Abstract: A zeolite catalyst and a method for reduction of nitrogen oxides present in waste gas streams is described. The method includes mixing the waste gas containing nitrogen oxides with ammonia. At an elevated temperature, this mixture is passed over a zeolite catalyst. Preferably, the zeolite catalyst is in a monolithic or honeycomb form. The zeolite catalyst includes one or more of the following subgroup metals: copper, iron, molybdeum and cerium. The zeolite catalysts made in accordance with this invention show better conversion of nitrogen oxides and longer life than known catalysts.

Abstract: Catalytic dealkoxylation of gem-dialkoxy compounds for synthesizing vinyl ethers is disclosed. Zeolites of the mordenite or ZSM5 type with an Na.sub.2 O/Al.sub.2 O.sub.3 molar ratio of 1:1.05 (.+-.0.25) are used as catalysts.

Abstract: A catalyst for the production of hydrocarbon consists essentially of crystalline aluminum silicate, at least one compound of the metal zinc and/or cadmium and additionally silica. The catalyst is produced by heating a crystalline aluminum silicate, in a given case partially or completely converted to the hydrogen form, with a zinc and/or cadmium compound and molding with a silica containing binder.

Abstract: Alcohols and/or aliphatic ethers are converted to hydrocarbons employing catalysts consisting of crystalline aluminum silicate, a compound of zinc and/or cadmium and additional silica. The catalyst is produced by treating a crystalline aluminum silicate, in a given case, partially or completely converted into the hydrogen form with a zinc or cadmium compound and shaping with a silica containing binder.

Abstract: Templating compounds of the formula:(HO--C.sub.2 H.sub.4).sub.3 N.sup..sym. --(CH.sub.2).sub.n -N.sup..sym. (C.sub.2 H.sub.4 --OH).sub.3 2 Br.sup..crclbar.wherein n equals 3, 4 or 5 are produced by reacting triethanolamine with .alpha., .omega.dibromoalkanes, for example in the presence of a solvent. One can also react dibromoalkane with the triethanolamine in dropwise manner at reaction temperature. The product is subsequently recovered by known methods. The templating compositions can be used for the preparation of the zeolites of the pentasil types. These zeolites have the composition represented by the summary formula:(0.4-0.7)Na.sub.2 O/(0.3-0.6)Q.sub.2 O/Al.sub.2 O.sub.3 /(30-80)SiO.sub.2 /(4-10)H.sub.2 Oand have the following X-ray diffraction pattern:______________________________________ d .ANG. I/Io ______________________________________ 11.0 .+-. 0.2 30-70 10.0 .+-. 0.2 30-80 4.4 .+-. 0.1 10-20 4.3 .+-. 0.1 10-20 3.85 .+-. 0.05 100 3.74 .+-. 0.05 40-65 3.66 .+-. 0.05 20-40 3.43 .+-. 0.03 15-25 2.

Abstract: There is produced coarse particle mordenite by treating a reaction mixture consisting essentially of on a molar basis 2.5-10 Na.sub.2 O, Al.sub.2 O.sub.3, 15-30 SiO.sub.2, 400-4000 H.sub.2 O, 5-30 NaCl in an autoclave at a temperature of 140.degree. to 180.degree. C. until formation of crystals separating the crystalline product, washing with water and drying.

Abstract: A catalyst for the production of hydrocarbon consists essentially of crystalline aluminum silicate, at least one compound of the metal zinc and/or cadmium and additionally silica. The catalyst is produced by heating a crystalline aluminum silicate, in a given case partially or completely converted to the hydrogen form, with a zinc and/or cadmium compound and molding with a silica containing binder.

Abstract: The crystalline aluminosilicate PZ 1 is produced by carrying out the crystalline in the presence of an organic template compound of the formula R.sub.3 P--(CH.sub.2).sub.n --PR.sub.3 X.sub.2 where R is a lower alkyl group, n is an integer of 2 to 6 and X is Br.sup.- or I.sup.-. The synthesis mixture has the composition:______________________________________ SiO.sub.2 /Al.sub.2 O.sub.3 = 20-250 Na.sub.2 O/SiO.sub.2 = 0.01-0.5 OH/SiO.sub.2 = 0.01-1.0 T/SiO.sub.2 = 0.01-0.2 H.sub.2 O/SiO.sub.2 = 10-40 ______________________________________whereas T means template compound.The synthesis mixture is stirred at a temperature between 90.degree. and 200.degree. C. at autogenous pressure. The aluminosilicate PZ 1 is changed into the aluminosilicate PZ 2 by treatment with dilute acids or with ammonium chloride and subsequent calcining. This aluminosilicate PZ 2 can be employed as catalyst in the conversion of alcohols into hydrocarbons.