Patent GB-422273-A (GB)
Title: Improvements in or relating to lining apparatus for the thermal treatment of carbonaceous materials
IPC: B01J19/02
Filed: 1933-07-07
Abstract: In processes for the thermal treatment of hydrocarbons, e.g the cracking or destructive hydrogenation of carbonaceous materials, the aromatization of oils, and the polymerization of unsaturated hydrocarbons, i.e. ethylene and acetylene, the formation of carbon on the walls of the heating apparatus is suppressed by providing the walls with a metallic lining formed by decomposing within the apparatus a volatile compound of the metal. A tube coated with molybdenum is obtained by passing carbon monoxide containing a little molybdenum carbonyl for three hours through a V2A steel tube heated to 400 DEG  C.  Ethylene is then led through the tube heated to 780 DEG  C. and a condensate is obtained consisting mainly of benzene.  A chromium coated tube is similarly obtained by passing hydrogen containing chromyl chloride through the heated tube and an iron coated tube may be obtained by the decomposition of ironcarbonyl.  A Columbia oil distillate boiling between 150--300 DEG  C. is cracked by allowing it to drop through a V2A tube of 15mm. diameter lined similarly with molybdenum.ALSO:In processes for the thermal treatment of hydrocarbons, e.g the cracking or destructive hydrogenation of carbonaceous material, the aromatization of oils, and the polymerization of unsaturated hydrocarbons, i.e. ethylene and acetylene, the formation of carbon on the walls of the heating apparatus is suppressed by providing the walls with a metallic lining formed by decomposing within the apparatus a volatile compound of the metal. A tube coated with molybdenum is obtained by passing carbon monoxide containing a little molybdenum carbonyl for three hours through a V2A steel tube heated to 400 DEG  C.  Ethylene is then led through the tube heated to 780 DEG  C., and a condensate is obtained consisting mainly of benzene.  A chromium coated tube is similarly obtained by passing hydrogen containing chromyl chloride through the heated tube and an iron coated tube may be obtained by the decomposition of ironcarbonyl.  A Columbia oil distillate boiling between 150--300 DEG  C., is cracked by allowing it to drop through a V2A tube of 15 mm. diameter lined similarly with molybdenum.ALSO:In processes for the thermal treatment of hydrocarbons, e.g the cracking or destructive hydrogenation of carbonaceous materials, the aromatisation of oils, and the polymerisation of unsaturated hydrocarbons, i.e. ethylene and acetylene, the formation of carbon on the walls of the heating apparatus is suppressed by providing the walls with a metallic lining formed by decomposing within the apparatus a volatile compound of the metal. A tube coated with molybdenum is obtained by passing carbon monoxide containing a little molybdenum carbonyl for three hours through a V2A steel tube heated to 400 DEG  C.  Ethylene is then led through the tube heated to 780 DEG  C., and a condensate is obtained consisting mainly of benzene. A chromium coated tube is similarly obtained by passing hydrogen containing chromyl chloride through the heated tube and an iron coated tube may be obtained by the decomposition of iron carbonyl.  A Columbia oil distillate boiling between 150-300 DEG  C., is cracked by allowing it to drop through a V2A tube of 15 mm. diameter lined similarly with molybdenum.