Essential oils& Determination of ester value of oils containing difficult-to-saponify esters

Test methods for acid value, saponification value, ester value, iodine value, hydroxyl value and unsaponifiable matter of chemical products

化学产品酸值、皂化值、酯化值、碘值、羟值及未皂化物质化学分析方法

Vicinal diol can be effectively translated into azelaic acid and the corresponding dicarboxylic acid monomethyl ester.

邻二醇可以有效地转化为壬酸和相应的二元酸单甲酯。

Carbonic acid, dibutyl ester; dibutyl carbonate;

二丁基碳酸酯；

Compounding of Specific Lateral High Carbonic Polypropylene Alcoholic Ester and Pour Point Depressant Performance Evaluation

特殊支链聚丙烯酸高碳醇酯的合成及降凝性能评价

This text has introduced briefly the physical performance of the Polycarbonate and production status at present. Comparatively detailed elucidation gathers the application distribution situation in nine major fields such as optics, automobile industry, aviation, spaceflight of carbonic acid ester.

介绍了聚碳酸酯的物理性能和生产现状，详细地阐明了聚碳酸酯在光学、汽车制造工业、航空航天等九大领域的应用分布情况。

Some metal oxides, organic and inorganic salts were studied as catalyst for synthesis of aliphatic carbonic ester by alcoholysis of urea.

考察了以不同金属氧化物为催化剂对尿素醇解合成长碳链脂肪族碳酸二酯的催化活性，发现氧化锌具有较高的催化活性。

The high-effective catalysis and synthesis of cyclic carbonic ester by Zn ion solution system

锌离子液体系高效催化合成环状碳酸酯

The paraffin wax is oxidized without catalysts by the self made experimental apparatus, and the acid number ( AN) and the ester number ( EN) of oxidized wax are correlated with the reaction conditions using artificial neural network ( ANN).

在自制的石蜡氧化装置上对石蜡进行了无催化剂氧化，并利用人工神经网络将氧化蜡的酸值和酯值与石蜡氧化条件（反应温度、空气流量和反应时间）进行关联。

So it is an important raw material for the production of paper, coatings, inks, rubber, soaps, electronic industrial products, food grade ester gum, rosin ester resins etc.

是造纸、涂料、油墨、橡胶、肥皂、电子、食用酯胶、松香酯树脂等工业的重要原料。

Using Tobacco-seed Oil Instead of Tung Oil to Make Phenol Aldehyde and ester Gum Paint

用烟籽油代替桐油制酚醛、酯胶树脂漆

As the bending strength of sodium silicate sand cured by ester method is much higher than that cured by CO_2 method the analysis shows that the key point is the refinement of grains of silicate gel.

分析了酯法比CO2法水玻璃砂强度高的原因，指出充分发挥水玻璃粘结效率的关键在于细化水玻璃凝胶胶位。

The Technology of Sodium Silicate Sand Hardened by Ester and the Reclamation of the Used Sand

酯硬化水玻璃砂工艺及其旧砂再生

Improvement of the natural temperature strength and collapsibility of sodium silicate sand hardened by ester

提高酯硬化水玻璃砂常温强度及溃散性研究

Process of Sodium Silicate Sand by Organic Ester Hardening Without Waste Sand and Machine for Used Sand

无废砂排放的有机酯水玻璃砂工艺及旧砂再生设备

The Main Factor of Affecting the Properties of Dry Reclaimed Sand Bonded with Sodium Silicate Hardened by Ester

影响酯硬化水玻璃干法再生砂性能的主要因素

The Characteristic of Reclaimed Sands Bonded with Sodium Silicate Hardened by Ester

酯硬化水玻璃再生砂的性能特征

Plasticizer DOTP was prepared from ethylene glycol residue ( major component is PET low polymer) using single step process in which alcoholysis and ester interchange were combined.

以聚酯生产中产生的下脚料&乙二醇残渣（主要含PET低聚物）为原料，采用辛醇合并醇解、酯交换一步法工艺，合成了增塑剂DOTP。

When discussed the transesterification reaction, the formula used to calculate ester interchange rate based on the oil's relative molecular weight and the increase of hydroxy group was derived;

在讨论油脂的酯交换改性反应时，推导出了可根据油脂的平均相对分子质量和酯交换后羟值的增加量计算酯交换率的近似公式；

The ester interchange reaction and the crystallization of component ports to affect each other are causes of change of the relation between melting point and compositions.

酯交换反应和组分间彼此对结晶作用的影响，是熔点与组成关系变化的原因。

This flavour is synthesized by the ester interchange using diethyl oxalate and relative alcohol as materials.

这些香料都是以草酸二乙酯与相应的醇为原料，通过酯交换反应来合成的。