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:
Nov. 12, 1991
Filed:
Sep. 15, 1989
Tod A Sutton, Midland, MI (US);
Karl V Jacob, Midland, MI (US);
Timothy Lim, Midland, MI (US);
Steven P Sandor, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A process for recycling and reblending dry, difficult to hydrate polymer fines into a water-swellable fluid absorbent polymer gel is disclosed. The process requires feeding the dry polymer fines into a first mixing zone where they are subjected to spraying with water that at least partially hydrates the fines and mixing, substantially simultaneously with the water contact, at high shear such at the fines are substantial completely hydrated without agglomeration. The hydrated fines are then transported from the first zone into a second mixing zone where blending of the hydrated fines with fresh polymer gel occurs at medium shear such that a substantially uniformly blended product results. The resulting process successfully re-introduces fines into the main product stream wherein the resulting product has high aqueous fluid absorbent capacity and good particulate mechanical integrity.