查询词典 propylene glycol

According to reaction characteristics of producing gasoline with high olefin by Daqing raw material and converting butylene to propylene, MMC-2 and the catalyst for maximizing yield of propylene developed by Lanzhou petro-chemic academe are used to perform trial study considering reaction conditions.

针对大庆催化原料、大庆原料经一段转化生成的高烯烃含量汽油和丁烯转化生成丙烯的反应特点，结合两段工艺技术所能提供的反应条件，选择MMC-2和兰州石化研究院开发的多产丙烯催化剂分别进行实验室的中试评价。

They can also be used for such materials as following:making planes and spacecrafts,screening high-speed neutron reactors,a superconductor in electrical appliance industry,The vanadium compound can be used as a caterlyzer in sulphuric acid industry,a mixture of ethylene and propylene in symthetic rubber and a desulfurizer in oil-refinery ,an oxidizer in making nylon,pesticide,polyvinyl chloride,a non-propylene decarbonizer in chemical fertilizer industry,amilioration of A.D.A.non poisonkous desulpurtion.

我公司生产的五氧化二钒99.5级，99级，98级以及偏钒酸铵，用途广泛，它可制取金属钒和钒合金，用于钢铁冶炼\机械，飞机以及宇宙飞船制造等行业，快中子反应堆的屏蔽材料和电子工业的超导材料，钒化物应用于硫酸工业催化剂，合成橡胶的乙烯和丙烯交联，石油精炼中的脱硫，尼龙，农药，塑料聚氯乙烯制造的氧化，化肥工业的笨非尔无毒脱碳，改良A，D，A法无毒脱硫，钒化物还因其色泽艳丽而作为颜料应用到玻璃，陶瓷，医药等行业，钒酸盐也是印染业良好的媒染剂。

A series of ethylene/propylene copolymers with different propylene contents were prepared and the microstructure was characterized by ~(13)C-NMR, GPC and DSC.

2在聚合物链中，丙烯单元单个存在，即使在丙烯含量高达14.93mol％的聚合物中，也是如此。

Epoxy propane is a basic material for petro-chemical industry, and it is the third derivative of Propylene except for Polypropylene and propylene nitrile.

环氧丙烷是重要的石油化工基础原料，在丙稀的重要衍生物中是仅次于聚丙烯和丙烯腈的第三大品种。

This paper has studied the relationship between the peeling strength and the relative amount of oxygen - containing groups produced on the surfaces of propylene homopolymer, ethylene - propylene block copolymer and random copolymer when ozonization was used to improve the coating properties of PP surface.

研究了用臭氧氧化法对聚丙烯表面进行涂装性改良时，丙烯均聚物、乙烯—丙烯嵌段共聚物及无规共聚物表面上含氧官能团相对生成量和涂膜剥离强度之间的关系。

The results showed that hydrogen peroxide, silanols species and TiO〓 didn't have solvolysis activity of propylene oxide. While framework Al, coordinatively unsaturated Ti〓 ions as Lewis acid sites in the framework, Ti-OH and the five member ring active titanium species formed by TS-1, hydrogen peroxide and solvent can catalyze the solvolysis of propylene oxide.

研究结果表明：原料双氧水和TS-1沸石上的SiOH和TiO〓对环氧丙烷溶剂解反应无催化活性；而下列物种对环氧丙烷溶剂解反应具有催化活性：TS-1中的骨架铝，沸石骨架中配位不饱和的Ti〓形成的L酸中心，TS-1水解产生的钛羟基和由TS-1，双氧水和溶剂相互作用所生成的五元环中间活性钛物种。

Benzaldehyde 1, 2-propylene acetalization was carried out with benzaldehyde and 1, 2-propylene alcohol in the presence of polyaniline doped with ferric chloride.

在以苯甲醛和1，2-丙二醇为原料合成苯甲醛1，2-丙二醇缩醛的反应中，探讨了PAn-FeCl3催化剂对缩醛反应的催化活性。

Benzaldehyde 1,2-propylene acetalization was synthesized from benzaldehyde and 1,2-propylene alcohol in the presence of polyaniline doped with copper chloride.

缩醛是一类重要化合物，具有原料来源丰富、生产工艺简单、化学性质稳定等优点，近20年来作为新型香料在日用香精和食品香精中均有广泛应用[1-2]。

Dehydration process based on hollow fiber composite membrane is one of the crucial and effective methods to remove water vapor from industrial gases such as light hydrocarbon, compressed air, natural gas and so on. Dehydration of propylene with VP method was studied in the thesis. We prepared the PVA/PS、CS/PS and PVA-CS/PS hollow fiber composite membranes by spread method. The permeation behavior of water vapor among coagulable light hydrocarbons through composite membranes and asymmetric membrane was researched by vapor permeation method. Also a differential mathematical model was established which can describe dehydration of gas phase propylene.

本论文以采用蒸气渗透法脱除丙烯中微量水分为目标，制备了 PVA/PS、 CS/PS、PVA-CS/PS 中空纤维复合膜；研究了可凝性轻烃蒸气中的微量水分在复合膜、非对称膜中的渗透行为，建立了描述丙烯气相脱水的数学模型，并进行了模拟计算；深入探讨了水蒸气在交联 PVA 致密膜中的渗透机理。

PP1740 copolymer is a multi phase copolymer,composed of homo-polypropylene,ethylene-propylene rubber,and crystallizable propylene-ethylene copolymer.Homo-polypropylene part offers rigidity and EPR part offers impact strength.The relative ...

研究结果表明，PP1740共聚物由均聚聚丙烯、乙丙橡胶和可结晶的乙丙共聚物组成，具有优良的机械性能；均聚聚丙烯为PP1740共聚物提供刚性，乙丙橡胶可提高PP1740共聚物的抗冲性能；PP1740共聚物的相对分子质量分布呈多分散性，相对分子质量分布较宽；乙丙橡胶的相对分子质量较大，以直径1～2μm球型微粒均匀分布在聚丙烯基体中，有利于提高PP1740共聚物的冲击强度；PP1740共聚物的熔点较高，耐热性好。

The network space is the typical form of abstract space when it comes to the digital stage.

网络空间是抽象空间数字化阶段的典型形式。

The Notarial System,as the system of judicial certification in our country,is both the constructor and the defender of social credit system,It has its special value and function in the social honesty.

公证制度作为我国司法证明制度，既是社会信用体系的建设者，同时也是社会信用的捍卫者，在诚信中有其特殊的价值和功能。