摘要:
Dicarboxylic aromatic acids containing impurities such as aldehydes may be purified by treating the acids at an elevated temperature in the presence of a catalyst containing metallic rhenium whereby the impurities may be removed and the purified acids recovered.
摘要:
Tertiary amines may be prepared by reacting an aldehyde, hydrogen and a nitrogen-containing compound such as ammonia, a primary amine or a secondary amine in the presence of a rhodium- or ruthenium-containing catalyst at temperatures in the range of from about 50.degree. to about 350.degree. C. and a pressure in the range of from about 10 to about 300 atmospheres.
摘要:
Amines, which may be utilized in various chemical processes, may be prepared in a combination process wherein the product mixture resulting from the dehydrogenation of a paraffin feed stock may be reacted with a nitrogen-containing compound, carbon monoxide and hydrogen, without separating the olefins in the product mixture, in the presence of certain catalytic compositions of matter to prepare the aforesaid amines.
摘要:
Cyclohexene may be produced from phenylcyclohexane by treating the latter compound at an elevated temperature in the presence of certain solid acidic catalysts such as zeolite or silica-alumina to produce the desired compound.
摘要:
A novel catalyst and the use thereof in a reforming process is disclosed. The dual-function catalyst comprises a refractory inorganic oxide, indium, Group IVA(IUPAC 14) metal, and a platinum-group metal concentrated in the surface layer of each catalyst particle. Utilization of this catalyst in the conversion of hydrocarbons, especially in reforming, results in significantly improved selectivity to the desired gasoline or aromatics product.
摘要:
A novel catalyst and the use thereof in a reforming process is disclosed. The dual-function catalyst comprises a refractory inorganic oxide, indium, Group IVA(IUPAC 14) metal, and a platinum-group metal concentrated in the surface layer of each catalyst particle. Utilization of this catalyst in the conversion of hydrocarbons, especially in reforming, results in significantly improved selectivity to the desired gasoline or aromatics product.
摘要:
Methane is upgraded to higher molecular weight hydrocarbons in a process using a novel catalyst comprising boron, tin and zinc. The feed admixture also comprises oxygen. The novel catalyst may comprise one or more Group I-A or II-A elements, preferably potassium.
摘要:
A novel dehydrogenation process is disclosed which utilizes a catalyst comprising a platinum group component, a component selected from the group comprising scandium, yttrium, lanthanum, and actinium, a component selected from the group comprising tin, lead, and germanium, less than 0.3 wt. % of a halogen component, and an optional Group IA or IIA component, all on a refractory inorganic oxide support.
摘要:
An alkylation-transalkylation process for the production of a monoalkylated aromatic compound is disclosed which maximizes the production of desirable monoalkylaromatic compounds, while limiting transalkylation catalyst deactivation. The process entails the combination of an alkylation reaction zone, a first seperation zone, a second separation zone, and a transalkylation reaction zone wherein the alkylation catalyst and transalkylation catalyst are dissimilar and where the alkylation catalyst is comprised of phosphoric acid material and the transalkylation catalyst is comprised of a crystalline aluminosilicate material. The transalkylation catalyst deactivation is reduced by transalkylating only dialkylated aromatic compounds. Additionally, the transalkylation catalyst is regenerable utilizing a hot liquid hydrocarbon wash.
摘要:
A novel catalytic composite comprising a platinum group metal component; a modifier metal component selected from the group consisting of a tin component, germanium component, rhenium component and mixtures thereof; an optional alkali or alkaline earth metal component or mixtures thereof, an optional halogen component, and an optional catalytic modifier component on a refractory oxide support having a nominal diameter of at least about 850 microns. The distribution of the platinum group metal component is such that the platinum group component is surface-impregnated where substantially all of the platinum group metal component is located at most within a 400 micron exterior layer of the support. The effective amount of the modifier metal component is uniformly dispersed throughout the refractory oxide support. The distribution of the surface-impregnated platinum metal component is such that the novel catalyst has particular utility as a hydrocarbon dehydrogenation catalyst in a hydrocarbon dehydrogenation process.