摘要:
A method for preparing a molecular sieving metallosilicate is disclosed which comprises(A) providing a mixture comprising: water; an oxide of silicon source; a mineralizing agent and/or synthesis directing agent; and a heteropolymetallate of the formulaA.sub.a L.sub.l M.sub.m J.sub.z O.sub.y .dH.sub.2 O whereinA is an ion selected from the group consisting of hydrogen; one or more of the Group I-A to VI-A or Group I-B to VI-B metals; one or more of the rare earth metals; ammonium, alkyl ammonium, alkyl phosphonium or alkyl arsonium; or a mixture of two or more thereof;M is Zn, Ga, Ge, Ti, Cr, Mn, Fe, Co, B, Ni, Rh, Zr or a mixture of two or more thereof;L is P, As, Si, Al, H or a mixture of two or more thereof;J is Mo, W, V, Nb or a mixture of two or more thereof;a is a number which when multiplied by the charge of A will result in balancing the charge on the complex within the brackets;l is a number ranging from zero to about 20;m is a number ranging from zero to about 20;z is a number ranging from about 1 to about 50;y is a number ranging from about 7 to about 150;d is a number ranging from about zero to about 150; and(B) maintaining said mixture at a temperature of about 80.degree. C. to about 300.degree. C. for an effective period of to form said molecular sieving metallosilicate.
摘要:
A method is disclosed for making molecular sieving high silica mordenite comprising the steps of:(A) providing a mixture comprising: water; an oxide of silicon source; an oxide of aluminum source; a mineralizing agent; and a synthesis directing nitrogen containing organic dye; and(B) maintaining said mixture at a temperature of about 80.degree. C. to about 300.degree. C. for an effective period of time to provide said mordenite.
摘要:
A method is disclosed for making a silica molecular sieve comprising:(A) providing a mixture comprising: water; an oxide, hydroxide or alkoxide of silicon; a mineralizing agent; and a synthesis directing nitrogen containing organic dye; and(B) maintaining said mixture at a temperature of about 80.degree. C. to about 300.degree. C. for an effective period of time to provide said silica molecular sieve.
摘要:
A molecular sieving metallosilicate is disclosed which comprises a complex represented in terms of mole ratios of oxides by the formula: ##STR1## wherein A is an ammonium, alkyl ammonium, alkyl phosphonium or alkyl arsonium ion; D is an alkali or alkaline earth metal ion or a mixture of two or more thereof; E is selected from the group consisting of Al, B, Mo, W, Fe, or a mixture of two or more thereof; M is a tetravalent metal selected from the Lanthanide or Actinide series; a is a number ranging from zero to about 25; b is a number ranging from zero to about 1.5; c is a number ranging from zero to about 0.3; d is a number ranging from about 20 to about 500; e is a number ranging from zero to about 200. The X-ray diffraction pattern for these metallosilicates indicates a ZSM-5 like crystalline structure. A method for making these metallosilicates, and a method for dehydrating and reforming methanol using these metallosilicates are disclosed.
摘要:
A method is disclosed for separating and immobilizing a radioactive material comprising: contacting an aqueous medium containing said radioactive material with a reactive composition comprising at least one alkali metal, at least one Group IIIB metal and at least one phosphorus oxide; maintaining said reactive composition in contact with said aqueous medium for an effective period of time to react a desired amount of said radioactive material with said reactive composition to form a radioactive-material-containing composition; and separating said radioactive-material-containing composition from said aqueous medium. Radioactive-material-containing compositions exhibiting low leach rates are also disclosed.
摘要:
Acetylene and other 1-alkynes are polymerized by a catalyst system comprised of a transition metal complex consisting of at least one binucleating ligand attached to at least one transition metal containing nucleus; and at least one organometallic cocatalyst containing at least one element of Group 1a, 2a or Group 3a.
摘要:
Improved activated carbon electrodes are disclosed which electrodes have increased charge storage capacity and reduced leakage current. Such improved electrodes are incorporated into energy storage devices such as electric double layer capacitors. The improved charge storage capacity is due to the adsorption of polyoxometalate compounds onto the activated carbon, and reduced leakage current is achieved by stabilizing the polyoxometalate compounds within the activated carbon through the use of a compound capable of generating at least one ionic site.
摘要:
A novel transition metal complex catalyst comprised of a transition metal attached to a ligand containing electron withdrawing substituents is employed in a polymerization process for producing nylon type polyamides.
摘要:
The invention relates to a process for the conversion of ethane to liquid aromatic hydrocarbons comprising contacting, at a temperature of from about 500.degree. C. to about 700.degree. C., an ethane rich feedstock with a catalyst comprising a gallium modified molecular sieve catalyst, promoted with rhenium and a metal selected from the group consisting of nickel, palladium, platinum, rhodium and iridium.
摘要:
A yttrium-silicate molecular sieve is disclosed which comprises a complex represented in terms of mole ratios of oxides as follows:aA.sub.2 O:Y.sub.2 O.sub.3 :bSiO.sub.2 :cH.sub.2 Owherein A is an alkali metal; a is a number ranging from about 0.5 to about 20; b is a number ranging from about 2 to about 400; and c is a number ranging from about 1 to about 500.