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Investigation of Butyl Group Transfer Reaetions of t-Butyl Catechol over Solid Acid Catalysts
Lee, Chul Wee,Park, Sang Eon,Wang, Bo,Cai, Tian Xi 한국공업화학회 2000 Journal of Industrial and Engineering Chemistry Vol.6 No.3
The butyl group transfer reactions of t-butyl catechols were investigated over the zeolite HBEA and super acid SO₄/ ZrO₂. Melting a physical mixture of 3,5-di-tert-butylcatechol (DTBC), catechol and/or 4-tert-butylcatechol (4-TBC) produced a significant conversion, resulting from the thermal reaction. HBEA exhibits a good conversion and selectivity on 4-TBC through the transalkylation of DTBC and catechol. The super acid sulfated zirconia, SO₄/ZrO₂, due to its strong acidity, favors the dealkylation and disproportionation of 4-TBC or/and DTBC, preventing the increase of the selectivity on 4-TBC.
On the security sense of criminals
Zhou Hui,Zhang fei-hu,Sang Tian-Cai 아시아경찰학회 2007 아시아경찰학회 국제학술회의 Vol.2007 No.-
The security sense is one of the five basic needs of human beings including criminals. The security sense of criminals emerged in an explicit or implicit state along with the whole process of criminals` preparation 、choice、committing a crime, escaping、 resisting and returning to the society after remoulding;thus,the investigators fully understand and grasp the psychological and behavioral characteristics of security sense of criminals, which has an important value on preventing and investigating the crime remoulding criminals.