NOVELTY - Pretreating lignocellulosic biomass, involves, in a bioreactor, contacting the lignocellulosic biomass with a stream of liquid, where (i) the liquid is water or dilute acid; (ii) the step of contacting is carried out at a temperature in a temperature range of 120-290 degrees C; and (iii) the liquid is continuously removed from the bioreactor after the step of contacting.    USE - The methods are useful for pretreating lignocellulosic biomass, making ethanol, and producing one or more 7-18C carbon-containing biofuels (all claimed).    ADVANTAGE - The method is highly improved, environment friendly, and provides high yields of desired products, e.g. fermentable sugars and lignin.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a method of making ethanol, which involves: (i) pretreating lignocellulosic biomass by, in a bioreactor, contacting the lignocellulosic biomass with a stream of liquid, where (a) the liquid is water or dilute acid; (b) the step of contacting is carried out at a temperature in a temperature range of 120-290 degrees C; and (c) the liquid is continuously removed from the bioreactor after the step of contacting; (ii) enzymatically hydrolyzing a slurry produced in the pretreating step by mixing the slurry with at least one hydrolytic enzyme; and (iii) microbially fermenting glucose produced in the steps of pretreating and enzymatically hydrolyzing, where the step of microbially fermenting produces the ethanol; and    (2) a method of producing one or more 7-18C carbon-containing biofuels, which involves: (i) pretreating lignocellulosic biomass by, in a bioreactor, contacting the lignocellulosic biomass with a stream of liquid, where (a) the liquid is water or dilute acid; (b) the step of contacting is carried out at a temperature in a temperature range of 120-290 degrees C; and (c) the liquid is continuously removed from the bioreactor after the step of contacting; (ii) recovering lignin formed by the step of pretreating; and (iii) reacting the lignin by catalytic chemical treatment in the presence of a 5% ruthenium (Ru)/carbon (C) and aluminum oxide (Al2O3) catalyst matrix, thus producing the one or more 7-18C carbon-containing biofuels.