Celtic Renewables Limited

Kenneth Alexander Leiper

Martin Tangney

Jane Samantha White

Sandra Messenger

Samantha Jane White

A process for the manufacture of butanol, acetone and/or other renewable chemicals is provided wherein the process utilises one or more of the group comprising by-products of the manufacture of malt whisky, such as draff, pot ale and/or spent lees, biomass substrates, such as paper, sludge from paper manufacture and spent grains from distillers and brewers, and diluents, such as water and spent liquid from other fermentations. The process comprises treating a substrate to hydrolyse it and fermenting the treated substrate at an initial pH in the range of 5.0 to 6.0. Also provided is a biofuel comprising butanol manufactured according to the process of the invention.

Process for the manufacture of butanol or acetone

A process for the manufacture of butanol, acetone and other renewable chemicals utilizes one or more of by-products of the manufacture of malt whisky, such as pot ale and spent lees, biomass substrates, such as paper, sludge from paper manufacture and spent grains from distillers and brewers, and diluents, such as water and spent liquid from other fermentations. The process includes treating a substrate to hydrolyze it and fermenting the treated. Also provided is a biofuel including butanol manufactured according to the process.

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Edinburgh, United Kingdom

Kenneth Alexander Leiper