环己烷

Almost 100% selectivity to cyclohexene could be obtained when the molar ratio of acetic acid to cyclohexane was 12.9∶1 at 450 ℃, the conversion of cyclohexane was 6.9%.

反应温度为450 ℃，醋酸与环己烷的摩尔比为12.9∶1时，环己烷的转化率为6.9%，环己烯的选择性为100%。

The commercial process of cyclohexane oxidation to cyclohexanone and cyclohexanol shows low conversion, poor selectivity, high-energy consumption and environmental pollution. It is of great academic and practical importance to study and develop highly efficient and environmentally friendly catalytic cyclohexane oxidation processes.

现有的环己烷氧化制环己酮生产工艺，存在转化率低、选择性差、能耗高以及污染环境的缺点，研究和开发高效、环境友好的环己烷催化氧化工艺具有重要的理论意义和实用价值。

The commercial processes of cyclohexane oxidation to cyclohexanone and cyclohexanol generally show many problems, such as low conversion, poor selectivity, complicated technology, high-energy consumption and environmental pollution. So it seems to be of great academic and practical interesting to study and develop highly efficient and environmentally friendly catalytic cyclohexane oxidation processes.

现有的环己烷氧化制环己酮和环己醇生产工艺普遍存在转化率低、选择性差、工艺复杂、耗能大和对环境污染严重等问题，这就使得研究和开发高效、环境友好的环己烷催化氧化工艺具有重要的理论意义和实用价值。

Under the conditions of n∶n = 1∶100,95 ℃ and 6 h,the conversion of nitrocyclohexane reached to 100% and the selectivity for cyclohexanone oxime was 84.2%.

在催化剂与硝基环己烷摩尔比为1∶100、反应温度95 ℃的条件下，反应6 h后的硝基环己烷转化率可达100%，环己酮肟选择性可达84.2%。

The dominant techniques of cyclohexanone synthesis from cyclohexane by catalytic oxidation were introduced.

介绍了以环己烷为原料催化氧化合成环己酮的主要方法，分析了环己烷氧化采用的主要催化剂。

Particularly,ethylenediamine is an optimal choice for improving the selectivity for cyclohexanone oxime.

在催化剂与硝基环己烷摩尔比为1∶100、反应温度95℃的条件下，反应6h后的硝基环己烷转化率可达100%，环己酮肟选择性可达84.2%。

Using poly (4-merhylpentene-l) as a membrane material and cyclohexane, irich-loroethylene, tetrachloroethylene, mixture of cyclohexane and trichloroethylene or tetrachloro-ethylene as solvents, the solution were cast to form homogeneous dense membranes, and the crystalline properties and surface morphology were investigated by DSC and TEM.

以聚4-甲基戊烯-1为膜材质，分别以环己烷、三氯乙烯、四氯乙烯、环己烷/三氯乙烯及环己烷/四氯乙烯为溶剂，研究了这些溶液浇铸膜的结晶性质和表面形态。结果表明，溶剂对PMP的相对溶解能力和挥发速度同所成膜内PMP的结晶形式和结晶度密切相关；不同溶剂体系的PMP溶液浇铸膜的表面形态也不尽相同。

The reaction conditions of synthesizingcyclohexyl acetate catalyzed with ammonium ferric sulfate dodecahydrate NH4Fe(SO42.12H2Oare studied .The yield of cyclohexyl acetate can reach 87.2% under mole ratio of aceticacid,cyclohexyl alcohol and ammonium ferric sulfate is 1∶0.44∶0.02,cyclohexane as solvent ,refluxing and segregating water for 60min.

研究了NH4Fe(SO4)2.12H2O催化合成乙酸环己酯的反应条件，当乙酸、环己醇和硫酸铁铵的摩尔比为1∶0.44∶0.02，以环己烷为溶剂，回流分水60min，乙酸环己酯收率达87.2%，在相同反应条件下，合成了甲酸环己酯(收率为68.5%)、丙酸环己酯(收率为59.4%)和丁酸环己酯(收率为21.6%)。

Good thermal stability and self-extinguishing behavior was observed with the cured polybenzoxazine resins. Second, furan-containing benzoxazine monomers, P-FBz, BPA-FBz, and 4FP-FBz were prepared using furfurylamine as a raw material. Formation of furfurylamine Mannich bridge networks in the polymerizations of P-FBz and BPA-FBz increased the cross-linking densities and thermal stability of the resulting polybenzoxazines. P-FBz and BPA-FBz- based polymers also exhibited high glass transition temperatures above 300℃, high char yields, and low flammability with a limited oxygen index value of 31. The dielectric (Dk3.21–3.39) and mechanical properties (high storage modulus of 3.0–3.9 GPa and low coefficient of thermal expansion of 37.7– 45.4 ppm) of the P-FBz and BPA-FBz-based polymers were superior or comparable to other polybenzoxazines. 4FP-FBz used for polybenzo- xazine modification by means of formation of benzoxazine hybridation with P-FBz.

第二部份以2-呋喃甲胺为起始物，制备了P-FBz、4FP-FBz与BPA-FBz 三个含呋喃官能基之氧代氮代苯并环己烷的单体；BPA-FBz与P-FBz於开环聚合中形成之Mannich bridge网状结构有效地提升聚氧代氮代苯并环己烷聚合物之交联密度与热安定性；Poly与Poly具有大於300℃之玻璃转移温度、高的焦炭生成率与具有31之极限氧指数(Limited oxygen index， LOI)的难燃性特质，Poly与Poly之介电常数(Dk=3.21~3.39)与机械性质[3.0~3.9 GPa的储存模数与37.7~45.4ppm之低热膨胀系数( Low coefficient of thermal expansion， Low CTE)]均较其他聚氧代氮代苯并环己烷为优；4FP-FBz具有低之介电常数(Dk=2.7)，以其作为降低介电常数之反应型改质剂，与P-FBz混成，证实可有效地降低Poly的介电常数。

The selected process consists of several steps as follows. Firstly, ammonifying the oily mixture of PXA pyrolysis by ammonia or aqueous ammonia, then adding the organic solvent to extra

实验结果表明，合适的分离提纯工艺为：先将裂解产物用氨水氨化、有机溶剂萃取，然后用硫酸酸化11-CUA铵盐水溶液、再将粗品11-CUA于合适介质中结晶，得到高纯度11-CUA晶体；优化工艺条件为：氨化pH值8.0～10.0、温度25-35℃，甲苯为萃取剂，酸化pH值1.5～2.0、温度55-60℃，环己烷为结晶介质，粗品11-CUA在环己烷中溶解温度50～55℃、与环己烷初始质量比4：100、结晶前沉降分层时间10min、结晶温度20℃。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。