Open AccessPROSPECTS FOR USE OF TRIETHANOLAMINE IN PRODUCTION OF SYNTHETIC RUB-BERS
Author(s) -
Vera N. Chernykh,
Natalia A. Patrusheva,
И. Н. Пугачева,
Н. С. Никулина,
С. С. Никулин
Publication year - 2021
Publication title -
izvestiâ vysših učebnyh zavedenij. himiâ i himičeskaâ tehnologiâ/izvestiâ vysših učebnyh zavedenij. seriâ himiâ i himičeskaâ tehnologiâ
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.221
H-Index - 5
eISSN - 2500-3070
pISSN - 0579-2991
DOI - 10.6060/ivkkt.20216403.6303
Subject(s) - triethanolamine , chemistry , aqueous solution , sulfuric acid , hydrochloride , hydrochloric acid , nuclear chemistry , inorganic chemistry , coagulation , chloride , organic chemistry , analytical chemistry (journal) , psychology , psychiatry
The paper investigates the possibility of using SKS-30 ARK as a promising coagulant of triethanolamine and its salt in the technology of producing styrene-butadiene rubber. It was found that complete coagulation in the presence of triethanolamine occurs only at high consumption of its acidifying agent (sulfuric acid solution). Otherwise, complete coagulation is not observed. This is due to the fact that aqueous solutions of triethanolamine have an alkaline medium, and in this medium the aggregate stability of latex is greatest. It is noted that an increase in the consumption of triethanolamine in the process of coagulation not only does not increase the yield of rubber crumbs, but also leads to an increase in the consumption of the acidifying agent. It was found that to eliminate this disadvantage, it is possible to use the triethanolamine salt-triethanolamine hydrochloride. This solution was obtained from aqueous solutions of triethanolamine and hydrochloric acid, using homogenization. When triethanolamine hydrochloride is used as a coagulant, the process of separating rubber from latex proceeds by a neutralization mechanism. It was found that it is possible to use triethanolamine hydrochloride as a coagulant in lower dosages than sodium chloride and triethanolamine. It should be noted that the aqueous phase formed during the coagulation process in the presence of triethanolamine hydrochloride can later be returned to production as a solvent in the preparation of aqueous solutions of the acidifying agent and coagulant. At the same time, triethanolamine has anti-corrosion activity, which is a positive point for processes where strong sulfuric acid is used. It is established that the physical and mechanical characteristics of vulcanizates obtained on the basis of rubbers made in the presence of triethanolamine hydrochloride meet the requirements of the standard.