Abstract:
The invention relates to a method for producing a solution of hydrocyanic acid salts, said method comprising the following steps: a) a raw gas containing hydrocyanic acid is produced by dehydrating formamide to a formamide transformation percentage of = 97; b) optionally the raw gas obtained in step a) is subjected to acid washing; c) the raw gas obtained in step a) or optionally step b) is then reacted with an aqueous solution of a hydroxide M(OH) x , where M is selected from the group of alkali metals and earth alkali metals and x represents 1 or 2 according to the oxidation number of M.
Abstract translation:本申请涉及一种用于制备包含的制造通过甲酰胺的脱水含有氰化氢的= 97%甲酰胺转化的原料气体的步骤)氰化物盐的溶液; b)任选地,步骤a)中获得的粗制气体的酸洗; c)以步骤a在步骤b所获得的),或可选地)将原料气体与氢氧化物的水溶液的随后的反应中,M(OH) X SUB>,其中M选自选自碱金属和碱土金属和 X M的氧化态和为1或依赖性的。2
Abstract:
The invention relates to a method for separating close-boiling homo and heteroazeotropic mixtures using ionic liquids. The method is superior to conventional extractive rectification in terms of cost-effectiveness and exergetic aspects as a result of the selectivity and the unusual characteristic profile of the ionic liquids.
Abstract:
THE INVENTION RELATES TO A PROCESS FOR SEPARATING CLOSE-BOILING, HOMO-AND HETEROAZEOTROPIC MIXTURES BY USING IONIC LIQUIDS. DUE TO THE SELECTIVITY AND UNUSUAL COMBINATION OF PROPERTIES OF THE IONIC LIQUIDS THE PROCESS IS SUPERIOR TO CONVENTIONAL EXTRACTIVE RECTIFICATION FROM THE POINT OF VIEW OF COSTS AND ENERGY.(FIGURE 1)
Abstract:
DONDE: a) UNA MEZCLA DE AGUA, FORMAMIDA, COMPONENTES DE ALTO PUNTO DE EBULLICION Y GASES DISUELTOS SON EXTRAIDOS POR CONDENSACION DEL PRIMER DESTILADO DE LA MEZCLA DE GAS DE PRODUCTO DESPUES DE LA DESHIDRATACION CATALITICA DE FORMAMIDA GASEOSA EN PRESENCIA DE OXIGENO, PARTE DEL AGUA Y LOS GASES DISUELTOS SON SEPARADOS DEL PRIMER DESTILADO PARA DAR UN TERCER DESTILADO QUE COMPRENDE AGUA, FORMAMIDA Y COMPONENTES DE ALTO PUNTO DE EBULLICION, Y UNA CORRIENTE DE RECICLADO CONTENIENDO FORMAMIDA ES SEPARADA DEL TERCER DESTILADO POR DESTILACION SIMPLE; Y, b) HACER RECIRCULAR LA CORRIENDE DE RECICLADO HACIA LA REACCION DE DESHIDRATACION, EN DONDE DICHA CORRIENTE CONTIENE DE 5% HASTA 50% EN PESO DE AGUA. LA DESTILACION SIMPLE SE REALIZA A UNA PRESION DE 0,0204 A 0,153 Kg/cm2 Y A UNA TEMPERATURA DE 110 A 160°C; Y LA DESHIDRATACION CATALITICA A UNA TEMPERATURA DE 400 A 600°C Y A UNA PRESION DE 0,0714 A 0,357 Kg/cm2
Abstract:
Separation of ethylenediaminetetraacetic acid (EDTA) from heavy metal ion-free waste water of pH below 2.5 is effected by adsorption with activated carbon.
Abstract:
Disclosed is a process for preparing a solution of cyanide salts, comprising the steps of: a) preparing a crude gas comprising hydrocyanic acid by dehydrating formamide up to a formamide conversion of >/= 97 per cent; b) If appropriate, acid-scrubbing the crude gas obtained in step a); and c) subsequently reacting the crude gas obtained in step a) or, if appropriate, in step b) with an aqueous solution of a hydroxide, M(OH)x, where M is selected fro the group consisting of alkali metals and alkaline earth metals and x is dependent upon the oxidation state of M and is 1 or 2.