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Dialkyl peroxides are prepared by a process comprising reaction of an alcohol and/or an olefin with an organic hydroperoxide using a solid acidic zeolite catalyst, for example zeolite HY.
Zeolitic molecular sieve crystals are bonded electrochemically, chemically, or by plasma means with a metal matrix. The zeolite-metal composite can be used as a free foil, or it can be fixed on a porous support. The membranes can be used for the separation of liquid mixtures by diffusion, permeation, or pervaporation and as reactive catalyst membranes at high temperature.
Sequestering agents (XO 2 CCH 2 ) 2 NCHR 1 CHR 2 CONHOY (R 1-2 = H, Me, Et; X, Y = H, alkali metal, ammonium) are prepared for use as detergent builders and bleach stabilizers. Iminodiacetic acid, Me acrylate, H 2 NOH, and NaOH were used in the preparation of (HO 2 CCH 2 ) 2 NCH 2 CH 2 CONHOH...
Toluene alkylation with methanol and ethylene over HZSM-5 zeolites has been investigated in order to understand the effects of deposited coke and postsynthesis surface silylation on the toluene conversion and product selectivity. Long time-on-stream kinetic runs, performed under conditions in which total toluene conversion did not decrease but concentration of coke continuously increased were...
Our research shows that 18 O exchange in NaZSM-5 causes isotopic shifts of the Raman bands of the sample. Shifts of i.r. bands were also detected for framework vibrations and for hydroxyl vibrations as well as for the appropriate combination modes in the spectra of 18 O-exchanged NaZSM-5 and HZSM-5. The largest shifts were found for the most intense i.r. band at about 1,100...
The process comprises using a solution or dispersion of 1 of a fluoro salt of Cr and a fluoro salt of Sn at pH 3-7 to replace Al in microporous aluminosilicates by Cr and/or Sn to obtain a framework having the general formula (M w Al x Si y )O 2 (M = Sn and/or Cr; in a triangular diagram, w, x, y = 0.49, 0.01, and 0.50; 0.01, 0.49, and 0.98; and 0.01, 0.01, and 0...
This invention relates to a new form of crystalline material identified as having the structure of zeolite ZSM-23, to a new and useful method for synthesizing the crystalline material, and to use of the crystalline material as a catalyst for organic compound, for example, hydrocarbon compound, conversion.
A process for the manufacture of alkali metal aluminosilicates of zeolite P-type comprises mixing and reacting a sodium silicate solution in a first reaction zone with a sodium aluminate solution and NaOH to form an amorphous aluminosilicate having the general formula (2.5-7.5) Na 2 O: (2.0-3.0) SiO 2 : Al 2 O 3 : (80-250) H 2 O and a supersaturated mother liquor;...
Glycerol, glycidol, or 2,2-dimethyl-1,3-dioxolane-4-methanol is polymerized in the presence of an acid zeolite having an average pore size >0.6 nm and a SiO 2 /Al 2 O 3 mol ratio of 25 at 150-250°C, forming polymers of which 50% are cyclic polymers.
A builder combination containing 15-60% zeolite, 1-30% HO 2 CCH 2 CH(CO 2 H)NHCH(CO 2 H)CH(OH)CO 2 H or its alkali metal or ammonium salt, and 1-20% of an amorphous and/or crystalline silicate is useful in detergents, especially phosphate-free laundry detergents.
A binary metal-exchanged X zeolite having lithium and zinc cations in amounts of preferably 5-40% zinc and 50-95% lithium, wherein the sum of the lithium and zinc ion exchange is 65% of the exchangeable ion content. These adsorbents are useful in a process for separating nitrogen from gas mixtures containing nitrogen and less strongly adsorbed components such as oxygen, hydrogen, argon, or helium.
Coated particles, suitable as replacements for titanium dioxide particles, can be obtained by reacting a titanium or zirconium halide, ether, or ester with hydrated zeolite particles so as to coat the zeolite particles with titania or zirconia. The reaction is preferably conducted between a titanium compound, such as titanium tetrachloride, and the hydrated zeolite particles (the water of hydration...
The first three-dimensional magnetic ferric phosphate with an open structure [Fe 4 (PO 4 ) 4 F 2 (H 2 O) 3 ] [C 6 H 14 N 2 ] has been hydrothermally synthesized (453 K, 24 h, autogeneous pressure) from a mixture of Fe 2 O 3 , H 3 PO 4 , HF, 1,4-diazabicyclo [2.2.2] octane (DABCO), and H ...
Zeolite particles containing Ag and/or Cu ions are included in laundry bars to provide biocidal and deodorant properties. In particular, zeolite particles treated with Ag ions and MeSi(OMe) 3 were used in laundry detergent bars.
A process for the catalytic dehydrogenation of light paraffinic hydrocarbons uses a dehydrogenation catalyst and a polymer-porous solid composite membrane capable of separating hydrogen from the effluent of the dehydrogenation reaction. In an example, a ZSM-5 zeolite with alkali/Al ratio 1:3 was prepared, impregnated with 0.8% Pt, calcined, and used for dehydrogenation of butane using isopropylidenebisaniline-4,4...
Storage-stable granular detergent compositions comprise an alkali metal percarbonate having a mean particle size of 250-900 μm and a hydrophobic material (e.g., comprising 90% zeolite A and 10% hydrophobic silica) in an alkali metal percarbonate:hydrophobic material weight ratio of 4:1 to 40:1.
R 1 COAr(R 2 ) m (R 1 = aryl; Ar = aromatic group; R 2 = H, alkyl; m > 1) are prepared by reaction of R 1 COX (R 1 = same as above; X = Cl, Br) with HAr(R 2 ) m (R 2 , Ar, m = same as above) in the presence of zeolite β.
Crystalline zirconium phosphates with zeolite-like porous structures have formulas: NH 4 Zr 2 (PO 4 ) 3 : mH 2 O (0 m 2), HZr 2 (PO 4 ) 3 and HZr 2 (PO 4 ) 3 : mH 2 O (0 < m 2), specified X-ray diffraction patterns, and oxide mol ratios 4ZrO 2 :3P 2 O 5 . The phosphates...
Manganese(II)/phosphate/organic template hydrothermal reactions were investigated with the aim of preparing novel crystalline porous materials. Ethylenediamine, isopropylamine, and piperidine were explored as organics that would be able to organize oxide moieties of Mn(II) and P(V) into a porous MnPO 4 crystalline lattice. The synthesis in the presence of ethylenediamine yields a product...
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