摘要
以丙烯酸和聚醚为主要原料,应用先酯化后共聚两步法合成了一种具有梳型结构的聚合物破乳剂。分别考察了酯化反应和聚合反应的最佳工艺条件。结果表明,酯化反应最佳条件为:聚醚与丙烯酸摩尔比1∶1,催化剂对甲苯磺酸,其用量占聚醚与丙烯酸总量的4%,阻聚剂对苯二酚单甲醚,其用量占丙烯酸质量的0.6%,带水剂是固含量40%的二甲苯,酯化时间4h;聚合反应最佳条件:引发剂过氧化苯甲酰用量占丙烯酸质量的10%,丙烯酸与酯化物质量比1∶6,聚合温度80～90℃,聚合时间3.5h。两步法制备的梳型聚合物破乳剂与未改性聚醚破乳剂相比,脱水速率快,5h相对脱水率达150%以上。
A kind of comb - like polymer demulsifier was synthesized from acrylic acid and polyether as raw material by two- step process comprising esterification and copolymerization. The optimum reaction conditions for esterification and copolymerization were examined respectively.The result showed that the optimum reaction conditions were respectively as follows： for esterification, molar ratio of polyether to acrylic acid 1 ： 1, p - toluene sulphonic acid as catalyst for esterification 4% （based on the total mass of polyether and acrylic acid）, hydroquinone monomethyl ether as polymerization inhibitor 0.6 % （based on the mass of acrylic acid）, xylene as water carrying agent with solid content of 40%, esterification time of 4 hours;for polymerization, benzoyl peroxide as initiator 10 % （based on the mass of acrylic acid） ,mass ratio of acrylic acid to esterifying agent 1：6,polymerization temperature 80 90 ℃ and polymerization time 3.5 hours. The product synthesized by two step process had higher dehydration rate （over 150%） and longer effects compared with the unmodified polyether as demulsifier.
出处
《精细石油化工进展》
CAS
2005年第11期4-8,共5页
Advances in Fine Petrochemicals
关键词
破乳剂
梳型聚合物
酯化
共聚合
脱水率
demulsifier, comb - like polymer, eterifieation, copolymerization, dehydration rate
