摘要:
The present invention relates to processes for producing ethanol using a stacked bed reactor comprising a first bed comprising a first hydrogenation catalyst and a second bed comprising a second hydrogenation catalyst and one or more diluents. The diluents may be selected from the group consisting of silica, silica-alumina and mixtures thereof.
摘要:
A process for producing ethanol is disclosed, comprising the steps of hydrogenating acetic acid in a reactor in the presence of a catalyst to form a crude ethanol product, separating at least a portion of the crude ethanol product in a column into a first distillate comprising ethanol and a first residue comprising acetic acid and water, wherein a substantial portion of the water in the crude ethanol product that is fed to the column is removed in the first residue, and separating a portion of the ethanol mixture stream to the second distillation column to yield an ethanol product sidedraw, second residue comprising water and a second distillate comprising ethyl acetate. The water content of the ethanol product sidedraw may be further reduced to yield a stream having reduced water content.
摘要:
The present invention relates to a catalyst comprising platinum, tin and a secondary noble metal selected from the group consisting of rhodium, palladium, gold and iridium. The catalyst may be on a support. In some embodiments, the support may comprise calcium. The catalyst is used for converting acetic acid to ethanol.
摘要:
In one embodiment, the invention is to a catalyst composition comprising titanium, phosphorus, and less than 1 wt. % vanadium. The catalyst composition has a molar ratio of phosphorus to titanium of at least 1.0:1.0.
摘要:
Catalysts and processes for forming catalysts for use in hydrogenating acetic acid to form ethanol. The catalyst comprises palladium and chromium on a support.
摘要:
Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. Separation and purification processes of the crude ethanol products are employed to allow recovery of ethanol and remove acetal impurities.
摘要:
In one embodiment, the invention is to a catalyst composition comprising vanadium, titanium; and at least one oxide additive. The at least one oxide additive is present in an amount of at least 0.1 wt % based on the total weight of the catalyst composition. The molar ratio of titanium to metal additive in an active phase of the catalyst composition is at least 0.05:1.
摘要:
The present invention produces ethanol in a reactor that comprises a catalyst comprising from 40 to 70 wt. % copper and 15 to 40 wt. % zinc and a support material. The crude ethanol product may be separated and ethanol recovered.
摘要:
Ethanol production process for recovering ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. Ethanol recovery is improved by esterifying a vapor crude ethanol product to reduce unreacted acetic acid concentration.
摘要:
A process for selective formation of ethanol from acetic acid includes contacting a feed stream containing acetic acid and hydrogen at an elevated temperature with catalyst comprising platinum and tin on a high surface area silica promoted with calcium metasilicate. Selectivities to ethanol of over 85% are achieved at 280° C. with catalyst life in the hundreds of hours.