Abstract:
Disclosed is a method for the direct amination of hydrocarbons into amino hydrocarbons by reacting a feedstock stream E containing at least one hydrocarbon and at least one amination reagent so as to obtain a reaction mixture R containing amino hydrocarbon and hydrogen in a reaction zone RZ, and electrochemically separating at least some of the hydrogen produced during the reaction from the reaction mixture R by means of a gas-tight membrane-electrode assembly comprising at least one membrane selectively conducting protons and at least one electrode catalyst on each side of the membrane, wherein at least some of the hydrogen is oxidized to protons on the anode catalyst on the retentate side of the membrane, and after penetrating the membrane, some of the protons on the permeate side are b1) reduced to hydrogen on the cathode catalyst by applying a voltage, and some of the protons b2) are reacted with oxygen on the cathode catalyst to obtain water, thereby generating electricity, the oxygen being fed from an oxygen-containing stream O that is brought in contact with the permeate side of the membrane.
Abstract:
The invention relates to a method for production of biaryl alcohols, carried out by anodic dehydrodimerisation of substituted aryl alcohols in the presence of partly- and/or per-fluorinated mediators and an electrolyte salt on a graphite electrode.
Abstract:
Disclosed is a method for the direct amination of hydrocarbons into amino hydrocarbons by reacting a feedstock stream E containing at least one hydrocarbon and at least one amination reagent so as to obtain a reaction mixture R containing amino hydrocarbons and hydrogen in a reaction zone RZ, and electrochemically separating at least some of the hydrogen produced during the reaction from the reaction mixture R by means of a gas-tight membrane-electrode assembly comprising at least one membrane selectively conducting protons and at least one electrode catalyst on each side of the membrane, wherein at least some of the hydrogen is oxidized to protons on the anode catalyst on the retentate side of the membrane, and the protons are reduced to hydrogen on the cathode catalyst on the permeate side after penetrating the membrane.
Abstract:
Disclosed is a method for the direct amination of hydrocarbons into amino hydrocarbons by reacting a feedstock stream E containing at least one hydrocarbon and at least one amination reagent so as to obtain a reaction mixture R containing amino hydrocarbon and hydrogen in a reaction zone RZ, and electrochemically separating at least some of the hydrogen produced during the reaction from the reaction mixture R by means of a gas-tight membrane-electrode assembly comprising at least one membrane selectively conducting protons and at least one electrode catalyst on each side of the membrane, wherein at least some of the hydrogen is oxidized to protons on the anode catalyst on the retentate side of the membrane, and the protons are reacted with oxygen on the cathode catalyst on the permeate side after penetrating the membrane so as to obtain water, the oxygen being fed from an oxygen-containing stream O that is brought in contact with the permeate side of the membrane.
Abstract:
The invention relates to a method for the direct amination of hydrocarbons to form amino hydrocarbons, comprising the following steps: conversion of an educt flow E containing at least one hydrocarbon and at least one amination reagent into a reaction mixture R containing amino hydrocarbons and hydrogen, and b) electrochemical separation of at least part of the hydrogen created during the conversion, from the reaction mixture R, by means of a gas-tight membrane electrode assembly comprising at least one selectively proton-conducting membrane and at least one electrode catalyst on each side of the membrane. On the retenate side of the membrane, at least part of the hydrogen is oxidised on the anode catalyst to form protons and, after passing through the membrane, on the permeate side, on the cathode catalyst, the protons are b1) reduced to hydrogen and/or b2) converted to water with oxygen, the oxygen originating from a flow O containing oxygen, brought into contact with the permeate side of the membrane.
Abstract:
The present invention relates to a process for the electrochemical purification of aluminium, which comprises the steps (a) provision of an electrolysis apparatus having at least one anode and at least one cathode in an electrolysis space, where the at least one anode and the at least one cathode are connected by an electrolyte and the electrolyte is present in the form of an electrolyte stream; (b) oxidation at the at least one anode which contains aluminium and at least one of the additional metals antimony, lead, iron, bismuth, tin, zinc or copper, where aluminium and the at least one additional metal go at least partly into the electrolyte in the form of their ions; (c) discharge of part of the electrolyte stream from the electrolysis space, where the substream contains at least part of the ions of aluminium and of the at least one additional metal ion; (d) removal of at least part of the at least one additional metal ion from the substream; (e) introduction of the substream which has been depleted in additional metal ions in step (d) into the electrolysis space and (f) deposition of the aluminium from the substream fed in in step (e) on the at least one cathode, where the electric current density at the at least one cathode is at least 50 A/m2.
Abstract translation:本发明涉及一种用于铝的电化学清洗力,包括以下步骤:(a)提供具有至少一个阳极和在电解室中,其中所述至少一个阳极和至少一个阴极通过电解质连接的至少一个阴极,和电解质的电解装置 是在电解质流的形式; (B)在含有铝的至少一个阳极和外来金属锑,铅,铁,铋,锡,锌或铜,铝和过渡至少一种异质金属至少部分地进入在它们的离子形式的电解质中的至少一种氧化; (C)排出从电解室中的电解质流的一部分,含有至少部分的铝离子和至少一种异质金属离子的部分流; (D)在部分流的至少一个外来金属离子的耗尽; (E)在步骤(d)馈送到Fremdmetallion耗尽的电流部分,以电解腔和(f)从在步骤(e)中铝的分离提供的至少一个阴极的部分流,所述至少一个阴极的电流密度至少 50 A /平方米施加。
Abstract:
Dispositivo para almacenar energía eléctrica mediante las sustancias A y S, que forman un par redox y se presentan separadas una de la otra, en donde a) el dispositivo contiene las sustancias A y S, en donde la sustancia A es un metal alcalino y la sustancia S es azufre, b) las sustancias A y S están contenidas separadas entre sí respectivamente en unos depósitos BA y BS, que están dispuestos uno sobre el otro, c) en donde los depósitos BA y BS están conectados mediante un electrolito sólido E, que es permeable a los cationes, d) en donde los depósitos BA y BS están contenidos en un depósito exterior, en donde el metal alcalino se presenta como baño de fundición y se mantiene en el interior de al menos un tubo cerámico, cerrado por abajo y formado por el electrolito E, y el interior de cada tubo cerámico se comunica respectivamente a través de un tubo elevador de sustancia con el contenido situado por encima del depósito de metal alcalino, caracterizado porque el dispositivo contiene al menos dos depósitos exteriores que contienen los depósitos BA y BS conectados mediante un electrolito sólido E, y porque el tubo de salida penetra desde arriba en el metal alcalino en el depósito BA.
Abstract:
La invención se refiere a un método para la obtención de vainillina a partir de una composición básica acuosa que contiene vainillina, en particular a partir de una composición producida en la oxidación, en forma especial en la oxidación por medio de electrólisis, de composiciones alcalinas acuosas que contienen lignina, que comprende por lo menos un tratamiento de una composición básica acuosa que contiene vainillina, en particular el tratamiento de una composición producida en la oxidación, en forma especial en la oxidación por medio de electrólisis, de composiciones alcalinas acuosas que contienen lignina, con un adsorbente básico, en particular un intercambiador de aniones.
Abstract:
La invención se refiere a un método para la producción de vainillina, dicho método comprende la electrólisis de una suspensión o solución alcalina acuosa que contiene lignina. Como material de ánodo se utiliza una aleación base, dicha aleación se selecciona de aleaciones a base de Co, Fe, Cu y Ni.