Abstract A novel Nieuwland catalytic system, containing 5 mol% of 4-hydrazinylbenzenesulfonic acid ( S 8 ), was developed and exhibited an excellent catalytic performance and good stability in the acetylene dimerization reaction. The acetylene conversion reached 57.1%, while the selectivity of monovinylacetylene (MVA) was 75.1%. The yield of MVA was maintained at 42.9% under an acetylene gas hourly space velocity (GHSV) of 80 h −1 at 80 °C, which was increased by 18.8% over the control Nieuwland catalytic system. The addition of S 8 increased the dissolution of CuCl in water, inhibited the polymer formation, and hindered the Cu + loss during the reaction process, thus improving the activity and the long-term stability of the modified Nieuwland catalyst. Graphic Abstract

中文翻译：

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用于乙炔二聚反应的肼基苯磺酸改性Nieuwland催化剂

摘要 开发了一种含5 mol% 4-肼基苯磺酸(S 8 )的Nieuwland催化体系，该体系在乙炔二聚反应中表现出优异的催化性能和良好的稳定性。乙炔转化率达到57.1%，而单乙烯基乙炔（MVA）的选择性为75.1%。在 80 ℃、80 h -1 的乙炔气时空速 (GHSV) 下，MVA 的产率保持在 42.9%，比对照 Nieuwland 催化系统提高了 18.8%。S 8 的加入增加了CuCl在水中的溶解，抑制了聚合物的形成，阻碍了反应过程中Cu + 的损失，从而提高了改性Nieuwland催化剂的活性和长期稳定性。图形摘要