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Kemira Oy. Patents
Assignee:
Kemira Oy.
Address:
Helsinki, FI
No. of patents:
42
Patents:












Patent Number Title Of Patent Date Issued
D253197 Helmet October 23, 1979
5764203 Breathing mask with a display unit June 9, 1998
The invention relates to a breathing mask (1) having a display unit (5) comprising a display screen, the function of the unit being to display measurement data in the visual field of the mask wearer, the display screen being implemented by using a mechanical and/or electronic light m
5695609 Process for producing paper December 9, 1997
The invention relates to a process for the production of paper by adding to an aqueous fiber suspension, which possibly contains a filler, auxiliary agents for improving retention and/or dewatering, the auxiliary agents being a cationic long-chain polyacrylamide and an aluminum salt, and
5612277 Catalyst and method for manufacturing the same March 18, 1997
A catalyst is made of at least two metal foil strips, the transverse corrugations having been formed in at least one of them. The metal foil strips are formed into a honeycomb containing channels. The strips are coated with a support or with supports, and at least one catalytically a
5611928 Process for treating waste water March 18, 1997
The invention relates to a process for the treatment of waste waters of the forest industry. According to the invention, waste water is pre-treated biologically, whereafter the further treatment is carried out by using Fe(II) salt and hydrogen peroxide.
5603911 Preparing a crystalline, stable sodium percarbonate February 18, 1997
The object of the invention is a process for preparing a crystalline, stable sodium percarbonate, in which polymers of gross formulas (I or II) are added in the preparation process to control the crystal form of the sodium percarbonate and to coat the crystals, the molecular weight of th
5583087 Method for impregnating catalyst support with platinum December 10, 1996
The invention relates to a method for impregnating alumina-containing catalyst support with platinum. In the method a platinum-containing solution is prepared by using a compound which contains bivalent platinum. The method comprises a stage during which the said platinum-containing
5580533 Catalyst and process for purifying diesel exhaust gases December 3, 1996
The invention relates to a catalyst intended for purifying diesel exhaust gases, the catalyst comprising a honeycomb and a support which has been prepared by using titanium dioxide and an inorganic sol, and at least one catalytically active agent.
5534476 Use of a super alloy as a substrate for catalysts July 9, 1996
A metal alloy in which the highest individual metal concentration is nickel and which always includes at minimum 4% by weight aluminum is used as the substrate for catalysts for purifying exhaust gases. Chromium, iron, cobalt, molybdenum and titanium are among the other metals possible.
5482529 Fertilizing preparation improving the extraction of phosphorus for plants January 9, 1996
A controllably active fertilizing preparation in the form of an emulsion-suspension or an emulsion is comprised of:a) 30-90% by weight of mixtures containing plant nutrients,b) 5-50% by weight of water,c) 2-20% by weight of an oleophilic organic substance,d) 1-25% by weight of a surface-active s
5445717 Method for simultaneous production of alkali metal or ammonium peroxodisulphate salts and alkali August 29, 1995
The present invention relates to a method for simultaneous continuous-action production of alkali metal or ammonium peroxodisulphate salts and alkali metal hydroxide. The electrolytic phase of the method is performed in a three-space electrolytic cell (1), into the middle space (3) w
5443811 Method of preparing titanium dioxide August 22, 1995
The invention relates to a method of preparing microcrystalline titanium dioxide, in which a) the solid titanium dioxide hydrate is treated with a base, b) the precipitate treated with the base is treated with hydrochloric acid, and c) the precipitate treated with the base and the hy
5443808 Method of producing alkali metal phosphate August 22, 1995
The invention relates to a method for producing alkali metal phosphate, in particular monopotassium phosphate or its aqueous solution, by reacting fertilizer-grade phosphoric acid with alkali metal chloride at 350.degree. . . . 700.degree. C. to produce alkali metal metaphosphate, hydrol
5435985 Hydrogenation catalyst for use in a hydrogen peroxide process, and method for the preparation th July 25, 1995
The invention relates to a hydrogenation catalyst for use in the preparation of hydrogen peroxide and to a method for the preparation of the catalyst. The hydrogenation catalyst contains in the main platinum group metal, of which more than 50 wt % is palladium. According to the inven
5250276 Method for preparing ferric chloride October 5, 1993
A method for preparing anhydrous ferric chloride from a hydrous solution containing ferric chloride that contains organic substances and/or ferrous chloride. In the method, water is removed from a ferric-chloride water solution or a solution, in which at least a portion of the ferrous
5217629 Procedure for cleaning filter used in production of hydrogen peroxide from anthraquinone June 8, 1993
The present invention relates to a procedure for cleaning a sinter used for filtering a metal catalyst suspension. As taught by the invention, the sinter is treated with an aqueous solution of hydrogen peroxide for displacing the metal catalyst left in the pores of the sinter with the ai
5196179 Process for the production of hydrogen peroxide March 23, 1993
The invention relates to a process for converting anthrahydroquinone dissolved in an organic solvent to hydrogen peroxide and anthraquinone by causing a mixture of oxygen and anthrahydroquinone to flow concurrently through a reaction zone. According to the invention, the mixture of oxyge
5178847 Process for producing ceramic raw materials January 12, 1993
The invention relates to a process for the production of silicon ceramic whiskers and silicon ceramic powder from silicon fluoride and ammonia or a hydrocarbon, at an elevated temperature. According to the invention, the hydrocarbon or ammonia (4) is decomposed separately at a high tempe
5165995 Process for coating titanium dioxide pigments November 24, 1992
The object of the invention is a process for coating a titanium dioxide pigment according to which a dispersion of titanium dioxide in water is formed, optionally in the presence of a dispersing agent, such as a water soluble silicate and/or an aminoalcohol, whereafter to the titanium
5114701 Method for producing hydrogen peroxide and solvent system for use in the hydrogen peroxide produ May 19, 1992
The invention concerns a method for producing hydrogen peroxide using a process based on anthraquinone derivatives. According to the invention the solvent system of the working solution in said process contains carbamate having a general formula ##STR1## where groups R.sup.1 and
5076849 Transparent metal oxide pigment and method for its preparation December 31, 1991
The invention relates to a method for the preparation of transparent metal oxide pigment, in which a substantial portion of the silicon oxide is dissolved off from silicon dioxide based particles coated with transparent metal oxide, and to a transparent metal oxide pigment prepared by th
5071634 Process for the preparation of hydrogen peroxide (I) December 10, 1991
The invention relates to a process for the production of hydrogen peroxide by the anthraquinone process. A reaction mixture into which there are fed hydrogen or a hydrogen-containing gas and a working solution, i.e. an anthraquinone derivative in an organic solvent, is circulated via a
5061317 Colored nacreous pigment and a method for its preparation October 29, 1991
The invention relates to a new nacreous pigment which contains a dye or a color pigment and is based on metal-oxide-coated mica particles or other layer silicate particles, and to a method for preparing it. The pigment particles consist of metal-oxide-coated, porous silica skeletons of m
5055275 Reinforced catalytic unit intended for purifying exhaust gases October 8, 1991
The invention relates to a reinforced catalytic unit intended for purifying exhaust gases. The unit is a reinforced helical catalytic unit formed from a corrugated foil band and a straight foil band. The foil bands are coated in advance with both a layer of support material and a layer o
4991424 Integrated heatable sensor February 12, 1991
The invention concerns a sensor construction for, e.g., the measurement of gas concentration, including a sensor element; a heating element arranged in conjunction with the sensor, with which the sensor element can be brought to a temperature above the ambient gas atmosphere temperature;
4905687 Method and apparatus for regulating air supplied to a gas mask March 6, 1990
The invention relates to a method by which the amount of air supplied to a gas mask is kept essentially constant by using the fan motor (1) as a sensor, with the aid of which its power is regulated. The electronic regulation circuit of the invention keeps the air amount constant by r
4811907 Method and apparatus for improving the grinding result of a pressure chamber grinder March 14, 1989
A method and apparatus for improving the grinding result of a pressure chamber grinder includes a feeder for feeding material into a pressurized equalizing tank, then transferring the material into a pre-grinder where the material is fluidized by grinding-gas jets. The fluidized material
4775463 Process for the flotation of phosphate mineral and an agent to be used in the flotation October 4, 1988
The invention relates to a method of separating phosphatic minerals from phosphate ores, especially from phosphate carbonate ores by flotation in the presence of a collector, which comprises a compound having the general formulaor its salt, in which formulal and m are mutually independen
4756896 Method of preparing silicon July 12, 1988
The invention relates to a method for preparing polycrystalline pure silicon by reducing gaseous silicon tetrafluoride at a raised temperature by means of alkali metal or alkali earth and by recovering the silicon by means of liquid phase separation. According to the invention, the gaseo
4756801 Paper-making method and a combination of ingredients to be used in it July 12, 1988
In a paper-making method cellulose is suspended in water and the obtained pulp suspension is dewatered in order to form a fiber web or a fiber sheet, water being removed from a pulp suspension which contains an organic polymer and an inorganic oligomeric Ti, Zr, Sn or B compound.
4755743 Method and apparatus for measuring the moisture content or dry-matter content of materials using July 5, 1988
A method and apparatus for measuring the moisture content or dry content of either high or low loss materials having a moisture content in excess of 50% utilizing a dielectric waveguide in contact with the material to be measured. The waveguide may be either embedded into the wall of a p
4755285 Process for the froth-flotation of a phosphate mineral, and a reagent intended for use in the pr July 5, 1988
The invention relates to a process for the separation of phosphate minerals from a phosphate ore, especially from a phosphate-carbonate ore, by using in the flotation as the reagent selective for phosphate mineral a compound having the general formula I, or a salt or amide ##STR1##
4741082 Method for manufacturing and reinforcing a catalytic unit intended for purifying exhaust gases May 3, 1988
The invention relates to a method for making and reinforcing a catalytic unit intended for purifying exhaust gases, in which method a helical catalytic unit is formed from a corrugated foil band (2) and a straight foil band (3), placed one on top of the other, by securing the foil bands,
4737491 Wood preservative April 12, 1988
A wood perservative is disclosed which contains water, a copper and/or zinc complex or a copper and/or zinc complex together with a zirconium complex, dissolved in water, and an acid which stabilizes the said metals in wood. According to the invention there is used as the acid which stab
4732708 Method for converting vegetable material into chemicals March 22, 1988
The invention relates to a method for converting biopolyesters consisting of straight-chain hydroxyacid monomers containing 10 to 40 carbon atoms, such as suberin and cutin, into a plain mixture of organic acids and their salts containing only a few main components. The depolymerization
4662929 Method for recovering nutrients from the flue gases of a fertilizer plant May 5, 1987
The invention relates to a method of recovering nutrients from the flue gases of a fertilizer plant by exposing hot, almost water-saturated reaction gases (4) obtained from the fertilizer production process to a countercurrent scrubbing (5, 6) and by scrubbing the hot gases (19) obta
4595589 Fungistatic method June 17, 1986
The invention relates to a method for preventing fungus diseases in plants grown in, for example, a bed containing peat, by adding to the vegetation or the soil streptomyces griseaviridis stains ATCC 39271, 39272 and 39273. The aqueous suspension preferably contains at least 10.sup.5 spo
4375989 Coated titanium dioxide pigment and a process for the production of the same March 8, 1983
The dispersability of a titanium dioxide pigment is improved by coating it with an organic coating and also an inorganic coating in a total amount of, expressed as oxide, not more than 0.5% and no less than 0.3% of the weight of the pigment. Suitable inorganic coatings are oxides and
4349660 Process for the production of air drying modified amino resin September 14, 1982
A process for the production of an air-drying, modified amino-resin, which process comprises co-polycondensing one or more dialkyl ether compounds, which are dialkyl ether of the dimethylol derivatives of compounds containing two primary amido groups or similar groups, with at least one
4210747 Process for the preparation of viscose July 1, 1980
A process for the preparation of viscose by adding to cellulose pulp, manufactured by alkali cooking without prehydrolysis or by acid cooking without alkali extraction, steeping lye and an organic compound, steeping the pulp to form alkali cellulose, aging the alkali cellulose, xanthatin
4164582 Synergistic fungicidal compositions August 14, 1979
A fungicide, especially for the dressing of cereal seeds, which contains: methylbenzimidazole-2-ylcarbamate and 1-[.beta.-(allyloxy)-2,4-dichlorophenethyl]imidazole, phenylcarbamoyl-1,4-oxatine or 1,2-di-(3-methoxycarbonyl-2) or methylbenzimidazole-2-ylcarbamate or 1-[.beta.-(all
4163045 Process for producing hydrogen fluoride from an aqueous solution of hydrogen fluoride and sulfur July 31, 1979
A process for producing hydrogen fluoride from an aqueous solution of hydrogen fluoride and sulfuric acid by distillation at an elevated temperature, in order to evaporate hydrogen fluoride of a desired concentration, in which the aqueous solution of hydrogen fluoride and sulfuric ac

 
 
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