【摘 要】
:
Poly-α-olefin (PAO) synthetic oil is the base oil of high-quality lubricants, and has a huge market potential. We illustrate PAO synthesis by catalytic polymer
【机 构】
:
Daqing Petrochemical Research Center of PetroChina, Daqing 163714;Northeast Petroleum University, Da
论文部分内容阅读
Poly-α-olefin (PAO) synthetic oil is the base oil of high-quality lubricants, and has a huge market potential. We illustrate PAO synthesis by catalytic polymerization of 1-decene with a boron trifluoride (BF3)/alcohol system. Gas chromatography-mass spectrometry, proton nuclear magnetic resonance and 13C nuclear magnetic resonance analysis confirmed dimer, trimer and tetramer structures of PAO. Each component contained branched chains with a 1,2 insertion of a head-to-tail link; a 2,1 insertion of a tail-to-tail link and a methyl-containing linked structure. At a low conversion rate, the reaction rate was related directly with the reaction temperature and the catalyst/1-decene concentration. An apparent kinetic equation for PAO formation was determined during 1-decene polymerization.
其他文献
经济学理论可以运用到各行各业的经济或经营活动中去,但需要与各行各业的特点相结合。媒体及其有线有其独特的经济特性或特点。媒体的四大经济特性媒体的第一大特性就是公共
请下载后查看,本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
请下载后查看,本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
(一)猪肺疫 猪肺疫由巴氏杆菌引起,虽然属于老病,但每年冬季都有散发,最近发生的病例多为猪肺疫与温和型猪瘟、圆环病毒病、蓝耳病的混合感染.猪肺疫单独感染时,主要表现是呼
(一)发生原因 孕羊既要供给自身营养,又要满足胎羔生长发育,加之冬季温度低、光照少,孕羊到圈舍外受阳光照射产生的维生素D相应减少,孕羊越冬若不及时补充钙、磷及维生素D等
溪口这个古老的小镇,闻名天下不仅仅是因为出了一代民国风云人物——蒋介石、蒋经国父子,这是因为溪口是一座典型的江南小镇,四面环山,田地纵横,桃园连绵,九曲剡溪婉诞而下。
请下载后查看,本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
在肉鸡的饲养过程中,由于饲养周期短,养殖户往往会掉以轻心,由于这样那样的原因而造成鸡群发生疾病,从而会造成鸡群大量伤亡,严重威胁养鸡业的发展,因此加强饲养管理,科学喂
请下载后查看,本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
1.呋喃唑酮(痢特灵):连续长期使用,可引起出血综合症.rn2.喹乙醇:在饲料中添加可促进畜禽生长.但它有致突变、致癌的作用.