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| Number | Title | Issue Date |
| 6664002 | Organic expander for lead-acid storage batteries An organic expander composition for improving the cycle life and the cold crank ability properties of lead-acid batteries as compared to standard or oxylignin organic expanders. The organic expander composition is obtained by a blend of oxylignin and kraf... | 12/16/2003 |
| 6632912 | Process for preparing a black liquor-phenol formaldehyde thermoset resin Disclosed is a process for preparing phenol-formaldehyde thermoset resin that can contain up to 80% by weight a black liquor, preferably a sodium carbonate black liquor. Black liquor are by-products extracted from pulping process, which normally contain l... | 10/14/2003 |
| 6558461 | Set retarders for foamed cements An improved non-dispersing set retarder additive for foamed cements, cement compositions containing the additive, and methods of cementing in a subterranean zone penetrated by a well bore are provided. The set retarder additive includes a blend of a sulfo... | 05/06/2003 |
| 6346347 | Organic expander for lead-acid storage batteries An organic expander composition for improving the cycle life and the cold crank ability properties of lead-acid batteries as compared to standard or oxylignin organic expanders. The organic expander composition is obtained by a blend of oxylignin and kraf... | 02/12/2002 |
| 6291558 | Composition board binding material This invention features a graft copolymer of lignosulfonates reacted with an unsaturated carbonyl compound and an aldehyde, in two separate reaction steps. The resin can be used as a substitute for a majority of pure urea formaldehyde resin in the manufac... | 09/18/2001 |
| 5925743 | Polymerized alkaline lignin materials A method for preparing a polymerized alkali lignin material which comprises reacting an alkaline solution of alkali lignin obtained from an alkaline pulping process at a temperature between about 20° C. to 90° C. with between 5% to 80% by weight based o... | 07/20/1999 |
| 5756098 | Methods for the extraction of phytochemicals from fibrous plants in the absence of solvent Methods and apparatus are provided for the recovery of organic compounds from fibrous plant materials. Organic compounds which can be recovered from the fibrous plant materials include plant metabolites, such as arabinogalactan and phenols, which can be i... | 05/26/1998 |
| 5608040 | Process for the production of lignin-containing polymers Polymers containing lignin and organic compounds are produced by polymerizing the lignin with organic compounds containing at least 3 carbon atoms as well as oxygen, nitrogen and/or multiple-linkage functions in the presence of radically oxidizing enzymes... | 03/04/1997 |
| 5554596 | Virus inhibiting composition A composite molecular active substance group for use in restitutive chemotherapy against viral infections, which is produced by the process comprising: (a) preparing lignin units by carrying out an extraction in an aqueous media under weakly acidic or alk... | 09/10/1996 |
| 5446133 | Nitric acid oxidized lignosulfonates A process for producing an oxidized lignosulfonate composition comprising admixing a lignosulfonate and nitric acid such that the amount of acid comprises from about 35% to about 100% by weight of dry solids of the lignosulfonate, and reacting said mixtur... | 08/29/1995 |
| 5288857 | Lignin preparation and method for its manufacture The invention relates to a lignin preparation prepared from black liquor derived from an alkali delignification process, such as the sulphate process, soda process or polysulphide process. The lignin preparation comprises mainly lignin and at least the ma... | 02/22/1994 |
| 5281434 | Composition and process of making an animal feed binder composed of ozonated lignosulfonate A low inclusion animal feed binder composed of ozonated lignosulfonate. The ozonated lignosulfonate is a reaction product of lignosulfonate and ozone prepared by treating lignosulfonate with 2-20% ozone by weight of lignosulfonate solids at an initial pH ... | 01/25/1994 |
| 5202403 | Lignin modified phenol-formaldehyde resins A modified resole resin and an adhesive composition containing the resin wherein the resin is prepared by first reacting formaldehyde and a phenol at a mole ratio of formaldehyde to phenol of less than about 1.0 in the presence of alkaline in an amount su... | 04/13/1993 |
| 5177169 | Method for recovering and using lignin in adhesive resins Lignin, or a lignin derived material, which has been significantly demethylated (e.g., the demethylated lignin found in the raffinate produced as a by-product of dimethyl sulfide production which can be carried out using the spent liquor from wood pulping... | 01/05/1993 |
| 5169931 | Nitrite-oxidized lignosulfonates and method of making the same and use of these as dispersants A nitrite-oxidized base lignosulfonate and a method of making the same; the method comprises providing a base lignosulfonate material and oxidizing it in the presence of sodium nitrite under alkaline conditions at a temperature greater than about 100° C.... | 12/08/1992 |
| 5049661 | Sulfonation of lignins A sulfonated lignin composition suitable for use as an additive in other chemical compositions and processes having improved solubility in aqueous medium at varying pH levels, and a method of producing such sulfonated water-soluble lignin products by reac... | 09/17/1991 |
| 5043432 | Sulfonation of lignins A sulfonated lignin composition suitable for use as an additive in other chemical compositions and processes having improved solubility in aqueous medium at varying pH levels, and a method of producing such sulfonated water-soluble lignin products by reac... | 08/27/1991 |
| 5043434 | Oleum sulfonation of lignins A sulfonated lignin composition suitable for use as an additive in other chemical compositions and processes having essentially complete water solubility in aqueous medium at all pH levels, and a method of producing such sulfonated water-soluble lignin pr... | 08/27/1991 |
| 5043433 | Oleum sulfonation of lignins A sulfonated lignin composition suitable for use as an additive in other chemical compositions and processes having essentially complete water solubility in aqueous medium at all pH levels, and a method of producing such sulfonated water-soluble lignin pr... | 08/27/1991 |
| 5026808 | Method for recovering and using lignin in adhesive resins by extracting demethylated lignin Lignin, or a lignin derived material, which has been significantly demethylated (e.g., the demethylated lignin found in the raffinate produced as a by-product of dimethyl sulfide production which can be carried out using the spent liquor from wood pulping... | 06/25/1991 |
| 5021531 | Method for recovering and using lignin in adhesive resins by extracting demethylated lignin Lignin, or a lignin derived material, which has been significantly demethylated (e.g., the demethylated lignin found in the raffinate produced as a by-product of dimethyl sulfide production which can be carried out using the spent liquor from wood pulping... | 06/04/1991 |
| 5013825 | Sulfation of lignin A method of producing a sulfated lignin comprising the steps of dissolving lignin in an aqueous alkaline solution, adding an organic amine-sulfur trioxide complex to the dissolved lignin, and reacting the amine-sulfur trioxide complex with the lignin unde... | 05/07/1991 |
| 5012870 | Aminated sulfonated or sulformethylated lignins as cement fluid loss control additives A hydraulic cement slurry is disclosed which has low fluid loss properties. In addition to water and hydraulic cement, the hydraulic cement slurry contains a fluid loss control additive comprising a sulfonated or sulfomethylated kraft lignin that has been... | 05/07/1991 |
| 5010156 | Organosolv lignin-modified phenolic resins and method for their preparation A lignin-modified phenol-formaldehyde resin for use as an adhesive for particulate wood products is disclosed which is prepared by reacting phenol and formaldehyde with an aqueous alkaline solution of an organosolv lignin. The organosolv lignin used in th... | 04/23/1991 |
| 5008378 | Submicron lignin dispersions A lignin dispersion of submicron particles with film forming, binding, and adhesive properties in which the median particle diameter of the lignin in dispersion preferably is less than about 300 angstroms. The aqueous dispersion is formed by reacting abou... | 04/16/1991 |
| 4925923 | Lignin having chemically bound sulfur and phosphorus groups mainly as thiophosphate, using phosphorus pentasulfide A product comprising, a water insoluble lignin material, at neutral or acid pH, having chemically bound a sulfur(S) content from at least 9.5%, and a phosphorus(P) content from 3.3 to 10%. At least 50% by weight of the S and P content is thiophosphate. In... | 05/15/1990 |
| 4892588 | Production of lignosulfonate additives A method of producing a lignin dispersant composition comprising the steps of methylolating a lignin compound by reaction of less than about 2 moles formuladehyde per 1,000 grams of the lignin, and sulfonating the methylolated lignin by reaction from abou... | 01/09/1990 |
| 4892587 | Lignosulfonate additive-containing carbon black compositions A carbon black composition comprising carbon black and a lignin dispersant prepared by the steps of methylolating a lignin compound by reaction of less than about 2 moles formaldehyde per 1,000 grams of the lignin, and sulfonating the methylolated lignin ... | 01/09/1990 |
| 4857638 | Lignin having nitrogen and sulfur and process therefor employing thiourea A product comprising lignin material having a N-content of at least 1.86% and a sulfur content of at least 3.1%, an IR in the vicinity of 1550 to 1670 cm-1 having a peak width of at least 60 cm-1. The product is also directed to such... | 08/15/1989 |
| 4786720 | Sulfomethylated lignin amines Surface active agents are prepared from by-products of papermaking. Lignin, modified lignin, resin acid, and tall oil fatty acid are reacted with a polyamine to produce an amine condensate, and this amine condensate is reacted with a bisulfite and formald... | 11/22/1988 |
| 4775744 | Cationic and anionic lignin amines Lignin amines are disclosed which are characterized by high nitrogen content and are water soluble at both alkaline and acidic pH values. The lignin amines have utility as flocculants, filtration aids, precipitants, scale inhibitors, asphalt emulsifiers, ... | 10/04/1988 |
| 4769434 | Lignin derivative polymers A polymer material of the product of reaction of a grass plant lignin derivative comprising lignin polymer fragments recovered from black liquor obtained in the pulping of grass plant material and containing an average of more than 0.4 sites per phenyl pr... | 09/06/1988 |
| 4764597 | Method for methylolation of lignin materials An improved method of producing methylolated lignins from the black liquor residue of a kraft wood-pulping process, which methylolated lignins may be further employed in other chemical reactions, such as in the production of sulfomethylated lignin salts s... | 08/16/1988 |
| 4748235 | Method of producing improved amine salts of lignosulfonates A method of producing an amine-containing salt of a sulfonated lignin compound which may be effectively spray-dried for use in dry form comprising the steps of methylolating a lignin at an alkaline pH, lowering the pH of the methylolated lignin to precipi... | 05/31/1988 |
| 4732572 | Amine salts of sulfomethylated lignin Disclosed is a method for the production of a sulfomethylated lignin amine salt from the lignin by-product of the black liquor residue of a kraft pulping process and the use of lignin amine salts as additives in other chemical compositions. The lignin ami... | 03/22/1988 |
| 4728728 | Sulfonated ligno-aminodicarboxylates and process for making same Disclosed herein are sulfonated ligno-aminodicarboxylic acid and the salts thereof of the formula ##STR1## wherein X is an alkali cation, such as sodium, potassium, lithium, and ammonium, and Lignin denotes the polymeric sulfonated lignin material ... | 03/01/1988 |
| 4721778 | Ammonium lignosulfonates A method of producing ammonium salts of sulfomethylated lignins suited for use as dyestuff and coal-water slurry additives comprisng of the steps of ionizing the phenol component of a lignin material by-product of the black liquor of a kraft paper-making ... | 01/26/1988 |
| 4670482 | Ammonium lignosulfonates A method of producing ammonium salts of sulfomethylated lignins suited for use as dyestuff and coal-water slurry additives comprising of the steps of ionizing the phenol component of a lignin material by-product of the black liquor of a kraft paper-making... | 06/02/1987 |
| 4642336 | Ammonium lignosulfonates A method of producing ammonium salts of sulfomethylated lignins suited for use as dyestuff and coal-water slurry additives comprising of the steps of ionizing the phenol component of a lignin material by-product of the black liquor of a kraft paper-making... | 02/10/1987 |
| 4636224 | Ammonium lignosulfonates A method of producing ammonium salts of sulfomethylated lignins suited for use as dyestuff and coal-water slurry additives comprising of the steps of ionizing the phenol component of a lignin material by-product of the black liquor of a kraft paper-making... | 01/13/1987 |
