The preparation of cyclopentadiene from dicyclopentadiene by liquid phase cracking method with the device of continuous reaction-rectification was studied.

本文研究了采用连续反应-精馏装置，由双环戊二烯进行液相热分解制备环戊二烯的工艺方法。

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The gas phase oxidative cracking (GOC) processes of decalin and cyclohexane were investigated by using the quartz tube reactor at atmospheric pressure.

采用石英管反应器，在常压下研究了十氢萘和环己烷的气相氧化裂解(GOC)过程。

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The results show that the cracking of the pump body resulted from the interaction of phase transformation and heat stress, as well as the poor quality of metallurgy.

结果表明：泵体裂纹为相变应力和热应力以及材质冶金质量不高共同作用而产生。

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With the EPA currently cracking down on its R-22 phase out and severely limiting the virgin R-22 production, R-22 prices tripled in 2012 and will likely move up materially again in 2013.

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The first phase of the plan was supposed to have ended by now: it involves Palestinians reforming their government and cracking down on terrorism, and the Israelis withdrawing their troops from Palestinian cities, dismantling new settlement outposts and freezing further building in the West Bank and Gaza.

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