Re2O7 is used to convert guaiacol in ethanol at 320 °C. Guaiacol is deoxygenated and alkylated, and the major products are phenol and alkylphenols (including ethylphenol, diethylphenol, diisopropylphenol, di-tert-butylphenol and 2,6-di-tert-butyl-4-ethylphenol), accounting for 97 mol% of all products. Both catechol and phenol are the intermediates of guaiacol demethoxylation. Among the substituents
Re 2 O 7用于在320°C下将愈创木酚转化为乙醇。愈创木酚经过脱氧和烷基化处理,主要产物为苯酚和烷基酚(包括乙基苯酚,二乙基苯酚,二异丙基苯酚,二叔丁基苯酚和2,6-二叔丁基-4-乙基苯酚),占全部的97摩尔%。产品。儿茶酚和苯酚都是愈创木酚脱甲氧基化的中间体。在取代基中,乙基直接由乙醇提供,而异丙基和叔丁基是通过逐步将甲基加成至乙基而形成的。另外,Re 2 O 7对于苯环的饱和具有微不足道的活性,因此它不会引起还原剂的过度消耗。愈创木酚脱甲氧基化的实际催化剂可能是ReIV-VI种。
One-pot production of hydrocarbon oil from poly(3-hydroxybutyrate)
作者:Shimin Kang、Jian Yu
DOI:10.1039/c4ra00892h
日期:——
phosphoric acid (H3PO4) solution at mild temperatures (165–240 °C). PHB and crotonic acid (C4H6O2), a dominant thermal degradation product of PHB, were deoxygenated mainly via decarboxylation, generating similar liquid and gaseous products. Carbondioxide and propylene were the major products in gas phase with little CO formation. The hydrocarbon oil (C4–C16) is a mixture of alkanes, alkenes, benzenes and
聚(3-羟基丁酸酯)(PHB)是许多微生物物种的能量存储材料,并且已被发现是生产可再生烃油的有效原料。在温和的温度(165–240°C)下,在磷酸(H 3 PO 4)溶液中可获得很高的含油量(高达38.2 wt%)。PHB和巴豆酸(C 4 H 6 O 2)是PHB的主要热降解产物,主要通过以下方式脱氧脱羧,生成类似的液体和气体产物。二氧化碳和丙烯是气相的主要产物,几乎没有一氧化碳的形成。烃油(C4-C16)是烷烃,烯烃,苯和萘的混合物。芳香族化合物(C10–C15)是100 wt%H 3 PO 4溶液中的主要烃,而稀释溶液(50 wt%至85 wt%H 3 PO 4)中则优选烯烃和烷烃(C4-C9 )。H 3 PO 4的浓度是影响油的组成和产率的关键因素。巴豆酸在220°C下高效脱羧3小时,导致70.8 wt%的氧气作为CO 2被去除碳的57.0重量%作为烃油被回收。H 3 PO 4溶液可