摘要:
A hydrocarbon gas such as methane and LPG is desulfurized in the presence of oxygen and an oxidation catalyst to convert sulfur compounds in the gas to sulfur oxides. The sulfur oxides are then trapped downstream of the oxidation by an adsorbent. The amount of oxygen added to the hydrocarbon gas to promote oxidation is such that the sulfur compounds are selectively oxidized and the oxidation of the hydrocarbon gas is minimized to reduce hydrogen formation.
摘要:
A process comprising removing alkyl-substituted aromatic compounds, alkyl compounds, or cycloalkyl compounds from an aromatic stream containing these compounds by contacting the aromatic stream with molecular oxygen in the presence of a zeolite.
摘要:
Olefins are oxidized to carbonyl compounds, for example, 2-hexene to a mixture of 2-hexanone and 3-hexanone, with a palladium/copper/boric acid catalyst and a suitable surfactant or phase transfer agent. The reaction takes place in a diluent system comprising at least two liquid phases, wherein at least one liquid phase is an aqueous phase, and in the presence of free oxygen. The catalyst system can be used to oxidize internal olefins, as well as terminal olefins, at reasonable rates. The catalyst system can also be used for the selective oxidation of linear olefins in a mixed stream containing linear and branched olefins.
摘要:
Acetylenic compounds are selectively removed from hydrocarbon mixtures containing same by oxidation in the presence of a copper chromite catalyst. In one embodiment, acetylenic compounds are selectively removed from streams containing C.sub.4 unsaturated hydrocarbons containing same by contacting oxygen and the stream with a catalyst of copper, chromium, and oxygen under oxidizing conditions.
摘要:
A process for producing a methane-containing gas mixture includes the steps of: (i) passing a first feed gas mixture including hydrogen and carbon dioxide through a bed of methanation catalyst to react a portion of the hydrogen with at least a portion of the carbon dioxide and form a methane-containing gas mixture containing residual hydrogen, (ii) adding an oxygen-containing gas to the methane-containing gas mixture containing residual hydrogen to form a second feed gas mixture, and (iii) passing the second feed gas mixture through a bed of an oxidation catalyst to react the residual hydrogen and oxygen to form a hydrogen depleted methane-containing gas mixture.
摘要:
The present invention relates to a method for purifying a compound selected from a compound represented by the following general formula [1] or [2], a saturated aliphatic hydrocarbon having no substituent, or kerosene: (R represents a halogen atom or a lower alkyl group having 1 to 3 carbon atoms, and n represents an integer of 1 to 5); (R is the same as above, p and q independently represent an integer of 0 to 4, with the proviso that at least one of p and q is not 0), comprising: removing a impurity contained in said compound by a first step comprising contacting said compound with ozone gas, and then a second step comprising contacting said compound with an adsorbent selected from zeolite or a basic adsorbent.
摘要:
A process is disclosed for the separation and removal of hydrogen, alone or together with carbon monoxide, from a mixture of these gases with olefinic hydrocarbons by contacting the mixture with oxygen over a catalyst at conditions sufficient to oxidize the hydrogen to form water while suppressing reaction of the reactive, unsaturated hydrocarbons. The catalyst contains at least one metal or metal oxide from Groups Ib, IIb, IIIa, IVa and Va of the Periodic Table, and the temperature of the reaction may range from about 40.degree. C. to 300.degree. C. and a pressure of about 14.7 psig to 1,000 psig, and the flow rate of the entering feed ranges from about 1 GHSV to about 50,000 GHSV. The process can be conducted using one, two or three reaction zones.
摘要:
A method for the separation of methane from a gaseous mixture containing methane and at least one of ethane and propane which comprisesA. simultaneously passing said gaseous mixture and oxygen over a catalyst comprising platinum on an active carbon carrier;B. selectively oxidizing the ethane and propane in said gaseous mixture at a temperature of about 170.degree. C andC. recovering methane from said mixture.