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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10781165 B1

PDFFull Text
Expired
Date of Patent:
Sep. 22, 2020

Filed:

Jun. 18, 2019

Ph-responsive amphoteric surfactant n-lauryl-(α-alkyl)-β-aminopropionic acid and preparation method and uses thereof

Applicant:

Shaanxi University of Science & Technology, Xi'an, Shaanxi, CN;

Inventors:

Xiaojuan Lai, Shaanxi, CN;

Zhiqiang Dang, Shaanxi, CN;

Lei Wang, Shaanxi, CN;

Shaoyun Ma, Shaanxi, CN;

Xianwen Li, Shaanxi, CN;

Wei Tian, Shaanxi, CN;

Xingen Feng, Shaanxi, CN;

Yinyin Zhang, Shaanxi, CN;

Xu Yang, Shaanxi, CN;

Assignee:

Shaanxi University of Science & Technology, Xi'an, CN;

Attorneys:

Wayne & Ken, LLC

Tony Hom

Primary Examiner:

Yate′ K Cutliff

Int. Cl.
CPC ...
C07C 227/18 (2006.01); B01F 17/00 (2006.01); C07C 227/40 (2006.01); C07C 229/12 (2006.01);
U.S. Cl.
CPC ...
C07C 227/18 (2013.01); B01F 17/0042 (2013.01); C07C 227/40 (2013.01); C07C 229/12 (2013.01);
Abstract

Disclosed are a pH-responsive amphoteric surfactant N-lauryl-(α-alkyl)-β-aminopropionic acid and a preparation method and uses thereof. An alkylamine and a solvent are added to a three-necked flask, stirred for complete dissolution, slowly dropwise added with methyl α-alkyl-acrylate and reacted at room temperature after the ice-water bath is removed. The reaction mixture is refluxed in water bath and evaporated under rotation to remove the solvent and the residual methyl α-alkyl-acrylate to give N-lauryl-(α-alkyl)-β-aminopropionic acid. Then N-lauryl-(α-alkyl)-β-aminopropionic acid and water are added to a three-necked flask, slowly dropwise added with a sodium hydroxide solution and reacted in water bath to give a crude product, which is filtered and dried to give a purified surfactant sodium N-lauryl-(α-alkyl)-β-aminopropionate. This surfactant is suitable for the foamed acid system and its performance can be switched by adjusting pH due to pH sensitivity.

Find Patent Forward Citations

Lai, Xiaojuan. (2020). Ph-responsive amphoteric surfactant n-lauryl-(α-alkyl)-β-aminopropionic acid and preparation method and uses thereof (U.S. Patent No. 10781165). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10781165

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