Maro Publications

Wet Grinding

Notes

from 03/15/2014 to *6/4/2012

Maro Topics

Patents with Abstracts

Mixing

Grinding

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 

Notes

Wet grinding of water-soluble polymers is used to disperse and dissolve these polymers in water.  The polymer is suspended in water with a grinder a rotating rotor with knives.  The plugging of this stator is prevented by secondary water jets which disperse and dilute the polymer.

Among the water-soluble polymers belonging to the prior art, partially hydrolysed acrylamide polymers and their copolymers are particularly known, and also xanthan gums, cellulose derivatives and guar gums. These polymers develop a viscosity thanks to their molecular weight and/or the inter-chain ionic repulsions. The mechanism governing the viscosity is linked to a rise in hydrodynamic volume or to inter-chain repulsions.  Although acrylamide (co)polymers are usually available commercially in the form of powders, they are generally used in dilute aqueous solutions in industrial applications. This necessitates a step of dissolution of the polymer in the water in precise physical and chemical conditions.  However, even if these polymers are hydrophilic, their dissolution is difficult. Their dissolution varies, in particular, according to their composition and their molecular weight.

[Pich and Jeronimo, US Patent 8,186,871 (5/29/2012)]

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

In this day of overworked technical people, keeping up is nearly impossible.  Maro's mission is to help keep up in as little time as possible.  Bookmark this page and check it often.  You will be surprised what can be picked up in just a few moments spent each day.

These pages list the links as they are found.  Some will abstracted and added to Maro Topics. (RDC 2/7/2012)

 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

***********************************

Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
**************************************

* Date of latest addition; date of first entry is 6/4/2012.