1-Propanol → Methane

The run was made without interruption for ten weeks, and time intervals during steady state operation were selected for analysis, generally of 8 to 24 hour duration. The product composition data generated during steady state operation was averaged to give the average production rates (g/hr) of THF (tetrahydrofuran), BDO (1,4-butanediol), GBL (gamma butyrolactone), PrOH (n-propyl alcohol), BuOH (n-butyl alcohol), and alkanes (primarily butane and methane). The product composition was measured by condensing a portion of the volatilized products and water in the exit gas stream and collecting the liquid product. The volume of the liquid product collected each hour was measured, and its composition analyzed using a calibrated gas chromatograph (GC) equipped with a flame ionization detector. The remaining uncondensed products (THF and alkanes) still in the exit gas stream were analyzed by measuring the gas flow rate, then analyzing the composition of the gas stream every two hours using GC procedures similar to those used for liquid analysis. The reactor contents were sampled every four hours and analyzed by GC and titration. Titration with sodium hydroxide was used to monitor the acid concentration in the reactor and the results are reported as % by weight of succinic acid. The GC analysis was carried out using a Supelcowax 10 capillary column (30 m×0.052 mm) which was maintained at 75° C. for 5 minutes after injection on and then heated at 10° C. per minute to a final temperature of 200° C. The combination of these three analyses permits calculation of the catalyst performance in terms of space time yield (STY) (calculated as g THF/Kg catalyst-hr), product selectivity, and the mass balance for each run.

1. waitThe run was made without interruption for ten weeks

ORD record

ord-9e2fdc98b66c49fc89574dbfbdba1237

Source dataset

uspto-grants-2001_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06225477B1