| Patent application number | Description | Published |
|---|
| 20080203355 | Method for Producing Salts of Hydrocyanic Acid - The present application relates to a process for preparing a solution of cyanide salts, comprising the steps of:
| 08-28-2008 |
| 20090039315 | AQUEOUS SOLUTIONS CONTAINING METAL CYANIDE FOR CYANIDE LEACHING FOR THE WINNING OF GOLD AND SILVER - The present invention relates to solutions comprising water and at least one metal cyanide, at least a part of the water being obtained from wastewater which occurs as depleted wastewater in a process for extracting noble metals from noble metal-containing ores by the cyanide process, the process for the preparation of solutions according to the invention and to the use of the solutions according to the invention in a process for extracting noble metals from noble metal-containing ores by the cyanide process, to a process for extracting noble metals from noble metal-containing ores by the cyanide process, wherein the solution according to the invention is used, and to the use of depleted wastewater occurring in the extraction of noble metals from noble metal-containing ores by the cyanide process to the preparation of solutions comprising water and at least one metal cyanide. | 02-12-2009 |
| 20100021365 | METHOD FOR PRODUCING PRUSSIC ACID - Process for preparing hydrocyanic acid, which comprises catalytic dehydration of gaseous formamide to give a product mixture comprising hydrocyanic acid, water, formamide, ammonia, CO and high boilers, separation of the product mixture by condensation of a condensate comprising water, formamide, high boilers and possibly ammonia and hydrocyanic acid from the product mixture obtained and partial or total recirculation of the condensate into a heat exchanger located downstream of the reactor. | 01-28-2010 |
| 20100284889 | METHOD FOR PRODUCING HYDROCYANIC ACID BY CATALYTIC DEHYDRATION OF GASEOUS FORMAMIDE - A process for preparing hydrogen cyanide by catalytically dehydrating gaseous formamide in a tubular reactor formed from at least one reaction channel in which the catalytic dehydration proceeds, said reaction channel having an inner surface which is formed from a material having an iron content of ≧50% by weight, and no additional catalysts and/or internals being present in the reaction channel, and the at least one reaction channel having a mean hydraulic diameter of from 0.5 to 6 mm, and a reactor with the features specified above and the use of the inventive reactor for preparing hydrogen cyanide by catalytically dehydrating gaseous formamide. | 11-11-2010 |
| 20100316552 | PROCESS FOR PREPARING HYDROGEN CYANIDE BY CATALYTIC DEHYDRATION OF GASEOUS FORMAMIDE - A process for preparing hydrogen cyanide, comprising the provision of gaseous formamide by evaporating liquid formamide in an evaporator (step i)) and the catalytic dehydration of the gaseous formamide (step ii)), and also an apparatus for performing the process according to the invention, comprising at least one microevaporator and a tubular reactor, and the use of a microevaporator for evaporating formamide in a process for preparing hydrogen cyanide from formamide. | 12-16-2010 |
| 20110033363 | PROCESS FOR PREPARING HYDROCYANIC ACID BY CATALYTIC DEHYDRATION OF GASEOUS FORMAMIDE - DIRECT HEATING - Process for preparing hydrocyanic acid by catalytic dehydration of gaseous formamide, wherein the dehydration of formamide is coupled with an exothermic reaction by the reactor used in the dehydration comprising two separate fluid paths which are separated by a common reactor wall, with one fluid path being provided for the dehydration of formamide and the second fluid path being provided for the exothermic reaction. | 02-10-2011 |
| 20110207634 | PREPARING ETHER CARBOXYLATES - The present invention relates to a process for preparing ether carboxylates. | 08-25-2011 |
| 20110207651 | PREPARING ETHER CARBOXYLATES - The present invention relates to a process for preparing ether carboxylates. | 08-25-2011 |
