摘要
目的为了脱除白油中的石蜡,降低白油的浊点,合成助滤剂应用到白油酮苯脱蜡工艺中。方法研究了白油酮苯脱蜡过程中酮比、溶剂体积比、脱蜡温度对脱蜡效果的影响,将马来酸酐-α-十八烯共聚物分别与苯胺、苯乙胺和氨基偶氮苯进行反应,得到3类梳型聚合物(分别命名为AMAC、EMAC、Azo-MAC),研究了聚合物的种类和添加量对白油酮苯脱蜡效果的影响。结果在未加助滤剂的条件下,酮比为55%、溶剂体积比为3.0∶1、脱蜡温度为-14℃时的脱蜡效果最好,得到的蜡收率为5.6%,浊点为-2℃;在所筛选的较优工艺下,添加100μg/g侧链与主链物质的量比为2∶1的AMAC和EMAC,可使蜡收率提升为5.9%和6.0%,浊点下降到-4℃。结论聚合物AMAC和EMAC表现出助滤剂的特点,在白油酮苯脱蜡工艺中加入助滤剂AMAC和EMAC可以改善脱蜡效果,提高析蜡点。
Objective In order to remove paraffin from white oil and reduce its cloud point,filter aids were applied to methyl ethyl ketone(MEK)-toluene dewaxing process of the white oil.Methods The influences of the volume percentage of MEK in the mixed solvent,the volume ratio of solvent to white oil,and the dewaxing temperature on the dewaxing effect were studied.Three types of comb-type copolymers denoted AMAC,EMAC and Azo-MAC were obtained by the reaction of maleic anhydride-α-octadecene copolymers with aniline,phenylethylamine and amino-azobenzene,respectively.The effects of polymer types and addition amount on the MEK-toluene dewaxing were studied.Results The optimum dewaxing effect was obtained at a MEK ratio of 55%,a solvent ratio of 3.0∶1,and a dewaxing temperature of-14℃without filter aids,the wax yield was 5.6%and the cloud point was-2℃.Under the optimal process conditions,the wax yield was improved to 5.9%and 6.0%and the cloud point reduced to-4℃by adding 100μg/g of AMAC and EMAC with a molar ratio of side chain to main chain of 2∶1,respectively.Conclusions Polymer AMAC and EMAC show the characteristics of filter aids.Adding the filter aids AMAC and EMAC in the MEK-toluene dewaxing process of white oil can improve the dewaxing effect and increase the wax precipitation point.
作者
王正
孙辉
宋月芹
周晓龙
Wang Zheng;Sun Hui;Song Yueqin;Zhou Xiaolong(Research Institute of Petroleum Processing,School of Chemical Engineering,East China University of Science and Technology,Shanghai,China)
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2023年第5期30-37,共8页
Chemical engineering of oil & gas
关键词
聚合物
助滤剂
酮苯脱蜡
白油
浊点
polymer
filter aid
MEK-toluene dewaxing
white oil
cloud point
