| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 162090000 | Alkali metal, ammonium, alkaline earth metal or magnesium hydroxide or carbonate | 6 |
| 20090165971 | METHODS FOR PREPARING ALKALI CELLULOSE AND WATER-SOLUBLE CELLULOSE ETHER - Provided is a method for preparing cellulose ether which is transparent as dissolved in water and has low water-insoluble content. More specifically, provided are a method for preparing alkali cellulose comprising a contact step of bringing a pulp sheet having a pore volume of 1.0 ml/g or greater, or chips into which the pulp sheet has been converted, into contact with an alkali metal hydroxide solution to obtain an alkali cellulose reaction mixture, and a drain step of draining the alkali cellulose reaction mixture; and a method for preparing water-soluble cellulose ether comprising a step of reacting the alkali cellulose with an etherifying agent. | 07-02-2009 |
| 20090165972 | METHODS FOR PREPARING ALKALI CELLULOSE AND WATER-SOLUBLE CELLULOSE ETHER - Provided is a method for preparing cellulose ether which is transparent as dissolved in water and has low water-insoluble content. More specifically, provided is a method for preparing alkali cellulose, comprising a contact step of bringing a pulp sheet having a sheet density of 0.60 g/ml or less or being formed from pine, or chips into which the pulp sheet has been converted, into contact with an alkali metal hydroxide solution at 5 to 70° C. for 10 to 600 seconds to obtain an alkali cellulose reaction mixture, and a drain step of draining the reaction mixture, wherein an amount of the alkali metal hydroxide solution to be used for the contact step is selected so that the alkali cellulose obtained by the drain step has a ratio of a weight of alkali metal hydroxide component determined by neutralization titration of the alkali cellulose to a weight of solid component in the pulp {(alkali metal hydroxide component)/(solid component in the pulp)} of 0.3 to 1.5. Also provided is a method for preparing water-soluble cellulose ether, comprising a step of reacting the resulting alkali cellulose with an etherifying agent. | 07-02-2009 |
| 20100186912 | PULP PRODUCTION - A process for the production of a paper pulp, comprising preparing the pulp from a raw material derived from a plant of the Araceae family. | 07-29-2010 |
| 20110209839 | Method for making absorbent products - A method of making personal hygiene articles of high absorbency from cellulosic fiber pulp without chemical cross-linking of the cellulosic fibers is disclosed. The method comprises interposing a sublayer of mechanically fluffed alkali extracted cellulosic fiber pulp between a fluid permeable layer and a fluid impermeable layer. | 09-01-2011 |
| 20110272110 | METHOD AND SYSTEM FOR HIGH ALPHA DISSOLVING PULP PRODUCTION - A method for pulp processing used in connection with a pre-hydrolysis kraft process (PHKP) includes adding wood chips or similar material to a reaction vessel, performing pre-hydrolysis, and neutralizing the mixture with a first quantity of white liquor followed by a different solution such as a cold caustic extraction alkaline filtrate optionally enriched with white liquor. The neutralization fluids are replaced with a cooking fluid comprising a hot black liquor and alkaline filtrate, optionally enriched with white liquor. The cooking fluid may have a relatively high effective alkali concentration. The cooked pulp may exhibit very low residual hemicelluloses and a kappa number within an optimal range. | 11-10-2011 |
| 20130062027 | METHOD FOR PREPARING NONIONIC WATER-SOLUBLE CELLULOSE ETHER - Provided is a method for preparing nonionic water-soluble cellulose ether having low insoluble content and providing a transparent solution. More specifically, provided is a method for preparing nonionic water-soluble cellulose ether comprising at least the steps of: drying a pulp sheet or pulp chips into which the pulp sheet has been converted, bringing the dried pulp sheet or pulp chips into contact with an alkali metal hydroxide solution to obtain alkali cellulose, draining the alkali cellulose, and reacting the drained alkali cellulose with an etherifying agent. | 03-14-2013 |
