Patent ID: 7294225
Filing Date: 2007-11-13
Classification: C01B,D21C,Y02P

Abstract:
1. A pulp mill process for production of pulp and an automotive fuel comprising: producing pulp and a liquid stream containing spent cooking chemicals in a pulp mill; gasifying a major portion of said stream of spent cooking chemicals to produce a synthesis gas and a liquor containing a portion of the spent cooking chemicals; recycling at least a portion of the liquor to the step of producing pulp; combusting additional biomass to generate heat and electric energy for the pulp mill process; processing at least a portion of the synthesis gas to produce automotive fuel comprising at least one selected from the group consisting of methanol and dimethyl ether, wherein the energy content of said automotive fuel corresponds to at least 60% of the energy content of said biomass, and wherein the additional biomass is added in an amount sufficient to compensate for a decrease in heat and electricity generation as a consequence of the generation of the synthesis gas; and exporting the automotive fuel from the pulp mill and using the fuel as alternatives to fossil based automotive fuels.