FIELD: chemistry.
SUBSTANCE: invention can be used in chemical and metallurgical industry. The method of producing hydrogen cyanide involves preparing gaseous formamide by evaporating liquid formamide in an avaporator. The dwell time of formamide in the evaporator is less than 20 s. The evaporator used is a micro-evaporator which is in form of multiple parallel microstructured sheets of evaporation and heating channels arranged alternately one above the other. Each sheet is a flat structural unit and has a large number of parallel channels having hydraulic diameter of 5-4000 mcm and form a flow path from one side of the sheet to the other. The obtained gaseous formamide is subjected to catalytic dehydration to obtain hydrogen cyanide.
EFFECT: invention enables to obtain hydrogen cyanide with high degree of selectivity, as well as at pressure close to or higher than atmospheric pressure.
12 cl, 2 dwg, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| IMPROVED METHOD OF PRODUCING HYDROCYANIC ACID BY CATALYTIC DEHYDRATION OF GASEOUS FORMAMIDE | 2008 |
|
RU2498940C2 |
| IMPROVED METHOD OF PRODUCING HYDROGEN CYANIDE BY CATALYTIC DEHYDRATION OF GASEOUS FORMAMIDE WITH DIRECT HEATING | 2009 |
|
RU2510364C2 |
| SINGLE-CHAMBER EVAPORATOR AND ITS APPLICATION IN CHEMICAL SYNTHESIS | 2011 |
|
RU2567619C2 |
| METHOD OF PRODUCING HYDROCYANIC ACID SALTS | 2006 |
|
RU2384526C2 |
| METHOD OF PRODUCING (CYCLO)ALIPHATIC AND AROMATIC DIISOCYANATES VIA PHOSGENATION OF (CYCLO)ALIPHATIC AND AROMATIC DIAMINES IN GAS PHASE | 2006 |
|
RU2440333C2 |
| METHOD OF PRODUCING METHACRYLIC ACID | 2012 |
|
RU2602080C2 |
| METHOD FOR SYNTHESIS OF ALKYL(METH)ACRYLATES | 2006 |
|
RU2409552C2 |
| METHOD OR PRODUCING ISOCYANATES | 2007 |
|
RU2460722C2 |
| METHOD OF OBTAINING META-TOLUELENE DIISOCYANATE (ITS VERSIONS) | 2009 |
|
RU2526621C2 |
| METHOD OF PRODUCING POLYMETHYLOLS | 2009 |
|
RU2531613C2 |
