The present disclosure generally relates to a methods and systems for conversion of chemically pretreated lignocellulosic biomass to monosaccharides by enzymatic hydrolysis at high total solids concentration to provide for increased throughput and reduced enzyme usage in commercial scale processes.

The present disclosure relates, at least in part, to compositions comprising lignocellulosic biomass and an organic solvent wherein the lignocellulosic biomass comprises 35% or greater of lignin material. The present disclosure relates, at least in part, to compositions comprising lignocellulosic biomass and an organic solvent wherein the lignocellulosic biomass comprises 50% or less of carbohydrate. In certain embodiments the present compositions may have a viscosity of 5000 cps or less.

The present disclosure relates, at least in part, to compositions comprising lignocellulosic biomass and an organic solvent wherein the lignocellulosic biomass comprises 35% or greater of lignin material. The present disclosure relates, at least in part, to compositions comprising lignocellulosic biomass and an organic solvent wherein the lignocellulosic biomass comprises 50% or less of carbohydrate. In certain embodiments the present compositions may have a viscosity of 5000 cps or less.

The present disclosure generally relates to a method for controlled pretreatment of lignocellulosic biomass. The method comprises the steps of: Pretreating (S10) a lignocellulosic biomass material in a pretreatment arrangement, the pretreating comprising impregnating (S10A) the lignocellulosic biomass with an SO2 feed in an impregnation vessel of the pretreatment arrangement; collecting (S20) a number of process parameters of the pretreatment, which process parameters include at least a feed parameter related to the total amount of lignocellulosic biomass input to the pretreatment arrangement, and a dry matter parameter related to the dry matter content of lignocellulosic biomass input to the pretreatment arrangement; and adjusting (S30) the SO2 feed in response to the process parameters.

A system for treatment of a biomass material, said system comprising: a first vessel (3) in which said biomass material is treated under a first pressure; a second vessel (5) in which said biomass material is received and held at a second pressure which is lower than the first pressure; a transporting pipe (7) connecting an outlet (9) of the first vessel (3) with an inlet (11) of the second vessel (5) for transporting the biomass material from the first vessel to the second vessel; and a valve (15; 15′; 15) arranged in said transporting pipe (7), said valve being configured for controlling the flow of biomass material and fluid in the transporting pipe (7), wherein said transporting pipe (7) is asymmetrically connected to an outlet (33′; 33) of said valve (15; 15′; 15) such that a generated jet stream of biomass material delivered out from the outlet (33′; 33) of the valve (15; 15′; 15) is received closer to a transporting pipe longitudinal central axis (A1) than if the outlet (33′; 33) of the valve (15; 15′; 15) and the transporting pipe (7) would have been connected symmetrically.

Disclosed is mechanical and decolorization pretreatment of cotton-containing textiles, such as “trash” feedstock in terms of end-of-life-cotton textiles, that may be used to produce sugar without the use of harsh pretreatments conditions.

Method for controlled delignification of lignocellulosic feedstock, said method comprising the steps of: providing a reactive phase of pH less than 1, said reactive phase comprising: water; sulfuric acid; a source of peroxide; a modifying agent, said modifying agent adapted to control the reactivity of the sulfuric acid; providing a holding phase, said holding phase comprising an organic solvent which does not react with the aqueous acidic composition; combining said reactive phase and holding phase to form a reaction mixture; exposing a lignocellulosic material to said reaction mixture for a period of time sufficient to allow delignification of the lignocellulosic material.

The present invention relates to a process for the production of treated pulp comprising the steps of: i. providing a fibre source material; ii. subjecting the fibre source material to pre-hydrolysis; iii. subjecting the pre-hydrolysed fibre source material to alkaline chemical pulping process, preferably kraft pulping, to obtain an alkaline pulp; iv. optionally adjusting the pH of the obtained pulp to above pH 9; v. subjecting the alkaline pulp to a bleaching sequence comprising contacting the pulp with ozone (Z) in alkaline conditions to obtain a treated pulp. The invention also relates to a treated pulp obtained, textile fibres produced from the treated pulp, textile products comprising the textile fibres and to the use of the treated pulp.

The invention relates to the chemical industry, namely to the production method of cellulose from all types of plant cellulose-containing raw material. The method includes raw material impregnation and hydrolysis in a hydrolysis solution, cellulose filtration, washing with water, filtration and drying, accompanied with the use of cycles that include heating of the material to a temperature of 115° C. or less, high-speed impulse action of vacuum with a pressure change in the range up to 5 mm Hg for a time of less than 10 seconds, followed by exposure under vacuum and vacuum relief.

Both solution of nitric or sulphuric acids, their mixture and alkaline solution can be used as hydrolysis solution.

Technical result of the claimed method consists in. reducing the duration of the cellulose hydrolysis process, reducing the temperature of the processes while obtaining the required chemical and structural homogeneity of the cellulose.

A selective removal of metal and its anion species that are detrimental to subsequent hydrothermal hydrocatalytic conversion from the biomass feed prior to carrying out catalytic hydrogenation/hydrogenolysis/hydrodeoxygenation of the biomass in a manner that does not reduce the effectiveness of the hydrothermal hydrocatalytic treatment while minimizing the amount of water used in the process is provided.