Attributs | Valeurs |
---|
type
| |
Is Part Of
| |
Subject
| |
Title
| - Development of an Ultra-rapid Reactor for Superabsorbent Polymer
|
has manifestation of work
| |
related by
| |
Author
| |
Abstract
| - Superabsorbent polymers are obtained by the polymerization of acrylic acid and its salts.Industrial processes for the production of superabsorbent polymers require many labor- andcapital-intensive steps in several vessels. This paper presents a new process that synthesizessuperabsorbent polymer in a single vessel, a modified spray dryer. Very fast polymerization isobtained with appropriate reactants and initiators, selected from 150 different combinations.Preheating and using the heat of neutralization of the acrylic acid greatly accelerate polymerization. A new, ultra-rapid reactor quickly mixes two streams of reactants and initiators to providefine droplets of polymerizing liquid. A two-stage mixer provides the best results: two flat jets ofliquids are first impacted at high velocity, and a high velocity gas jet is applied to the resultingliquid stream to form a spray of fine droplets and enhance drying. The compact reactor is locatedwithin the inlet region of a standard spray dryer that can deliver dry particles of superabsorbent.Preliminary experiments in a modified pilot-plant spray dryer gave superabsorbent polymerwith a conversion rate higher than 65%.
|
article type
| |
is part of this journal
| |