精细与专用化学品
精細與專用化學品
정세여전용화학품
FINE AND SPECIALTY CHEMICALS
2012年
2期
47-50
,共4页
负载型催化剂%杂多化合物%乙苯%双氧水
負載型催化劑%雜多化閤物%乙苯%雙氧水
부재형최화제%잡다화합물%을분%쌍양수
supported catalyst%heteropoly compounds%ethylbenzene%hydrogen peroxide
采用浸渍法制备了系列负载型杂多酸盐催化剂,并将其应用于乙苯氧化合成苯乙酮的反应中。考察了载体类型、负载量、焙烧温度、催化剂用量、反应时间等因素对催化活性的影响。结果表明,以HZSM-5为载体,杂多酸盐Co_4HP_2Mo_(15)V_3O_(62)负载量30%,固定乙苯用量25mmol,催化剂用量0.4g,m(催化剂):m(KBr)=2:3,n(乙苯):n(过氧化氢)=0.125:1,反应温度80℃.反应时间1h,乙苯转化率达到82.21%,苯乙酮收率为55.75%。
採用浸漬法製備瞭繫列負載型雜多痠鹽催化劑,併將其應用于乙苯氧化閤成苯乙酮的反應中。攷察瞭載體類型、負載量、焙燒溫度、催化劑用量、反應時間等因素對催化活性的影響。結果錶明,以HZSM-5為載體,雜多痠鹽Co_4HP_2Mo_(15)V_3O_(62)負載量30%,固定乙苯用量25mmol,催化劑用量0.4g,m(催化劑):m(KBr)=2:3,n(乙苯):n(過氧化氫)=0.125:1,反應溫度80℃.反應時間1h,乙苯轉化率達到82.21%,苯乙酮收率為55.75%。
채용침지법제비료계렬부재형잡다산염최화제,병장기응용우을분양화합성분을동적반응중。고찰료재체류형、부재량、배소온도、최화제용량、반응시간등인소대최화활성적영향。결과표명,이HZSM-5위재체,잡다산염Co_4HP_2Mo_(15)V_3O_(62)부재량30%,고정을분용량25mmol,최화제용량0.4g,m(최화제):m(KBr)=2:3,n(을분):n(과양화경)=0.125:1,반응온도80℃.반응시간1h,을분전화솔체도82.21%,분을동수솔위55.75%。
A series of supported heteropoly acid salt catalysts were prepared by impregnation method.The catalytic activity of the catalyst for the oxidation of ethylbenzene to acetophenone with H_2O_2 and the effects of reaction conditions were studied.Experimental results show that HZSM-5 as carrier,the conversion of ethylbenzene was 82.21%and the yield of acetophenone was 55.75%under the follow conditions:loading of Co,HP_2 Mo_(15) V_3 O_(62) was 30%,the amount of ethylbenzene 25mmol,catalyst 0.4g,n(ethylbenzene):n (H_2O_2) =0.125:1,m(Cat):m(KBr) =2:3,reaction time 1h,the temperature 80℃.