公开(公告)号：US09963629B2

公开(公告)日：2018-05-08

申请号：US14774146

申请日：2014-03-05

Applicant: Stepan Company

Inventor： Nicholas S. Pendleton ,  Christopher D. Smith

IPC: C09K8/584 ,  C09K8/536 ,  C11C3/00 ,  C11C3/10

CPC classification number: C09K8/584 ,  C09K8/536 ,  C11C3/00 ,  C11C3/10

Abstract: Foamable compositions useful for deliquifying gas wells, particularly gas wells having at least 40 vol. % of a hydrocarbon condensate, are disclosed. The compositions comprise, in addition to the condensate, an aqueous brine and 250 to 10,000 ppm of a monounsaturated betaine or sulfobetaine. A method for deliquifying the production line of a natural gas well is also disclosed. The method comprises introducing into a gas well a monounsaturated betaine or sulfobetaine to form a foamed composition, and removing at least a portion of the foamed composition from the production line. Certain betaines and sulfobetaines are remarkably effective in producing foams useful for gas well deliquification, particularly gas wells characterized by high or very high condensate levels. The inventive compositions and method provide a cost-effective way to enable thousands of gas wells to be utilized more productively.

公开(公告)号：US20160040056A1

公开(公告)日：2016-02-11

申请号：US14774146

申请日：2014-03-05

Applicant: STEPAN COMPANY

Inventor： Nicholas S. Pendleton ,  Christopher D. Smith

IPC: C09K8/584

CPC classification number: C09K8/584 ,  C09K8/536 ,  C11C3/00 ,  C11C3/10

Abstract: Foamable compositions useful for deliquifying gas wells, particularly gas wells having at least 40 vol. % of a hydrocarbon condensate, are disclosed. The compositions comprise, in addition to the condensate, an aqueous brine and 250 to 10,000 ppm of a monounsaturated betaine or sulfobetaine. A method for deliquifying the production line of a natural gas well is also disclosed. The method comprises introducing into a gas well a monounsaturated betaine or sulfobetaine to form a foamed composition, and removing at least a portion of the foamed composition from the production line. Certain betaines and sulfobetaines are remarkably effective in producing foams useful for gas well deliquification, particularly gas wells characterized by high or very high condensate levels. The inventive compositions and method provide a cost-effective way to enable thousands of gas wells to be utilized more productively.

Abstract translation: 可气泡组合物可用于气化气分离，特别是具有至少40vol。 ％的烃缩合物。 组合物除冷凝物外还包含水性盐水和250至10,000ppm的单不饱和甜菜碱或磺基甜菜碱。 还公开了天然气井生产线的鉴定方法。 该方法包括向气井中引入单不饱和甜菜碱或磺基甜菜碱以形成发泡组合物，并从生产线除去至少一部分发泡组合物。 某些甜菜碱和磺基甜菜碱在生产可用于气井分离的泡沫体方面是非常有效的，特别是以高或非常高的冷凝液水平为特征的气井。 本发明的组合物和方法提供了一种成本有效的方法，以使得能够更有效地利用数千个气井。

公开(公告)号：US20140194646A1

公开(公告)日：2014-07-10

申请号：US14146662

申请日：2014-01-02

Applicant: Stepan Company

Inventor： David R. Allen ,  Anatoliy A. Dameshek ,  Branko Sajic ,  Irene Shapiro ,  Xue Min Dong ,  Christopher D. Smith ,  Jacqueline M. Pytel ,  Jeremy Weitgenant

IPC: C07C67/08

CPC classification number: C07C67/08 ,  A61K8/37 ,  A61Q5/02 ,  A61Q15/00 ,  A61Q19/10 ,  C07B2200/07 ,  C07C67/03 ,  C07C69/68

Abstract: Provided are alkyl lactyllactate compositions that can be prepared from (1) lactide or alternatively lactic acid, and (2) a hydroxyl containing compound such as an alcohol, preferably a fatty alcohol or an alkoxylated alcohol, with (3) an acid catalyst. Preferably, the fatty alcohol contains from about 6 to 18 carbon atoms, such as lauryl alcohol. The alkyl lactyllactates can be used as surfactants, emulsifiers, skin feel agents, film formers, thickeners, rheological modifiers, etc., for personal care and other application areas. Compositions containing at least one alkyl lactyllactate are also provided. The compositions can further contain at least one surfactant.

Abstract translation: 本发明提供可由（1）丙交酯或乳酸制备的乳酸乳糖酯组合物，和（2）含羟基化合物如醇，优选脂肪醇或烷氧基化醇与（3）酸催化剂。 优选地，脂肪醇含有约6至18个碳原子，例如月桂醇。 乳酸乳酸烷基酯可用作个人护理和其他应用领域的表面活性剂，乳化剂，皮肤感觉剂，成膜剂，增稠剂，流变改性剂等。 还提供了含有至少一种乳糖基乳酸酯的组合物。 组合物还可以含有至少一种表面活性剂。