Process for increasing the concentration of normal hydrocarbons in a stream

    公开(公告)号:US11479730B1

    公开(公告)日:2022-10-25

    申请号:US17718001

    申请日:2022-04-11

    申请人: UOP LLC

    摘要: A process increases the concentration of non normal paraffins in a feed stream comprising separating a naphtha feed stream into a normal paraffin rich stream and a non-normal paraffin rich stream. The non-normal paraffin rich stream is isomerized over an isomerization catalyst to convert non-normal paraffins to normal paraffins, hydrocrack C5+ hydrocarbon to C2-C4 paraffins and produce an isomerization effluent stream. The isomerization effluent stream is separated into a C3− off gas, C4 rich stream and C5+ stream that is recycled to the naphtha feed stream. A depentanizer column may be positioned to either remove C6+ from the naphtha feed stream or from a bottoms stream from a stabilizer column. The amount of C2-C4 paraffins that are provided is increased from about 55% to as much as 77% and even more with further modifications including operating at higher temperatures or increasing the volume of catalyst.

    Method of reducing octane loss in catalytic cracking of gasoline in S-zorb plant

    公开(公告)号:US20220235279A1

    公开(公告)日:2022-07-28

    申请号:US17489418

    申请日:2021-09-29

    IPC分类号: C10G11/00 G06F30/27

    摘要: The present invention discloses a method of reducing octane loss in catalytic cracking of gasoline in S-Zorb plant. The method comprises following steps: a. Collecting equipment data and adjusting differences thereamong to construct initial data sample set; b. Collating data sample set; c. Employing local linear s embedding to reduce dimension of independent variables, and trimming the independent variables to obtain reserved independent variables; d. Calculating correlation coefficients of the reserved independent variables and removing variables with too high correlation coefficients to obtain main variables; e. Constructing a BP neural network model of the main variables to obtain optimal octane loss prediction model; f. Employing the optimal octane loss prediction model to obtain a predicted optimal operating condition for each main variable. The present invention is different from traditional chemical mechanism method at aspect of building FCC technology process. For enterprises, they can employ it to analyze influencing factors of octane loss according to local conditions, and being able to reduce octane loss and improve quality of refined oil.

    Process for cracking hydrocarbon stream using flue gas from gas turbine

    公开(公告)号:US10703985B2

    公开(公告)日:2020-07-07

    申请号:US16318339

    申请日:2017-07-24

    摘要: A process for cracking a hydrocarbon stream by: combusting fuel in a gas turbine in the presence of compressed air to produce a flue gas, wherein the flue gas drives a turbine to produce electricity in a coupled generator or work to power a coupled rotating equipment; (a) feeding a first portion of the flue gas to a heat exchanger; (b) feeding ambient air to the heat exchanger to be heated by the first portion of the flue gas to provide heated air; (c) feeding a furnace with fuel and a mixture of a second portion of the flue gas and the heated air obtained by step (c) and (d) cracking the hydrocarbon stream in the furnace.

    METHOD OF PRODUCING HYDROCARBONS
    10.
    发明申请

    公开(公告)号:US20190276747A1

    公开(公告)日:2019-09-12

    申请号:US16346814

    申请日:2017-11-02

    申请人: SHELL OIL COMPANY

    摘要: A method of producing normally solid, normally liquid and optionally normally gaseous hydrocarbons involves contacting a gas mixture comprising hydrogen and carbon monoxide with a catalyst under elevated temperature and pressure, to convert at least part of the hydrogen and carbon monoxide into hydrocarbons. An effluent is withdrawn from the reactor and subjected to a separation step to form at least a heavy fraction and a light fraction. The heavy fraction comprises normally solid hydrocarbons, while the light fraction comprises unconverted syngas and normally liquid and optionally normally gaseous hydrocarbons. The light fraction is sent to a light ends stripper operating at a temperature of maximally 200° C. to obtain a hydrocarbons fraction comprising normally liquid hydrocarbons. The heavy fraction is subjected to flash evaporation or steam stripping to obtain a hydrocarbon stream of normally solid hydrocarbons (comprising mainly C10+ hydrocarbons).