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:
Jan. 02, 2024
Filed:
Dec. 08, 2021
The Goodyear Tire & Rubber Company, Akron, OH (US);
Bruce Raymond Hahn, Hudson, OH (US);
George Jim Papakonstantopoulos, Medina, OH (US);
The Goodyear Tire & Rubber Company, Akron, OH (US);
Abstract
The subject invention discloses an improved method for making pre-hydrophobated precipitated silica from rice hull ash silica. This process is renewable, highly efficient, and incorporates virtually all of the silica coupling agent used in making the pre-hydrophobated precipitated silica into the final product. The subject invention more specifically reveals a method for making pre-hydrophobated precipitated silica comprising: (1) dispersing silica into water under conditions of agitation to made an aqueous silica slurry; (2) adding a phase transfer agent to the aqueous silica slurry; (3) adding a silica coupling agent to the aqueous silica slurry; (4) maintaining the aqueous slurry at a temperature of at least 20° C. for a time which is sufficient for the silica coupling agent to react with the silica to produce the pre-hydrophobated precipitated silica; and (5) recovering the pre-hydrophobated precipitated silica from the aqueous silica slurry.