Patent GB-711930-A (GB)
Title: Improvements in hydroforming
IPC: C10G35/14
Filed: 1952-04-22
Abstract: <PICT:0711930/IV (b)/1> In a continuous process of hydroforming hydrocarbon fractions by contacting the hydrocarbons at elevated temperature and pressure in the presence of hydrogen with a fluidized bed of catalyst containing a platinum metal, the catalyst is regenerated by withdrawing a portion to a primary regeneration zone where it is contacted with a hydrogen-containing gas, and withdrawing a further portion to a secondary regeneration zone where it is contacted with an oxygen-containing gas, the catalyst being fluidized in each regeneration zone and returned to the reaction zone.  As shown, petroleum naphtha enters at 3 and is led into a fluidized bed of catalyst A in the upper part of vessel 1 where it is hydroformed at 850-950 DEG  F. and a pressure of 150-500 lbs. per square inch; reaction products leave at 11 and pass through scrubber S and high-pressure separator 19 to fractionator 22. Catalyst flows via tube 27a into the lower part of vessel 1 where it is regenerated as a fluidized bed B with hydrogen-containing recycle gas at 900-1100 DEG F. and a pressure of 150-500 lbs. per square inch; the catalyst in bed B is heated by circulation through U-tubes T which are immersed in a bed C of refractory material (e.g. sand, rock, or granite) contained in a lower vessel 2 and fluidized by hot combustion gases from burner 27.  The catalyst is carried upwardly from bed B back to bed A.  Part of the recycle gas from separator 19 enters via pipes 9c near the bottom of the U-tubes and the remainder passes direct to the bed A via pipe 9a.  Catalyst is also withdrawn through line 36 to regenerator 48 where it is treated with flue gas containing about 5 per cent oxygen to burn off contaminating deposits at about 800 DEG F.  This regenerated catalyst is mixed with feed oil to form a slurry and returned via line 44 to the reaction zone.  When using a catalyst comprising a carrier, platinum, and hydrogen fluoride, platinic chloride may be added through pipe 44b to the slurry in pipe 44, and the catalyst leaving the regenerator 48 may be treated with hydrogen fluoride in vessel 59, or hydrogen fluoride may be added to the slurry through pipe 44a.ALSO:In a continuous process of hydroforming hydrocarbon fractions by contacting the hydrocarbons at elevated temperature and pressure in the presence of hydrogen with a fluidised bed of catalyst containing a platinum metal, the catalyst is regenerated by withdrawing a portion to a primary regeneration zone where it is contacted with a hydrogen-containing gas, and withdrawing a further portion to a secondary regeneration zone where it is contacted with an oxygen-containing gas, the catalyst being fluidised in each regeneration zone and returned to the reaction zone.  As shown, petroleum naphtha enters at 3 and is led into a fluidised bed of catalyst A in the upper part of vessel 1 where it is hydroformed at 850-950 DEG  F. and a pressure of 150-500 <PICT:0711930/III/1> lbs. per sq. in.; reaction products leave at 11 and pass through scrubber S and high pressure separator 19 to fractionator 22. Catalyst flows via tube 27a into the lower part of vessel 1 where it is regenerated as a fluidised bed B with hydrogen-containing recycle gas at 900-1100 DEG  F. and a pressure of 150-500 lbs. per sq. in.; the catalyst in bed B is heated by circulation through U-tubes T which are immersed in a bed C of refractory material (e.g. sand, rock, or granite) contained in a lower vessel 2 and fluidised by hot combustion gases from burner 27.  The catalyst is carried upwardly from bed B back to bed A.  Part of the recycle gas from separator 19 enters via pipes 9c near the bottom of the U-tubes and the remainder passes direct to the bed A via pipe 9a. Catalyst is also withdrawn through line 36 to regenerator 48 where it is treated with flue gas containing about 5 per cent. oxygen to burn off contaminating deposits at about 800 DEG  F.  This regenerated catalyst is mixed with feed oil to form a slurry and returned via line 44 to the reaction zone.  When using a catalyst comprising a carrier, platinum, and hydrogen fluoride, platinic chloride may be added through pipe 44b to the slurry in pipe 44, and the catalyst leaving the regenerator 48 may be treated with hydrogen fluoride in vessel 59, or hydrogen fluoride may be added to the slurry through pipe 44a.