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.:
Date of Patent:
Jun. 26, 2018
Filed:
Apr. 23, 2014
Ecolab Usa Inc., St. Paul, MN (US);
Yanru Fan, Shanghai, CN;
Yulin Zhao, Shanghai, CN;
ECOLAB USA INC., St. Paul, MN (US);
Abstract
Disclosed are an oil-in-water emulsion defoamer and a method for preparing the defoamer. The defoamer may have a dispersed oil phase with a droplet size of 4 to 8 μm, and a viscosity of 100 to 1000 cP, and is widely used for defoaming in paper coating and wet-end in a paper mill. A method for preparing an oil-in-water emulsion defoamer is also provided. The method may include adding an emulsifying agent to biodiesel, and mixing, then gradually adding hydrophobic fumed silica to obtain a first mixture. The method may also include gradually adding water and a non-ionic surfactant, and stirring until uniform to obtain a second mixture. The method may also include gradually adding the first mixture to the second mixture, and stirring until uniform, to obtain an oil-in-water emulsion defoamer.