广州化工
廣州化工
엄주화공
Guangzhou Chemical Industry
2015年
18期
91-93
,共3页
草酸二甲酯%乙醇酸甲酯%催化加氢
草痠二甲酯%乙醇痠甲酯%催化加氫
초산이갑지%을순산갑지%최화가경
dimethyl oxalate%methyl glycollate%catalytic hydrogenation
对草酸二甲酯固定床连续催化加氢法制备乙醇酸甲酯进行了研究,采用自制的复合CuO-Ag2 O/SiO2固体催化剂,考察了反应温度、反应压力、氢酯比和液时空速对草酸二甲酯转化率和乙醇酸甲酯选择性的影响。结果表明：在反应温度230℃,压力2.0 MPa,氢酯比30∶1,液时空速0.8 h-1条件下,草酸二甲酯转化率可以达到92.3%,乙醇酸甲酯选择性可以达到83.6%,反应连续运行500 h,草酸二甲酯转化率稳定在90%左右,乙醇酸甲酯选择性稳定在80%左右,表明催化剂有较高的催化活性和稳定性。
對草痠二甲酯固定床連續催化加氫法製備乙醇痠甲酯進行瞭研究,採用自製的複閤CuO-Ag2 O/SiO2固體催化劑,攷察瞭反應溫度、反應壓力、氫酯比和液時空速對草痠二甲酯轉化率和乙醇痠甲酯選擇性的影響。結果錶明：在反應溫度230℃,壓力2.0 MPa,氫酯比30∶1,液時空速0.8 h-1條件下,草痠二甲酯轉化率可以達到92.3%,乙醇痠甲酯選擇性可以達到83.6%,反應連續運行500 h,草痠二甲酯轉化率穩定在90%左右,乙醇痠甲酯選擇性穩定在80%左右,錶明催化劑有較高的催化活性和穩定性。
대초산이갑지고정상련속최화가경법제비을순산갑지진행료연구,채용자제적복합CuO-Ag2 O/SiO2고체최화제,고찰료반응온도、반응압력、경지비화액시공속대초산이갑지전화솔화을순산갑지선택성적영향。결과표명：재반응온도230℃,압력2.0 MPa,경지비30∶1,액시공속0.8 h-1조건하,초산이갑지전화솔가이체도92.3%,을순산갑지선택성가이체도83.6%,반응련속운행500 h,초산이갑지전화솔은정재90%좌우,을순산갑지선택성은정재80%좌우,표명최화제유교고적최화활성화은정성。
Methyl glycollate was obtained through continuous catalytic hydrogenation of dimethyl oxalate in fixed bed reactor using CuO-Ag2 O/SiO2 as a solid catalyst. The effects of reaction temperature, reaction pressure, hydrogen/dimethyl oxalate molar ratio, liquid hourly space velocity ( LHSV ) were studied. Under the conditions of reaction temperature 110 ℃, pressure 2. 0 MPa, hydrogen/dimethyl oxalate molar ratio 30∶1, LHSV 0. 8 h-1 , the conversion of dimethyl oxalate and the selectivity of methyl glycollate could achieve 92. 3% and 83. 6%, respectively. The conversion of dimethyl oxalate and the selectivity of methyl glycollate could remain 90% and 80%, respectively, after the solid catalyst was reused 500 h. The experimental results indicated that the solid catalyst of CuO-Ag2 O/SiO2 had a higher activity and stability on the catalytic hydrogenation of dimethyl oxalate to produce methyl glycollate.
