中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

215 records (took 0.03 seconds)

    CATALYST-FREE METHOD FOR DEGRADING DIOXANE IN ALKYL ETHER SULFATE VACUUM REMOVAL WATER
    42.
    发明申请
    CATALYST-FREE METHOD FOR DEGRADING DIOXANE IN ALKYL ETHER SULFATE VACUUM REMOVAL WATER 有权

    公开(公告)号：US20230116436A1

    公开(公告)日：2023-04-13

    申请号：US18078251

    申请日：2022-12-09

    Applicant: Stepan Company

    Inventor： Matthew V. Vollmer ,  Donald E. Oulman ,  Aaron Brown ,  Dennis Smith ,  Doug Gustafson ,  Terry Applebury

    IPC: C02F1/72 ,  C02F1/78 ,  C02F1/42 ,  C02F1/28 ,  C02F1/02

    Abstract: A method of degrading 1,4-dioxane in the wastewater produced during the manufacture of alkyl ether sulfates is disclosed. The method includes the steps of (a) mixing from 100 to 10,000 ppm, preferably 1,000 to 4,000 ppm of ozone with the wastewater; (b) introducing H2O2 into the wastewater in an amount of 0.01 to 10, preferably 0.1 to 0.5 molar equivalents of H2O2 to ozone, and (c) mixing the ozone, H2O2, and wastewater to generate hydroxyl radicals reactive with the 1,4-dioxane, without the addition of a metal catalyst. The hydroxyl radicals react with the 1,4-dioxane and degrade it into carbon dioxide, water and/or carbonate. The method is effective to reduce a concentration of 1,4-dioxane in the wastewater from a range of about 10 ppm to about 1000 ppm of dioxane down to less than 5 ppb of 1,4-dioxane after treatment. The method is also effective for removing hydrocarbon species that may be present in the wastewater.

    Demulsifying method for drilling fluids
    45.
    发明授权
    Demulsifying method for drilling fluids 有权

    公开(公告)号：US11472994B2

    公开(公告)日：2022-10-18

    申请号：US17133320

    申请日：2020-12-23

    Applicant: STEPAN COMPANY

    Inventor： Yongling Ginger Ren ,  Aaron Sanders ,  Jonathan Mohandessi

    IPC: C09K8/035 ,  E21B21/06

    Abstract: A method for demulsifying a recovered drilling fluid is disclosed. A recovered drilling fluid is first combined with dilution water and a diethanolamine-based C8-C18 alkanolamide demulsifying agent. The recovered drilling fluid comprises hydrocarbons, a brine having at least 25% total dissolved solids, an emulsifier, and undissolved oil-wetted solids. In a second step, the mixture is separated, or is allowed to separate, into three distinct phases, including a clear oil phase comprising the hydrocarbons, a clear brine phase, and a water-wetted solid phase. Compositions suitable for use as demulsifiers and demulsified compositions are also disclosed. The alkanolamide demulsifying agents enable rapid, clean separation of phases and efficient recovery of 80% or more of the oil phase from the recovered drilling fluid.

    REACTIVE SURFACTANTS
    46.
    发明申请
    REACTIVE SURFACTANTS 有权

    公开(公告)号：US20220177403A1

    公开(公告)日：2022-06-09

    申请号：US17437294

    申请日：2020-03-05

    Applicant: STEPAN COMPANY

    Inventor： Timothy A. BOEBEL ,  Samantha Michelle FARRIS ,  Gary LUEBKE ,  E. Carolina ROJAS ,  Chris SPAULDING ,  Michael R. TERRY ,  Patrick Shane WOLFE ,  Julia ZAUG

    IPC: C07C67/08 ,  C07C41/03 ,  C07D295/088

    Abstract: Processes for making reactive surfactants are disclosed. In one such process, a fatty epoxide, a glycidyl ether, or a combination thereof is reacted with an olefin-functional nucleophile to produce an olefin-functional hydrophobe. The olefin-functional hydrophobe is reacted with ethylene oxide, propylene oxide, butylene oxides, or a combination thereof to produce an alkoxylate. Optionally, the alkoxylate is converted to the corresponding sulfate, phosphate, or maleate. Surfactant compositions comprising the reactive surfactants made by these processes are also described. The invention includes polymerizable mixtures comprising an acrylic monomer and the surfactant compositions as well as aqueous acrylic latex emulsions and coatings produced from the emulsions. The reactive surfactants deliver stable latex emulsions with reduced tendency for surfactant migration or excessive foaming. Coatings from the emulsions have improved wet adhesion, scrub resistance, and water resistance.

    HARDNESS AND FLATNESS TESTER
    47.
    发明申请
    HARDNESS AND FLATNESS TESTER 有权

    公开(公告)号：US20210278202A1

    公开(公告)日：2021-09-09

    申请号：US17322225

    申请日：2021-05-17

    Applicant: STEPAN COMPANY

    Inventor： Thomas K. Johnson, JR. ,  David J. Norberg ,  Daniel Yocius

    IPC: G01B11/25 ,  B29C44/60 ,  G01B11/06 ,  G01B11/22 ,  G01B11/30 ,  G01B17/08

    Abstract: Methods and systems for determining the integrity of a manufactured board are disclosed. An example system includes a testing platform configured to secure the manufactured board, a sensor configured to measure a parameter corresponding to a flatness of a surface of the board, and a controller. The controller is configured to identify regions on the surface corresponding to one of a peak or a valley based on the parameter, and calculate a score representing the integrity of the manufactured board based on the identified peaks and valleys. The controller adjusts a flow rate, a pressure, a temperature, and position of a deposited substance in a manufacturing process based on a comparison with a height of the peak and/or a depth of the valley to stored peak heights and/or valley depths. In some examples, a mechanical tester determines a compressive strength and a density of die board at the identified regions.

    Microemulsion flowback aids for oilfield uses
    49.
    发明授权
    Microemulsion flowback aids for oilfield uses 有权

    公开(公告)号：US11066593B2

    公开(公告)日：2021-07-20

    申请号：US15931665

    申请日：2020-05-14

    Applicant: STEPAN COMPANY

    Inventor： John C. Hutchison

    IPC: C09K8/536 ,  C09K8/60 ,  C09K8/86

    Abstract: Flowback aid mixtures and oil-in-water microemulsions produced by combining an aqueous brine with the flowback aid mixtures are disclosed. The flowback aid mixture comprises an oil, a fatty alcohol ethoxylate, and a quaternized fatty amine ethoxylate. The amount of oil is less than or equal to 12 wt. % based on the amount of flowback aid mixture. The microemulsions have a surface tension at 25° C. less than 30 mN/m and a Z-average particle size as determined by dynamic light scattering at 25° C. of less than or equal to 10 nm. Also disclosed are processes that utilize the flowback aid mixtures. In one process, the mixture is introduced into a subterranean formation and is combined prior to or during its introduction into the formation with a formation brine, process water, or both to give the microemulsion. In one hydraulic fracturing process for recovering gas, oil, or both, a fracturing fluid and the flowback aid are co-injected into a subterranean formation to give the microemulsion.

    Isocyanate-modified polyester-epoxide polymer compositions
    50.
    发明授权
    Isocyanate-modified polyester-epoxide polymer compositions 有权

    公开(公告)号：US11059933B2

    公开(公告)日：2021-07-13

    申请号：US16556396

    申请日：2019-08-30

    Applicant: STEPAN COMPANY

    Inventor： Warren A. Kaplan ,  Jennifer S. Westfall

    IPC: C08G18/42 ,  C08G18/16 ,  C08G18/58 ,  C08G18/76 ,  C08L75/04 ,  C09D175/08

    Abstract: Isocyanate-modified polyester-epoxide polymer (i-PEEP) compositions are disclosed. The i-PEEP compositions comprise a reaction product of a polyepoxide compound, a polyisocyanate, and a polyester polyol composition. The ratio of epoxy equivalents to hydroxyl equivalents is within the range of 0.2 to 2. The i-PEEP index as defined herein is within the range of 100 to 200. The i-PEEP composition has a Tg within the range of −30° C. to 35° C. Low- and elevated-temperature processes catalyzed by bases or Lewis acids for making the i-PEEP compositions are also disclosed. In a simple yet innovative approach, a new class of polymers useful for coatings, elastomers, adhesives, sealants, and other valuable products is assembled from readily available starting materials without reliance on the polyamines typically used to cure epoxy systems.

Patent Agency Ranking