Abstract: This invention provides a process for the regeneration and/or activation of a noble catalyst comprising contacting said catalyst with an atmosphere comprising a fluorohalocarbon and/or a fluorohydrocarbon of the formula, C.sub.n H.sub.m F.sub.p X.sub.q, wherein X is chlorine and/or bromine; n is an integer from 1 to 6; m is an integer from 0 to 6, provided that m can be no more than the total n in the compound; p and q are integers from 1-13 when the compound is acrylic and integers from 1-11 when the compound is cyclic, provided that the fluorohalocarbon and/or fluorohalohydrocarbon always contain at least one chlorine or bromine atom and provided that m+p+q=2n+2 when the compound is acrylic and that m+p+q=2n when the compound is cyclic, at a temperature in excess of 200.degree. C.

Abstract: A process for restoring deactivated catalysts containing zeolite with a noble metal of Group VIII of the Periodic Table and to be used in the production of aromatic compounds, wherein decoking of the deactivated catalysts is carried out in the presence of halogen or a halogen-containing compound. This restoration process permits effective restoration of deactivated catalysts and thus is expected to be employed in the fields of petroleum purification, petrochemistry and so forth.

Abstract: A process for reactivating a spent, metal-contaminated zeolite-containing cracking catalyst composition comprises the substantially simultaneous contacting with a fluorine compound (preferably HH.sub.4 F) and a metals passivating agent (preferably a compound of Sb or Ca). The thus reactivated cracking catalyst composition is employed in a catalytic cracking process.

Abstract: The present invention relates to a process for the regeneration and stabilization of certain phosphorus-vanadium-oxygen complex catalysts or phosphorus-vanadium-oxygen co-metal complex catalysts, with halogen-containing components and subsequently treating the catalyst with phosphorus compounds. These catalysts are useful for the manufacture of maleic anhydride from butane feedstock.

Abstract: The present invention is a process for regenerating a sulfur-contaminated, highly selective, large-pore zeolite catalyst. It comprises a multistep process involving exposure of the catalyst to a combination of oxidizing conditions, reducing conditions and treatment with a halogen acid gas. These conditions are effective to agglomerate a Group VIII metal and remove sulfur. Thereafter, the catalyst is oxychlorinated to redisperse the Group VIII metal over the catalyst surface. A carbon removal step is optionally included.

Abstract: A process is described for rejuvenation of a deactivated highly siliceous noble metal-containing zeolite catalyst which contains agglomerated noble metals. The process comprises initially reducing the deactivated catalyst in hydrogen, pretreating the thus reduced catalyst with an inert gas stream containing about 0.001 to 10 weight percent hydrogen chloride, redispersing the noble metal with an inert gas stream containing about 0.001 to 10 weight percent Cl in the form of Cl.sub.2 or Cl-containing organic material, and subsequently reducing the catalyst. The Cl-treatments may optionally occur in the presence of oxygen or sources of oxygen.

Abstract: A fluoride-containing platinum on alumina support isomerization catalyst useful for the isomerization of pentane to isopentane can be prepared by a several step treatment of substantially deactivated chloride-containing platinum on alumina support isomerization catalyst. The conversion steps include washing the chloride-containing catalyst to remove substantially all chloride ions, fluorinating the washed material with an aqueous florinating agent, then drying the fluorinated catalyst. Isomerization process employing the catalyst thus prepared is also provided.

Abstract: According to the specified process chromium oxyfluoride catalysts which have largely lost their activity are regenerated. The catalysts are mixed with magnesium oxide or magnesium hydroxide in the presence of water and converted into a paste. If necessary the mixture must be concentrated by evaporation until it exhibits the consistency of a paste. Finally the paste is dried. The paste is best converted into molded bodies such as, for example, granules before drying.

Abstract: A process is described for reactivating agglomerated iridium-containing catalysts such as Pt-Ir on Al.sub.2 O.sub.3 reforming catalyst. The agglomerated catalyst is decoked to remove carbon deposits; treated with hydrogen to reduce metal oxides to the free metals; pretreated with hydrogen halide to provide at least about a 1.3 weight percent halide content; and treated with a low mass flow rate of chlorine of about one gram chlorine per 100 grams catalyst per hour. Use of a low mass halogen flow rate significantly retards ferrous metal corrosion and significantly reduces the quantity of chlorine normally used in achieving high redispersion values.

Abstract: A process is disclosed for reactivating an agglomerated iridium-containing catalyst and particularly platinum-iridium on alumina reforming catalysts. The process includes a reducing step involving contacting a decoked agglomerated catalyst with a reducing gas such as hydrogen to reduce agglomerated iridium oxides to the free metal, a hydrogen halide pretreatment step to provide a halide level to the catalyst of about 1.3 weight percent, and an elemental halogen redispersion step. The hydrogen halide pretreatment step is performed under elemental oxygen-free conditions prior to redispersion and allows high iridium redispersion values to be obtained. If no iridium oxides are initially present, the hydrogen step is optional.

Abstract: A process is disclosed for reactivating a coked and agglomerated iridium-containing catalyst and particularly platinum-iridium on alumina reforming catalysts. The process includes a low temperature decoking step to achieve partial decoking while minimizing agglomeration, a reducing step involving contacting the decoked agglomerated catalyst with a reducing gas such as hydrogen to reduce agglomerated iridium oxides to the free metal, a halide pretreatment step to increase the chloride level of the catalyst to about 1.3 weight percent and above, and a halogen redispersion step. The redispersion step is performed with a mixture of elemental halogen and water vapor.

Abstract: A process is disclosed for reactivating agglomerated iridium-containing catalysts, in series, and particularly platinum-iridium on alumina reforming catalysts. The process includes a reducing step, involving contacting a decoked agglomerated catalyst with a reducing gas, such as hydrogen, to reduce agglomerated iridium oxides to the free metal, a halide pretreatment step to increase the halide level of the catalyst to about 1.3 weight percent and above, a halogen/water vapor redispersion step at elevated temperature and a contacting of a second catalyst, in series, with the halogen/water vapor effluent at elevated temperature to partially burn-off the carbon deposits on the catalyst surface. Utilizing the effluent halogen stream, rather than subjecting to a scrubbing operation represents a savings in process costs, minimizes pollution problems and provides additional halogen protection to subsequent catalyst reactors in the process scheme.

Abstract: Catalysts containing niobium or tantalum halides which have been deactivated by contact with oxygen are regenerated by being contacted with a halogenated hydrocarbon.

Abstract: A process is described for the redispersion of iridium-containing catalysts involving a low temperature hydrogen reduction step, i.e., from 190.degree. C. up to about 250.degree. C. after a coke burn-off. The low temperature reduction step allows milder conditions during subsequent halogen redispersion.

Abstract: A process is disclosed for re-activating a used solid acid catalyst wherein the catalyst is calcined to burn off heavy hydrocarbons and subsequently halogenated with chlorine and/or fluorine or their compounds entrained by an inert gas or a non-reducing gas. The resulting re-activated catalyst finds wide application in isomerization and oligomerization of olefins, conversion of methanol into hydrocarbons, and isomerization, disproportionation or trans-alkylation of aromatic hydrocarbons.

Abstract: This invention relates to a new process for dehydrogenating hydrocarbons utilizing a catalyst comprising a platinum group component, an alkali or alkaline earth component and a porous support material. After the catalyst is used to dehydrogenate hydrocarbons it is contacted in a catalyst regeneration zone with a halogen component to produce a regenerated catalyst containing added halogen component, which regenerated catalyst can then be reused to dehydrogenate hydrocarbons. The added halogen component increases the catalyst's activity and stability in the dehydrogenation process.

Abstract: An alpha-olefin is oligomerized in the presence of a three-component catalyst comprising a particulate solid adsorbent, boron trifluoride and elemental oxygen. The process also activates the catalyst. For example, 1-decene is oligomerized to a product predominating in the trimer and tetramer using boron trifluoride, elemental oxygen and silica as the solid adsorbent.