摘要:
A catalyst for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number from a feedstock oil having a 10 volume % distillation temperature of at least 140°C and an end point temperature of not more than 400°C, or a feedstock oil having a 10 volume % distillation temperature of at least 140°C and a 90 volume % distillation temperature of not more than 360°C, wherein the catalyst contains a crystalline aluminosilicate, gallium and/or zinc, and phosphorus, and the amount of phosphorus supported on the crystalline aluminosilicate is within a range from 0.1 to 1.9% by mass based on the mass of the crystalline aluminosilicate; and a method for producing monocyclic aromatic hydrocarbons, the method involving bringing a feedstock oil having a 10 volume % distillation temperature of at least 140°C and an end point temperature of not more than 400°C, or a feedstock oil having a 10 volume % distillation temperature of at least 140°C and a 90 volume % distillation temperature of not more than 360°C, into contact with the above-mentioned catalyst for producing monocyclic aromatic hydrocarbons.
摘要:
Process for producing ethylidenorbornene (ENB) comprising a stage of thermal cracking of DCPD to CPD carried out in an inert fluid to which it is fed a stream of DCPD comprising virgin DCPD from cracking containing up to 10% wt of tetrahydroindene (THI) and recycled DCPD containing THI coming from the subsequent stage of formation of vinylnorbornene. The contact time of DCPD with the heat transfer fluid is of few seconds and it is sufficient to achieve a conversion of said DCPD ≥ 95%, with little formation of oligomers. THI is then separated from the heat transfer fluid substantially free from DCPD and enriched in THI to a fractionation column.
摘要:
A method for thermally cracking Diels-Alder adducts and for altering organic streams containing Diels-Alder adducts using controlled cavitation conditions.
摘要:
A method of reclaiming styrene from polystyrene-containing materials wherein a solution of polystyrene from such materials in a solvent is heated in distillation equipment to depolymerize the polystyrene and produce a styrene fraction and a heavier fraction, the styrene fraction being separated from the heavier fraction. Prior to heating, an inert gas is used to purge the distillation equipment of oxygen. The method preferably is carried out at the lowest temperature which will achieve the desired rate of depolymerization.
摘要:
A method of processing polystyrene is disclosed. The method includes contacting polystyrene with an aromatic solvent at a temperature in a range of 325 to 425 °C and a pressure in a range of 50 to 300 torr to produce a gas comprising styrene monomer. The method further includes separating the styrene monomer from one or more components of the gas to form a product stream comprising styrene.
摘要:
Plastic wastes which for at least 80 wt-% contain a polymer or a mixture of polymers from a group including polymethyl methacrylate, polypropylene, polyethylene, polystyrene, polyethylene terephthalate and/or polytetrafluoroethylene, are recycled using the following steps: (i) heating the plastic wastes to a temperature at which they are flowable; (ii) pyrolyzing the flowable plastics together with a catalyst and/or an adsorber and withdrawing the resulting gases; (iii) condensing the gases.
摘要:
The present disclosure generally relates to processes, apparatuses and custom catalysts designed to depolymerize a polymer. In one embodiment, the present invention relates to a de-polymerizing apparatus, catalysts and reaction schemes to obtain useful monomers including fuel products by “in situ” reactions using coupled electromagnetic induction.