Abstract: Provided is an improved process of vitamin K2 derivatives preparation, represented by formula (I) wherein n is an integer from 3 to 13.

Abstract: A method of obtaining paraffinic hydrocarbons from fat, by an exemplary method, whereby the method is performed in two stages, in a coupled flow-type system, under atmospheric pressure conditions, in the presence of heterogeneous catalysts, after their thermal activation, so that in Stage I the fat and/or waste fat is heated at a temperature range of 100-500° C., in the presence of an inert gas, in the presence of a catalyst in the form of a metal oxide on an oxide support or in the form of a mixture of at least two metal oxides on an oxide support. The product obtained in Stage I is treated, in the presence of an inert gas, at a temperature range of 100-500° C., in the presence of a metallic catalyst on an oxide support, with hydrogen gas or with a mixture of hydrogen and carbon monoxide, obtained in the selective decomposition of methanol.

Abstract: Silica nanopowders with biocidal properties, especially for polymer composites, are produced by sol-gel method. The silica sol is produced from the aqueous mixture containing tetraalkoxysilane, in which alkoxy group contains from C1 to C4 carbon atoms, an alcohol or the mixture of aliphatic alcohols from C1 to C4, in the mole ratio of 1:5 to 1:35, in the presence of ammonium compound, used in an amount of from 0.001 to 0.05 mol per 1 mol of tetraalkoxysilane, with introducing, after thorough mixing of components, the silver salt in the form of aqueous solution in an amount from 0.02 to 1 mol per 1 mol of tetraalkoxysilane, and subsequently the aqueous solution of alkali metal hydroxide in an amount from 0.02 to 1 mol of hydroxide per 1 mol of tetraalkoxysilane.

Abstract: A method of obtaining paraffinic hydrocarbons from fat, by an exemplary method, whereby the method is performed in two stages, in a coupled flow-type system, under atmospheric pressure conditions, in the presence of heterogeneous catalysts, after their thermal activation, so that in Stage I the fat and/or waste fat is heated at a temperature range of 100-500° C., in the presence of an inert gas, in the presence of a catalyst in the form of a metal oxide on an oxide support or in the form of a mixture of at least two metal oxides on an oxide support. The product obtained in Stage I is treated, in the presence of an inert gas, at a temperature range of 100-500° C., in the presence of a metallic catalyst on an oxide support, with hydrogen gas or with a mixture of hydrogen and carbon monoxide, obtained in the selective decomposition of methanol.

Abstract: Silica nanopowders with biocidal properties, especially for polymer composites, are produced by sol-gel method. The silica sol is produced from the aqueous mixture containing tetraalkoxysilane, in which alkoxy group contains from C1 to C4 carbon atoms, an alcohol or the mixture of aliphatic alcohols from C1 to C4, in the mole ratio of 1:5 to 1:35, in the presence of ammonium compound, used in an amount of from 0.001 to 0.05 mol per 1 mol of tetraalkoxysilane, with introducing, after thorough mixing of components, the silver salt in the form of aqueous solution in an amount from 0.02 to 1 mol per 1 mol of tetraalkoxysilane, and subsequently the aqueous solution of alkali metal hydroxide in an amount from 0.02 to 1 mol of hydroxide per 1 mol of tetraalkoxysilane.

Abstract: A method for making polyesterimide varnishes by polycondensing and imidat a mixture of trimellitic anhydride, 4,4'-diamino-diphenyl methane, glycol, dimethyl terephthalate and glycerol or tris(hydroxyethyl) isocyanurate or optionally p,p'-dihydroxy-diphenyl-dimethyl methane, with a transesterification catalyst added, and subsequently dissolving the resulting polyesterimide resin in an organic solvent with a crosslinking catalyst added, characterized by the feature that 2-methyl-1,3-propanediol and/or 2-butyl-2-ethyl-1,3-propanediol is used as the glycol or as one of the glycols.

Abstract: A fastener for closing and sealing pipe ends subjected to internal pressure is applicable for testing plastic pipe for internal pressure resistance. Testing is carried out in apparatuses in which a pipe section is filled with water and then pressure is applied, its value corresponding with desired tension in the pipe wall. In the fastener of the invention forces exerting clamping pressure of fastener elements on pipe ends are derived from internal pressure within the pipe, allowing for disengagement of external supply during hours of testing on the one hand, and on the other hand ensuing proper proportion between this pressure and the forces clamping the fastener elements on pipe end.

Abstract: Subject of the invention is a method and a fastener for closing and sealing ends of pipes subjected to internal pressure, e.g. of plastics pipes tested on internal pressure in suitable apparatus in which a piece of pipe is filled with water with a temperature of about 150.degree. C., and subsequently increased pressure corresponding to required stresses in the pipe wall is established. The method of fixing the fasteners as well as the fasteners themselves should make possible an easy and simple putting them and reliable fixing on the ends of pipes tested as well as their certain sealing. The method according to the invention is characterized by the fact that the fastener elements are clamped on pipe ends by a hydraulic or a pneumatic force. It is profitable if this force stems from the pressure of medium filling the pipe during a test.

Abstract: The invention relates to a process for manufacturing unsaturated polyester resins with suppressed volatilization of monomer, useful in the manufacture of laminates, moulding compounds, varnish coatings and castings. It is known a process for manufacturing unsaturated polyester resins by dissolving unsaturated polyesters in monomers with the addition of paraffin, waxes, ceresin wax, emulsifiers forming emulsions of the "water-in-oil" or "oil-in-water" type. These additives suppress the volatilization of monomers, but they exhibit a limited solubility in the resin and a majority of them separate on the surface during curing of the polyester resin and, thus, reduce the adhesion capacity of the subsequent layers of resin or laminates to the previously cured substrate.It has been found that unsaturated polyester resins with suppressed volatilization of monomer can be prepared by dissolving the unsaturated polyester in the monomer and by introducing 0.005-5.

Abstract: A method for manufacturing bromine and bromine-iodine agents with detergent and disinfecting activity which comprises reacting a complex dibromineiodine ion [IBr.sub.2 ].sup.- or iodine bromide IBr with non-ionic surfactants, e.g. fatty alcohols extended with ethylene oxide, alkylphenols extended with ethylene oxide etc. When [IBr.sub.2 ].sup.- -ion is used in the synthesis, a bromine complex compound corresponding to the general formulaR--(OC.sub.n H.sub.2n).sub.x --OH . . . Br--Br . . . HO--(C.sub.n H.sub.2n O).sub.x --R,wherein R represents an alkyl, alkylamido, aryl or alkylaryl radical of 6-32 carbon atoms n is an integer from 2 to 4 and x is an integer representing the number of oxyalkylene groups and has a value from 2 to 50, is obtained.When using an IBr compound in the synthesis, a bromine-iodine complex compound corresponding to the formulaR--(OC.sub.n H.sub.2n).sub.x --OH . . . I--Br . . . HO--(C.sub.n H.sub.2n O).sub.x --R,wherein R, n and x have the meanings given above, is obtained.

Abstract: A method for manufacturing bromine-polyphosphate and bromine-iodine-polyphosphate complex compounds having detergent and disinfecting properties is described.These compounds disinfectant a wide range of application as efficient disinfectants and disinfectants detergents in such fields as medicine, veterinary medicine, agriculture, dairy and meat industries.