The conversion-per-pass is generally low, thus necessitating gas recycle to increase overall product yield.
其单程转化率一般是低的，因此有必要使气体循环以提高总的产品收率。
Dimethylethanolamine (DMEA) is an important chemical product, but there exists low yield disadvantage in its current synthesis technique because of many side reactions.
二甲基乙醇胺(DMEA)是一种重要的化工产品，其现有的合成工艺由于存在副反应导致收率较低。
This process had some advantages, such as high yield, high product quality, low cost and no large amounts of waste sulfuric acid.
此种方法合成四氯苯酐具有产品产率高、质量好、成本低且不产生大量废硫酸的优点。
It overcomes the drawback of DMC low yield in traditional technology, raises the output of the product DMC and decreases the consumption of energy.
克服了传统工艺碳酸二甲酯收率低的弊端，提高了产品的产量，降低了能源消耗。
The initial operation show that the unit is stable in operation, high in middle distillate yield, good in product quality and low in energy consumption.
该装置的初期运行表明，装置运行平稳，中间馏分油收率高，产品质量优良，能耗较低。
Sulfuric acid was used as a catalyst to prepare acetic esters with more by-product, low yield, equipment corrosion and acid wastewater.
由于硫酸作催化剂合成羧酸酯副产物多、产率低、且腐蚀设备、造成环境污染。
The commercial trial results showed that FC-24 catalyst possessed stable high activity and good selectivity, thus the product slates were high in total C5 + liquid yield and low in gas yield.
标定结果表明，FC - 24催化剂具有较高的活性且稳定性好，产品选择性好，产气少、C5 +液收高。
The cultivated weak light-resistant breed of tomato in protected areas, Jidong 216 has the advantages of low production cost, high product yield and good quality of fruit.
培育出的保护地番茄耐弱光品种冀东216生产成本低、产品产量高，且果实品质好。
The invention has low production cost and high product yield.
本发明生产成本低，产品收率高。
The present invention has low cost, stable oxidant performance, no need of special equipment, simple operation, and high product yield.
本发明具有成本低、氧化剂性能稳定、不需特殊设备、操作简单、产品收率高等优点。
The low temperature treatment in the presence of the softener is worth extention thanks to its improvement of yield and product quality.
低温练精干品配合使用该柔软剂可以大大提高产品的品质质量和制成率，值得推广使用。
Low yield product analysis, yield enhancement.
对成品率低的产品进行分析和提高。
Chemical synthesis comes with many disadvantages like the low yield, instability of product quality and high cost.
化学合成法存在收率低、产物不稳定以及合成成本高等缺点；
The invention has simple and practical production process, environmental protection, no emission, short flows, low cost, high yield and good product quality.
本发明生产工艺简单可行、无污染、零排放、流程短、成本低、得率高、产品质量好。
The method of the invention has no use for a catalytic agent, has a low cost, is reacting stationary, is easy to control, and has a high product yield and a high purity.
本发明方法具有不需要催化剂、成本低、反应平稳且容易控制、产品收率高、纯度高的特点。
This process was characterized by simple flow sheet, low pollution, high product yield over 80%, and high product purity over 99%.
此合成工艺流程简单、污染小，产品收率大于80%，提纯后的产品纯度大于99%。
In another direction, the radical cyclization of thioimide with acylsilane produced simple cyclization product in low yield without expected enol silyl ether compound.
对于硫醯亚胺与矽基酮的自由基反应，则是得到低产率的简单环化产物，而不是预期的烯醇矽醚化合物。
The method has the advantages of low production cost, easy-recycling catalyst, high product yield, high product pureness and less pollution to the environment.
本发明方法具有生产成本低、催化剂容易回收、产品产率高、产品纯度高对环境污染小的优点。
Compared with the prior art, the invention has the advantages of simple operation steps, higher yield, high product quality, low corrosion of raw materials, less environmental pollution, etc.
与现有技术相比具有操作步骤简单，产率较高，产品质量好，原料腐蚀性小，环境污染小等优点。
Thereby overcoming the disadvantages of old methodology of low yield, small product and bad.
该方法克服了老工艺收率低，产量小，产品质量差的缺点。
The cinepazide maleate prepared in the method has a low cost, the method is simple to operate, is high in the yield, the product quality is stable and is suitable for industrialized production.
用本发明 所提供方法制备马来酸桂哌齐特，成本低，操作简便，收率较高，产品性质稳定，适合工业化生产。
The invention has the advantages of simple process, low cost, environment friendly, high yield and high purity of the product.
本发明工艺简单，成本低，环境友好，产物收率高、纯度高。
The invention has simple operation, eliminated following refining and extraction, low time consumption, high product yield and high purity (at least 99%), which is suitable for industrial production.
本发明操作简单，无需后续的精制提纯工艺，耗 时少，所得产品收率高，纯度达99％以上，适用于工业化生产。
The invention has simple operation, eliminated following refining and extraction, low time consumption, high product yield and high purity (at least 99%), which is suitable for industrial production.
本发明操作简单，无需后续的精制提纯工艺，耗 时少，所得产品收率高，纯度达99％以上，适用于工业化生产。
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