| 天然气—CO2—O2—H2O蒸气转化制合成气工艺条件的研究 |
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| 引用本文： | 张光林,周汉.天然气—CO2—O2—H2O蒸气转化制合成气工艺条件的研究[J].哈尔滨师范大学自然科学学报,2000,16(2):69-71. |
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| 作者姓名： | 张光林 周汉 |
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| 作者单位： | 哈尔滨师范大学 |
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| 摘 要： | 考察了天然气、ＣＯ２、Ｏ２和水蒸气转化制合成气的还原温度、反应温度、反应压力、空速和原料配比对反应的影响，确定了适宜的工艺条件。
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| 关 键 词： | 合成气 天然气 工艺条件 二氧化碳 氧气 水蒸气 |
| 修稿时间： | 2000年1月6日 |
STUDY ON REACTION CONDITIONSOF NATURAL GAS WITH CARBON DIOXIDE,OXYGENAND STEAM TO PRODUCE SYNGAS |
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| Liu Xiangyun,Mo Xin,Liu Xiaorui.STUDY ON REACTION CONDITIONSOF NATURAL GAS WITH CARBON DIOXIDE,OXYGENAND STEAM TO PRODUCE SYNGAS[J].Natural Science Journal of Harbin Normal University,2000,16(2):69-71. |
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| Authors: | Liu Xiangyun Mo Xin Liu Xiaorui |
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| Institution: | Harbin Normal University |
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| Abstract: | The previous process of synthesizing ursodeoxycholic acid is very complex and the yield is very low.First,cholic acid is extracted from bile of cattle and sheep and converted to chenodeoxycholic acid through several complex reactions.Second,the carboxylic group is protected by methyl esterazation and then the protected chenodeoxycholic acid is converted to methyl ursodeoxycholate by hydrogenization with benkeser reaction.Last,ursodeoxycholic acid is obtained by demethyl ester treatment.The new synthetic process is that chenodeoxycholic acid is directly extracted and separated from bile of chicken and is reduced to ursodeoxycholic acid by hydrogenizing with a high stereospecific catalyst.The synthetic process is not only greatly simplified and cost is reduced,but the comprehensive conversion rate is increased from previous 50 percent to now over 65 percent. |
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| Keywords: | Cholic acid Chenodeoxycholic acid High stereospecific catalyst Ursodeoxycholic acid |
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