Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8133352 | Method and apparatus for reducing impurities in cellulose fibers for manufacture of fiber reinforced cement composite materials A method of manufacturing high purity fiber cement grades of cellulose fibers is described. Additional washing steps, coupled with an elevated temperature, are used in the process to extensively wash the pulps and remove substantially all COD components remaining in... | 03/13/2012 |
| 7402224 | Method for producing paper pulp, lignins, sugars and acetic acid by frantionation of lignocellulosic vegetable material in formic/acetic acid medium A method for producing paper pulp from a lignocellulosie vegetable raw material. The method includes contacting the raw material with a mixture of formic acid and acetic acid (in an amount more than 5 wt. % of the mixture) at a temperature and for a suitable reactio... | 07/22/2008 |
| 7396435 | Method for conveying, mixing, and leveling dewatered pulp prior to drying Methods for conveying, mixing, leveling, and flaking dewatered pulp to produce pulp flakes suitable to be used in a dryer. Methods for producing a consistent flow rate of pulp, and, for producing uniform pulp flakes in terms of pulp flake size and pulp flake moistur... | 07/08/2008 |
| 7390378 | Method of curling fiber and absorbent sheet containing same A method of providing papermaking fibers with durable curl comprising: a) introducing papermaking fiber into a rotatable drum adapted for operation at elevated pressure; b) rotating the drum containing the papermaking fiber while maintaining: i) the fiber in aqueous... | 06/24/2008 |
| 7384502 | Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness Wood chips having low bleachability are impregnated with a chemical liquor at a pH range of 7-12 in aqueous solution and the chemical liquor from the impregnated chips is drained, whereby extractives contained in the chips and consuming bleaching agents can be remov... | 06/10/2008 |
| 7364639 | Method of producing twisted, curly fibers A method of forming twisted, curly fibers from a wet wood pulp without the aid of a wet fluffing process or a chemical cross-linker. The method includes forming the wet wood pulp into fiber bundles and subsequently thermally drying the fiber bundles. The invention a... | 04/29/2008 |
| 7314538 | Process and device for discharging lignocellulose raw materials from a digester and conveying the raw material to a refiner A process for refining lignocellulose raw materials, especially wood chips, saw dust, annual plants or wood waste, includes dewatering the lignocellulose raw materials discharged from a digester, extracting condensate produced during dewatering, and refining the dew... | 01/01/2008 |
| 7300541 | High defiberization chip pretreatment A chip pretreatment process which comprises conveying the feed material through a compression screw device having an atmosphere of saturated steam at a pressure above about 5 psig, decompressing and discharging the compressed material from the screw device into a de... | 11/27/2007 |
| 7300540 | Energy efficient TMP refining of destructured chips A system and method for thermomechanical refining of wood chips comprises preparing the chips for refining by exposing the chips to an environment of steam to soften the chips, compressively destructuring and dewatering the softened chips to a solids consistency abo... | 11/27/2007 |
| 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 |
| 7229527 | Method for the controlled thickening of low consistency fiber suspensions The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the ... | 06/12/2007 |
| 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 |
| 7182835 | Two-stage chlorine bleaching process with filtrate recirculation Methods for bleaching chemical pulp are disclosed including dewatering the pulp to a concentration of from 25 to 40%, bleaching in a first chlorine dioxide stage, followed by a second alkaline bleaching stage, followed by a third chlorine dioxide bleaching stage, de... | 02/27/2007 |
| 7166229 | Method and apparatus for extracting liquid present in a humid mass A system for extracting a liquid by pressing a humid mass, the system including at least one extraction channel, while extraction channel being provided with at least one inlet allowing to feed the extraction channel with the humid mass to be treated; with walls pro... | 01/23/2007 |
| 7108916 | Absorbent structures comprising coated super-absorbent polymer particles This invention is directed to super-absorbent material, which comprises a super absorbent polymer core that is coated with an organic, polar coating agent, and whereby the particulate super-absorbent material has a contact angle and a corresponding cos CAm | 09/19/2006 |
| 7097740 | Method and screen for screening at least two pulp mixtures The invention relates to a method and a screen for screening two or more pulp mixtures with different roughness. The screen comprises a first screen cylinder and a second screen cylinder. A coarse first pulp mixture is fed into the inlet end of the first screen cyli... | 08/29/2006 |
| 7022827 | Xylanase, microorganisms producing it, DNA molecules, methods for preparing this xylanase and uses of the latter The invention relates to an isolated and purified culture of Bacillus sp. strain 720/1 (LMG P-14798); to xylanases obtained from this strain and xylanases obtained from derivatives and mutants of strain 720/1. The invention also relates to a DNA molecule enco... | 04/04/2006 |
| 6923889 | Printing paper The invention relates to coated printing paper which contains mechanical pulp and whose opacity is at least 89%, brightness at least 65% and surface roughness not more than 4.5 μm. The printing paper contains mechanical pulp at least 90 weight-% of the total fiber ... | 08/02/2005 |
| 6866749 | Method for bleaching paper pulp with organic peracids followed by peroxide and sodium hydroxide The invention concerns a method for bleaching different types of paper pulp in two steps at atmospheric pressure and at a temperature not higher than 100 DEG C. The first step consists in contacting the unbleached paste with a mixture of paracetic acid and performic... | 03/15/2005 |
| 6818099 | Raw material for printing paper, method to produce it and printing paper The object of the present invention is a method for making mechanical pulp, such as thermomechanical or chemi-thermomechanical stock. The mechanical pulp is utilised as a raw material for printing paper, and its freeness value is 30—70 ml CSF. According to the met... | 11/16/2004 |
| 6767432 | Apparatus for the thickening of fiber suspensions The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the ... | 07/27/2004 |
| 6736934 | Method of pretreating pulp in an acid tower prior to bleaching with peroxide The present invention relates to a method of pretreating, by acidification and chelation, of pulp to be bleached with peroxide. Especially, the invention relates to intensifying, and at the same time simplifying the pretreatment required by peroxide bleaching. It is... | 05/18/2004 |
| 6576088 | Process for preparing dry broke Process for preparing dry broke in one of a paper, cardboard or coating machine. The process includes diluting the dry broke to a consistency of between about 15 to 60%, and slushing the dry broke with shear forces sufficient to crush filler particles in ... | 06/10/2003 |
| 6562192 | Absorbent articles with absorbent free-flowing particles and methods for producing the same Free flowing particles useful in absorbent articles are disclosed, including fibrous nits and methods of preparing fibrous nits. In one embodiment, fibrous nits are prepared from disperging cellulosic fibers in the presence of a nit conditioner which modi... | 05/13/2003 |
| 6558557 | Process and a decker for bringing together two suspension layers Process and decker for bringing together a first aqueous pulp suspension layer with at least one additional suspension layer. The process includes moving the first pulp suspension layer and the at least one additional suspension layer on moving layer supp... | 05/06/2003 |
| 6514381 | Method and apparatus for continuous mechanical thickening of slurry Methods and corresponding devices are set forth for the continuous mechanical dewatering of aqueous suspensions or elutriations, particularly of waste-paper suspensions or slurries, between an endless mesh band and an endless compression surface having a ... | 02/04/2003 |
| 6447645 | Feeding cellulose material to a treatment vessel A feed system for a cellulose pulp treating vessel (such as a continuous digester) is not limited by the required L/W ratio of the pump feeding a wood chip slurry to a high pressure transfer device, the feed system may be kept at a low temperature to mini... | 09/10/2002 |
| 6436233 | Feeding cellulose material to a treatment vessel A feed system for a cellulose pulp treating vessel (such as a continuous digester) is not limited by the required L/W ratio of the pump feeding a wood chip slurry to a high pressure transfer device, the feed system may be kept at a low temperature to mini... | 08/20/2002 |
| 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 |
| 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 |
| 6409883 | Methods of making fiber bundles and fibrous structures A method of making fiber bundles and fibrous structures. The efficacy of a fiber bundle in handling complex fluids may be improved by subjecting an aqueous suspension of fibers at high consistency to elevated energy input with sufficient working of the fi... | 06/25/2002 |
| 6391151 | Process for dissolving used paper Process for dissolving used paper including adjusting a content of solid particles of used paper to a range between about 15 and 35%, kneading the used paper with a specific work of at least about 10 kWh/t, diluting the kneaded used paper to a content of ... | 05/21/2002 |
| 6372086 | Pulper and countercurrent washer sugar cane extraction Processes are disclosed for extracting sugar rich liquor from sugar cane. The sugar cane is first treated by pulping it in two tub type pulpers having a rotating impeller. The contents of the first pulper are extracted through the bedplate of the extracto... | 04/16/2002 |
| 6354514 | Method and apparatus for treating material having poor thermal conductivity A method and an apparatus for heating or cooling material having poor thermal conductivity, especially medium-consistency fiber suspensions. The material is directed, substantially as a plug flow, at a velocity below 5 m/s (e.g. 0.1-1 m/s) through an appa... | 03/12/2002 |
| 6348127 | Process for production of chemical pulp from herbaceous plants A process for production of chemical fibrous pulp for making paper, paperboard and other fibrous products from herbaceous plants, such as kenaf. Pulp from the herbaceous plant is made by a process which involves densification of pieces of all or part of t... | 02/19/2002 |
| 6336993 | Metal removal from comminuted fibrous material during feeding A system and method for feeding a slurry of comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester also treat the material to remove metals before digestion. During pumping of the slurry wi... | 01/08/2002 |
| 6325890 | Feeding comminuted fibrous material A system and method for feeding comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester provide enhanced simplicity, operability, and maintainability by eliminating the high pressure transfe... | 12/04/2001 |
| 6290811 | Method for recycling of old corrugated container using flotation and kneading treatment The present invention relates to a method for recycling of old corrugated container (OCC) using flotation and kneading treatment and more particularly, to a method for recycling of OCC, wherein OCC is treated withflotation and kneading, treatment, and the... | 09/18/2001 |
| 6221265 | Method and device for concentrating liquid-drenched material Methods for the concentration of a dilute material such as a fiber suspension are disclosed including enclosing the dilute material between a first straining belt and a second straining belt both moving through endless paths, and in which the width of the... | 04/24/2001 |
