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Dialkylbenzene의 Sulfonation
Sulfonation of Dialkylbenzene
HWAHAK KONGHAK, February 1988, 26(1), 33-38(6), NONE
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Abstract
Dialkylbenzene을 발연황산과 SO3 기체에 의한 술폰화에 대해서 논의하였다. 발연황산에 의한 술폰화는 40-60 ℃의 반응온도, dialkylbenzene에 대한 발연황산의 무게비를 1.6으로 하여 2시간의 반응에서 부반응의 진행없이 높은 산가（TAN）를 나타내었지만, 사용된 발연황산의 87 %가 폐산으로 부생되었다. 한편, SO3 gas에 의한 술폰화는 다소 낮은 TAN값과 10 % 내외의 부반응이 진행되었지만, 윤활유 첨가제 중간체로서의 사용이 가능하였으며, 가장 적합한 반응조건은 50 ℃ 내외의 반응온도, 공기에 대한 6-8 %의 SO3 gas 농도 및 주입된 총 SO3 양은 dialkylbenzene의 1.2 mole배이었다. 그리고 부반응을 감소시키는 방안으로는 완전한 건조 공기의 사용과 반응열의 적절한 제거가 필요하였다.
This paper deals with the sulfonation of dialkylbenzene by oleum, and by gaseous sulfur trioxide. At 40-60 oC, and with the weight ratio of oleum to dialkylbenzene equals to 1.6 : 1, the sulfonation led to a high value of total acid number（TAN） without side reaction for two hours. However, 87 % of feed oleum formed acid sludge as a byproduct.
The sulfonation with gaseous SO3 led to a low TAN value, and also led to about 10% of side reaction. The products thus obtained were usable as a intermediate of lubricating oil additives. The optimum conditions for the reaction were found to be about 50oC, 6-8% of SO3 concentration in air and with the mole ratio of total SO3 to dialkylbenzene equals to 1.2 : 1. To suppress the side reaction, the heat of reaction should be removed properly in addition to using a perfectly dried air.
The sulfonation with gaseous SO3 led to a low TAN value, and also led to about 10% of side reaction. The products thus obtained were usable as a intermediate of lubricating oil additives. The optimum conditions for the reaction were found to be about 50oC, 6-8% of SO3 concentration in air and with the mole ratio of total SO3 to dialkylbenzene equals to 1.2 : 1. To suppress the side reaction, the heat of reaction should be removed properly in addition to using a perfectly dried air.
