1-丁烯羰基合成戊醛的工艺

Preparation of Valeraldehyde from 1-Butene by Oxo Synthesis

采用连续实验装置,以1-丁烯和合成气为原料、三苯基膦乙酰丙酮羰基铑为催化剂,经羰基合成反应制备了戊醛.考察了反应温度、反应压力、催化剂用量及合成气中H2与CO的配比对合成反应的影响.实验结果表明,提高反应温度、增加反应压力和催化剂用量可明显提高1-丁烯的转化率,反应压力和催化剂含量对戊醛选择性的影响较小;降低反应压力或提高合成气中H2分压,可显著提高产物中正戊醛的含量.在100℃、1.5 MPa、反应液中铑含量250 lg/g、原料气中n（H2）：n（CO）=1.9～2.0的条件下,1-丁烯转化率为85％～90％,戊醛选择性在95％以上,产物中正戊醛与2-甲基丁醛的摩尔比为8～11.

The oxo synthesis of valeraldehyde from 1-butene and syngas with triphenylphosphine rhodium complex as catalyst was studied in a continuous experimental set-up. The effects of reaction temperature, reaction pressure, catalyst content and syngas composition on the oxo synthesis were investigated. The results showed that, raising the reaction temperature, reaction pressure and catalyst content could obviously improve the conversion of 1-butene, the reaction pressure and catalyst content had a little influence on the selectivity to the product valeraldehyde, reducing the reaction pressure or heightening H2 content in the syngas could significantly increase the content of n-valeraldehyde in the products. Under the reaction conditions of reaction temperature 100℃, reaction pressure 1.5 MPa, rhodium concentration 250 ktg/g in the reaction liquid and mole ratio of H： to CO in the syngas 1.9- 2.0, the conversion of 1-butene, selectivity to valeraldehyde and mole ratio of n-valeraldehyde to 2-metyl butaldehyde in the products reached 85%-90%, more than 95% and 8-11.