中沸点

研究了在CO2作为低沸点工质时，高沸点工质和中沸点工质对系统压比和性能系数COP的影响，以及这些性能参数随系统中CO2摩尔含量的变化情况。

The influences of high boiling point refrigerants and middle boiling point refrigerants on the COP and pressure ratio of the system are investigated , and the corresponding changes of COP and pressure ratio of these mixtures with the change of carbon dioxide mole fraction are got .

目的：考察中药提取液浓缩过程中沸点变化与溶剂组成和溶质浓度的关系。

AIM : To observe the change of boiling point in the concentration of medical herb 's extract liquor .

CSGC方程估算污水处理中高沸点有机物蒸气压

Estimation of Vapor Pressure for High Boiling Organic Compounds in Wastewater Treatment with Corresponding States Group Contribution

由于在FFAP毛细管预柱上芳烃在比高它三个碳数的烷烃之后出峰，可以通过阀切换操作把芳烃反吹入非极性OV-1分析柱中按照沸点进行详细分离。

The aromatics having carbon number of n are retained after n-Cn + 3 on the FFAP pre-column , and were cut and back flushed after the elution of n-Cn + 3 , onto an a apolar analytical column and were separated according to their boiling points .

环己醇是一种用途广泛的中高沸点有机化学品，主要用于制备己二酸和己内酰胺。

Cyclohexanol is an organic chemical with main use for adipic acid and caprolactam production .

毛细管直接进样测定豉香型白酒中高沸点香味物质

Direct Sample Injection in Capillary to Determine High Boiling Point Flavoring Components in Fermented Soybean-flavor Liquor

作者继开发石油馏分导热系数关联式后，利用国内外中平均沸点和相对密度分布范围很宽的各种石油馏分的大量实验数据，对关联式进行了考察。

A correlation equation developed by the author for calculating the thermal conductivity of petroleum fractions was investigated using the measured data of various petroleum fractions .

该方法用显式关联直接将恩氏蒸馏数据转换成实沸点蒸馏数据和计算出馏分的中平均沸点，然后用积分法切割假组分。

The ASTM data was treated to produce the TBP data and the mean average boiling point by explicit correlations and then the pseudo-components were cut by using the integral method .

对于含中高沸点有机物的脱附尾气可以应用冷凝的方法进行回收，而低沸点的采用燃烧的方法更为经济有效。

The desorption gas containing middle or high boiling point VOCs can be recovered easily by condensation . It is more economical to burn the desorption gas containing low boiling point VOCs .

本方法对于猕猴桃酒中高沸点挥发性风味物质研究具有重要的应用价值。（4）同时蒸馏法为常用挥发性物质提取方法，本研究表明，该方法重现性好，灵敏度较差。

It is worthy of applying to study the volatile flavor substances at high boiling point in kiwi fruit wine . ( 4 ) SDE is commonly used in extracting the volatile components , which has good repeatability but poor sensitivity .

针对石油馏分质量平均、实分子平均、立方平均和中平均沸点的校正问题进行了研究，提出了新的计算数学关联式，并进行了参数估计和误差分析。

New and reliable empirical correlations for predicting the average boiling points of petroleum fractions , which include mass average boiling point , molar average boiling point , cubic average boiling point and mid-average boiling point , were proposed and the deviation was analyzed .

溶液&浇铸法制备再铸Nafion膜工艺中，高沸点溶剂置换低沸点溶剂和适当成膜温度是两个最关键因素；

At the process of preparation of recast-Nafion by solution-cast method , replacing low-boiling-point solvent by high-boiling-point one and preparing membrane under appropriate temperature are two decisive factors for high-quality recast - Nafion membrane .

热解吸-气相色谱-质谱法测定烟草中的低沸点组分马可森开杯闪点测定器

Determination of the low boiling point components in tobacco by thermal desorption-gas chromatography-mass spectrometry

气相色谱法快速测定白酒与发酵液中的低沸点有机酸

Gas Chromatographic ( GC ) Analysis of Low - Boiling Organic Acids in Wine and Fermented Liquid

在蒸馏过程中，低沸点成分不发生化学变化，含量基本保持不变；

During distillation , the contents of low boiling components remained the original levels and no chemical reactions occured ;

相对来说，丙酮提取物中的低沸点组分偏多，正己烷提取物中的高沸点组分偏多。

Relatively , the acetone extract includes more components of lower boiling point , while it is opposite for n-hexane extract .

四特新酒在贮存过程中，低沸点醇、醛、酸不断挥发及发生各种理化反应，可减少有害物质的含量和杂味；

The constant volatilization and physical reactions of low boiling point substances such as alcohol , aldehyde and acids during the storage of Si'te newly-produced liquor could reduce the content of harmful substances and eliminate off-flavor .

如果给两种挥发性物质的混合物加热，在分离的物质中，低沸点的物质的浓度比溶解的高沸点物质的浓度要高的多。

If a liquid mixture of two volatile materials is heated , generally the vapor that comes off will have a higher concentration of the lower boiling materials than the liquid from which it was evolved .

根据铊与含铊渣中金属的沸点和蒸气压的不同，从理论上分析得出，铊与其它金属是可分离的，并分三步法提纯铊。

Based on the different boiling point and vapor pressure in thallium and metals contained thallium , the author gets the conclusion that thallium can be separated from other metals . The extraction process can be divided into three steps .

陶瓷材料中熔点和沸点较高的碳化钛和碳化钨以固熔体的形式析出，致使材料表面碳含量不均匀，并影响其电阻。

The melting points and boiling points of the engineering ceramic components are different , TiC and WC are separated out in melt solid mode , result in the uneven of the carbon content of the machined surfaces and their resistivity are effected .

另一方面可以降低混合油中溶剂的沸点，以达到降低蒸发温度的目的。可以节约能源、节省钢材、提高毛油质量。

The vacuum evaporation technology has some advantage , such as reducing the contact of oil with oxygen in air , reducing the solvent boiling point of miscella and the evaporation temperature , saving energy , saving steel materials , improving the quality of crude oil and so on .

但存在许多缺点，如除去溶剂的过程可能会造成许多挥发性成分的损失，萃取物中通常含有高沸点以及非挥发性的成分，对GC仪器造成损害等。

But there are many disadvantages , such as the loss of more volatile compounds in the process of solvent removal , the contamination of GC due to high-boiling and non-volatile materials in extracts .

在制备Nafion/SiO2固体超强酸催化剂的过程中，加入高沸点溶剂二甲基亚砜（DMSO），并增加140℃高温后处理过程，该工艺提高了催化剂的物理化学性能。

The traditional sol-gel technique for preparing Nafion / SiO_2 solid acid catalyst was improved by adding high boiling point dimethyl sulfoxide ( DMSO ) and aftertreatment at 140 ℃ .

研究了一种用液相色谱法测定双酚A物料中苯酚和高沸点物含量的方法。

A liquid chromatography method determination of phenol and high-boiling components in bisphenol A process is investigated .

可生物降解聚氨酯的合成、表征及其降解性研究降低压强可降低液体中所有化合物的沸点，这样可使它们沸腾而不分解。

Lowering the pressure has the effect lowering the boiling point of all the compounds in the liquid so that they can be boiled without decomposition .

《物理化学》中的稀溶液沸点升高与《有机化学实验》中的水蒸汽蒸馏看似矛盾，实质上是它们的原理不同。

The boiling point rise of dilute solution in physical chemistry seems to contradict with vapor distillation in experiment of organic chemistry . Actually , they are of different principles .

在各种常用的有机溶剂中，首先选定沸点在35℃&75℃之间的溶液，主要有乙醚、丙酮和乙醇。

In the commonly used organic solvent , first we designated that the boiling point in 35 ℃ - 75 ℃ between solution , mainly has the ether , the acetone and the ethyl alcohol .

本文在不隔离电解槽中对煤焦油中沸点为180～320℃的组分进行了电解处理，阳极用碳，阴极用铅。

180-320 C fraction of coal tar is processed electrochemically in an undevided cell with carbon as anode and lead as cathode .