摘要:
A process is described for purifying polyalkylene glycols obtained by adding alkylene oxide to alkylene glycol, in which, after addition is complete, the resultant polyalkylene glycol is treated at a pH of >7 with a bleaching agent selected from the group consisting of peroxides, peracids, percarbonates, perborates, peroxodisulfates or oxygen, in each case with or without addition of a bleaching activator. The process is suitable in particular for preparing polyethylene glycol having molar weights from 196 to 203 g/mol which meets requirements of pharmacopeias.
摘要:
A process is described for purifying polyalkylene glycols obtained by adding alkylene oxide to alkylene glycol, in which, after addition is complete, the resultant polyalkylene glycol is treated at a pH of >7 with a bleaching agent selected from the group consisting of peroxides, peracids, percarbonates, perborates, peroxodisulfates or oxygen, in each case with or without addition of a bleaching activator.The process is suitable in particular for preparing polyethylene glycol having molar weights from 196 to 203 g/mol which meets requirements of pharmacopeias.
摘要:
Perylene derivatives of the general formula I where X and Y are independently oxygen, —NR1 or —NR2; R1 and R2 are independently hydrogen, C1–C18-alkyl, C5–C7-cycloalkyl, aryl or C1–C6-alkoxy; R3 to R10 are independently hydrogen, hydroxyl or aryl, although radicals conjointly attached to one carbon atom may also be ═O or ═CHR11, R11 is hydrogen or C1–C3-alkyl, with the proviso that said perylene derivative I contains from at least one to not more than three carbonyl groups per molecule.
摘要:
The invention relates to a degreaser for treating hides, skins, pelts and other intermediates in leather and fur manufacture and also wool or related proteinaceous materials that is based on nonionic surfactants of the type of alcohol alkoxylates, comprising alcohol alkoxylates obtained by reaction of at least one alcohol ROH with n mol of at least one alkylene oxide per mole of alcohol ROH, where R is an alkyl radical of 5 to 30 carbon atoms which has a main chain, of 4 to 29 carbon atoms that has at least one C1— to C10-alkyl branch attached in the chain middle; the alkylene oxide has 2 to 6 carbon atoms, and n is an integer from 1 to 100. The invention further relates to a process for degreasing hide, skins, pelts and other intermediates of leather and fur manufacture and wool or related proteinaceous materials, which comprises using a degreaser according to the present invention, and to the use of the degreasers.
摘要:
Perylene derivatives of the general formula I where X and Y are independently oxygen, —NR1 or —NR2; R1 and R2 are independently hydrogen, C1-C18-alkyl, C5-C7-cycloalkyl, aryl or C1-C6-alkoxy; R3 to R10 are independently hydrogen, hydroxyl or aryl, although radicals conjointly attached to one carbon atom may also be ═O or ═CHR11, R11 is hydrogen or C1-C3-alkyl, with the proviso that said perylene derivative I contains from at least one to not more than three carbonyl groups per molecule.
摘要:
The alkoxylate mixtures comprise alkoxylates of the formula (I) C5H11CH(C3H7)CH2O(A)n(B)mH (I) where A is ethyleneoxy, B is C3-10-alkyleneoxy or mixtures thereof, where groups A and B may be present in random distribution, alternately or in the form of two or more blocks in any order, n is a number from 0 to 30, m is a number from 0 to 20 n+m is at least 1 where 70 to 99% by weight of alkoxylates A1 in which C5H11 has the meaning n-C5H11, and 1 to 30% by weight of alkoxylates A2 in which C5H11 has the meaning C2H5CH(CH3)CH2 and/or CH3CH(CH3)CH2CH2, are present in the mixture.
摘要翻译:烷氧基化物混合物包括式(I)的烷氧基化物:在线式描述=“In-line Formulas”end =“lead”→> 5 sub> (C 3 H 2)CH 2(O)(A)N(B)m H(I)<?in-line-formula description =“In-line Formulas”end =“tail”?>其中A是乙烯氧基,B是C 3-10 - 亚烷基氧基 或其混合物,其中组A和B可以以任意顺序交替地或以两个或多个嵌段的形式以随机分布的形式存在,n为0至30的数,m为0至20 n + m的数 至少为1,其中70至99重量%的其中C 5 H 11 N的烷氧基化物A1具有含义nC 5 H 11重量%和1至30重量%的C 5 H 11的烷氧基化物A2具有C 2 H 2 H CH 3(CH 3)CH 2和/或CH 3 CH 3(CH 3)3 >)CH 2 CH 2 2存在于混合物中。
摘要:
The invention provides a process for preparing polyetherols of polyhydric alcohols by reacting an alkylene oxide with the appropriate polyhydric alcohol in the presence of a base and in the presence or absence of a solvent, wherein the polyhydric alcohol used has a formaldehyde acetal content of less than 500 ppm.
摘要:
Preparation of N,N'-di(C.sub.1 -C.sub.4 alkyl)perylene-3,4,9,10-tetracarboxylic acid diimides (I) by the reaction of perylene-3,4,9,10-tetracarboxylic acid diimide (II) with a C.sub.1 -C.sub.4 alkyl halide, in which the reaction is carried out in a dipolar-aprotic organic solvent in the presence of an inorganic base.
摘要:
The alkoxylate mixtures comprise alkoxylates of the formula (I) C5H11CH(C3H7)CH2O(A)n(B)mH (I) where A is ethyleneoxy, B is C3-10-alkyleneoxy or mixtures thereof, where groups A and B may be present in random distribution, alternately or in the form of two or more blocks in any order, n is a number from 0 to 30, m is a number from 0 to 20 n+m is at least 1 where 70 to 99% by weight of alkoxylates A1 in which C5H11 has the meaning n-C5H11, and 1 to 30% by weight of alkoxylates A2 in which C5H11 has the meaning C2H5CH(CH3)CH2 and/or CH3CH(CH3)CH2CH2, are present in the mixture.
摘要翻译:烷氧基化物混合物包括式(I)的烷氧基化物:在线式描述=“In-line Formulas”end =“lead”→> 5 sub> (C 3 H 2)CH 2(O)(A)N(B)m H(I)<?in-line-formula description =“In-line Formulas”end =“tail”?>其中A是乙烯氧基,B是C 3-10 - 亚烷基氧基 或其混合物,其中组A和B可以以任意顺序交替地或以两个或多个嵌段的形式以随机分布的形式存在,n为0至30的数,m为0至20 n + m的数 至少为1,其中70至99重量%的其中C 5 H 11 N的烷氧基化物A1具有含义nC 5 H 11重量%和1至30重量%的C 5 H 11的烷氧基化物A2具有C 2 H 2 H CH 3(CH 3)CH 2和/或CH 3 CH 3(CH 3)3 >)CH 2 CH 2 2存在于混合物中。