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   确定了最佳工艺条件 在 有机化工 分类中 的翻译结果: 查询用时:0.188秒
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确定了最佳工艺条件
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  optimum process conditions were determined
    Synthesis of acetylacetone by acetoacetic ester and acetic anhydride on superfine MgO was studied. studying the influence factors, the optimum process conditions were determined, including a reacting time 18 h, temperature 130 ℃, amount of catalyst MgO 0.75 %, and mole ratio n(acetoacetic ester)/n(acetic anhydride) 1.0. On these conditions, the yield of acetylacetone was 95 %.
    采用超细氧化镁作催化剂 ,乙酰乙酸乙酯和乙酸酐为原料 ,对乙酰丙酮的合成进行了研究 ,确定了最佳工艺条件 :反应时间 18h ,温度 130℃ ,原料摩尔比n(乙酰乙酸乙酯 ) /n(乙酸酐 ) =1.0 ,催化剂用量 (MgO) =0 .75 % ,乙酰丙酮的收率 95 %左右
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    This paper introduces the injection molding technology of modified PP plate like article ,discusses that how to reduce the shrinkage depression ,warp deformation ,weld line and other molding defects through the adjustment of injection molding parameters including temperature,pressure and time, as well as improvement of the conditions of mould . The optimum process conditions were determined,which leads to higher productivity.
    介绍了改性PP板状制品的注射成型技术 ,探讨了如何通过调整注射温度、压力、时间等工艺参数及改善模具条件 ,减少收缩凹陷、翘曲变形、熔接痕等成型缺陷 ,确定了最佳工艺条件 ,取得良好效果
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    In addition, the factors effecting inherent viscosity of the polymers were examined systematically and the optimum process conditions were determined.
    同时,系统研究了影响聚合物特性粘数的诸多因素,从而确定了最佳工艺条件
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  “确定了最佳工艺条件”译为未确定词的双语例句
    The removal rate of CODCr can reach 66.96% when the optimum process conditions are determined as follows: pH value=7,the amount of FeSO4 at 4g/L and H2O2 at 1.13%(V/V) and dispensing time at 45 minutes.
    实验确定了最佳工艺条件:pH=7,FeSO4投加量4 g/L,H2O2投加量为1.13%(V/V),搅拌时间15 min,此时CODCr去除率达到66.96%。
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    Inspected the influence esterification rate factor,the determination best condition was:molar ratio of hexanoic acid to isoamyl alcohol was 1∶1.2,the amount of catalyst occupied the hexanoic acid 5%,the water-carrying was 10 mL,the reaction time was 80 min,the esterification rate was 98.99%.
    考察了影响酯化率的因素,确定了最佳工艺条件:酸醇物质的量比为1∶1.2,催化剂用量占原料己酸质量的5%,带水剂环己烷10mL,反应时间80min,酯化率可达98.99%。
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    As a key step of the synthesis, the Friedel-crafts acylation was researched. And the optimal operation variables were determined through orthogonal experiment: when 0.lmol acetanilide, 0.26mol aluminum chloride, 0.12mol propionyl chloride and 200ml carbon disulfide are introduced, and the reaction time is 5 hour, the yield can be up to 57.3%.
    对合成路线中的Friedel-Crafts酰基化反应进行了研究,运用正交实验设计确定了最佳工艺条件:当乙酰苯胺用量为0.1mol时,AlCl_3用量为0.26mol、丙酰氯用量为0.12mol、溶剂用量为200ml、反应时间为5h,产率可达到57.3%;
短句来源
    While the optimal operation variables were described through orthogonal experiment: when the mole of acetanilide and potassium iodate was 2.2:1.0, 15ml acetic acid at room temperature(25℃), a yield of
    运用正交实验设计确定了最佳工艺条件:当乙酰苯胺与碘酸钾的摩尔比为2.2:1.0,溶剂用量为15ml,室温(25℃)反应24hr,产率可达47.6﹪。
短句来源
    In this paper, hydrogen sulfide was replaced with firstly ammonium sulfide toreduce crude DNT, the best process condition was obtained, when the reaction proceeded at30~40℃ for 4h, the yield of 2,6-DNT reached 75% and the purity was more than 98%(GC).
    本研究首次采用硫化铵替代硫化氢作为还原剂进行选择性部分还原,确定了最佳工艺条件:以10g1:1的DNT为基准,反应温度30~40℃,反应时间4h,获得的2,6-DNT的纯度达到98%以上(GC分析),回收率最高为75%。
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The methods for preparing plywood adhesive by condensing phenol and formaldehyde with alkaline lignin in waste water are described. The optimum conditions are determined by experimental design methods. The adhesive prepared by such conditions overtakes state standard No Ⅱ adhesive in veneer strength and moisture, and so on.

叙述了利用碱法制浆废液中的碱木素同苯酚,甲醛缩合制取结构材料粘合剂的方法。用正交设计法,确定了最佳工艺条件。在此条件下所制取的粘合剂粘合胶合板的胶合强度,含水率等项性能均超过国家Ⅱ类胶的水平。

The copolyamic acid (CPAA) were prepared from two or three aromatic anhydrides with an aromatic p, p -diamine by copolymerization in different solvents in order that the adhesion raise of the Polyimide (PI) and make for as an adhesive which used as a base material of the strain gauge.The various factors on the characterization of Process of thermal imidization in solid-state that conversion from CPAA to copolyimide (CPI)and the Properties of CPI have been ive-stigated.It was found that the adhesion of CPI is...

The copolyamic acid (CPAA) were prepared from two or three aromatic anhydrides with an aromatic p, p -diamine by copolymerization in different solvents in order that the adhesion raise of the Polyimide (PI) and make for as an adhesive which used as a base material of the strain gauge.The various factors on the characterization of Process of thermal imidization in solid-state that conversion from CPAA to copolyimide (CPI)and the Properties of CPI have been ive-stigated.It was found that the adhesion of CPI is changed with the components of raw material and have a highest peak in B 60-70 molar %, and the viscosity (ηi)and the adhesion of CPI are changed with the .temperature (Ti) of the imidization (cure)and have a-highest peak on both by oneself and the corresponding temperature Tin and Tic, the difference between Tin and Tie is about 50℃it is affirmed that Tic ( 230-250℃) is a suitable temperature of imidization (cure) which generally appear over the Tiη about 50℃Free solvents DMF

以多相溶液共聚合研制了其共聚酰亚胺(CPI)具有很高粘结力的共聚酰胺酸(CPAA)型应变基底胶。研究发现,原料组分、热亚胺固化温度(T_i)、溶剂种类和少量酚醛树脂(PF)对CPAA固相热亚胺(固)化过程和对CPI的粘度(η_i)、粘结性及T_g等均有明显影响。确定了最佳工艺条件,并以此制造了具有高精度的应变计。

The methods for preparing structural material bonding agent by condensing the alkaline lignin in the wast liquor of soda pulping process with formaldehyde and phenol are described.The optimum condition was determined by orthogonal design,and a bonding agent was prepared under the condition.The bonding strength and moisture content of the ply- wood manufactured by the bonding agent overtook the National Standar GB738-75 and the demands of GB738-75 for the adhesives of the second class.

本文叙述了利用碱法制浆废液中的碱木素同苯酚、甲醛缩合制取结构材料粘合剂的方法。用正交设计法确定了最佳工艺条件,并在此条件下制取了粘合剂。以该粘合剂制造的胶合板的胶合强度、含水率等项性能指标均超过国家Ⅱ类胶的水平。

 
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