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    STEAM FOAM METHODS FOR STEAM-ASSISTED GRAVITY DRAINAGE
    112.
    发明申请
    STEAM FOAM METHODS FOR STEAM-ASSISTED GRAVITY DRAINAGE 审中-公开

    公开(公告)号：US20170226836A1

    公开(公告)日：2017-08-10

    申请号：US15503293

    申请日：2015-07-31

    Applicant: Stepan Company

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

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

    CPC classification number: E21B43/2408 ,  C09K8/584 ,  E21B43/305

    Abstract: 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.

    AGRICULTURAL COMPOSITIONS WITH REDUCED AQUATIC TOXICITY
    116.
    发明申请
    AGRICULTURAL COMPOSITIONS WITH REDUCED AQUATIC TOXICITY 审中-公开

    公开(公告)号：US20170142963A1

    公开(公告)日：2017-05-25

    申请号：US15323188

    申请日：2015-06-09

    Applicant: Stepan Company

    Inventor： Dave R. Allen ,  Andrew D. Malec

    IPC: A01N25/30 ,  A01N57/12

    Abstract: Agricultural compositions having reduced aquatic toxicity are disclosed. The compositions comprise an agricultural active, a monounsaturated C10-C12 fatty amine ethoxylate, and optionally water. The compositions may further comprise an auxiliary surfactant, a solvent, or both. In certain preferred aspects, the agricultural active is a glyphosate salt. Agricultural compositions comprising a monounsaturated C10-C12 fatty amine ethoxylate have good herbicidal efficacy. Unexpectedly, the monounsaturated C10-C12 fatty amine ethoxylates have reduced aquatic toxicity when compared with their saturated analogs.

    Method of sulfonation of block polymers
    117.
    发明授权
    Method of sulfonation of block polymers 有权
    嵌段聚合物的磺化方法

    公开(公告)号：US09587106B2

    公开(公告)日：2017-03-07

    申请号：US14486604

    申请日：2014-09-15

    Applicant: Stepan Company

    Inventor： Gregory Paul Dado ,  Dale Lee Handlin, Jr. ,  Carl Lesley Willis

    IPC: C08F8/36 ,  C08L53/02 ,  C08G81/02

    CPC classification number: C08L53/025 ,  C08F8/36 ,  C08F2800/20 ,  C08G81/022 ,  C08L2201/56 ,  C08F297/044 ,  C08F8/04

    Abstract: Improved methods for preparing sulfonated block polymers with acyl sulfates in non-halogenated aliphatic solvents are provided. The methods include the sulfonation of a precursor block polymer with an acyl sulfate in a reaction mixture further comprising at least one non-halogenated aliphatic solvent to form a sulfonated block polymer, wherein the initial concentration of the precursor block polymer is in the range of from about 0.1 wt % to a concentration that is below the limiting concentration of the precursor block polymer based on the total weight of the reaction mixture. A sulfonation degree of greater than about 1.0 milliequivalent sulfonic acid per gram sulfonated block polymer can be achieved substantially free of polymer precipitation and free of disabling gelation.

    Abstract translation: 提供了在非卤代脂族溶剂中制备具有酰基硫酸盐的磺化嵌段聚合物的改进方法。 所述方法包括在还含有至少一种非卤代脂族溶剂的反应混合物中使用酰基硫酸酯磺化前体嵌段聚合物以形成磺化嵌段聚合物，其中前体嵌段聚合物的初始浓度范围为 约0.1重量％至低于前体嵌段聚合物的极限浓度的浓度，基于反应混合物的总重量。 可以实现大于约1.0毫当量磺酸/克磺化嵌段聚合物的磺化度，基本上不含聚合物沉淀并且没有失效的凝胶化。

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