Premium
Granulation Process for Producing Spherical Particles of a Rubber Antioxidant in a Water Cooling Tower
Author(s) -
Li X.,
Wang T.J.,
Jin Y.
Publication year - 2006
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200600023
Subject(s) - granulation , drop (telecommunication) , materials science , dewatering , composite material , natural rubber , particle (ecology) , particle size , chemical engineering , mechanical engineering , engineering , oceanography , geotechnical engineering , geology
A new granulation technology for producing spherical particles of a rubber antioxidant and its key factors were studied. The granulation is based on the interfacial tension and immiscibility of the rubber antioxidant in water. Melted antioxidant was ejected from nozzles to form drops in air that fell into a water tower where they were cooled and solidified into spherical particles as they fell. After dewatering and air drying, spherical particles with a uniform size were obtained. Experiments performed on the granulation of antioxidant 4020 are described and the key factors, including falling height, drop temperature and surfactant concentration in water were studied. The mechanism of drop entrancement in water was analyzed and the stable operating conditions were investigated. The technology produces spherical particles with a uniform size using smaller equipment and is also suitable for producing spherical particles from other melted materials with similar physical properties.