季戊四醇

First, a lot of experiments about changing character on CaCO3 surface has been rearsched,example,fatty acid,pentaerythritol,rosin ester,cocoanut oil,rosin, pentaerythritol + rosin ester,glycerine + rosin ester ,cocoanut oil + oleic acid,titanate + fatty acid,cocoanut oil + fatty acid, and so on surface active agents. Among these surface active agents, cocoanut oil + oleic acid,and titanate+ fatty acid,and cocoanut oil + fatty acid are the best.

本文首先对纳米碳酸钙的活化改性进行了实验研究，在硬脂酸钠、季戊四醇、松香酯、椰子油、松香、季戊四醇+松香酯、甘油+松香酯、椰子油+油酸、钛酸酯+硬脂酸钠、椰子油+硬脂酸钠等表面改性剂中，以硬脂酸钠、椰子油、油酸+椰子油、椰子油+硬脂酸钠等活化剂的活化效果较为理想。

The factors such as pH value,pressure and time in pressurized hydrolysis of pentaerythrite solution and pentaerythrite mother liquor are studied.

本文研究了回收季戊四醇溶液或季戊四醇母液加压水解时pH值、压力和时间等因素对缩醛水解的影响。

Pentaerythrityl tetraacetate was synthesized from acetic acid and pentaerythrite, catalyzed by SO(superscript 2- subscript 4)/TiO2-La2O3 rare-earth solid superacid. Various factors affecting the reaction were discussed.

以稀土固体超强酸SO(上标 2-下标 4)/TiO2-La2O3为催化剂，乙酸和季戊四醇为原料合成季戊四醇四乙酸酯，并考察了影响反应的因素。

The development of synthesis technology, industrial production, market demand and consumption structure of pentaerythritol were reviewed. Some suggestions to domestic production of pentaerythritol were given.

全面阐述了季戊四醇的合成技术和发展现状，对国内外季戊四醇的生产、需求以及消费结构进行了分析，提出了我国今后季戊四醇生产的一些建议。

Condensation of cyclohexanone and pentaerythritol catalyzed by iodine supported on activated carbon was investigated.

为了研究活性炭负载单质碘催化合成季戊四醇双缩酮催化活性，以季戊四醇和环己酮为原料，合成环己酮季戊四醇双缩酮。

Abtract : The pentaerythritol was one count for much raw material for industry, this article mainly introduced the pentaerythritol in the industry use, the synthesis craft progressed, the domestic and foreign productions condition and the expense situation.

季戊四醇是一种非常重要的工业原料，本文主要介绍了季戊四醇的在工业中的用途、合成工艺进展、国内外生产状况和消费情况。

The list, the double pentaerythritol separation technology has satisfied the high quality product request; The domestic and foreign pentaerythritol productive consumption condition favors, the prospect is bright.

单、双季戊四醇的分离技术满足了高品质产品的要求；国内外季戊四醇的生产消费状况看好，前景光明。

The results of infrared spectral analysis and other relevant data indicate that the MPPA is a mixture of ammonium and melamine salts of polyphosphoric acid and melamine.

燃烧试验表明，MPPA与季戊四醇复配后对聚丙烯的阻燃作用显著增强，这是因为季戊四醇的加入有助于阻燃聚丙烯在受热燃烧时形成膨胀炭的结果。

Two kinds of new intermolecular complex antioxidants 3-(3, 5-di-butyl-4-hydroxyphenyl) propionyl pentaerythritol phosphate and octstearic pentaerythritol tetra- phosphite were synthesized by one-pot and two steps transesterification.

分别采用一锅法和两步酯交换法合成了两种新型分子内复合型抗氧剂，即3-(3，5-二叔丁基-4-羟基苯基)丙酰亚磷酸季戊四醇酯和八硬脂基季戊四醇四亚磷酸酯。

Distearyl pentaerythritol diphosphite has been synthesized with pentaerythritol, triethyl phosphite and stearic alcohol.

以季戊四醇、亚磷酸三乙酯和十八醇为原料，在实验室合成了二硬脂基季戊四醇二亚磷酸酯。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。