Preparation of a new solid acid and its catalytic performance in di(1-naphthyl)methane hydrocracking

A new solid acid was prepared by trifluoromethanesulfonic acid （TFMSA） impregnation into an acid‐treated attapulgite （ATA）. Di（1‐naphthyl）methane （DNM） hydrocracking was used as the probe reaction to evaluate the catalytic performance of TFMSA/ATA for cleaving Car–Calk bridged bonds in coals. The results show that DNM was specifically hydrocracked to naphthalene and 1‐methylnaphthalene over TFMSA/ATA in methanol in the absence of gaseous hydrogen. In partic‐ular, TFMSA/ATA was demonstrated to be stable after four cycles with slight loss in catalytic activi‐ty. Furthermore, a proposed H＋transfer mechanism successfully interprets the TFMSA/ATA‐cata‐lyzed hydrocracking reaction of DNM.

101.6mm煤层气钻井专用钻杆研制与应用

针对煤层气钻井井眼小、曲率大、煤层松散的特点,提出煤层气钻井专用钻杆的设计思路。通过减小接头外径、采用接头与管体等径设计,增大了井眼环空间隙,提升了煤层钻井颗粒的携带能力,提高了井壁稳定性;通过1∶16的锥度设计、非对称牙型角设计、减小螺纹牙高、增大螺纹牙根圆角半径、在双台肩结构基础上增加公接头大端长度,降低了螺纹应力集中,研制出101.6mm高抗扭、高抗疲劳的煤层气钻井专用钻杆。在郑试1平-5H井使用效果良好,在定向造斜和水平钻井过程中均表现优良的使用性能。

二吲哚基甲烷及其衍生物的合成与表征

介绍了3,3′-二吲哚基甲烷(D IM)及其衍生物3,3′-二(5-溴吲哚)基甲烷(BB IM)和3,3′-二(5,6-二氯吲哚)基甲烷(BC IM)的合成方法。该方法以吲哚、5-溴-1-氢吲哚和5,6-二氯-1-氢吲哚为原料,在酸性条件下与N-羟甲基丙烯酰胺反应分别得到D IM、BB IM和BC IM,收率分别为90.3%、46.3%和53.3%。通过IR1、HNMR、13CNMR和元素分析对D IM的结构进行了表征,通过IR、1HNMR对BB IM和BC IM的结构进行了表征。