摘要:
The amount of oxygen-containing impurities in an organic composition is reduced at an elevated temperature by contact with a supported metal oxide. For example, the amount of oxygen-containing organic impurities in a crude stilbene product obtained by oxidatively dehydrocoupling toluene using a solid oxidant is decreased by contact with zinc oxide supported on alumina at an elevated temperature and the resulting purified stilbene product is reacted with ethylene to form styrene.
摘要:
The amount of oxygen-containing impurities in an organic composition is reduced at an elevated temperature in the presence of steam using a catalyst comprising a Group VIb or Group VIII metal oxide or phosphate. For example, the amount of oxygen-containing organic impurities in a crude stilbene product obtained by the oxidative dehydrocoupling of toluene is catalytically reduced at high temperatures in the presence of steam and an iron oxide catalyst and the resulting stilbene product is reacted with ethylene to form styrene.
摘要:
The conversion of hydrocarbons in the presence of hydrogen occurs under hydrocarbon conversion conditions in the presence of a subgroup of a certain class of metal-substituted semi-crystalline aluminosilicates which are synthetic and which are predominantly ordered in two directions, that is, which are laminar or have a layered or stacked sheet structure. The metal substituted for the aluminum in the trioctahedral sites is nickel, cobalt, or mixtures thereof. The catalysts are preferably used in hydroisomerization and hydrocracking processes.
摘要:
The conversion of hydrocarbons in the presence of hydrogen occurs under hydrocarbon conversion conditions in the presence of a subgroup of a certain class of metal-substituted semi-crystalline aluminosilicates which are synthetic and which are predominantly ordered in two directions, that is, which are laminar or have a layered or stacked sheet structure. The metal substituted for the aluminum in the trioctahedral sites is nickel, cobalt, or mixtures thereof. Hydrocarbon conversion catalysts are also claimed comprising the metal-substituted laminar 2:1 layer lattice aluminosilicate minerals containing in addition a hydrogenation component such as palladium. The catalysts are preferably used in hydroisomerization and hydrocracking processes.
摘要:
The conversion of carbon monoxide and hydrogen to produce methane is catalyzed by a layered complex metal silicate composition characterized as having repeating units of the structural formula[(1-x)Ni.sup.a + xRu.sup.b ].sub.n (OH).sub.4 Si.sub.2 O.sub.5.wH.sub.2 Owhere x is a number from 0 to 1, this number expressing the atomic fraction of the metals nickel and ruthenium, a is the valence of nickel, b is the valence of ruthenium, n is a number equal in value to that defined by the ratio6/[a(1-x) + bx]And w is a number ranging from 0 to 4. Nickel chrysotile is the preferred catalyst.
摘要翻译:通过层状复合金属硅酸盐组合物催化一氧化碳和氢气转化产生甲烷的催化剂,其特征在于具有结构式[(1-X)N y + x(OH)4 Si 2 O 5·wH 2 O的重复单元,其中x是数 从0到1,这个数字表示金属镍和钌的原子分数,a是镍的化合价,b是钌的化合价,n是数值等于6 / [A( 1-X)+ BX],W是从0到4的范围。镍温石棉是优选的催化剂。
摘要:
A silica-based particulate material that may contain less than 5 wt. % of a multivalent cation and a method of preparing such a silica-based particulate material. The silica-based particulate material may be characterized as having a median particle size of at least 20 μm, a BET surface area of at least 90 m2/g, and a pH of at least 9.5; or as having a median particle size of up to 20 μm and a pH of at least 10. The silica-based particulate material may be used to make hydrophobic silica-based particulates, which may be characterized as having a pH of at least 10.5.
摘要:
Describes a free flowing particulate composition comprising, in combination, particulate amorphous precipitated silica, e.g., in the form of granules, hydrocarbon process oil, e.g., an aromatic process oil, and organic carboxylic acid having from 2 to 30 carbon atoms, e.g., stearic acid. The hydrocarbon process oil and organic carboxylic acid are sorbed on the silica and are present in amounts sufficient to measurably improve the dispersibility of the particulate amorphous precipitated silica into an elastomer as measured by percent white area. Optionally, an organosilane coupling agent may also be present in said composition. The free flowing particulate composition of the present invention is useful in reinforcing elastomers, e.g., rubbers used in vehicle tires and the soles of athletic foot wear.
摘要:
Amorphous precipitated silica is characterized by a standard white area of less than 0.8 percent. The low standard white area is a characteristic of the silica which is indicative of high (i.e., very effective) dispersion when the silica is incorporated into organic rubber compositions which are cured. Cured organic rubber compositions comprising amorphous precipitated silica exhibit low white areas which indicate high dispersion of the silica in the compositions.
摘要:
A process for producing aliphatic amines which comprises reacting an aliphatic alcohol or an aliphatic aldehyde with an aminating agent selected from the group consisting of ammonia, a primary amine and a secondary amine in the liquid phase in the presence of an unsupported catalyst consisting essentially of (1) copper oxide or copper hydroxide (2) nickel oxide or nickel hydroxide, and, optionally, (3) an oxide or an hydroxide of a Group II A metal.
摘要:
A three-component catalyst is prepared comprising a particulate silica adsorbent with boron trifluoride and water adsorbed on the silica. The silica-water-boron trifluoride catalyst is used in hydrocarbon conversion reactions such as the oligomerization of 1-decene to a product predominating in the trimer and tetramer.