a liquid fatty acid found in milk and sweat and in fuel distillates

starting from toluene diisocyanate (tdi), polypropylene glycol (ppg) and dimethylol propionic acid (dmpa), the anionic water-borne polyurethane emulsion was synthesized.

以甲苯二异氰酸酯（tdi）、聚丙二醇（ppg）、二羟甲基丙酸（dmpa）为原料，制备了阴离子型水性聚氨酯乳液。

the esterification reaction of propionic acid with n-pentanol was studied by using novel aluminophosphate and silicoaluminophosphate molecular sieves as catalysts.

用新型磷酸铝分子筛和硅磷酸铝分子筛作催化剂，对丙酸和正戊醇液—固相酯化反应进行了研究。

under the selected conditions of the chromatographic operation, there was the better separation efficiency between 2-(4- hydroxyphenoxy) propionic acid and impurities(such as hydroquinone, etc).

在选定的色谱操作条件下，2-（4-羟基苯氧基）丙酸与杂质对苯二酚等之间具有良好的分高效果。

propionic acid and its salts are important feed preservatives.

丙酸及其盐是重要的饲料防腐剂。

using niobic acid as catalyst, cyclohexane as dehydrant, benzyl propionate was synthesized based on propionic acid and benzyl alcohol.

摘要以铌作催化剂，环己烷为带水剂，用丙酸和苯甲醇直接合成了丙酸芐酯。

an aqueous polyurethane emulsion adhesive was prepared from epoxy resin, toluene diisocyanate (tdi) and dimethylol propionic acid (dmpa). the product structure was characterized by infrared spectrum.

以环氧树脂、甲苯二异氰酸酯（tdi）、二羟甲基丙酸（dmpa）等为原料合成了水性聚氨酯乳液胶粘剂，用红外光谱对产物结构进行了表征。

production techniques and market of propionic aldehyde and propionic acid and propanol are introduced in this paper.

本文综述了丙醛、丙酸、丙醇的工艺技术及市场前景。

among these products the production of propanal, propanol and propionic acid remains almost a blank in china.

介绍了世界丙醛系列产品的生产与应用。

a stable polyether anionic waterborne polyurethane adhesive was prepared with polyether diol, diisocyanate and dimethylol propionic acid as raw materials.

以聚醚二醇、二异氰酸酯和二羟甲基丙酸为基本原料制备了一种稳定的聚醚型阴离子水性聚氨酯胶黏剂。

benzyl propionate was synthesized by the esterification reaction of benzyl alcohol with propionic acid using potassium bisulfate.

用硫酸氢钾催化苯甲醇与丙酸的酯化反应合成了丙酸芐酯。

an coupling bioprocess for in situ propionic acid recovery coupled with fermentation of vitamin b12 was established based on this technology.

将此工艺用于发酵过程中丙酸的原位吸附分离，建立了维生素b12发酵与丙酸在线分离的耦合过程。

with the trash of carapace aquatic product as the calcium source, calcium propionate is produced by the synthesis of propionic acid and acid.

利用甲壳类水产的废弃物为钙源，与丙酸合成丙酸钙。

the high yield of propionic acid in mixed acid fermentation was the main reason for the low hydrogen production capacity.

混合酸发酵的发酵产物中丙酸含量较高是产氢能力偏低的主要原因。

propionic acid is product heavily short of in our country.

丙酸是目前国内十分紧缺的一种产品。

the synthetic conditions of zinc propionate with propionic acid and basic zinc carbonate as raw materials were studied.

以丙酸和堿式碳酸锌为原料，制备了食品及饲料添加剂丙酸锌。

by using sodium hydrogen sulfate as the catalyst, benzyl alcohol and propionic acid reacted to form benzyl propionate.

以硫酸氢钠为催化剂，环己烷为脱水剂，己酸和芐醇为原料，合成了食用香料己酸芐酯。

propionic acid as a slow transformation, there will be a gradual accumulation in the latter part of the process.

丙酸由于转化速度较慢，在后期会有一个逐渐积累的过程。