| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 162072000 |
Organic
| 61 |
| 162078000 |
Per-compound (e.g., peroxide, perborate)
| 12 |
| 162090000 |
Alkali metal, ammonium, alkaline earth metal or magnesium hydroxide or carbonate
| 6 |
| 162087000 |
Chlorine containing | 5 |
| 20090101296 | Near Neutral Chlorine Dioxide Bleaching of Pulp - Final chlorine dioxide bleaching of lignocellulosic materials is most effective at a near-neutral pH but present industrial practice typically targets a final pH of between 3.5 and 4.0 because of the difficulty in achieving and maintaining near-neutral pH cost effectively. The in situ formation of bicarbonate before the addition of chlorine dioxide provides a way of maintaining the required near-neutral pH. Near-neutral final chlorine dioxide bleaching also produces a bleached pulp that is in a state that responds more effectively to fluorescent whitening or optical brightening agents. | 04-23-2009 |
| 20110042022 | Process of chlorine dioxide bleaching of chemical pulps using magnesium hydroxide or magnesium oxide - The present invention provides an improved process for chlorine dioxide bleaching of chemical pulps in an aqueous suspension, which uses magnesium hydroxide or magnesium oxide. The process involves the addition of magnesium hydroxide or magnesium oxide to the pulp, in addition to chlorine dioxide, maintaining the mixture at a pH between about 2.5 to 7.5 for about 1 or more hours, most suitably between about 1-4 hours. This process can be used in the D | 02-24-2011 |
| 20130269891 | PROCESS FOR IMPROVING CHLORINE DIOXIDE BLEACHING OF PULP - The invention is directed to a method for increasing brightness of pulp, wherein the method includes: contacting a pulp slurry with chlorine dioxide in a final D (ClO | 10-17-2013 |
| 20100263816 | USE OF CHEMICAL PULP MILL STEAM STRIPPER OFF GASES CONDENSATE AS REDUCING AGENT IN CHLORINE DIOXIDE PRODUCTION - Steam stripper off gas from chemical pulp mills, for example kraft or sulphite pulp mills is rich in methanol and totally reduced sulphur (TRS) compounds. This gaseous stream is usually burned to avoid further handling of this TRS-rich, odorous stream. We found that once this gaseous stream is condensed, it can be used as a reducing agent in the chlorine dioxide generator, in place of purchased methanol. Surprisingly, we found that, in addition to the methanol component, the TRS components act as reducing agents during the production of chlorine dioxide or, at the very least, do not consume chlorine dioxide. The use of this stream in the ClO | 10-21-2010 |
| 20140318725 | LOW VISCOSITY KRAFT FIBER HAVING REDUCED YELLOWING PROPERTIES AND METHODS OF MAKING AND USING THE SAME - A bleached softwood kraft pulp fiber with high alpha cellulose content and increased brightness and whiteness is provided. Methods for making the kraft fiber and products made from it are also described. | 10-30-2014 |
| 162082000 |
Sulfur containing | 4 |
| 20100269994 | METHOD FOR TREATING LIGNO-CELLULOSIC MATERIALS - The present invention relates to a method for treating pectin-containing ligno-cellulosic raw materials in a high-yield pulping process utilizing one or more treatment stages at alkaline conditions. The invention provides a method for controlling the alkaline treatment step, wherein the alkali is applied at a low temperature treatment stage before one or more consecutive treatment stages at the same or higher temperature. The present invention also provides pulp, paper, board or tissue obtained with said method. | 10-28-2010 |
| 20090165970 | Solidifying Agent for Fibrous Treatment Object and Method of Fixing Treatment Therefor - An object of the invention is to provide a solidifying agent for fibrous treatment objects to be treated or a method of fixing treatment for fibrous treatment objects to be treated. According to the present invention, the solidifying agent for the fibrous treatment objects to be treated mainly contains an aqueous sulfide solution, in which one or a mixture of Group 1 or Group 2 metals or other alkali metal substances is ionically bonded with sulfur. Further, according to the present invention, the solidifying agent for the fibrous treatment objects to be treated mainly contains an aqueous solution of polysulfide of one or a mixture of Group 1 or Group 2 metals or other alkali metal substances. | 07-02-2009 |
| 20140158315 | USE OF SODIUM DITHIONITE IN PULPING - A method of producing cellulose from lignocellulosic material by sulfite digestion or sulfate digestion in the presence of a salt of dithionous acid comprises using the salt of dithionous acid in an amount from 0.1 to 4.0 wt. % based on the amount of oven-dry lignocellulosic material. | 06-12-2014 |
| 20140209261 | TWO-STAGE CHEMI-MECHANICAL PRETREATMENT FOR LIGNOCELLULOSIC BIOMASS - A process for pretreating lignocellulosic biomass that increases monomeric sugar yields in subsequent enzymatic hydrolysis and reduces specific energy consumption during production of the hydrolysable material. The pretreatment includes a chemical treatment followed by a mechanical size reduction such as a disc refining step, and includes a second chemical treatment, harsher than the first, which may precede or follow the size reduction. | 07-31-2014 |
| 162080000 |
Phosphorus, boron or silicon containing | 2 |
| 20110214826 | PROCESS OF TREATING A LIGNOCELLULOSIC MATERIAL - A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. In one embodiment, the pre-extraction step involves contacting the lignocellulosic material with an aqueous solution under conditions that release acidic material from the lignocellulosic material into the aqueous solution, and the aqueous solution includes a basic material that at least partly neutralizes the acidic material so that the aqueous solution at the end of the pre-extraction step has a pH within a range of from 4.5 to 11. The process also includes a pulping step, after the pre-extraction step, in which the lignocellulosic material is separated into pulp. The process further includes an adsorption step, after the pulping step, in which hemicellulose is adsorbed on the pulp. | 09-08-2011 |
| 20140318724 | METHOD AND CHEMICAL COMPOSITIONS TO IMPROVE EFFICIENCY OF CHEMICAL PULPING - The invention provides methods and compositions for enhancing the digestion of pulp in a chemical pulping process. The method uses ultra-low, economically feasible dosages of BH applied right before the pulping process begins, in a stable alkaline solution fed into white liquor line, to improve the process by saving pulping chemicals, increasing pulp brightness and yield and reducing the kappa number. | 10-30-2014 |
| 162079000 |
Heavy metal or aluminum containing | 1 |
| 20160083907 | CRUMB MADE OF PULP - An asymmetric crumb is described that includes 20 to 100 wt % of a para phenylene terephthalamide pulp. Also described are a process for manufacturing the crumb and a material including the crumb. | 03-24-2016 |
| Entries |
| Document | Title | Date |
|---|
| 20110155336 | Method for Increasing the Concentration of Xylose in Lignocellulosic Hydrolysate - Disclosed is a method for increasing the concentration of xylose in lignocellulosic hydrolysate. The method includes the step of extruding lignocellulosic material and mixing the lignocellulosic material with diluted acid and the step of conducting hot-water extraction on the mixture. Hence, the concentration of the xylose in the lignocellulosic hydrolysate can achieve a high concentration of 60 g/L, and the yield of the xylose can reach to 90%. | 06-30-2011 |
| 20120125551 | BIOMASS PRETREATMENT PROCESS FOR A PACKED BED REACTOR - Biomass pretreatment using anhydrous ammonia was found to be effective in a static vessel when the ammonia can penetrate through the biomass particles or pieces in vapor state. To achieve this condition, total system moisture content is kept below 40 weight % based on total mass in the system. The pretreated biomass product is effectively saccharified to produce fermentable sugars for biocatalyst production of a product. | 05-24-2012 |
| 20130277001 | MANUFACTURING FEEDSTOCK FROM FRUIT BY-PRODUCT PROCESSING - A system and method of manufacturing a feedstock for producing paper fiber from fruit of a plant may include providing a by-product source inclusive of fiber from the edible fruit after a process for removing a majority of the edible fruit is used to produce a food. One or more treatment processes to brighten the fruit by-product may be performed. The feedstock may be produced from the brightened fruit by-product. | 10-24-2013 |
| 20160376749 | METHOD FOR PRODUCING NANOFIBRILLATED CELLULOSE - The present invention relates to a method for preparing nanofibrillated cellulose capable of producing high-quality cellulose nanofibrils by a simple process without using the conventional enzymatic treatment, in which a cellulose aqueous dispersion is homogenized by adding an aqueous alkaline solution having a pH between 8 and 14 thereto so that the aqueous alkaline solution aids the swell of an amorphous region of cellulose, thereby promoting the nanofibrillation of cellulose during the homogenizing process. | 12-29-2016 |
