Abstract:
A novel crystalline zeolite composition is prepared by conducting the hydrothermal crystallization and, preferably, a preliminary aging step, at high pressure, i.e. pressures in excess of 20,000 psig (ca 138 MPa) and preferably above about 40,000 psig (ca 276 MPa megaPascals). The crystalline zeolite, designated zeolite HP, has a higher aluminum content than zeolite X and a lattice constant of above 24.94 A up to 25.10 A.
Abstract:
A novel crystalline zeolite composition is prepared by conducting the hydrothermal crystallization and, preferably, a preliminary aging step, at high pressure, i.e. pressures in excess of 20,000 psig (ca 138 MPa) and preferably above about 40,000 psig (ca 276 MPa megaPascals). The crystalline zeolite, designated zeolite HP, has a higher aluminum content than zeolite X and a lattice constant of above about 25.02 A.
Abstract:
Alkylaromatic charge hydrocarbons such as toluene are steam dealkylated in the presence of catalyst which typically contains oxides of nickel, chromium, and potassium on an activated high-purity alumina. It is a feature of this invention that the high-purity alumina is activated by calcining followed by addition thereto of alkaline earth metal such as calcium or magnesium. A test is disclosed according to which it may be determined which high-purity aluminas are suitable for use.
Abstract:
An amorphous powder useful as a precursor for the preparation of crystalline aluminosilicates is prepared by forming a sodium aluminum silicate water mixture whose composition falls within specified ranges for forming sodium zeolite A. By dehydrating the mixture with a water miscible solvent prior to aging and crystal formation, an amorphous powder is recovered for future use. Upon subsequent treatment the amorphous powder can be converted to crystalline aluminosilicates including type 3A, 4A, 5A, X and Y.
Abstract:
A process for the hydroisomerization of paraffinic hydrocarbons employing a catalyst composed of a noble metal, alumina and chlorine. The catalyst is prepared by treating a composite of noble metal and alumina with an aluminum compound such as an inorganic or organic salt of aluminum, preferably aluminum nitrate, calcining the treated composite and thereafter contacting the treated composite with a conventional chloride activating agent. By treating and calcining the composite with an aluminum salt, the amount of noble metal retained on the catalyst's surface during chloride activation is maximized enabling high conversions of normal paraffins to isoparaffins to be realized.
Abstract:
Alumina, derived as by-product of the Zeigler-catalyzed higher alcohol process, is converted to beta alumina trihydrate and alpha alumina trihydrate in controlled proportions and thence to the catalytic transition aluminas.
Abstract:
Disclosed is a shaped catalyst composed of finely divided particles of binary or ternary boride compounds having the general formula M.sub.x B.sub.y or M.sub.x B.sub.y R.sub.2 wherein x is an integer from 1-5; y is an integer from 1-2; z is an integer from 1-4; B is boron; M is an element selected from the groups II-A, III-B, IV-B, V-B, VI-B, VII-B, VIII, III-A, IV-A, and V-A of the Periodic Table, the rare earths, and the actinides; R is an element different from M selected from the same group of elements in the Periodic Table as M; the particles being bonded by 1 to 10% by weight of finely divided particles of preoxidized aluminum, zinc, or magnesium. The preferred catalyst materials are those boron-containing substances which are substantially insoluble in the reaction mixture containing the organic hydroperoxides olefins and products and which are bonded by heat treated aluminum particles having an oxide coating constituting from 5 to 10 percent of the particles.Also disclosed is a method for the liquid phase epoxidation of an olefinic compound with an organic hydroperoxide at temperatures of about 90.degree. to 130.degree. C at a pressure sufficient to maintain the mixture substantially in liquid phase in the presence of a catalytically effective amount of the novel catalyst material.
Abstract translation:公开了一种成形催化剂,其由具有通式M x B y或M x B y R 2的二元或三元硼化物的细碎颗粒组成,其中x为1-5的整数; y是1-2的整数; z是1-4的整数; B是硼; M是选自元素周期表II-A,III-B,IV-B,VB,VI-B,VII-B,VIII,III-A,IV-A和VA中的元素,稀土 ,和锕系元素; R是与M相同的元素周期表中选择的不同于M的元素; 颗粒通过预氧化的铝,锌或镁的细碎颗粒1-10%重量的比例粘合。 优选的催化剂材料是在含有有机氢过氧化物烯烃和产物的反应混合物中基本上不溶的含硼物质,它们通过具有构成颗粒的5-10%的氧化物涂层的热处理的铝颗粒结合。
Abstract:
A novel crystalline zeolite composition is prepared by conducting the hydrothermal crystallization and, preferably, a preliminary aging step, at high pressure, i.e. pressures in excess of 20,000 psig (ca 138 MPa) and preferably above about 40,000 psig (ca 276 MPa megaPascals). The crystalline zeolite, designated zeolite HP, has a higher aluminum content than zeolite X and a lattice constant of above about 25.02 A.
Abstract:
An enhanced oil recovery method comprising injecting an aqueous solution of ammonium salts selected from the group consisting of ammonium sulfite, ammonium bisulfite, and mixtures thereof into a petroleum-bearing earth formation, heating said injected aqueous solution to a temperature in the range of about 120.degree.-300.degree. F., or higher in the presence of said petroleum-bearing earth formation, flowing said heated aqueous solution through said petroleum bearing earth formation to drive petroleum to a recovery well, and producing increased amounts of petroleum from said earth formation through said recovery well.
Abstract:
Isobutane is self-alkylated to an alkylate composition having high octane components including trimethylpentanes in the presence of a solid catalyst and a minor amount of a C.sub.5 and higher olefin. The self-alkylation process utilizes a chlorided alumina catalyst having from about 4 to 15 weight percent chlorine. The olefins of choice employed in the isobutane self-alkylation reaction are isoolefins having 6 or 7 carbons. The isobutane may be derived from the isomerization of n-butane and the isomerization process may be integrated with the self-alkylation process.