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| Number | Title | Issue Date |
| 8038840 | Process for refining and producing cellulose, lignin and xylose from biomass material A process for refining and producing cellulose, lignin and xylose from biomass material comprises the following steps: pulverizing and screening the biomass material; and then dipping the biomass material in organic acid with lower boiling point and decomposing it i... | 10/18/2011 |
| 7351306 | Cooking of cellulose pulp in a cooking liquor containing pre-evaporated black liquor The method is for cooking of cellulose pulp in which the raw material, preferably in the form of chips, undergoes a successive elevation of temperature towards the cooking temperature while the chips are first impregnated with an impregnation liquor followed by cook... | 04/01/2008 |
| 7270725 | Pretreatment of chips with white liquor prior to a treatment with black liquor The method is for the manufacture of cooked cellulose pulp in which the starting material, preferably chips, undergoes a successive increase in temperature towards cooking temperature. This is done while the chips are first treated in a pre-treatment zone in which t... | 09/18/2007 |
| 7198695 | Method for separating hemicelluloses from a biomass containing hemicelluloses and biomass and hemicelluloses obtained by said method The invention relates to a method for separating hemicelluloses from a biomass containing hemicelluloses. The method includes the steps of: a) extracting the hemicelluloses from the biomass containing hemicelluloses by treating them with a complex compound in an aqu... | 04/03/2007 |
| 7189306 | Process of treating lignocellulosic material to produce bio-ethanol This invention relates to a process of treating a lignocellulosic material to produce bio-ethanol. The process includes the steps of: (a) exposing the lignocellulosic material to conditions including a pH not less than about 8, and steam at a first pressure, to prod... | 03/13/2007 |
| 7117164 | System and method of demand planning for intermediate and by-products A system (100) for demand planning includes memory (116) containing a value representing a demand quantity of at least one end product that a manufacturer (102) is to produce. Production of the demand quantity of the end product includes product... | 10/03/2006 |
| 6966970 | Method for supplying washing liquid to a process for cooking cellulose pulp The invention relates to a method for supplying washing liquid to a digester (1) for cellulose pulp and a subsequent diffuser washing device (2a, 2b). A high, disturbance-free production capacity can be obtained by using a common feed pump (P... | 11/22/2005 |
| 6902649 | Enhanced fiber additive; and use The disclosure provides a process of modifying a seed based fiber (SBF) to form an enhanced fiber additive (EFA). The process includes an acid treatment step and optionally at least one fiber modification step. Preferred EFA products and uses are described. ... | 06/07/2005 |
| 6896810 | Process for producing alkaline treated cellulosic fibers Systems and methods by which to subject cellulosic fibers to alkaline treatment are provided. The systems and methods of the invention include equipment, such as nanofiltration units and slurry concentrators, which result in a lowered overall consumption of alkaline... | 05/24/2005 |
| 6419788 | Method of treating lignocellulosic biomass to produce cellulose A multi-function process is described for the separation of cellulose fibers from the other constituents of lignocellulosic biomass such as found in trees, grasses, agricultural waste, and waste paper with application in the preparation of feedstocks for ... | 07/16/2002 |
| 6409882 | Tall oil refining improvement In a tall oil refining operating plant, a warm water loop is disclosed for cooling the tall oil heads fraction extracted from the crude tall oil, rather than the conventional use of cold water. This avoids condensation and the subsequent solidification of... | 06/25/2002 |
| 6346166 | Flash tank steam economy improvement By the utilization of a jet ejector (such as a thermocompresser) in a cellulose chemical pulp mill, it is possible to effectively increase the utilization of steam. The volume of steam from a flash tank which flashes black liquor from a pulp digester may ... | 02/12/2002 |
| 6280567 | System and method for treatment of cellulose-containing material prior to pulp digestion The invention relates to a process system and a method for preliminary treatment of disintegrated cellulose-containing material, preferably wood chips, prior to pulp digestion. The process system and the method according to the invention make use of a pro... | 08/28/2001 |
| 6261411 | Process for kraft chemical recovery A method of recovering chemicals from spent black liquor used in a kraft pulping process comprising organic materials having oxygen containing functional groups, the method comprising heating the black liquor in the presence of lime at an elevated tempera... | 07/17/2001 |
| 6168642 | Industrial utilization of garbage with effective recycling and with optimization in energy production A recycling process for garbage containing a high proportion of paper where printed paper is first separated from the garbage. The garbage is then into pieces and light and heavy components are separated out in a classification tank. The remaining organic... | 01/02/2001 |
| 6136144 | Method of removing sulfur from a process gas stream using a packed bed calcinator The present invention reduces the sulfur and odor emissions from a paper-making Kraft process by recovering the sulfur in the non-combustible gases (NGCs) emitted by the Kraft process. In a first embodiment of the invention, the NGCs are flamelessly oxidi... | 10/24/2000 |
| 6123806 | Process for kraft chemical recovery A method of recovering chemicals from spent black liquor used in a kraft pulping process comprising organic materials having oxygen containing functional groups, the method comprising heating the black liquor at an elevated temperature and at a correspond... | 09/26/2000 |
| 6110323 | Methods of refining agricultural residues to absorbent cellulose, xylose, and plant nutrient liquor, and products produced by such methods A method of creating a number of separate product streams from an agricultural waste material, comprising: providing a starting material consisting of an agricultural waste material; hydrolyzing the starting material with an acid solution at atmospheric p... | 08/29/2000 |
| 5855736 | Method of reducing corrosion in a power boiler of a pulp mill Method of reducing corrosion in a power boiler of a pulp mill using biofuel and suspended matter obtained from the waste water treatment of the mill. In the method flue gases obtained from a waste heat boiler are fed into the power boiler, causing the sul... | 01/05/1999 |
| 5589030 | Method for preparing vanillin from old newsprint This invention relates generally to a method for extracting lignosulfonate for the manufacture of vanillin and other specialty chemicals. Specifically, the invention relates to a method for recovering lignosulfonates from newsprint comprising the steps of... | 12/31/1996 |
| 5338366 | Acid pre-hydrolysis reactor system Biomass, such as bagasse, is pre-hydrolyzed, to ultimately effect hydrolysis of hemicellulose to sugars. Biomass is mixed with a mineral acid solution to form a slurry having a consistency of about 8 to 12% so that the acid solution properly wets the biom... | 08/16/1994 |
| 5326433 | Multi-level sulfide content white liquor production and utilization in cellulose pulping Paper pulp (e.g. kraft pulp) is produced utilizing at least two different supplies of cooking liquor, one having low sulfide content, and the other high sulfide content. The high sulfide content supply is typically used to impregnate the pulp or otherwise... | 07/05/1994 |
| 5234546 | Polysulfide production in white liquor Off gases from black liquor heat treatment, evaporators, wood pulp digesters, etc. are treated to produce primarily hydrogen sulfide and sulfur free fuel gases such as methane, carbon monoxide, hydrogen, and ethylene. Then the hydrogen sulfide is used to ... | 08/10/1993 |
| 5164480 | Method for the manufacture of tall oils The present invention relates to the direct electrolysis of tall oil soap (TOS) to produce crude tall oil (CTO). An aqueous tall oil soap solution generated in a kraft wood-pulping process is placed in contact with an anode in an electrolytic cell, wherei... | 11/17/1992 |
| 4992105 | Method and apparatus for the hydrolytic separation of cellulose A plurality of reactors, which can all be interconnected selectively by way of pipes, are used for the hydrolytic separation of a cellulose-containing substrate so that a stepwise pressure reduction in one reactor is made possible and thus a stepwise pres... | 02/12/1991 |
| 4966650 | Method for fractionation of lignins from steam exploded lignocellulosics to provide fractions with different properties The chemical components of lignocellulosic material which have been dissociated by a steam explosion process can be extracted from the mixture of components using a solvent extraction process. The solvents are water, alcohol and a mild caustic in that ord... | 10/30/1990 |
| 4964995 | Supercritical separation process for complex organic mixtures A process is disclosed for separating low molecular weight components from complex aqueous organic mixtures. The process includes preparing a separation solution of supercritical carbon dioxide with an effective amount of an entrainer to modify the solvat... | 10/23/1990 |
| 4963227 | System and apparatus for recovery of turpentine from thermomechanical pulping process There has been provided a system and apparatus for recovering turpentine from a thermomechanical pulping process for making paper, which thermomechanical pulping process utilizes a plug screw conveyor for squeezing and feeding pulp chips. The thermomechan... | 10/16/1990 |
| 4916242 | Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural In a combined process for the thermal and chemical treatment of lignocellulose-containing biomass and for the production of furfural, biomass is supplied to a cooker in batches, is heated in the cooker under the addition of cooking liquor, and cellulose o... | 04/10/1990 |
| 4879369 | Method of removing lignin from tall oil Lignin is removed from a crude tall oil in the production of tall oil fractions suitable for use as chemical ingredients and additives in other products by sparging the crude tall oil at a temperature of between about 350° F. to 400° F. with a carrier g... | 11/07/1989 |
| 4826566 | Rapid disolution of lignin and other non-carbohydrates from ligno-cellulosic materials impregnated with a reaction product of triethyleneglycol and an organic acid A method of rapidly and efficiently treating ligno-cellulosic material for removal of lignin and other non-carbohydrates as well as non-cellulosic carbohydrates from cellulosic matter. Such material is first impregnated with a liquor which is a reaction p... | 05/02/1989 |
| 4735683 | Process for preparation of potassium salts from pulp of lignocellulosic materials Described herein is a process for producing potassium salts from potassium-based liquors for pulping of lignocellulosic material. The process comprises the steps of (a) digesting lignocellulosic material with a potassium-base aqueous cooling liquor to obt... | 04/05/1988 |
| 4708746 | Method the hydrolytic splitting of acid treated comminuted crude cellulose with steam A method for acid-catalyzed hydrolytic splitting of cellulose to give a high yield in sugar with a minimal expenditure in energy, in particular, with the smallest possible charge of live steam. Admission of steam is performed in a plurality of successive,... | 11/24/1987 |
| 4645541 | Method of producing level off DP microcrystallinecellulose and glucose from lignocellulosic material Microcrystalline cellulose has many applications in the pharmaceutical, food, paper and structural composite industries. Level off DP (Degree of Polymerization) microcrystalline cellulose is made up of a chain of about 250 glucose molecules in the form of... | 02/24/1987 |
| 4612286 | Acid hydrolysis of biomass for alcohol production A method of treating biomass having fermentable material is provided utilizing acid hydrolysis in a countercurrent diffusion treatment structure. By practicing the invention acid usage is minimized, pentose concentration in the hydrolysate solution is max... | 09/16/1986 |
| 4589924 | Process for hydrolyzing cellulose-containing material with gaseous hydrogen fluoride The semi-continuous process according to the invention for hydrolyzing cellulose-containing material (substrate) with gaseous hydrogen fluoride comprises sorption and subsequent desorption of HF in a total of n steps. The substrate is divided into n batch... | 05/20/1986 |
| 4556431 | Process for hydrolyzing cellulose-containing material with gaseous hydrogen fluoride A continuous process for hydrolyzing cellulose-containing material (substrate) with gaseous hydrogen fluoride, HF is sorbed by the substrate at a temperature above its boiling point in n sorption steps and thereafter the sorbed HF is removed from the subs... | 12/03/1985 |
| 4556432 | Process for hydrolyzing cellulose-containing material with gaseous hydrogen fluoride The continuous process for hydrolyzing cellulose-containing material (substrate) is carried out by sorption of gaseous HF in a sorption reaction (1) and subsequent desorption in n steps, which are carried out in n reactors which are separated from one ano... | 12/03/1985 |
| 4547263 | Method for obtaining useful products from green pseudostem, including papermaking pulp plantain A method and apparatus for continuously producing pulp from previously unusable agricultural fibers, such as plantain. The pulp is used in papermaking. The pulp effluent is recycled and concentrated during the process, thereby enabling economical recovery... | 10/15/1985 |
| 4470851 | High efficiency organosolv saccharification process Comminuted cellulosic materials which may or may not contain lignin are partially or totally hydrolyzed or saccharified by an improved organosolv process using an aqueous acetone solvent mixture containing a small amount of an acidic compound and containi... | 09/11/1984 |
