A method of producing sodium hydroxide from the waste water stream of the production process of fibre pulp, which stream comprises organic waste and sodium bound to it. According to the present method, the waste water stream is concentrated and then burnt under oxidising conditions, in order to break up the organic waste and the sodium compounds. According to the present invention, borate or a compound which forms borate, is added into the waste water stream, after which the sodium compounds are brought to an autocausticising reaction. The reaction is carried out at a temperature which is high enough to evaporate the sodium and the sodium is mainly in oxide form. The, at least partial, conversion of sodium carbonate into sodium hydroxide, according to the present invention, improves the usability of the alkali which is recovered for instance by using the Alrec process, which, in turn, lowers the costs of chemicals and reduces the energy consumption required for the defϊbring of wood chips, which is subsequent to impregnation.

Disclosed is a paper laminate wherein a homopolyethylene terephthalate coating having heat sealing properties and a uniform thickness is formed by directly coating a paper base with a low-cost easily available homopolyethylene terephthalate by extrusion coating, without interposing an adhesive layer therebetween. Also disclosed is a method for producing a paper laminate, wherein a coating that is composed of a homopolyethylene terephthalate is formed on at least one surface of a paper base by extrusion coating. The method for producing a paper laminate is characterized in that the air gap (L), which represents the distance from the lip opening of the T-die to the paper base (B), is not more than 25 cm.

The invention relates to a method and apparatus for verification of a mobile telephone number. The method comprises: storing a mobile telephone number and a corresponding mobile subscriber identity number; receiving a request for verification of the mobile telephone number; sending, in response to the request, an IMSI query requesting a mobile subscriber identity number registered in association with the mobile telephone number in an HLR; receiving, in response to the IMSI query, the mobile subscriber identity number associated with the mobile telephone number in the HLR; comparing the stored mobile subscriber identity number and the received mobile subscriber identity number, and, if the comparison shows that the received mobile subscriber identity number corresponds to the stored mobile subscriber identity number; initiating the performance of the messaging-or- positioning service in relation to the mobile telephone number.

An exhaust gas recirculation system (10) for recirculating exhaust gases from an exhaust conduit (9) of a combustion engine (1), particularly a large combustion engine having an engine power of 500 kW or more, to an air intake (3) thereof, which system comprises: -two or more particulate filters (12a, 12b) arranged in parallel with each other; - valve means (17) for selectively switching the respective filter between an active state and an inactive state, the valve means being configured to allow exhaust gases to pass from the exhaust conduit to the air intake through a filter which is in the active state and to prevent exhaust gases from passing from the exhaust conduit to the air intake through a filter which is in the inactive state; and - filter regeneration means (40) for selectively initiating a regeneration of the respective filter when the filter is in the inactive state.

A feed system for a comminuted cellulosic material including: a chip bin having an upper chip inlet, an interior chamber oriented generally vertically and a lower discharge port; at least one liquor inlet to the chip bin to inject liquor in the chip bin, wherein the chip bin retains sufficient liquor and chips within the interior chamber to create a hydraulic pressure on the chips at the lower discharge port; a generally horizontally oriented chip conveyor or tube coupled to the lower discharge port to receive the chips and liquor from the bin under the hydraulic pressure, wherein the conveyor or tube includes liquor injectors which inject liquor into the chips and the conveyor or tube, and a high pressure transfer device coupled to a discharge of the conveyor or tube to receive the chips and liquor, whereby the hydraulic pressure of the chips and liquor at the discharge of the chip bin is sufficient to feed the chips and liquor to the high pressure transfer device.

The outer layer of a surface (11) is cut away by means of a high-pressure water jet by providing two parallel guides (12, 13; 51, 52) parallel to the surface, mounting a feed beam (22) between the guides, reciprocating a jet unit (33, 34) along the feed beam in cutting passes and moving the feed beam in steps along the guides in order to cut away the entire surface. The feed beam (22) is moved in steps between two cutting passes by providing two gripping jaws (40, 41), one fixed and one movable, for each guide (12, 13; 51, 52) and allowing one gripping jaw of each guide in turn to grip while the other is released, the movable gripping jaw (41) being displaced a predetermined length along the guide with the fixed gripping jaw in the gripping position.

A method of separating mixed particles in a flotation cell (1) uses a fluidization zone (22) within the cell where particles are fluidized in a quiescent zone by liquid moving upwardly through the fluidization zone (22). The fluidizing liquid may be provided by the feed (21) or by recycling liquid from upper parts of the cell such as from the disengagement zone (40). Bubbles are introduced into the lower part of the cell through a mechanical impeller (2) which also breaks up any channels in the mixing zone (5), or by separate aeration in the bottom of the cell or by introduction through a recycle pipe.

A method for production of ammonium phosphates comprises providing (210) of a phosphorus-loaded water immiscible liquid phase, adding (212) of anhydrous ammonia to the water immiscible liquid phase, precipitating (214) of mono-ammonium phosphate and/or di-ammonium phosphate from the water immiscible liquid phase and extracting (218) of the precipitated mono-ammonium phosphate and/or di-ammonium phosphate from the water immiscible liquid phase. The method further comprises controlling (216) of a temperature of the water immiscible liquid phase during the adding (212) and precipitating (214) to a predetermined temperature interval.

A device including a hollow cylindrical body, first and second stationary coaxial annular screening screens disposed within the body, and a rotor within the body and positioned between the screens to conduct the slurry through the first screen and then through the second screen, the rotor being driven in rotation. The pulp slurry passes through a central entry pipe, radially outward and then upward along the inside of the rotor, further inward through a coarse screen cylinder, and then around the end of the rotor to pass between the outer surface of the rotor and the inner surface of a fine screen cylinder. The pulp slurry then finally passes outward through the fine screen cylinder.

An ectoparasiticidal composition is provided that comprises a mixture of a carrier and an active with an emulsifying agent. The carrier comprises non- volatile low viscosity siloxane and the active comprises a non-volatile high viscosity siloxane. The low viscosity siloxane and the high viscosity siloxane both have a closed cup flash point of at least 100° C. Preferably, both the low viscosity siloxane and the high viscosity siloxane comprise a dimeticone or a dimeticonol or a mixture of same, the the low viscosity siloxane having a viscosity in the range of 5 to 1000 centistokes inclusive and the high viscosity siloxane having a viscosity of at least 1000 centistokes.