摘要:
A method of extraction of low molecular weight mercaptans from petroleum (e.g., crude oil) or gas condensate containing such mercaptans comprises (1) contacting the mercaptans with oxygen in an aqueous solution of a metal hydroxyde, in the presence of a cobalt dihalodihydroxydisulfophthalocyanine catalyst, the catalyst being used in an amount within the range of from about 0.5 x 10-5 to about 2.5 x 10-5 weight percent based on the weight of the petroleum or gas condensate, the catalyst being introduced into the crude oil or gas condensate continuously in the form of a catalytic complex in an aqueous solution of a metal hydroxide, the extraction method being conducted at a temperature ranging from about 40 to about 60 °C and a pressure ranging from about 1.0 to about 1.4 MPa, and (2) separating the petroleum or gas condensate fro m the aqueous solution of metal hydroxyde.
摘要:
A method for oxidatively breaking down organic compounds that have low biodegradability and are difficult to oxidise chemically in aqueous effluents, by using a water-soluble peroxide oxidant in the presence of a water-soluble iron or manganese metallophthalocyanine immobilised on an ionic resin consisting of a cross-linked insoluble copolymer derived from a vinylaromatic monomer comprising cationic or anionic groups. The method is particularly suitable for oxidatively decomposing polyhalogenophenols and halogenated hydrocarbons.
摘要:
L'invention concerne un procédé de désodorisation catalytique et de réduction de la teneur en azote des effluents de cuve à lisier. Le procédé comporte 3 étapes :
(a) transformation des mercaptans en disulfures et de l'hydrogène sulfuré en sulfures. (b) Post combustion catalytique des composés organiques volatils (c) Réduction catalytique des oxydes d'azote.
摘要:
Metallophthalocyanines having hydrocarbyl or other substituents on the benzene rings of the phthalocyanines, and µ-oxo dimers of metallophthalocyanines are highly active catalysts for the decomposition of hydroperoxides and for the partial oxidation of hydrocarbons.
摘要:
Stoichiometric and catalytic chemical transformations may be carried out in solution using novel fluorous multiphase systems (FMS). "Fluorous" denotes a carbon-fluorine bond rich organic molecule derived by replacing hydrogen atoms bonded to carbon atoms with fluorine. The FMS consists of a fluorous phase containing a fluorous solvent, typically a fluorocarbon or a fluorohydrocarbon (with or without substituent groups), and a reagent or a catalyst containing a sufficient number of fluorous moieties to render it preferentially soluble in the fluorous solvent and located at the interface of the fluorous and nonfluorous phases. The nonfluorous (i.e. the second) solvent, may be any known organic or nonorganic solvent(s) with limited or no solubility in the fluorous solvent that is effective for dissolving the reactants and/or separating the reaction products (e.g., a nonfluorous solvent having a Hildebrand solubility parameter of at least about 18.0 MPa ½ ). The reaction can occur simultaneously in the fluorous phase and at the interface of the phases. The FMS reagents and FMS catalysts contain sufficient number of fluorous moieties to render them preferentially soluble into the fluorous phase and at the interface without impairing the efficacy or participation of the catalyst or reagent in the reaction which is maintained in a liquid or fluid phase. The preferred fluorous moieties are linear, branched and carbocyclic fluorocarbon alkyl chains with high carbon numbers that enable the catalyst or reagent to remain fluorous-phase compatible. The fluorous moieties may also contain O, S, N, P, As and Si, that assist in rendering the catalysts and reagents fluorous phase compatible. The FMS reagents and catalysts can be prepared by (1) fluorination (i.e., replacement of C-H bonds with fluorine); (2) fluorofunctionalization, e.g., the attachment of fluorous moieties to the reagents or catalysts; or (3) by total synthesis. The fluorous multiphase systems have utility to facilitate the separation of the FMS catalyst or spent FMS reagent, which has utility in the design and synthesis of catalysts and reagents with high product selectivity, resulting in especially environmentally friendly processes.
摘要:
A cyanide-containing aqueous stream is treated to reduce the cyanide concentration by oxidation of cyanide using oxygen as the oxidizing agent under mild reaction conditions in the presence of a metal chelate catalyst. Especially effective chelates are metal phthalocyanines, particularly where the metal is vanadium or a member of the iron group metals. The oxidation can be effected homogeneously using water soluble metal chelates, or can be performed heterogeneously, especially in a continuous fashion using a packed bed reactor, by using suitable water-insoluble metal chelates, especially when supported on appropriate carriers.
摘要:
The present invention deals with a process for sweetening a sour hydrocarbon fraction containing mercaptans. The process involves contacting the hydrocarbon fraction with a catalytic composite in the presence of an oxidizing agent, ammonium hydroxide and a quaterary ammonium salt. The instant process does not use any strong base nor any alkali hydroxides to sweeten the sour hydrocarbon fraction and thus obviates waste disposal problems.
摘要:
A catalytic composite effective in oxidizing mercaptans contained in a sour petroleum distillate to disulfides comprises a metal chelate, an onium compound and optionally an alkali metal hydroxide. The onium compound may be selected from the group consisting of phosphonium, arsonium, stibonium, oxonium and sulfonium compounds, with phosphonium, oxonium and sulfonium compounds preferred. Additionally, metal phthalocyanines are a preferred class of metal chelates. An improved process for treating a sour petroleum distillate comprises using the catalytic composite described above to contact the sour petroleum distillate in the presence of an oxidizing agent at treating conditions.