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改良硫酸
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  modified sulfuric acid
     Effects of Reaction Conditions on the Productivity in the Process of Modified Sulfuric Acid Catalytic method to Produce Furfural from Straws
     改良硫酸法制取糠醛——反应条件对出醛率的影响
短句来源
     A method by modified sulfuric acid as a catalyst to produce furfural from cornstalk in Longdong area, Gansu Province, China was presented and the content of furfural had been determined by ultraviolet spectrophotometer. Experiment results showed that the productivity of furfural is(2.76%).
     以甘肃陇东地区玉米秆为原料,采用改良硫酸法制取糠醛,并用紫外分光光度法测定了糠醛含量,出醛率为2.76%。
短句来源
  “改良硫酸”译为未确定词的双语例句
     Improvement of Sulfate ion Detection in Water for the Modified Nephelometry with Barium Sulfate
     对改良硫酸钡比浊法测定水中硫酸根方法的改进
短句来源
     STUDY ON THE NEW TECHNOLOGY FOR COMBINED PRODUCING FURFURAL AND COM-POSITE FERTILIZER BY THE IMPROVED METHOD WITH SULFURIC ACID CATALYSIS
     改良硫酸法制取糠醛联产复合肥新工艺研究
短句来源
     The technology of producing furfural from straw by the modified method of sulfuric acid catalysis
     稻草、麦杆改良硫酸法制取糠醛新工艺研究
短句来源
     The extraction technology has been used to separate furfural produced from straw with the improved sulfuric acid catalytic method. The extractive effect and physical character of different organic solvents have been compared. From the operational lines we will know that the order of extractive rate is:trichlormethane>1,2 dichloroethane>trichloroethylene>dichloromethane>ethyl acetate>carbon tetrachloride.
     采用溶剂萃取法分离和精制改良硫酸法由稻草、麦杆等制取糠醛 ,比较了不同有机溶剂的萃取效果和物性 ,试验结果表明 ,糠醛的分配系数顺序为 :氯仿 >1,2 二氯乙烷 >三氯乙烯 >乙酸乙脂 >四氯化碳。
短句来源
  相似匹配句对
     The content of polysaccharides was determined by modified phenol-sulphate colorimetry.
     以改良苯酚 -硫酸比色法测定含量。
短句来源
     Determination of momordica charantia L. polysaccharide by improved phenol-sulfuric acid method
     改良苯酚-硫酸法测定苦瓜多糖含量
短句来源
     The improvement A.
     改良 A .
短句来源
     Tobramycin Sulfate
     硫酸妥布拉霉素
短句来源
     In breeding of polyploid of Brassica oleracea L.var.
     用改良L.
短句来源
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Silica gel G TLC plate with n-butanol--acetic acid-water (4: 1: 1) as develop-

本文采用硅胶G薄层板,以正丁醇—醋酸—水(4:1:1)为展开剂,分离鉴定了愈喘气雾剂中主药盐酸异丙肾上腺素、愈创木酚甘油醚以及由包装器皿带来的杂质;并以改良的硫酸—甲醛试剂为愈创木酚甘油醚的显色剂,分别在紫外区及可见区对上述两种成份进行定量。其回收率,盐酸异丙肾上腺素为100.0±3.6%,愈创木酚甘油醚为99.3±2.7%(n=7)。

The electrometric titration to determine furfural has been discussed. It

试验用改良硫酸法由稻草(或麦杆)制取糠醛,用电位滴定法测定糠醛蒸馏液中糠醛的含量及产品的纯度,给出了滴定终点的选择依据方法简便易行,准确度达到工业分析的要求图2,表3,参5

This paper studies the process conditions for producing a furfural using the improved method of sulfuric acid catalysis by taking straw and wheat straw as the raw materials. The results show that according to the following conditions:sulfuric acid is 20%(wt),the ratio of liquid to solid is 2.5∶1(wt),the composite additive (Ⅰ)or (Ⅱ)is added in the ratio of 15%~30%(wt),the fufural yield is 70%~80% of its theoretical rate after 2hrs of distillation under the normal pressure and at 100℃.Especially, all the residues...

This paper studies the process conditions for producing a furfural using the improved method of sulfuric acid catalysis by taking straw and wheat straw as the raw materials. The results show that according to the following conditions:sulfuric acid is 20%(wt),the ratio of liquid to solid is 2.5∶1(wt),the composite additive (Ⅰ)or (Ⅱ)is added in the ratio of 15%~30%(wt),the fufural yield is 70%~80% of its theoretical rate after 2hrs of distillation under the normal pressure and at 100℃.Especially, all the residues can be changed into neutral complex fertilizers.

研究了以稻草和麦杆为原料 ,用改良硫酸法制取糠醛的工艺条件 ,结果表明 :用 2 0 %硫酸 (液固为 2 5∶1) ,加入复合添加剂 (Ⅰ )或 (Ⅱ )添加比例为 15 %~ 30 % ,常压 ,10 0℃蒸馏 2h ,出醛率达理论出醛率的 70 %~ 80 % ,废渣全部变为中性复合肥料

 
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