Food or edible material: processes – compositions – and products – Products per se – or processes of preparing or treating... – Hop derived ingredient – including hopping of wort
Patent
1985-03-25
1987-03-17
Hunter, Jeanette
Food or edible material: processes, compositions, and products
Products per se, or processes of preparing or treating...
Hop derived ingredient, including hopping of wort
127 37, 435161, C12C 300, F24C 1510, C12P 706
Patent
active
046506896
ABSTRACT:
A method for producing a fermentable wort useful to produce ethanol from cellulosic materials is particularly adaptable for batch-wise processing. The broad method includes the steps of placing the materials in an airtight vessel that is evacuated to a moderate vacuum at a reduced temperature of 20.degree. C. or less. Highly concentrated mineral acid gas, such as HCl, is introduced to raise the vessel pressure to a pressure less than 1500 mm of Hg wherein the concentration of acid gas is at least 40%. These temperatures and pressures are maintained for at least 30 minutes to depolymerize the cellulose after which the vessel is again evacuated to remove the excess gas and then raised to ambient pressure so that the material is removed. The depolymerized material, which contains some adsorbed acid gas, is mechanically conveyed against a counterflow of hot water. The hot water thus dissolves a portion of the adsorbed gas to produce a weak acid solution of between 2% and 4% which hydrolyzes the depolymerized cellulose to produce the wort. The water flow also produces an enriched zone of dissolved sugars so that the wort is drawn off from the enriched zone after which it may be fermented and distilled into ethanol.
REFERENCES:
patent: 1511786 (1924-10-01), Terrisse et al.
patent: 1670727 (1928-05-01), Kocher
patent: 1963972 (1934-06-01), Dreyfus
patent: 4556432 (1985-12-01), Erckel
Hunter Jeanette
Martin Timothy J.
Urban Fuels, Inc.
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