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| Number | Title | Issue Date |
| 7377993 | Methods for reducing fluorescence in pulp and paper Methods for reducing, and in some cases eliminating, fluorescence in pulp and paper, as well as the resulting articles, are provided. The methods destroy fluorescent activity of agents (e.g., whitening agents) which may be present in the pulp during processing. The ... | 05/27/2008 |
| 7368036 | Xylanase treatment of chemical pulp The present invention discloses methods of bleaching chemical pulp that use xylanase enzymes after chemical bleaching. The method comprises the steps of carrying out a chlorine dioxide stage to produce a partially bleached pulp, treating the partially bleached pulp ... | 05/06/2008 |
| 7364638 | Process for the hot dispersing of a paper fiber stock The present invention is directed to a process for the hot dispersing of a paper fiber stock that includes providing an aqueous paper fiber stock and pressing the aqueous fiber stock in a thickening device. In this manner, water is at least partially removed from th... | 04/29/2008 |
| 7354390 | Seed coat specific nucleotide sequence encoding peroxidase A novel seed coat specific peroxidase genomic sequence is characterized and presented. The seed coat peroxidase is translated as a 352 amino acid precursor protein of 38 kDa comprising a 26 amino acid signal sequence which when cleaved results in a 35 kDa protein. P... | 04/08/2008 |
| 7291247 | Absorbent sheet made with papermaking fibers with durable curl A process for bleaching high bulk cellulosic fiber and producing a durable elevated curl index includes: (a) concurrently bleaching, heat treating and convolving cellulosic fiber pulp at elevated temperature and pressure at high consistency generally under condition... | 11/06/2007 |
| 7282114 | Method for processing pulp The object of the invention is a method and a device for dispersing pulp, especially pulp containing waste paper, in which method ground pulp mass is fed between the blade surfaces (4) of a dispersing device that are brought in a rotating movement in relation to one... | 10/16/2007 |
| 7279073 | Apparatus for liquid-based fiber separation An apparatus for treating fibrous material is disclosed. The apparatus may include a fiber separator, a de-liquefier, a dry-to-wet blender and a flash dryer. The fiber separator may be a liquid-based fiber separator. The de-liquefier is for removing liquid from the ... | 10/09/2007 |
| 7195755 | Compositions comprising at least one hydroxide compound and at least one reducing agent, and methods for relaxing hair Compositions, optionally heat-activated, methods and kits for lanthionizing keratinous fibers to achieve relaxation of said keratinous fibers comprising applying to keratinous fibers a composition comprising at least one hydroxide compound and at least one reducing ... | 03/27/2007 |
| 7189329 | Control of development of biofilms in industrial process water There is provided a method of inhibiting the development of a biofilm adjacent a surface, the method comprising intermittently applying a biofilm inhibiting substance to a collection of microorganisms having biofilm developing potential. Other embodiments are also d... | 03/13/2007 |
| 7169257 | Method of deinking waste paper using a reduced alkali system The present invention relates to methods and compositions for deinking waste paper, optionally in non-alkaline or low-alkaline systems. Deinking compositions are provided that include a blend of an alkoxylated fatty alcohol and a fatty acid. The compositions may fur... | 01/30/2007 |
| 7101832 | Cleaners containing peroxide bleaching agents for cleaning paper making equipment and method A cleaning solution for paper making equipment includes a stabilized source of peroxide in combination with a glycol ether solvent system and an alcohol ethoxylate. The peroxide system can be hydrogen peroxide stabilized with a phosphonate such as HEDP. The glycol s... | 09/05/2006 |
| 7074299 | Process for using a phloroglucinol color delta to control blending, deinking and bleaching of groundwood-containing secondary pulp A method of processing papermaking fiber includes characterizing the initial color of the pulp and the color of the pulp after treatment with a phloroglucinol stain. The color response of the pulp to the stain has been found to be a better indicator of processing ne... | 07/11/2006 |
| 6923887 | Method for hydrogen peroxide bleaching of pulp using an organic solvent in the bleaching medium Disclosed is a method for pulp bleaching. The method comprises the steps of providing a pulp sample for bleaching, the pulp sample stemming from a pulp producing process, providing a bleaching liquor comprising water and an organic component as solvent components co... | 08/02/2005 |
| 6918949 | Method for contacting large volumes of gas and liquid across microscopic interfaces A method for contacting large volumes of gas and liquid together on a microscopic scale for mass transfer or transport processes wherein the contact between liquid and gas occurs at the interfaces of a multitude of gas bubbles. Multiple porous tubes assembled in a b... | 07/19/2005 |
| 6899790 | Method of providing papermaking fibers with durable curl A process for producing high bulk cellulosic fiber exhibiting a durable elevated curl index includes: (a) concurrently heat treating and convolving cellulosic fiber pulp at elevated temperature and pressure at high consistency under conditions selected so as to prec... | 05/31/2005 |
| 6482292 | Styrene copolymers in de-inking Provided herein are compositions of matter useful in de-inking secondary fibers. A composition according to the invention includes an aqueous solution of an anionic form of a styrene-methacrylic acid copolymer. When a surfactant is used in combination wit... | 11/19/2002 |
| 6458240 | Method for removing contaminants from fibers in recycle fiber pulping An improved process for the separation of cellulosic fiber from difficult to process coated and inked paper products is disclosed and claimed. This process readily separates the paper pulp fraction substantially free of contaminants from such waste paper ... | 10/01/2002 |
| 6432263 | Process for increasing the water retention capacity in fibrous webs Process for increasing the water retaining ability of fibrous paper stocks. The process includes knead dispersing a fibrous paper stock having a stock concentration of at least about 20% and a temperature greater than about 45° C. A treatment for the kne... | 08/13/2002 |
| 6432262 | Method of bleaching recycled papers with hydrogen peroxide stabilized with a methylolhydantoin A method of stabilizing hydrogen peroxide in an aqueous solution, such as a circulating water slurry, comprising a peroxide, such as hydrogen peroxide. The aqueous solution may include organic matter. The method comprises adding an aldehyde donor, such as... | 08/13/2002 |
| 6419786 | Method for bleaching wood pulp containing recycled paper A method of treating wood-fiber pump, particularly wood-fiber pulp that contains recycled paper, comprises delivering the pulp to and advancing the pulp in a heating zone while delivering steam to the heating zone. The pulp is finely-divided in a disperse... | 07/16/2002 |
| 6387211 | Methods for reducing fluorescence in paper-containing samples The present invention provides methods for reducing fluorescence in a paper-containing sample. Methods for destroying fluorescent whitening agents in a paper-containing sample are also provided.... | 05/14/2002 |
| 6319356 | Process for controlling odor in paper and paperboard using a halohydantoin A method of inhibiting the autooxidation of fatty acids in a paper product made from pulp fiber is accomplished by adding to the pulp fiber between about 1 mole/metric ton and about 25 moles/metric ton, preferably between about 2 moles/metric ton and abou... | 11/20/2001 |
| 6294047 | Methods for reducing fluorescence in paper-containing samples The present invention provides methods for reducing fluorescence in a paper-containing sample. Methods for destroying fluorescent whitening agents in a paper-containing sample are also provided.... | 09/25/2001 |
| 6251220 | Wastepaper deinking method using amine or acid salt of amine in the flotation stage A deinking method comprising the steps of liberating ink from waste paper as a raw material and removing the liberated ink from a flotation system, wherein a nonionic surfactant, e.g., a reaction product obtained by adding an alkylene oxide to a mixture o... | 06/26/2001 |
| 6241849 | Methods for deinking and decolorizing printed paper The present invention relates to methods for deinking and decolorizing a printed paper, comprising: (a) pulping the printed paper to obtain a pulp slurry; (b) dislodging an ink from the pulp slurry with one or more enzymes; (c) decolorizing the dye contai... | 06/05/2001 |
| 6217706 | Method of de-inking paper and other cellulosic materials A method of de-inking cellulosic fibrous materials comprising: a. admixing an alkaline reagent selected from the group consisting of ammonium hydroxide and hydrogen peroxide and mixtures thereof with an aqueous suspension of inked cellulosic fibrous material s... | 04/17/2001 |
| 6179957 | Method for controlling deinking process using contact angle In a deinking process at least comprising the step of stripping ink from wastepaper as the starting material and the step of removing the stripped ink from a flotation system, the contact angle of the aqueous solution portion of a slurry containing the st... | 01/30/2001 |
| 6153300 | Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals Recycled paper pulp having at least two different types of paper which consume widely different amounts of bleaching chemical, or mixed hardwood and soft-wood pulps, are treated in a manner that enhances distribution and redistribution of bleaching chemic... | 11/28/2000 |
| 5997689 | Method of pre-treating secondary fibers with oxygen in a disperser A method of bleaching secondary fibers. A secondary fiber pulp is first slushed and then transferred at a consistency of 20-40% to a disperser. In the disperser, the secondary fiber pulp is mechanically treated and mixed so that ink particles in the secon... | 12/07/1999 |
| 5958179 | Process for increasing pulp whiteness by bleaching printed wastepaper under intense dispersing mechanical treatment A process for increasing a degree of whiteness of paper pulp may include bring paper fiber pulp, which may at least partially include printed waste paper, into a suspension with water. The suspension may be mixed with bleaching aids and bleaching chemical... | 09/28/1999 |
| 5958184 | Process for producing thiourea dioxide A process for producing a thiourea dioxide fluid by mixing thiourea and a peroxide, or thiourea, a peroxide and a reaction catalyst, or thiourea, a peroxide, a reaction catalyst and a chelating agent, in the absence or presence of pulp and a process for b... | 09/28/1999 |
| 5900111 | Process for sanitizing post-consumer paper fibers using heat and hydrogen peroxide The invention relates to a process for sanitizing post-consumer wastepaper fibers for liquid packages and containers, a paper product for food packaging and a liquid food container. The process comprises providing paper fibers from a wastepaper recycle pr... | 05/04/1999 |
| 5895556 | Waste paper treatment process A waste paper treatment process for the recycle and re-use of waste paper, which process comprises treating the waste paper, in a repulper, with a surfactant, in the absence of traditional repulper chemicals such as silicate, caustic and peroxide. The sur... | 04/20/1999 |
| 5885412 | Inhibition of hydrogen peroxide decomposing enzymes during bleaching of cellulose fibers A method and composition for suppressing or inhibiting the decomposing action of enzymes on hydrogen peroxide, e.g. peroxidase and catalase, during bleaching of cellulose fibres with hydrogen peroxide, especially in connection with the production of recyc... | 03/23/1999 |
| 5801135 | Deinking composition comprising a fatty acid mixture and a nonionic surfactant A liquid deinking composition comprising (a) a fatty acid mixture containing 40 to 90 weight % of saturated fatty acids having 12 to 14 carbon atoms and less than 60 weight % of saturated fatty acids having 16 to 18 carbon atoms, (b) a nonionic surfactant... | 09/01/1998 |
| 5770010 | Pulping process employing nascent oxygen This invention relates to an environmentally preferred process for the delignification of a cellulosic biomass comprising pulp. The process uses the oxidative properties of nascent oxygen to complete pulping and bleaching operations. The process may be us... | 06/23/1998 |
| 5755926 | Integrated pulping process of waste paper yielding tissue-grade paper fibers This invention provides an integrated system for recovering fibers from mixed grades of waste paper and simultaneously cleaning (deinking) waste fibers. The system comprises a mild alkaline pulping process with oxygen and hydrogen peroxide followed by rap... | 05/26/1998 |
| 5755925 | Bleaching recycled pulp with ozone and hydrogen peroxide A method of bleaching recycled paper containing pulp wherein said pulp is contacted with ozone in an ozone stage (Z) treatment with a brightness stabilizing step during or at the end of said ozone stage (Z), said stabilizing step consisting of contacting ... | 05/26/1998 |
| 5733412 | Decolorizing brown fibers in recycled pulp The invention relates to a method for decolorizing paper pulp containing colored fibers. The paper is first pulped and subjected to fine screening. The screened pulp is then dispersed at a temperature in excess of 100° C. and a pressure exceeding one atm... | 03/31/1998 |
| 5718837 | Persulfate mixtures for repulping wet strength paper A composition containing a persulfate and a carbonate, a bicarbonate or sesquicarbonate, which composition is suitable for oxidizing wet strength resin based broke used in wet strength paper. The combination decreases the time required for effectively rep... | 02/17/1998 |
