摘要:
Highly pure triethylenediamine is obtained by a process in which triethylenediamine is freed from high boilers and then the triethylenediamine is vaporized from the mixture thus obtained and is passed into a liquid solvent. The process makes it possible in particular to obtain highly pure solutions of triethylenediamine. Crystallization is generally unnecessary.
摘要:
At least one alkanolamine is prepared by reacting ammonia with alkylene oxide in a reaction space in the presence of a catalyst to give monoalkanolamine or dialkanolamine or trialkanolamine or a mixture of two or three of these compounds, the distribution of the various alkanolamines within the product spectrum being controlled by means of the temperature in the reaction space, by a process in which the temperature is established by regulating the temperature profile in the reaction space.
摘要:
A process for the preparation of triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) in the presence of a zeolite catalyst, wherein the zeolite catalyst contains one or more metals M in oxidation states II, III or IV as oxides. The desired molar ratio of SiO2 to metal oxide of the zeolite catalyst depends on the oxidation state of the metal M as specified herein. The reaction temperature is from 250 to 500° C. TEDA is an important basic chemical and is used, among other things, in the preparation of pharmaceuticals and plastics, in particular as a catalyst in the preparation of polyurethanes.
摘要:
The present invention relates to a process for preparing TEDA solutions comprising a solvent selected from the group consisting of polyhydric alcohols and ethers of polyhydric alcohols. The process comprises passing gaseous TEDA into the solvent and subsequently treating the solutions with one or more suitable adsorbents. This gives solutions which have only low color numbers and are color-stable on storage. The solutions can be used as such in preferred applications of TEDA, preferably polyurethane production.
摘要:
Preparation of alkylamines, where, in a first process stage, an olefin is reacted with ammonia, a primary amine and/or a secondary amine under hydroaminating conditions, and then, in a second process stage, the resulting hydroamination product(s) is/are reacted under transalkylating conditions.
摘要:
A process for the preparation of triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) in the presence of a zeolite catalyst, wherein the zeolite catalyst comprises one or more metals M in oxidation states II, III or IV as oxides, and for M=Al, has an SiO2/M2O3 molar ratio of greater than 1400:1, for M=metal in oxidation state II or M=two or more metals in oxidation state II, has an SiO2/MO molar ratio of greater than 100:1, for M=metal in oxidation state III or M=two or more metals in oxidation state III, has an SiO2/M2O3 molar ratio of greater than 100:1 and for M=metal in oxidation state IV or M=two or more metals in oxidation state IV, has an SiO2/MO2 molar ratio of greater than 10:1, and the reaction temperature is from 250 to 500° C.
摘要翻译:在沸石催化剂存在下,通过乙二胺(EDA)反应制备三亚乙基二胺(TEDA)的方法,其中沸石催化剂包含一种或多种氧化态为II,III或IV的氧化物的金属M,M = Al, 对于M =氧化态II的金属或M =氧化态II的两种或多种金属,SiO 2 / M 2 O 3的摩尔比大于1400:1,对于M =氧化态III或M =氧化态III中的两种或更多种金属的金属,具有大于100:1的SiO 2 / M 2 O 3摩尔比,M =氧化态IV或M =处于氧化态的二种或更多种金属IV ,SiO 2 / MO 2摩尔比大于10:1,反应温度为250-500℃。
摘要:
Preparation of ethyleneamines by reacting monoethanolamine (MEOA) with ammonia in the presence of a catalyst in a reactor (1) and separating the resulting reaction product, where ethylenediamine (EDA) obtained in the separation is reacted in a separate reactor (2) in the presence of a catalyst to give diethylenetriamine (DETA), and the resulting reaction product is passed to the separation of the reaction product resulting from reactor 1.
摘要:
Process for the preparation of ethylenamines, in particular diethylenetriamine (DETA), by continuous reaction of ethylenediamine (EDA) in the presence of a heterogeneous catalyst, where the reaction is carried out in a reaction column.
摘要:
The invention relates to a process for preparing nitrogen-containing catalysts, comprising: a) preparation of an oxidic species comprising the following components: at least one metal M selected from groups Ib to VIIb and VIII of the Periodic Table of the Elements, it being possible for the same metal to be present in different oxidation states; if appropriate one or more promoters P selected from groups Ib to VIIb and VIII of the Periodic Table of the Elements, the lanthanides, and from groups IIIa to VIa of the Periodic Table of the Elements, excluding oxygen and sulfur; if appropriate one or more elements R selected from hydrogen, alkali metals and alkaline earth metals; if appropriate one or more elements Q selected from chloride and sulfate; oxygen, the molar proportion of oxygen being determined by the valency and frequency of the elements in the oxidic species other than other oxygen; b) reaction of the oxidic species with an amine component selected from ammonia, primary and secondary amines and ammonium salts, the nitrogen-containing catalyst being formed with the formation of water, and to nitrogen-containing catalysts preparable by this process. The invention further relates to a process for aminating hydrocarbons using the inventive nitrogen-containing catalyst and to the use of an oxidic species in a process for the direct amination of hydrocarbons.
摘要:
In a process for the purification of triethylenediamine (TEDA) in which TEDA is vaporized and the gaseous TEDA is passed into a liquid solvent and is subsequently crystallized from this, the mother liquor obtained after the TEDA has been crystallized is extracted with an extractant which is immiscible or only slightly miscible with the solvent of the mother liquor and in which TEDA is readily soluble, and the TEDA-depleted mother liquor obtained after extraction and/or the TEDA-enriched extractant which has been used for the extraction are/is returned to the process.