CAJ | 학술논문

考察了几种催化剂（硫酸，HZSM-5分子筛，酸性阳离子交换树脂）在甲醇（MeOH）和多聚甲醛（POM）制备聚甲醛二甲醚（PODEn）反应中的催化活性，并对PODEn合成的反应动力学进行了研究，建立了多步串联的反应动力学模型，通过测量在不同温度下的表观反应速率，得到了PODEn合成反应动力学方程。结果表明：以硫酸为催化剂，在温和条件下反应，催化活性较佳，甲醇的转化率可达90.1%，目标产物PODEn（n 为2～5）的收率可达47.8%；各步串联反应级数均为1，各串联反应的活化能随产物PODEn聚合度的增加依次降低。
고찰료궤충최화제（류산，HZSM-5분자사，산성양리자교환수지）재갑순（MeOH）화다취갑철（POM）제비취갑철이갑미（PODEn）반응중적최화활성，병대PODEn합성적반응동역학진행료연구，건립료다보천련적반응동역학모형，통과측량재불동온도하적표관반응속솔，득도료PODEn합성반응동역학방정。결과표명：이류산위최화제，재온화조건하반응，최화활성교가，갑순적전화솔가체90.1%，목표산물PODEn（n 위2～5）적수솔가체47.8%；각보천련반응급수균위1，각천련반응적활화능수산물PODEn취합도적증가의차강저。
A series of catalysts(sulfuric, HZSM-5 molecular sieve and acidic cation exchange resin) were investigated for the synthesis of polymethoxy dimethyl ethers(PODEn) from methanol(MeOH) and paraformaldehyde(POM) in a bath stirred autoclave. The kinetics model of cascade reactions was established, the apparent reaction rate of PODEn synthesis was measured in a batch stirred reactor using sulfuric acid as catalyst under different temperature to obtain kinetics equation. The results showed that using sulfuric acid as catalyst, the conversion of MeOH was 90.1% and yield of PODEn (n was 2-5)was 47.8% under mild reaction conditions. It was found that the reaction order of each step was one and the activation energy of PODEn synthesis decreased with the increase of the degree of polymerizationn based on the kinetics.