a process for preparing quaternary ammonium compounds, which comprises reacting compounds comprising an sp3-hybridized nitrogen atom with a dialkyl sulfate or trialkyl phosphate and subjecting the resulting ammonium compound to an anion exchange.
摘要:
The present invention relates to a liquid composition which comprises at least one polymer and at least one ionic liquid, the cations of which are derived from polycyclic amidine bases, and a process for isolating cellulose from cellulose-containing sources using at least one such ionic liquid.
摘要:
The present invention relates to a process for preparing quaternary phosphonium salts by reacting a ternary phosphine with an optionally substituted, saturated or monounsaturated or polyunsaturated electrophile having from 3 to 25 carbon atoms in ternary solvent mixtures.
摘要:
The present invention relates to a process for preparing vitamin A acetate by reacting β-vinylionol with triphenylphosphine in the presence of sulfuric acid in a solvent mixture consisting of 60 to 80% by weight methanol, 10 to 20% by weight water and 10 to 20% by weight aliphatic, cyclic or aromatic hydrocarbons having 5 to 8 carbon atoms to give β-ionylideneethyltriphenylphosphonium salts and subsequent Wittig reaction with 4-acetoxy-2-methylbut-2-enal.
摘要:
The present invention relates to a liquid composition which comprises at least one polymer and at least one ionic liquid, the cations of which are derived from polycyclic amidine bases, and a process for isolating cellulose from cellulose-containing sources using at least one such ionic liquid.
摘要:
The present invention relates to a method for improving the hydrolysis stability of an ionic liquid (IL), in which at least one tertiary amine or one quaternary ammonium compound different from the ionic liquid (IL) is added to an ionic liquid (IL).
摘要:
Process for preparing quaternary ammonium compounds by reacting the corresponding tertiary sp3-hybridized amine or sp2-hybridized imine with dimethyl sulfite, wherein the reaction is carried out (i) in the presence of an inorganic or organic protic acid having a pKa of from 1.8 to 14, measured at 25° C. in aqueous solution; and (ii) at a temperature of from 10 to 100° C.
摘要翻译:通过使相应的叔三异丙基胺或sp2-2杂化亚胺与亚硫酸二甲酯反应制备季铵化合物的方法,其中反应进行(i) 在25℃下在水溶液中测定的pK u> a> 1〜14的无机或有机质子酸的存在; 和(ii)在10-100℃的温度下
摘要:
In the process for preparing ionic liquids, an ionic liquid is firstly reacted with an alkoxide or with barium hydroxide and is subsequently neutralized with an acid. The ionic liquid contains a phosphonium and/or ammonium cation and an anion selected from the group consisting of halides, arylsulfonates, alkylsulfonates, sulfate, hydroxysulfate, alkylsulfates, hydrogencarbonate, carbonate. triflate and carboxylates. In this process, virtually any anions can be introduced into the ionic liquids.
摘要:
In the process for preparing ionic liquids, an ionic liquid is firstly reacted with an alkoxide or with barium hydroxide and is subsequently neutralized with an acid. The ionic liquid contains a phosphonium and/or ammonium cation and an anion selected from the group consisting of halides, arylsulfonates, alkylsulfonates, sulfate, hydroxysulfate, alkylsulfates, hydrogencarbonate, carbonate. triflate and carboxylates. In this process, virtually any anions can be introduced into the ionic liquids.