结晶点

本研究优化了WCT的粗提取过程，对其部分理化性质（溶解性，晶体形状，结晶点）进行了测定。

It is extraction and recrystallization extracted from Malvaceae plants , the extraction process of WCT is optimized and the physical and chemical properties of substances were tested ( solubility , crystal structure , crystallization point ) .

用气相色谱法同时测定石油苯的结晶点、密度、沸程及纯度

Simultaneous Determination of Crystallization Point . Density . Boiling Range and Purity of Petroleum Benzene by Gas Chromatography

GB/T618-1988化学试剂结晶点测定通用方法

Chemical reagent & General method for the determination of crystallizing point

GB/T11409.2-1995橡胶防老剂、硫化促进剂结晶点测定方法

Test method of crystallizing point for rubber antiagers and vulcanizing accelerators

GB/T2385-1992染料中间体结晶点测定通用方法

Dye intermediates & General method for the determination of crystallizing point

GB/T3710-1983工业酚、苯酚结晶点测定方法

Method of determination for crystallizing point of technical phenol and phenic acid

GB/T6706-1986焦化苯酚水分测定结晶点下降法

Determination of water content of coking phenol by cryoscopic method

GB/T3069.2-1986萘结晶点的测定方法

Method for the determination of the crystallization temperature of naphthalene

GB/T7533-1993有机化工产品结晶点的测定方法

Test method for crystallizing point of organic chemical products

GB/T13255.2-1991工业己内酰胺结晶点的测定

Caprolactam for industrial use-Determination of crystallizing point

熔点、结晶点和凝固点三种测定方法的评述

A Review of Three Kinds Determination Method for Melting Point , Crystallizing Point and Solidification Point

GB/T3145-1982苯结晶点测定法

Benzene & Determination of crystallizing point

对二氯苯企业标准中结晶点的测定方法探讨

Discussion on the determination method for the crystallizing point of p-dichlorobenzene according to the manufacture 's standard

同时，结晶点测定结果的误差提高到0.05℃，超过国际先进水平。

More especially , the error achieved in the determination results is 0.05 , which surpasses the advanced world levels .

经过多级提纯，得到含量大于99.5%，结晶点大于2.55℃的2,6二氯甲苯。

Through multistage recrystallization , the crystallizing point of 2,6 dichlorotoluene was up to 2.55 ℃, and the purity > 99.5 % ?

在110℃下，向浓度为1.0wt%的聚乙烯／二甲苯体系中连续加入乙二醇乙醚，临界结晶点位于乙二醇乙醚的含量达31.6wt%处。

By adding EGME to PEs ' xylene solution with content of 1.0wt % at 110C , a critical point of crystallization of PE can be found at 31.6wt % ( EGME ) .

此工艺流程简单，操作条件缓和，能以99.2%以上的回收率生产结晶点高于5.40℃的纯苯及芳烃含量合格的6号溶剂油；

The new process had the advantages of simple scheme , moderate operating condition , higher than 99.0 % benzene recovery with a benzene purity of crystallizing point > 5.40 ℃, and a qualified 6 # solvent was also obtained .

探讨了对二氯苯结晶点的测定方法，确定了冷浴温度的控制，样品脱水处理的方法，搅拌器及搅拌时间的选择等。

A method for the determination of the crystallizing point of p-dichlorobenzene is discussed , wherein the control of the cooling bath temperature , the method for the dehydration of samples , the selection of stirrer and stirring time , etc. are introduced .

熔核的一次结晶是点缝焊接头形成过程中的重要环节之一。

The primary crystal of molten metal is one of the important links in the process of spot and seamwelding joint .

二者在结晶度变化转折点的失重量分别为30%和35%左右，此时结晶度分别为59%和56%。

The weight loss of maize and potato were about 30 % and 35 % , at the transition of relative crystallinity , respectively , and they corresponded to crystallinity 59 % and 56 % , respectively .

实验结果表明：以水作为外相，采用HLB值大于18的复合型乳化剂，经一次结晶所得精萘的结晶点大于79.6℃，精萘质量符合国家一级精萘标准，精萘产率在90%左右。

The results show that when the mixed emulsifiers ( HLB > 18 ) is used and water as ex-ternal phase , the solidification point of pure naphthalene are higher than 79.6 ℃ and the yield of pure naphthalene are about 93 % .

实验结果表明，乙醇作溶剂一次结晶的萘产品结晶点为79.5℃，对苯并噻吩的脱除率为50%左右；

The results show that the solidification point of one step crystallization product is about 79.5 ℃ and half of the benzothiophene in crude naphthalene is removed .