A liquid produced by condensation from a vapor during distilling; the product of distilling. 蒸馏过程中蒸汽浓缩产生的液体,蒸馏的产物。
Theoretical study of structure and stability of two isomers in condensation product in synthesizing trimethoprim 合成甲氧苄胺嘧啶缩合反应产物中两种同分异构体的结构和稳定性的理论研究
Some interaction between copper and zinc oxide would lead to the increasing of condensation product. 铜-锌之间的某种相互作用导致了缩合产物增加。
This paper anticipated application prospects for making use of recycling technology for hermetically sealed high temperature condensation water in forest product industry fields and summarized successful experience of the technology applied in MDF Production of the National Engineering Center of Wood Industry. 阐述密闭式高温冷凝水回收技术在林产工业企业的应用前景,总结分析国家木材工业工程中心中试基地应用此技术在MDF生产中获得成功的经验。
The improvement of the condensation technology on the butachlor production is carried out. It has been realized that the sodium hydroxide solution of 47 percent is replaced with the solution 42 percent, thus raising the conversion rate and the yield of product and reducing the production cost. 对丁草胺生产中的缩合岗位进行了工艺改进.实现了用市售的42%波碱替代47%的液碱直接用于生产,提高了原料的转化率和产品收率,降低了生产成本。
Ethyl coumarin-3-carboxylate was synthesized from salicylaldehyde and diethyl malonate in absolute alcohol by Knoevenagel condensation reaction using hexahydropyridine as the catalyst. Hydrolysis of the reaction product with sodium hydroxide gave coumarin-3-carboxylic acid. 在无水乙醇中,以六氢吡啶为催化剂,通过水杨醛与丙二酸二乙酯的Knoevenagel缩合反应合成了香豆素-3-羧酸乙酯,再经水解、酸化得到香豆素-3-羧酸。
The application of polymeric flocculant, the condensation product on dicyandiamide and formaldehyde, in the coagulation process for SBR production was studied. 本工作研究了高分子絮凝剂(二腈二胺甲醛缩合物)在丁苯胶凝聚工艺中的应用。
A new type of phenolic resin adhesive for casting was prepared by condensation polymerization of furfuryl alcohol and the reaction product between phenol, phenylphenol, urea and formaldehyde. 苯酚、苯基苯酚、尿素与甲醛的反应产物进一步与糖醇缩聚生成新型铸造用改性酚醛树脂粘结剂。
The cracked gas is analyzed by gas chromatography, the liquid reaction products are separated into narrow fractions of every 30 ℃ distillation range by true boiling point distillation and the condensation product of residue oil is analyzed by Soxhlet extraction. 气相色谱分析裂化气的组成,液相反应产物通过色谱模拟实沸点蒸馏分析,以30℃的馏程间隔划分成窄馏分,利用索式抽提对残渣油的缩合产物进行分析。
Chalcones can be prepared through condensation of 4-hydroxyl acetophenone or 2,4-dihydroxyl acetophenone with substitued benzaldehydes in ethyl glycol solution, using the catalyst of boric acid at 110~ 120 ℃ in 6 h. The product was purified by the flash chromatography on silica gel. 4羟基苯乙酮或2,4二羟基苯乙酮与取代苯甲醛在乙二醇溶液中,以硼酸为催化剂,于110~120℃反应6h,再经柱分离精制得羟基查尔酮衍生物。
Products which occur in the condensation of cellulose with trans aconitic acid, were tested and analysed for the extent to which the effect of UV radiation and bleaching agents affected the degree of whiteness and product distribution. 对纤维素和反式丙烯三甲酸缩聚产物进行测试和分析来判断紫外线辐射和漂白剂对白度和产物分布的影响程度。
The results show that high-molecular weight PLA can be prepared by the direct melt condensation polymerization at suitable technological condition and the product has good biodegradability. 结果表明:采用适当的工艺能通过熔融缩聚法制备出高分子质量的聚乳酸,且具有良好的生物降解性能。
In addition, some related processes, such as alcoholysis of terylene, esterifying of binary acids and condensation polymerizing for the product were presented. 另外,就涤纶的醇解、二元酸的酯化以及产品的缩聚等过程中相关操作工艺也作了详细的描述。
A coking factor is proposed to evaluate the coking tendency of different residual oils under same reaction condition. The experimental condition for determining the coking factor was based on the effect of reaction temperature and reaction time on the condensation product. 提出了用不同油样在相同反应条件下得到的结焦因子作为评价油样结焦倾向的方法,在考察反应温度和反应时间对缩合产物影响的基础上确定了测定结焦因子的实验条件。
Firstly analysis the effect of temperature, molar ratio of water and silicon, catalyst concentration and time on the loading rate of hydrolysis and condensation product of APTES on the surface of ultramarine pigment. 首先分析温度、水硅摩尔比、催化剂用量、时间对APTES水解缩合产物在群青颜料表面负载率的影响。
In high temperature water recycling system, due to the condenser disclosure, metal corrosion and other reasons, condensation water has certain pollution, main product is iron oxide and free of solid iron ion. 在高温凝结水回收系统中,由于凝汽器泄露、金属腐蚀等原因,凝结水中存在着一定的污染,产物主要是铁的氧化物及游离的二价铁离子。
The results showed that the catalyst system had satisfactory results in cross-aldol condensation of cyclopentanone and n-valeraldehyde, the yield of main product 2-pentylidene cyclopentanone can be reached to more than 90%. 实验结果表明,将该催化体系作用于环戊酮和正戊醛的交叉缩合反应中,主产物2-亚戊基环戊酮的收率大于90%,取得了较为满意的效果。
The completed work included synthesis and modification of related building blocks ( TAC, triethylene glycol, PEG114), preliminary study of condensation polymerization conditions and characterization of obtained product. This part of work is in progress. 现已完成的工作包括原料(TAC,三甘醇,PEG114)的合成和修饰,缩合聚合条件的初步探索以及聚合物的初步表征,其他工作正在进行中。
Mannich condensation product, also known as phenolic amines, can cure epoxy resin at room temperature and humid environment. It occupies an important position among the brands of the room or low temperature curing agent. Mannich缩合的产物又称酚醛胺,它具有能在低温、潮湿环境下固化环氧树脂的优点,在室温、低温环氧树脂固化剂品牌中占有重要的位置,同时酚醛胺也广泛应用于重防腐行业。