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    Detergents for cold-water cleaning
    7.
    发明授权
    Detergents for cold-water cleaning 有权

    公开(公告)号：US11142729B2

    公开(公告)日：2021-10-12

    申请号：US16536863

    申请日：2019-08-09

    申请人： Stepan Company

    发明人： Brian Holland ,  Randal J. Bernhardt ,  Branko Sajic ,  Rick Tabor

    IPC分类号： C11D1/00 ,  C11D11/00 ,  C11D1/14 ,  C11D1/22 ,  C11D1/29 ,  C11D1/34 ,  C11D1/72 ,  C11D1/75 ,  C11D1/83 ,  C11D1/90 ,  C11D1/92 ,  C11D3/30 ,  C11D3/386

    摘要： Detergents useful for cold-water cleaning and mid-chain headgroup and alkylene-bridged surfactants useful therein are disclosed. The mid-chain headgroup surfactant has a C14-C30 alkyl chain and a polar group bonded to a central zone carbon of the alkyl chain. The alkylene-bridged surfactant has a C12-C18 alkyl chain, a polar group, and a C1-C2 alkylene group bonded to the polar group and a central zone carbon of the C12-C18 alkyl chain. Preferred surfactants in these classes are alcohol sulfates, alcohol ethoxylates, ether sulfates, sulfonates, arylsulfonates, alcohol phosphates, amine oxides, quaterniums, betaines, and sulfobetaines. Surprisingly, detergents formulated with the surfactants provide outstanding cold-water performance in removing greasy stains such as bacon grease, butter, cooked beef fat, or beef tallow from soiled articles.

    Steam foam methods for steam-assisted gravity drainage
    8.
    发明授权
    Steam foam methods for steam-assisted gravity drainage 有权

    公开(公告)号：US10989028B2

    公开(公告)日：2021-04-27

    申请号：US16781608

    申请日：2020-02-04

    申请人： Stepan Company

    发明人： Aaron Sanders ,  Gregory P. Dado ,  Brian Holland ,  Xue Min Dong ,  E. Carolina Rojas

    IPC分类号： E21B43/24 ,  C09K8/584 ,  E21B43/30

    摘要： Methods for making efficient use of steam in a steam-assisted gravity drainage (SAGD) process for recovering heavy oils from tar sands and similar petroleum deposits are disclosed. The methods utilize a surfactant to generate steam foam in ways that maximize efficient use of steam. In some aspects, steam foam is used in water layers or gas caps that reside above steam chambers to prevent loss of steam from the steam chamber. The predominant use of relatively dry steam in SAGD processes makes it challenging to find ways to introduce surfactants and generate steam foam. However, decreasing the mobility of the steam by converting at least some of it to foam allows the wellbore and steam chambers above the injection site to be more fully developed, provides for more effective heat transfer to the heavy oil and rock, improves production, and allows recovery of the heavy oil with a minimum amount of steam usage.

    Cold-water laundry detergents
    9.
    发明授权
    Cold-water laundry detergents 有权

    公开(公告)号：US10570352B2

    公开(公告)日：2020-02-25

    申请号：US15541500

    申请日：2015-12-29

    申请人： STEPAN COMPANY

    发明人： Brian Holland ,  Randal Bernhardt ,  Branko Sajic

    IPC分类号： C11D1/37 ,  C11D1/14 ,  C11D1/29 ,  C11D3/386 ,  C11D1/22 ,  C11D1/90 ,  C11D1/34 ,  C11D1/83 ,  C11D1/92 ,  C11D1/62 ,  C11D11/00 ,  C11D1/72 ,  C11D1/75

    摘要： Laundry detergents and their use for cold-water cleaning are disclosed. The detergents comprise a lipase and a mid-chain headgroup surfactant or an alkylene-bridged surfactant. The mid-chain headgroup surfactants have a C14-C30 alkyl chain and a polar group bonded to a central zone carbon of the C14-C30 alkyl chain. The alkylene-bridged surfactants comprise a C12-C18 alkyl chain, a polar group, and a C1-C2 alkylene group bonded to the polar group and a central zone carbon of the C12-C18 alkyl chain. Surprisingly, when combined with lipases, detergents formulated with the mid-chain headgroup or alkylene-bridged surfactants effectively liquefy greasy soils at low temperature and provide outstanding cold-water performance in removing greasy stains such as bacon grease, butter, cooked beef fat, or beef tallow from soiled articles.

    Detergents for cold-water cleaning
    10.
    发明授权
    Detergents for cold-water cleaning 有权

    公开(公告)号：US10421930B2

    公开(公告)日：2019-09-24

    申请号：US15353968

    申请日：2016-11-17

    申请人： Stepan Company

    发明人： Brian Holland ,  Randal J. Bernhardt ,  Branko Sajic ,  Rick Tabor

    IPC分类号： C11D1/00 ,  C11D11/00 ,  C11D1/14 ,  C11D1/22 ,  C11D1/29 ,  C11D1/34 ,  C11D1/72 ,  C11D1/75 ,  C11D1/83 ,  C11D1/90 ,  C11D1/92 ,  C11D3/30 ,  C11D3/386

    摘要： Detergents useful for cold-water cleaning and mid-chain headgroup and alkylene-bridged surfactants useful therein are disclosed. The mid-chain headgroup surfactant has a C14-C30 alkyl chain and a polar group bonded to a central zone carbon of the alkyl chain. The alkylene-bridged surfactant has a C12-C18 alkyl chain, a polar group, and a C1-C2 alkylene group bonded to the polar group and a central zone carbon of the C12-C18 alkyl chain. Preferred surfactants in these classes are alcohol sulfates, alcohol ethoxylates, ether sulfates, sulfonates, arylsulfonates, alcohol phosphates, amine oxides, quaterniums, betaines, and sulfobetaines. Surprisingly, detergents formulated with the surfactants provide outstanding cold-water performance in removing greasy stains such as bacon grease, butter, cooked beef fat, or beef tallow from soiled articles.