Light olefin production via an integrated steam cracking and hydrocracking process

    公开(公告)号:US10899979B2

    公开(公告)日:2021-01-26

    申请号:US16638896

    申请日:2018-08-14

    Abstract: A process for producing olefins comprising introducing a steam cracker feed to a liquid steam cracker furnace section to produce a steam cracker product comprising olefins, and wherein an amount of olefins in the steam cracker product is greater than in the steam cracker feed; separating the steam cracker product in a separation unit into a hydrogen stream, a methane stream, an olefin gas stream (ethylene and propylene), a saturated gas stream (ethane and propane), a hydrocarbons gas stream (C4-5 hydrocarbons), an aromatics stream (C6-8 aromatic hydrocarbons), a raffinate stream (C6-8 non-aromatic hydrocarbons), and a heavies stream (C9+ hydrocarbons); feeding the hydrocarbons gas stream and hydrogen to one or more hydroprocessing reactors to produce a hydrocracking product comprising ethane and propane; and recycling the hydrocracking product and the saturated gas stream to the liquid steam cracker furnace section.

    PROCESS FOR PRODUCING BENZENE FROM C5-C12 HYDROCARBON MIXTURE

    公开(公告)号:US20170121239A1

    公开(公告)日:2017-05-04

    申请号:US15318154

    申请日:2015-06-01

    Abstract: The present invention relates to a process for producing benzene comprising the steps of: a) separating a source feedstream comprising C5-C12 hydrocarbons including benzene and alkylbenzenes into a first feedstream comprising a higher proportion of benzene than the source feedstream and a second feedstream comprising a lower proportion of benzene than the source feedstream and subsequently, b) contacting the first feedstream in the presence of hydrogen with a first hydrocracking catalyst comprising 0.01-1 wt-% hydrogenation metal in relation to the total catalyst weight and a zeolite having a pore size of 5-8 Å and a silica (SiO2) to alumina (Al2O3) molar ratio of 5-200 under first process conditions to produce a first product stream comprising benzene, wherein the first process conditions include a temperature of 425-580° C., a pressure of 300-5000 kPa gauge and a Weight Hourly Space Velocity of 0.1-15 h−1, and c) contacting the second feedstream with hydrogen under second process conditions to produce a second product stream comprising benzene, wherein i) the second process conditions are suitable for hydrocracking and step (c) involves contacting the second feedstream in the presence of hydrogen with a second hydrocracking catalyst comprising 0.01-1 wt-% hydrogenation metal in relation to the total catalyst weight and a zeolite having a pore size of 5-8 Å and a silica (SiO2) to alumina (Al2O3) molar ratio of 5-200 under the second process conditions which include a temperature of 300-600° C., a pressure of 300-5000 kPa gauge and a Weight Hourly space Velocity of 0.1-15 h−1, ii) the second process conditions are suitable for toluene disproportionation and involve contracting the second feedstream with a toluene disproportionation catalyst, or iii) the second process conditions are suitable for hydrodealkylation.

    Selective hydrogenolysis integrated with MTBE production

    公开(公告)号:US11603344B2

    公开(公告)日:2023-03-14

    申请号:US17262287

    申请日:2019-09-17

    Abstract: A process for producing methyl tert-butyl ether (MTBE) comprising introducing a butane feed stream (n-butane, i-butane) and hydrogen to a hydrogenolysis reactor comprising a hydrogenolysis catalyst to produce a hydrogenolysis product stream comprising hydrogen, methane, ethane, propane, i-butane, and optionally n-butane; separating the hydrogenolysis product stream into a first hydrogen-containing stream, an optional methane stream, a C2 to C3 gas stream (ethane, propane), and a butane stream (i-butane, optionally n-butane); feeding the butane stream to a dehydrogenation reactor to produce a dehydrogenation product stream, wherein the dehydrogenation reactor comprises a dehydrogenation catalyst, and wherein the dehydrogenation product stream comprises hydrogen, i-butane, and isobutylene; and feeding the dehydrogenation product stream and methanol to an etherification unit to produce an unreacted methanol stream, an unreacted isobutylene stream, and an MTBE stream.

    SYNTHESIS OF PLATE-LIKE SAPO-34 CRYSTALS
    18.
    发明申请

    公开(公告)号:US20190070597A1

    公开(公告)日:2019-03-07

    申请号:US15767192

    申请日:2016-09-20

    Abstract: Disclosed is a SAPO-34 molecular sieve having platelet morphology with the smallest dimension on the order of a few nanometers. Also disclosed are methods and systems of using said molecular sieve for catalyzing the reaction of alkyl halides to light olefins. These methods and systems have been shown to have maximum combined selectivity of ethylene and propylene of at least 90% or ranging from 90% to 98%.

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