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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 55, Number 5
JKCSEZ 55(5)
October 20, 2011 

Study on the Industrial Process of Rubber Anti-oxidant RD
Liu Yu*, Gao qinyu, Liu Lianxin, Shi guangxia
Rubber anti-oxidant RD, Orthogonal design, Ratio of keto-amine, Ratio of catalyst acid-amine
This paper is on the industrial synthesis process of anti-oxidant RD ((2,2,4-trimethyl-1,2-dihydroquinoline polymer (C12H15N)n. n=2-4)).The content of dimer, trimer and tetramer of RD as the inspection targets, using the orthogonal design method - take the ratios of keto-amine, the reaction time, the reaction temperatures and the ratios of catalyst acid-amine as inspect factors - to optimized the reaction condition. The results indicate that the best ratio of keto-amine is 2:1, the time of salification and condensation is 3 hours and 7.5 hours. The range of temperature of salification and condensation is 135 oC and 120-125 oC, and that the best ratio of acid-amine is 0.2: 1 (the proportion is the concentration ratio for mole). Under the optimization conditions, the yield of RD was stabilized and content of RD more than 45%.
830 - 834
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