摘要:
The disclosure concerns systems and methods for the production of phenol and acetone from cumene oxidation products. One method comprises reacting cumene and an oxidizing agent to produce a cumene oxidation product comprising cumene hydroperoxide and dimethyl benzyl alcohol, converting at least a portion of the dimethyl benzyl alcohol to cumene hydroperoxide by reacting the at least a portion of the dimethyl benzyl alcohol with hydrogen peroxide in both an organic phase and an aqueous to produce a converted cumene oxidation product, and cleaving the converted cumene oxidation product to produce an output product comprising one or more of phenol, acetone, and alpha-methylstyrene.
摘要:
A method for oxidizing a hydrocarbon includes feeding an oxidant to a top portion of a reactor; reacting the hydrocarbon with the oxidant in the reactor to obtain a reaction product stream, the reaction product stream exiting a reactor outlet at a bottom portion of the reactor; and recycling a portion of the reaction product stream to the top portion of the reactor; and introducing the oxidant into an oxidation liquid comprising the portion of the reaction product stream recycled to the top portion of the reactor to form a reaction media stream entering a reactor inlet at the top portion of the reactor. A pressure of the reactor outlet exceeds a pressure of the reactor inlet by at least 5%. The reaction media stream moves vertically downwards in the reactor.
摘要:
A method of producing phenol and acetone can comprise: alkylating benzene with a C 2-6 alkyl source in the presence of a zeolite catalyst to produce a C 8-12 alkylbenzene; oxidizing the C 8-12 alkylbenzene in the presence of an oxygen containing gas to produce a C 8-12 alkylbenzene hydroperoxide; cleaving decomposing the C 8-12 alkylbenzene hydroperoxide in the presence of an acid catalyst to produce phenol, a C 3-6 ketone, and undesirable side products such as, but not limited to acetaldehyde, DMBA, acetophenone, AMS, AMS dimers, unidentified heavies, or a combination comprising at least one of the foregoing; and monitoring a concentration of the C 8-12 alkylbenzene hydroperoxide in a process stream of a reactor in real time at a temperature and a pressure of the process stream; and in real time, controlling a parameter of the reactor and/or the cleaving decomposing in response to the concentration of the C 8-12 alkylbenzene hydroperoxide.
摘要:
The disclosure concerns methods comprising forming a phenol and acetone mixture from decomposition of a cumene hydroperoxide or a phenol, acetone, and AMS from the decomposition of a mixture containing dicumyl peroxide in a system comprising one or more reactors where at least a portion of an inner surface of the one or more reactors has a polymer coating and wherein the coating inhibits build-up of a fouling precipitate on the coated inner surface of the one or more reactors as compared to such build-up in the absence of the coating.
摘要:
A method for the manufacture of a sulfonated phenol for use as a cumene hydroperoxide decomposition catalyst can comprise: combining phenol and a sulfonating agent at a first temperature that is 1 º C to 15 º C higher than a melting temperature of the phenol, to form a reaction mixture at the first temperature; reducing the first temperature of the reaction mixture to a second temperature that is 10 to 40°C lower than the first temperature; and forming the sulfonated phenol at the second temperature.
摘要:
An apparatus for oxidation of a C 8 -C 12 alkylbenzene reactant to a C 8 -C 12 alkylbenzene hydroperoxide product, the reactor can comprise: a flow reactor comprising a reactant inlet, an oxidate product outlet, wherein the reactor is configured to provide a liquid flow from the reactant inlet to the product outlet, a gas inlet configured to introduce an oxygen-containing gas into the reactor, and an inlet sparger configured to flow gas bubbles comprising the oxygen-containing gas within the liquid flow, and wherein: the inlet sparger is configured to flow the gas bubbles having a diameter of 1.0 mm to 5.0 mm over a gas bubble residence time from 1 to 200 seconds, and/or the inlet sparger configured to flow the gas bubbles such that greater than or equal to 80% of the gas bubbles do not coalesce into larger bubbles over a gas bubble residence time of 1 to 200 seconds.