Advances in Technology for Preparation of Acetylene via Partial Oxidation of Natural Gas

This article introduces the latest advances achieved by the Sichuan Vinylon Plant in the fields of maintaining the stable operation of acetylene reactors, extending the operating cycle of production equipment, adaptation to the composition of different natural gas feeds and enlarged scale of production facilities. And a forward-looking idea on next step of technology for manufacture of acetylene from natural gas has been set forth.

周必大编《欧阳文忠公集》宋刻三版考

周必大编校之《欧阳文忠公集》一百五十三卷《年谱》一卷《附录》五卷本,对欧阳脩别集整理贡献卓著。通过版本调查和文献考察可以明确,周必大编欧集在宋代共刻三版,包括周必大庆元二年(1196)吉州原刻本、周必大之子周纶开禧、嘉定之际吉州翻刻本和欧阳脩五世孙欧阳伋嘉定初饶州翻刻本,分别以国图傅增湘旧藏本、国图铁琴铜剑楼旧藏本、天理本为代表。周必大原刻本刊成后不久,就不断通过修版、增刻的方式来完善此本,修版、增刻当不少于四次,而今存的周必大吉州本共有三种印次。存世周必大本最早印本,已非初刻初印本,而存世最晚印本印行之后,尚有修版与增刻,但并无印本存世。周纶本、欧阳伋本所依底本,均为今已不存的经过多次修版、增刻的周必大原刻更晚印本,故二本之中,均添入了佚文、佚简等,而部分欧阳脩文,亦更换版本,校记续有增添。周纶吉州本翻刻时,改换了部分卷行款,在完成雕版后不久,请曾三异校勘欧阳脩孙欧阳恕宣和五年写本,所得校记,以修版的方式添入。欧阳伋饶州本依周必大原刻更晚印本的行款翻刻,刊行后亦经修版。厘清周必大编本宋刻三版情况,对了解明以后欧集源流亦有帮助。