Abstract: The present invention is a solid catalyst component for polymerization of olefins prepared by contacting a magnesium compound, a tetravalent halogen-containing titanium compound, a diester of an aromatic dicarboxylic acid, an aromatic hydrocarbon and an organic aluminum compound containing a hydroxyl group represented by the following general formula (R1CO2)mAl(OH)3-m or aluminum hydroxide. The catalyst for polymerization of olefins comprising said solid catalyst component, an organic aluminum compound represented by the general formula R2pAlQ3-p and an organic silicon compound represented by the general formula R3qSi(OR4)4-q can retard the rate of forming a polymer having a low molecular weight or a low stereoregular polymer which is soluble in a polymerization solvent in slurry polymerization and can obtain a high stereoregular polymer in a high yield, and also can obtain a copolymer having an excellent property in a high yield in the copolymerization of olefins.

Abstract: The invention provides a processing method for a high-pure titanium having fine grains by cold forging, through which the processing steps are simplified and scale growth is prevented. The invention uses high-pure titanium having a purity of 4N or higher (99.99%, except for gas inclusions), and forges the titanium raw material in the temperature range from room temperature to 300° C., then anneals the titanium raw material in the temperature range from 400 to 600° C.

Abstract: The objective of the present invention is to provide a solid catalyst component and a catalyst for polymerization of olefins, which shows a high activity, can lower the rate of forming a polymer having a low molecular weight or a low stereoregular polymer which is soluble in a polymerization solvent and can obtain a high stereoregular polymer in a high yield. The present invention is a solid catalyst component(A) for polymerization of olefins prepared by contacting (a) dialkoxymagnesium, (b) a titanium compound, (c) a diester of an aromatic dicarboxylic acid, (d) an aromatic hydrocarbon and (e) an organic silicon compound containing a hydroxyl group, and a catalyst for polymerization of olefins prepared from the solid catalyst component (A) , an organic aluminum compound (B) represented by the general formula R2pAlQ3-p and an organic silicon compound (C) represented by the general formula R3qSi(OR4)4-q.

Abstract: A process for producing metallic powders a chlorination step for continuously producing chloride gas of metal by reacting metal with chlorine gas, and a reduction step for continuously reducing the metallic chloride gas by reacting the metallic chloride gas produced in the chlorination step with reducing gas. Regulating the feed rate of the chlorine gas can control the feed rate of the metallic chloride gas, whereby the particle diameters of produced metal powders can be stably controlled. Thus, the invention can make the particle diameters stable and arbitrarily control the diameters in the range of 0.1 to 1.0 &mgr;m.

Abstract: Titanium hydride powder with a maximum particle diameter of substantially 150 &mgr;m or less, the powder with particle diameters of 10 &mgr;m or less being 8% or less by weight, which is produced via step for embrittling a titanium and titanium alloy by hydrogenation, and titanium powder with a maximum particle diameter of which is 150 &mgr;m or less, the powder with particle diameters of 10 &mgr;m or less being 5% or less by weight. In the powder the oxygen content and the chlorine content are reduced, and the flowability and compactibility are excellent. This powder is particularly suitable for a raw material to produce a sintered titanium or titanium alloy product by the powder metallurgy.

Abstract: The present invention provides a solid catalyst component for polymerization of olefins obtained by allowing a solid component and an alcohol to come in contact with each other, wherein the solid component is prepared by allowing a magnesium compound, a titanium compound and an electron donor compound to come in contact with each other, and also provides a catalyst for polymerization of olefins made of the solid catalyst component, an organic aluminum compound represented by the general formula R.sup.1.sub.p AlQ.sub.3-p and an organic silicon compound represented by the general formula R.sup.2.sub.q Si(OR.sup.3).sub.4-q. By using the catalysts in a polymerization of olefins, polyolefins excellent in stereoregularity can be obtained in high yield.

Abstract: A propylene homopolymer having a high stereo-regularity and an excellent processability during sheet or film formation, characterized in that it exhibits a melt flow rate (MFR) of from 0.1 to 20 g/10 min., a xylene-soluble component content of not more than 6% by weight and an isoblock content [IB] of at least 3 mol % as determined by the following equation (1) from Pmmmr, Pmmrr and Pmrrm, which are absorption intensities attributed to isoblock chain in xylene-insoluble component by .sup.13 C-NMR spectrum:[IB]=[Pmmmr]+[Pmmrr]+[Pmrrm] (1)wherein [Pmmmr], [Pmmrr] and [Pmrrm] are the relative intensity ratio (mol %) of Pmmmr, Pmmrr and Pmrrm, respectively, which are absorption intensities attributed to isoblock chain.

Abstract: A high strength, high ductility titanium alloy comprising O, N and Fe as strengthening elements and the balance substantially Ti, the contents of the strengthening elements satisfying the following relationships (1) to (3):(1) from 0.9 to 2.3% by weight of Fe,(2) up to 0.05% by weight of N, and(3) an oxygen equivalent value Q, which is defined by the formula mentioned below, of 0.34 to 1.00Q=[O]+2.77[N]+0.1[Fe]wherein [O] is an oxygen content (% by weight), [N] is a nitrogen content (% by weight) and [Fe] is an iron content (% by weight), the titanium alloy having a tensile strength of at least 700 MPa and an elongation of at least 15%. Part of Fe may be replaced with Cr and/or Ni. Fe, Cr and Ni may be introduced from a carbon steel or stainless steel, or they may be introduced from sponge titanium containing these elements.

Abstract: A solid catalyst component for polymerization of olefins prepared by reacting a titanium halide, a diester of aromatic dicarboxylic acid and a dialkoxymagnesium having a bulk density of at least 0.25 g/ml and an average particle size of 1 to 100 .mu.m. The average rate of temperature rise from the temperature at which the titanium halide is allowed to come in contact with the dialkoxymagnesium to the temperature at which the reaction is initiated is in a range of from 0.5 to 20.degree. C./min. Such catalyst can further comprise an organic aluminum compound and an organic silicon compound. The use of said catalyst makes it possible to efficiently obtain a polyolefin having a high stereoregularity, a high bulk density and excellent particle properties.

Abstract: A solid catalyst component (A1) for polymerization of olefins prepared by contact with a solid component (d) obtained by allowing (1) a solid component (a) obtained by allowing (i) a dialkoxymagnesium or diaryloxymagnesium, (ii) a titanium compound and (iii) a diester of aromatic dicarboxylic acid to come in contact with one another and (2) a solid component (b) obtained by allowing (i) a dialkoxymagnesium or diaryloxymagnesium, (ii) a titanium compound, (iii) a diester of aromatic dicarboxylic acid and (iv) a polysiloxane to come in contact with one another, to come in contact with each other, or a solid catalyst component (A2) for polymerization of olefins prepared by allowing said solid component (a) and (3) a solid component (d) obtained by allowing (i) a dialkoxymagnesium or diaryloxymagnesium, (ii) a titanium compound, (iii) a diester of aromatic dicarboxylic acid, (iv) a polysiloxane and (v) an aluminum compound to come in contact with one another, to come in contact with each other.

Abstract: The present invention provides a solid catalyst component (A) obtained by allowing a dialkoxymagnesium or diaryloxymagnesium, a titanium compound, a diester of phthalic acid and a cyclic or chain polysiloxane to come in contact with one another.Further, the present invention provides a catalyst for polymerization of olefins prepared from the foregoing solid catalyst component (A), an organic aluminum compound and an organic silicon compound.

Abstract: An organosilicon compound represented by formula (I) ##STR1## wherein R.sup.1 and R.sup.2 which may be the same or different, each represents an alkyl group having 1 to 3 carbon atoms. The organosilicon compound is used as en effective electron donor ingredient of a Ziegler-Natta catalyst for olefin polymerization.

Abstract: A solid catalyst component for polymerizing olefins, which can provide a streoregular polymer having a low density of 0.900 to 0.906 g/ml at a high yield and a low RDS and which can prepare the polymer containing less fine powders. The solid catalyst component is prepared using substances (a) to (d) and optionally substance (e):(a) a dialkoxymagnesium represented by Mg(OR.sup.1).sub.2, wherein R represents a straight chain or branched chain alkyl group or an aryl group;(b) an aluminium compound represented by Al(OR.sup.2).sub.n X.sup.1.sub.3-n, wherein R.sup.2 represents a straight chain or branched chain alkyl group; X.sup.1 represents a halogen atom, and n is 0 or an integer of 1 to 3;(c) titanium tetrachloride;(d) a diester of dicarboxylic acid; and(e) a dimethyl polysiloxane.

Abstract: A catalyst for the polymerization of olefins comprising (A) a solid catalyst component essentially containing magnesium, titanium, an electron donor compound, and a halogen which is prepared by contacting a magnesium compound, a titanium halide compound, and an electron donor compound, (B) an organoaluminum compound, and (C) an organosilicon compound and a process for polymerizing an olefin using the same are disclosed, the organosilicon compound (C) being represented by formula (I): ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group having from 1 to 3 carbon atoms; R.sup.3 and R.sup.4, which may be the same or different, each represents an alkyl group having from 1 to 3 carbon atoms, or a halogen atom; and m and n each represents 0 or an integer of 1 or 2. A polyolefin having high stereoregularity and broad molecular weight distribution can be obtained in high yield.

Abstract: A solid catalyst component prepared under specific conditions by reacting with a reaction product which has been obtained by suspending diethoxymagnesium in an alkylbenzene and bringing the suspension into contact with titanium tetrachloride, phthaloyl dichloride at 80.degree.-125.degree. C.

Abstract: A solid catalyst component prepared by admixing and reacting, with a reaction product which has been obtained by suspending diethoxymagnesium in an alkylbenzene and bringing the suspension into contact with titanium tetrachloride in an amount less than 1 in terms of volume ratio to the alkylbenzene, a phthaloyl dichloride at a temperature within the range between 80.degree. C. and 125.degree. C., washing the resultant solid substance with an alkylbenzene, and reacting the solid substance in the presence of an alkylbenzene with titanium tetrachloride in an amount less than 1 in terms of volume ratio to the alkylbenzene as well as an olefin polymerization catalyst which comprises (A) the above specified solid catalyst component, (B) a silicon compound of the general formula: SiR.sub.m (OR').sub.

Abstract: An endosseous implant including at least an embedding portion to be embedded in a living tissue, the embedding portion comprising any of a platelike body itself and a desired shape of body obtained by working the platelike body, the platelike body having orderly or disorderly a plurality of substantially straight tubular channels passing through the thickness of the platelike body for permitting the ingrowth and penetration of the adjacent bone tissue therein, the tubular channels including at least two kinds of three different pore diameters of large, medium, and small pore diameters respectively for permitting the ingrowth and penetration of a bone tissue, osteoid tissue, and fibrous tissue, whereby a polycapillary structure is built by the ingrowth and penetration of the at least two of the three kinds of tissues which pass through the thickness of the platelike body after the implantation.

Abstract: A frameless and coreless porous endosseous implant comprising a porous sintered metal layer (2) having a range of relatively large pores and porous sintered metal layers having a range of relatively small pores and laminated into one body by sintering integrally with the layer on either side thereof, or a porous singered metal layer having a range of relatively small pores and porous sintered metal layers having a range of relatively large pores and laminated into one body by sintering integrally with the layer on either side thereof, whereby the three layers each permit the ingrowth and penetration out of two or more kinds out of fibrous tissue, osteoid tissue and bone tissue in the pores thereof.

Abstract: An electrolytic cell recovery of metal comprising a first partition wall provided with partition openings situated beneath the level of an electrobath and disposed between a dissociated metal recovery chamber and an electrolytic chamber having an anode and a cathode and a second partition wall adapted to constitute an intermediate chamber between the first and second partition walls for recovery of dissociated Cl.sub.2 gas; and also the arrangement of bipolar electrodes in the electrolytic cell and the shape of a control plate for preventing the deposition of sludge.

Abstract: A high strength titanium material having an improved ductility, contains 0.1 to 0.8% by weight of iron, a required oxygen and nitrogen satisfying the following expression, in which an oxygen equivalence Q ranges from 0.35 to 1.0,Q=[O]+2.77 [N]+0.1 [Fe]wherein[O] is an oxygen content % by weight[N] is a nitorgen content % by weight[Fe] is an iron content % bt weightthe rest being titanium and inevitable impurities, the oxygen and nitrogen exists as interstitial type solute elements in the titanium material, and the titanium material exhibits a two phase, an equiaxed phase or a lamellar phase, fine grain microstructure and has a tensile strength of 65 kgf/mm.sup.2 or more, and a method for producing same.