中文摘要：

以聚乙烯吡咯烷酮（PVP）为保护剂，甲醇为还原剂，甲醇-水为溶剂，制备了高分子稳定的铂胶体（PVP-Pt）。以PVP-Pt催化邻氯硝基苯（o-CNB）的催化氢化反应，考察了反应温度、底物浓度、催化剂浓度等因素的影响。当反应温度为30℃，氢气压力为0．1MPa时，o—CNB的转化率可达92．3％，邻氯苯胺的选择性可达75．9％。

英文摘要：

Poly （N-vinyl-2-pyrrolidone） -stabilized platinum colloids （PVP-Pt） were prepared by re- ducing H2PtCl4 · nH2O in methanol -water. PVP-Pt was used as a catalyst for the selective hydrogenation of o-chloronitrobenzene in methanol at 303 K under 0.1 MPa of hydrogen. The influence of reaction temperature, substrate concentration, catalyst concentration on the hydrogenation was investigated. Under the conditions at 30 ℃and 0.1 MPa of hydrogen, the conversion of o-chloronitrobenzene reached 92.3% and the selectivity for o-chloroaniline was 76.9%.