摘要:
The present invention relates to a compound based on an alkaline-earth metal, on sulphur and on aluminium, on gallium or indium, to its process of preparation and to its use as luminophore. The compound of the invention corresponds to the formula AB2S4, in which A represents an alkaline-earth metal and B aluminum, gallium, or indium and it is characterized in that it is provided in the form of a powder with a residual oxygen content of not more that 1.5% and composed of particles with a mean size of not more than 10 &mgr;m. This compound is obtained by a process which contains the following stages: a solution or a suspension comprising salts of the elements A and B is formed, the solution or the suspension is dried by atomization and the product obtained in the preceding stages is reacted with carbon disulphide or with a mixture of hydrogen sulphide and or carbon disulphide. The compound of the invention can be used as a luminophore, in particular in cathodoluminescence.
摘要:
A composition is essentially of an ettringite base and contains from about 45 to 93% calcium trisulfoaluminate and from about 7 to about 55% tobermorites, of which from about 0 to 25% is hydrated silica, counted in the form of SiO.sub.2.
摘要:
The present invention relates to a compound based on an alkaline-earth metal, on sulphur and on aluminium, on gallium or indium, to its process of preparation and to its use as luminophore. The compound of the invention corresponds to the formula AB2S4, in which A represents an alkaline-earth metal and B aluminum, gallium, or indium and it is characterized in that it is provided in the form of a powder with a residual oxygen content of not more that 1.5% and composed of particles with a mean size of not more than 10 nullm. This compound is obtained by a process which contains the following stages: a solution or a suspension comprising salts of the elements A and B is formed, the solution or the suspension is dried by atomization and the product obtained in the preceding stages is reacted with carbon disulphide or with a mixture of hydrogen sulphide and or carbon disulphide. The compound of the invention can be used as a luminophore, in particular in cathodoluminescence.
摘要:
Processes are provided for preparing basic aluminum compounds of Formula I:Al.sub.2 (OH).sub.6-a X.sub.a (I)wherein X is Cl.sup.-, Br.sup.-, F.sup.-, I.sup.-, SO.sub.4.sup.= or NO.sub.3.sup.- and a is about 0.9 to 4, the compound being characterized by size exclusion chromatography as having a Band I percent aluminum value of about 5% or less and a Band II percent aluminum value of about 50% to 90%, which comprise (a) suspending an aluminum metal in an aqueous medium to form a slurry, (b) applying ultrasonic energy to the slurry, (c) reacting the sonicated slurry with an aluminum compound of Formula IIAl.sub.n X.sub.m (II)or an acid of Formula III:H.sub.n X (III)wherein X is Cl.sup.-, Br.sup.-, F.sup.-, I.sup.-, SO.sub.4.sup.= or NO.sub.3.sup.-, n is 1 or 2 and m is 3, at a temperature of about 45.degree. C. to 100.degree. C. to form a reaction product.
摘要:
The present invention is one-step method for synthesizing a synthetic anion intercalated hydrotalcite material. The method comprises reacting an aluminum source with a magnesium source in the presence of an inorganic acid of the anion to be intercalated, and in the absence of a Group IA metal source. The resulting slurry can be dried to form the final product.
摘要:
Compound having the formula MZSX.sub.2, wherein M is an alkali metal, Z is selected from the group consisting of boron, aluminum, gallium, indium, and thallium, and X is a halogen.
摘要:
The invention relates to a solid ionic conductor for a rechargeable non-aqueous electrochemical battery cell having the stoichiometric formula K(ASXX′)p×q SO2, where K represents a cation from the group of the alkali metals with p=1, of the alkaline-earth metals with p=2 or of the zinc group with p=2, A represents an element from the third main group, S represents sulfur, selenium or tellurium, X and X′ represent a halogen, and the numerical value q is greater than 0 and less than or equal to 100.
摘要:
A wastewater clarificant very excellent in the powers for removing BOD, COD and SS is provided. The clarificant comprises an aqueous solution containing a polynuclear complex salt that is obtained by subjecting to isochoric heating an aqueous solution containing a mixture of sulfates of a plurality of metals selected from the group consisting of potassium, iron, calcium, sodium, magnesium and aluminum. Preferably, the clarificant comprises an aqueous solution containing a polynuclear complex salt that is obtained by subjecting to isochoric heating an aqueous solution containing a mixture of sulfates of a plurality of metals selected from the group consisting of, in molar concentration, 0.02 to 0.08 of potassium, 0.11 to 1.31 of iron, 0.003 to 0.030 of calcium, 0.004 to 0.040 of sodium, 0.27 to 0.81 of magnesium and 0.370 to 1.300 of aluminum.
摘要:
The present invention is directed to a new and useful group of calcium, zinc and magnesium flocculating agents which may be beneficially utilized to treat and purify waste water and/or other waste liquids resulting from a variety of industrial processes. The general ion free formula of these inorganic flocculating agents is represented as follows:(Me.sub.2 O.sub.3).sub.m.sup..cndot. (Me.sub.2 O.sub.3 Cl).sub.(m+z).sup..cndot. (MeO).sub.n.sup..cndot. (SiO.sub.2).sub.t.sup..cndot. (SO.sub.4).sub.yThese flocculating agents may also be represented by the theoretical formula of:Me.sub.n.sup.II Me.sub.o.sup.II Me.sub.m.sup.III (OH).sub.p (SiO.sub.2).sub.t.sup..cndot. (Aci).sub.z (SO.sub.4).sub.ywhere:(a) Me.sub.n.sup.II is selected from the divalent cationic group consisting of: (1) Ca.sup.2+, (2) Mg.sup.2+ and (3) Ca.sup.2+ and Mg.sup.2+ ;(b) Me.sub.o.sup.II is divalent cationic Fe.sup.2+ ;(c) Me.sub.m.sup.III is selected form the trivalent cationic group consisting of: (1) Al.sup.3+, (2) Fe.sup.3+ and (3) Al.sup.3+ and Fe.sup.3+ ;(d) Aci is selected from the monovalent anionic group consisting of: (1) Cl.sup.-, (2) Br.sup.-, (3) I.sup.-, (4) NO.sub.3.sup.-, (5) CH.sub.3 COO.sup.- and (6) two or more of Cl.sup.-, Br.sup.-, I.sup.-, NO.sub.3.sup.- and CH.sub.3 COO.sup.- (preferably Aci is Cl.sup.-);(e) n=1 to 5;(f) o=0 to 10;(g) m=1 to 15;(h) p=1 to 15;(i) z=0 to 15;(j) y=0 to 15; and(k) t=0 to 15.Processes for manufacturing flocculating agents belonging to this group of materials are also revealed.