A ring R is a QB-ring provided that aR ＋ bR = R with a, b E R implies that there exists a y E R such that a＋ by ∈ Rq^-1. It is said that a ring R is a JB-ring provided that R/J（R） is a QB-ring, where J（R） is th...A ring R is a QB-ring provided that aR ＋ bR = R with a, b E R implies that there exists a y E R such that a＋ by ∈ Rq^-1. It is said that a ring R is a JB-ring provided that R/J（R） is a QB-ring, where J（R） is the Jacobson radical of R. In this paper, various necessary and sufficient conditions, under which a ring is a JB-ring, are established. It is proved that JB-rings can be characterized by pseudo-similarity. Furthermore, the author proves that R is a JB-ring iff so is R/J（R）^2.展开更多
液相催化交换是氢-水同位素交换工艺的重要技术。本工作采用自行研制的大粒径4 mm柱型Pt-SDB催化剂与4 mm Dixon填料,开展了氢-水交换工艺实验研究。研究结果表明,在填料与催化剂体积填装比为1∶1时,等板高度最低,氢-水交换分离效果最好...液相催化交换是氢-水同位素交换工艺的重要技术。本工作采用自行研制的大粒径4 mm柱型Pt-SDB催化剂与4 mm Dixon填料,开展了氢-水交换工艺实验研究。研究结果表明,在填料与催化剂体积填装比为1∶1时,等板高度最低,氢-水交换分离效果最好;在50℃到70℃之间,随着催化交换反应温度升高,等板高度降低,当温度大于70℃时,等板高度变化不大,最优反应温度为70℃;随着气液比的增加,等板高度增大,气体流速比改变液体喷淋密度对等板高度的影响大。展开更多
文摘A ring R is a QB-ring provided that aR ＋ bR = R with a, b E R implies that there exists a y E R such that a＋ by ∈ Rq^-1. It is said that a ring R is a JB-ring provided that R/J（R） is a QB-ring, where J（R） is the Jacobson radical of R. In this paper, various necessary and sufficient conditions, under which a ring is a JB-ring, are established. It is proved that JB-rings can be characterized by pseudo-similarity. Furthermore, the author proves that R is a JB-ring iff so is R/J（R）^2.
文摘液相催化交换是氢-水同位素交换工艺的重要技术。本工作采用自行研制的大粒径4 mm柱型Pt-SDB催化剂与4 mm Dixon填料,开展了氢-水交换工艺实验研究。研究结果表明,在填料与催化剂体积填装比为1∶1时,等板高度最低,氢-水交换分离效果最好;在50℃到70℃之间,随着催化交换反应温度升高,等板高度降低,当温度大于70℃时,等板高度变化不大,最优反应温度为70℃;随着气液比的增加,等板高度增大,气体流速比改变液体喷淋密度对等板高度的影响大。
