Abstract:
lightweight ceramic brick having 0.08-1.5 mm micropore, 0.3-0.9 g/cm3 bulk density and 5-30 kg/cm2 compressive strength is produced by foaming a slurry as a ceramic raw material with a foaming agent, mixing the foamed material with a viscosity- controlling agent and strength-promoting agent, and molding, drying and firing the mixt. The slurry has 7-14 of hydrogen- ion concentration coefficient. The ceramic brick is used as a furnace material and low-temp. plant material.
Abstract:
TtLl(SP)m-[M(II)1-xM(III)x(OH)2 X+(Ax/n)= yH2O) is one that anion phosphine metal complex(eqn 1: TtLl(SP)m) is coupled between layers of hydrotalcite compound (eqn 2: [M(II)1-xM(III)x(OH)2 X+(Ax/n)= yH2O), where T is Rh, Co, Ru, Ir, Pt, Ni, Cu, Mn, Fe, Pd, Ag or Au; L is Cl, CO, NO, COD, H, SR, OH, NH3 or alkylamine; SP is anion phosphine ligand, sulfonated or carbonated alkyl or anion allyl phosphine; t is 1-2; l is 0-8; m is 1-8; M(II) is Mg, Ni, Co, Fe, An, Cu or Li; M(III) is Al, Cr or Fe; A is organic or inorganic anion with quantity of electric charge of n; X is 0.2-0.4; n is the quantity of electric charge of A; y is the number of water molecule.
Abstract:
This is new heteropolyacid-based catalyst of formula (I). The manufacturing method comprises :1)dissolving 12-molybdophosphoric acid in water followed by adding phosphoric acid and vanadium pentoxide; 2)refluxing the mixture for 12hrs at an elevated temp. to produce molybdovanadophosphoric acid solution(A); 3)dissolving one kind of Cu, Ce, Ru, Bi, Sb N-heterocyclic compd and above one of oxalic acid or its salts(B); 4)adding solution B to solution A with stirring at 30-80deg.C and maturing the stirred mixture; 5)cooling it to room temp and stirring for 30min, filtering and washing it; 6)drying the cake and molding; and 7)1st firing at 380-450deg.C for 2-10hrs, and 2nd firing at 260-420deg.C for 2-10hrs.