Abstract:
PROBLEM TO BE SOLVED: To provide a method for economically, selectively and efficiently reducing the content of amine existing in N-substituted lactams as an impurity. SOLUTION: The method for reducing the amine content of amine-contaminated N-substituted lactams comprises treating the contaminated N-substituted lactams with an acid macroporous cation exchanger. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
Procedimiento para la elaboración de una mezcla de reacción alcanólica, que se produce en la obtención de alcoxicarbonilaminotriazinas, que contiene al menos una alcoxicarbonilaminotriazina, al menos un carbonato cíclico y/o acíclico, al menos un alcanol con 1 a 13 átomos de carbono, que contiene en caso dado uno o dos átomos de oxígeno como enlace tipo éter, y en caso dado substituido por alquilo con 1 a 4 átomos de carbono y/o hidroxi, así como al menos un alcanolato alcalino o alcalinotérreo, en caso dado melamina, y en caso dado catalizador, en el que se eliminan componentes polares y/o iónicos mediante extracción con un agente de extracción polar, no miscible completamente con la fase orgánica presente en la mezcla de reacción, mediante lo cual se obtienen una fase alcanólica, que contiene al menos una alcoxicarbonilaminotriazina, y una fase polar, que contiene agente de extracción con componentes polares y/o iónicos disueltos en la misma, caracterizado porque la extracción se lleva a cabo en una unidad mezcladora/asentadora, una columna de extracción, un extractro basado en separación por campo centrífugo, o combinaciones de los mismos.
Abstract:
The present invention relates to a method for removing halogenide ions from liquid ammonia, characterized in that the liquid ammonia is brought into contact with a strongly basic ion exchanger, wherein the structure of the strongly basic ion exchanger is a covalently bonded polymer matrix. The present invention further relates to the use of an ammonia obtained according to the invention as an educt in the manufacture of amines.
Abstract:
Processes comprising: providing an alkanolic reaction mixture, the alkanolic reaction mixture comprising: at least one alkoxycarbonylaminotriazine; at least one carbonic ester; at least one C1-C13-alkanol, which alkanol may further comprise up to two ether-bound oxygen atoms and may further comprise a substituent selected from the group consisting of C1-C4-alkyls and hydroxyls; and at least one alkali metal alkoxide or alkaline earth metal alkoxide; and subjecting the alkanolic reaction mixture to extraction with a polar extractant such that at least a portion of polar/ionic components present in the reaction mixture are removed, wherein the polar extractant is less than entirely miscible with an organic phase of the reaction mixture, to form an alkanolic phase comprising the at least one alkoxycarbonylaminotriazine and a polar phase comprising the polar extractant and the portion of polar/ionic components; and wherein the extraction is carried out with one or more selected from the group consisting of mixer/settler units, columns, centrifugal field separation extractors, and combinations thereof.
Abstract:
The invention relates to a process for preparing free-flowing, pulverulent alkoxycarbonylaminotriazine from an alkanolic reaction mixture which is obtained in the preparation of alkoxycarbonylaminotriazines and comprises at least one alkoxycarbonylaminotriazine, at least one cyclic and/or acyclic carbonic ester, at least one C1-C13-alkanol which optionally comprises one or two oxygen atoms in the form of ether bonds and is optionally substituted by C1-C4-alkyl and/or hydroxyl, and also at least one alkali metal or alkaline earth metal alkoxide, with or without melamine and with or without catalyst, by atomizing and drying the reaction mixture in a spray drier.
Abstract:
A method for depleting halide ions from liquid ammonia, which comprises bringing the liquid ammonia into contact with a strongly basic ion exchanger, where the basic structure of the strongly basic ion exchanger is a covalently crosslinked polymer matrix and the content of ammonia in the liquid ammonia is more than 98% by weight.
Abstract:
(Chloro)hydrocarbon-free hydrogen chloride and phosgene-free (chloro)hydrocarbons are recovered from a hydrogen chloride stream having (chloro)hydrocarbons and phosgene. The recovery involves connecting a first adsorber and a second adsorber in series and passing the fresh hydrogen chloride stream comprising phosgene and (chloro)hydrocarbons firstly through the first adsorber and subsequently through the second adsorber until essentially no more (chloro)hydrocarbon is adsorbed by the first adsorber, passing the fresh hydrogen chloride stream through the second adsorber while the first adsorber is regenerated, with essentially phosgene-free (chloro)hydrocarbon being obtained in the regeneration, passing the fresh hydrogen chloride stream firstly through the second adsorber and subsequently through the regenerated first adsorber until essentially no more (chloro)hydrocarbon is adsorbed by the second adsorber, and passing the fresh hydrogen chloride stream through the first adsorber while the second adsorber is regenerated, with essentially phosgene-free (chloro)hydrocarbon being obtained in the regeneration.
Abstract:
The invention relates to a process for removing salts from an alkanolic reaction mixture which is obtained in the preparation of alkoxycarbonylaminotriazines and comprises at least one alkoxycarbonylaminotriazine, at least one cyclic and/or acyclic carbonic ester, at least one C 1 -C 13 -alkanol which optionally comprises one or two oxygen atoms as ether bonds and is optionally substituted by C 1 -C 4 -alkyl and/or hydroxyl, and also at least one alkali metal alkoxide or alkaline earth metal alkoxide, with or without melamine and with or without catalyst, in which salts are removed from the reaction mixture by ion exchange over a cation exchanger and/or anion exchanger.