Process and method for the producton of dimethylether (DME)
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United States of America Patent
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Oct 1, 2013
Grant Date -
Jan 31, 2013
app pub date -
Jul 26, 2011
filing date -
Jul 26, 2011
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Abstract
Disclosed herein is a process for the production of fuel grade DME from carbonaceous fuels, including a pressurized multi-stage progressively expanding fluidized bed gasifier and an oxyblown autothermal reformer to produce a synthesis gas (syngas) with desirable hydrogen to carbon monoxide molar ratio, which then undergoes gas-phase DME one-step direct synthesis in a fluid pluralized bed reactor over an attrition resistant bifunctional catalyst. The crude DME thus obtained is purified in a two column distillation unit to produce a fuel grade DME having a purity greater than 99.98 mole %.
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