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    PYROLYTIC EXTRACTION OF HYDROCHLORIC ACID FROM MAGNESIUM SALT MIXTURES, ESPECIALLY BITTERNS
    1.
    发明公开
    PYROLYTIC EXTRACTION OF HYDROCHLORIC ACID FROM MAGNESIUM SALT MIXTURES, ESPECIALLY BITTERNS 审中-公开

    公开(公告)号：US20240002227A1

    公开(公告)日：2024-01-04

    申请号：US18255561

    申请日：2021-11-03

    Applicant: LUNA INNOVATIONS INCORPORATED

    Inventor： Matthew MERRILL ,  Greg SIMMS

    IPC: C01B7/07 ,  C01D3/08 ,  C01F5/30

    CPC classification number: C01B7/0737 ,  C01D3/08 ,  C01F5/305

    Abstract: Processes are provided which pyrolytically extract hydrochloric acid from a magnesium ion-rich salt mixture. In this regard, a supply of the magnesium ion-rich salt mixture (e.g., bittern) may be directed to a pyrolytic chamber where it is contacted with heated gas (e.g., combustion flue gas) at a sufficient temperature and for a sufficient time to form a vapor product stream comprised of hydrochloric acid and an insoluble pyrolyzed mixed salt stream comprised of magnesium hydroxide and sodium sulfate decahydrate. The solid pyrolyzed mixed salt stream may be separated into separate product streams comprising the insoluble magnesium hydroxide and remaining soluble salt fractions, while the vapor product stream of hydrochloric acid from the pyrolytic chamber may be condensed form an aqueous HCl solution. The magnesium ion rich salt mixture may be dehydrated prior to pyrolysis to achieve magnesium ions in a tetrahydrate state or lower (e.g., a monohydrate to a trihydrate state).

    HIGH PRESSURE DESORPTION OF HYDROGEN CHLORIDE GAS
    2.
    发明公开
    HIGH PRESSURE DESORPTION OF HYDROGEN CHLORIDE GAS 审中-公开

    公开(公告)号：US20230331551A1

    公开(公告)日：2023-10-19

    申请号：US18006457

    申请日：2021-07-20

    Applicant: SGL CARBON SE

    Inventor： Christian WOLTZ ,  Kenneth CHULACK ,  Odon ANGELES

    IPC: C01B7/07 ,  B01D3/06

    CPC classification number: C01B7/0706 ,  B01D3/06 ,  C01B2210/0025

    Abstract: A method for producing a hydrogen chloride. A pressurized highly concentrated hydrochloric acid having a hydrogen chloride concentration of 35% by weight or above is fed into a high pressure desorption device, the high pressure desorption device is operated at a pressure Pdes of 2 bar or above and at a temperature T from 110 to 200° C. in the bottom of the high pressure desorption device, and the hydrogen chloride is desorbed in the high pressure desorption device.

    Method and a system for producing hydrochloric acid from flue gases
    3.
    发明授权
    Method and a system for producing hydrochloric acid from flue gases 有权

    公开(公告)号：US11376546B2

    公开(公告)日：2022-07-05

    申请号：US17273640

    申请日：2019-09-24

    Applicant: Valmet Technologies Oy

    Inventor： Risto Hämäläinen ,  Tarja Korhonen ,  Naveen Chenna ,  Lauri Kokko

    IPC: F23J15/04 ,  C01B7/07 ,  C01B7/03 ,  B01J8/00 ,  B01D53/86 ,  B01D53/14

    Abstract: A method for producing aqueous hydrochloric acid from flue gases is provided. The method comprises conveying water to a first scrubber (102, 202, 302, 402, 502, 602, 702) or to a line (112b, 212b, 312b, 412b, 512b, 712b, 712c) to use the water in a scrubbing liquid of the first scrubber. The method also comprises providing flue gas containing chlorides into the first scrubber (102, 202, 302, 402, 502, 602, 702) and scrubbing the flue gas containing chlorides with the scrubbing liquid by contacting the flue gas with the scrubbing liquid in the first scrubber (102, 202, 302, 402, 502, 602, 702). Dilute hydrochloric acid and a flue gas derivate (104, 204, 304, 404, 504, 704) are produced. The method comprises letting out at least some of the dilute hydrochloric acid from the first scrubber (102, 202, 302, 402, 502, 602, 702) as a scrubber bleed, separating solids suspended by the scrubber bleed in a solids separator (192, 592, 692), conveying the scrubber bleed from the solids separator (192, 592, 692) into an evaporation vessel (194, 594, 694) and concentrating the scrubber bleed in the evaporation vessel (194, 594, 694) to produce hydrochloric acid vapor having a concentration of 5-22 wt-%. A corresponding system is also provided.

    Process for purifying a contaminated hydrochloric acid composition
    4.
    发明授权
    Process for purifying a contaminated hydrochloric acid composition 有权

    公开(公告)号：US11352255B2

    公开(公告)日：2022-06-07

    申请号：US16466990

    申请日：2017-12-11

    Applicant: Avantium Knowledge Centre B.V.

    Inventor： Benjamin McKay ,  Johannes Hendrick Vleeming ,  Wei Zhao

    IPC: C01B7/07 ,  C01B7/01 ,  C07H1/00

    Abstract: A purified hydrochloric acid composition is prepared from a stream of a contaminated hydrochloric acid composition by a process comprising a distillation treatment, wherein at least a first distillation column is operated at a first pressure and a second distillation column is operated at a second pressure, which second pressure is lower than the first pressure; wherein the contaminated hydrochloric acid composition comprises water, contaminants and hydrochloric acid in a first hydrochloric acid concentration of above the azeotropic composition of hydrochloric acid and water at the first pressure; wherein a part of the stream of the contaminated hydrochloric acid composition is fed into the first distillation column to yield a first bottom product comprising water and hydrochloric acid with a hydrochloric acid concentration below the first hydrochloric acid concentration and a first top product comprising hydrochloric acid in a concentration above the azeotropic hydrochloric acid composition at the first pressure; wherein at least a portion of the first bottom product is passed to the second distillation column; wherein another part of the stream of the contaminated hydrochloric acid composition is fed into the second distillation column to yield a second top product comprising contaminants and water, and a second bottom product comprising water and hydrochloric acid; wherein at least a part of the second bottom product is recycled into the first distillation column; and wherein the first top product is recovered as purified hydrochloric acid composition.

    HYDROGEN CHLORIDE LOOP FUEL REACTION
    5.
    发明申请
    HYDROGEN CHLORIDE LOOP FUEL REACTION 有权

    公开(公告)号：US20220073347A1

    公开(公告)日：2022-03-10

    申请号：US17362539

    申请日：2021-06-29

    Applicant: John R. CALLAWAY

    Inventor： John R. CALLAWAY

    IPC: C01B7/01 ,  C01B7/07 ,  F23K5/00 ,  F23M20/00

    Abstract: A hydrogen chloride loop fuel reaction is designed and configured for turbine/generator combination which can be used for automotive propulsion or as a standalone electrical generation or for auxiliary equipment. A method for providing a hydrogen chloride loop fuel reaction includes creating hydrogen chloride fuel in a sealed furnace vessel, wherein at start up, the sealed furnace vessel is vacuumed out and hydrogen and chlorine are injected into a burner and ignited resulting in the hydrogen chloride fuel in an exhaust stream of the sealed furnace vessel; and looping the hydrogen chloride fuel leaving the sealed furnace vessel in the exhaust stream of the sealed furnace vessel.

    Process for providing hydrogen chloride for chemical reactions
    9.
    发明授权
    Process for providing hydrogen chloride for chemical reactions 有权

    公开(公告)号：US10815193B2

    公开(公告)日：2020-10-27

    申请号：US15736427

    申请日：2016-06-27

    Applicant: Covestro Deutschland AG

    Inventor： Jan Busch ,  Jürgen Arras ,  Christian Steffens

    IPC: C07C263/10 ,  C01B7/07 ,  C01B7/04 ,  C07C17/02 ,  B01D5/00 ,  B01D3/14 ,  B01L3/14

    Abstract: The invention relates to an improved process for making available the coproduct hydrogen chloride obtained in the preparation of an isocyanate by phosgenation of the corresponding amine for a desired subsequent use (i.e. a chemical reaction), in which part of the total hydrogen chloride obtained is isolated in gaseous form at a pressure which is higher than the pressure desired for the subsequent use of the hydrogen chloride by lowering the pressure of the crude product from the phosgenation and the remaining part of the total hydrogen chloride obtained is separated off at a pressure lower than that desired for the subsequent use from the liquid crude product from the phosgenation remaining after lowering of the pressure and is subsequently compressed to a pressure which is higher than that desired for the subsequent use, and in which the two hydrogen chloride streams obtained in this way are, preferably together after having been combined, purified so as to give a purified hydrogen chloride at a pressure which is higher than the pressure desired for the subsequent use.

    Hydrochloric acid purification process and plant
    10.
    发明授权
    Hydrochloric acid purification process and plant 有权

    公开(公告)号：US10576417B2

    公开(公告)日：2020-03-03

    申请号：US16096307

    申请日：2017-04-11

    Applicant: Arkema France

    Inventor： Marianne Launay ,  Irene Emery ,  David Jean-Leopold Bidet

    IPC: B01D53/68 ,  B01D53/70 ,  C01B7/07 ,  C07C17/389

    Abstract: Disclosed is a process for treating a gas stream containing hydrochloric acid, hydrofluoric acid, a fluorinated compound and halogenated organic compounds, wherein the gas stream is subjected to: (a) a step of washing with an acid solution to obtain a washed gas stream; (b) a step of adiabatic absorption in an aqueous solution of the hydrochloric acid contained in said washed gas stream, to collect a solution of hydrochloric acid; (c) a step of adsorption on activated carbon of the impurities present in said hydrochloric acid solution, to obtain a purified hydrochloric acid solution and a gas stream containing said fluorinated compound; and (d) a step of bringing said purified hydrochloric acid solution into contact with a silica gel. Also disclosed is a plant for the implementation of this process, and also a process for preparing a fluorinated compound comprising the catalytic pyrolysis of an organofluorine compound.

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