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etherified product
相关语句
  醚化产品
     The methods including gas chromatography-mass spectrometry,gas chromatography-infrared spectroscopy,chromatographic retention value,chemical reaction and percent conversion of etherification were used to identify the components,especially the active olefins in fluid catalytic cracked light gasoline and ethers in etherified product. The content of ethers in etherified product was determined by the peak area normalization method.
     采用气相色谱 -质谱、气相色谱 -红外、色谱保留值法、化学法、转化率计算法等技术对催化裂化轻汽油中的组分特别是活性烯烃及其醚化产物进行了结构确定 ,用色谱峰面积校正归一法测定醚化产品中醚的含量 ;
短句来源
  醚化产物
     The Analysis of Etherified Product of Light Gasoline by Gas Chromatography
     轻汽油醚化产物的气相色谱分析
短句来源
     Two unexpected ethers (methyl etherified product 9 and dimerized ether 10) were formed in this reduction if the workup procedure is not controlled carefully. The structure of 9 was determined by X ray diffraction analysis and the mechanism of etherification was proposed. 1 Hydroxy group of 5 is easy to form its ether derivative 10 through an intramolecular catalysis of carbon cation formation, followed by the reaction with compound 5 itself.
     条件控制不当易产生两个意外的醚化产物 4 氯 1 甲氧基 7 羟基二氢化茚 ( 9)和自身醚化产物 10 ,9的结构经X射线单晶衍射分析确证 ,并提出生成 10的可能机理为 5的醇羟基极易通过分子内催化形成碳正离子、进而与另一分子 5形成自身醚化产物 10 .因此 ,还原反应完成后的后处理应避免长时间放置和加热 ,以减少醚化产物的生成 .
短句来源
     The methods including gas chromatography-mass spectrometry,gas chromatography-infrared spectroscopy,chromatographic retention value,chemical reaction and percent conversion of etherification were used to identify the components,especially the active olefins in fluid catalytic cracked light gasoline and ethers in etherified product. The content of ethers in etherified product was determined by the peak area normalization method.
     采用气相色谱 -质谱、气相色谱 -红外、色谱保留值法、化学法、转化率计算法等技术对催化裂化轻汽油中的组分特别是活性烯烃及其醚化产物进行了结构确定 ,用色谱峰面积校正归一法测定醚化产品中醚的含量 ;
短句来源
  “etherified product”译为未确定词的双语例句
     The polymerization conversion of diene in light FCC gasoline and gum content in etherified product increases or decreases with the reaction temperature increasing or decreasing.
     随着反应温度的提高 ,轻汽油中二烯烃聚合转化率增大 ,产品中胶质质量分数增加。
短句来源
  相似匹配句对
     Advance in the Etherified Alkyl-capped Polyether
     醚化封端聚醚的技术进展
短句来源
     The Application of Etherified Amino as the Curing Agent for Aminoplastics
     醚化三聚氰胺作氨基塑料固化剂
短句来源
     Analysis of FCC Light Gasoline and It′s Etherified Products
     催化裂化轻汽油及其醚化产品的分析
短句来源
     The Analysis of Etherified Product of Light Gasoline by Gas Chromatography
     轻汽油醚化产物的气相色谱分析
短句来源
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A practical method for the preparation of Armillarisin A is described. The key intermediate, 3, 5-dihydroxyphenylcarbinol, was prepared through etherification of methyl 3, 5-dihydroxybenzoate with benzylchloride in the presence of potassium carbonate and catalytic amount of potassium iodide, and then reduction of the etherified product by potassium boronhydride-Lithium chloride, and finally debenzylation by hydrogenation over 5% Pd/C, the yield of this step being 71%.Armillarisin A was prepared through...

A practical method for the preparation of Armillarisin A is described. The key intermediate, 3, 5-dihydroxyphenylcarbinol, was prepared through etherification of methyl 3, 5-dihydroxybenzoate with benzylchloride in the presence of potassium carbonate and catalytic amount of potassium iodide, and then reduction of the etherified product by potassium boronhydride-Lithium chloride, and finally debenzylation by hydrogenation over 5% Pd/C, the yield of this step being 71%.Armillarisin A was prepared through the direct condensation of 3, 5-dihydroxyphenylcarbinol with ethyl ethoxymethylene acetylacetate in the presence of sodium ethoxide, the yield being 60~70%. The overall yield was 40% (on the basis of benzoic acid).

亮菌甲素为治疗急性胆道感染的一个新的有效药物。为了改进其合成方法和提高收率,以期能过渡到工业生产,采用碘化钾为催化剂,以氯化苄使3,5-二羟基苯甲酸甲酯苄醚化得(Ⅳ),反应时间缩短,收率达80~90%,然后用四氢硼钾和氯化锂还原,5%pd/c接触氢解去苄基得定量产率的(Ⅴ),原合成路线中甲酰化与缩合改为(Ⅴ)与α-乙氧亚甲基乙酰乙酸乙酯在醇钠存在下直接缩合而得(Ⅵ),总收率达40%左右(以苯甲酸计算)。

Using the cassava oxidized starch has been synthesized carbamoylethyl starch(CES)with different degrees of substitution( D.S ).By analyzing the effect of the concentration of NaOH,reaction time,reaction termperature and the weight of acrylamide on the D.S (N). D.S (Na)of etherified products and the total rate of etherification,we studied the side reaction of synthesizing carbamoylethyl starch.Results show that the extent of reaction of strach with acrylamide is governed by aforementioned factors.Furthermore,the...

Using the cassava oxidized starch has been synthesized carbamoylethyl starch(CES)with different degrees of substitution( D.S ).By analyzing the effect of the concentration of NaOH,reaction time,reaction termperature and the weight of acrylamide on the D.S (N). D.S (Na)of etherified products and the total rate of etherification,we studied the side reaction of synthesizing carbamoylethyl starch.Results show that the extent of reaction of strach with acrylamide is governed by aforementioned factors.Furthermore,the best etherification conditions are the weight of acrylamide[0 2mol/mol (starch)],the concentration of NaOH(0 1 mol/L),reaction temperature(40℃),reaction time (4h).When the side effcct on carbamoylethylation is the weakest,the total of rate of etherification reaches 72 6%.

本文以木薯氧化淀粉为原料,合成了不同取代度(D.S)的氨基甲酰乙基淀粉,通过研究氢氧化钠浓度、反应温度、反应时间及丙烯酰胺用量对醚化产物中酰胺基取代度、羧基取代度及总醚化效率的影响,探讨了氨基甲酰乙基淀粉(CES)合成中的副反应。结果表明:氨基甲酰乙基化反应程度受上述因素制约。最佳醚化条件为:0.2m ol/m ol(淀粉),c(NaOH)= 0.10m ol/L,40℃,反应4h。在此条件下氨基甲酰乙基淀粉的相对水解度最小,且醚化效率最大,可达72.6% 。

The hybrid process of distillation side-connected with pervaporation for the separation of C 4 etherified products was simulated with the HYSIM modeling system.A pervaporation unit was used to remove a definite quantity of methanol from the azeotrope of C 4 and methanol.The retentate was recycled back to the upper-section of the distillation tower.When a definite quantity of methanol,which was equal to that in the distillation feed...

The hybrid process of distillation side-connected with pervaporation for the separation of C 4 etherified products was simulated with the HYSIM modeling system.A pervaporation unit was used to remove a definite quantity of methanol from the azeotrope of C 4 and methanol.The retentate was recycled back to the upper-section of the distillation tower.When a definite quantity of methanol,which was equal to that in the distillation feed was removed by the distillation-side-connected pervaporation unit,and at the meantime the reflux ratio exceeded the critical value,a qualified top product with methanol composition below 1×10 -4 was obtained.Both plug-flow and perfect-mixed type pervaporation units have been considered.Simulation results show that the pervaporation unit of plug-flow requires only 64%~90% of membrane area compared to that of perfect-mixed type.If the reserved membrane area is sufficient,the hybrid process can adapt to the composition fluctuation of MTBE reactor effluent. [

利用HYSIM软件系统 ,采用平推流与全混流两种进料方式的渗透汽化工艺 ,对醚化后C4产物分离的蒸馏 -渗透汽化集成过程进行模拟 ,计算了回流比、侧线出料量、侧线进出口位置、进料及返回液中甲醇含量等操作条件对产物的影响。结果表明 ,平推流进料所需膜面积仅为全混流的 64 %~ 90 %。当蒸馏段侧线渗透汽化装置中脱除的甲醇与进料甲醇等量时 ,塔顶产品不经水洗就可使甲醇摩尔分数降低到 1× 10 - 4 以下

 
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