查询词典 ethylene

The method solves the problems better through adopting the following technical proposal that: the method takes the solid super acid consisting of the VIB group elements or the VIB group elements and the IVB group elements in the periodic table of elements and loaded on a symbiosis molecular sieve as catalyst, and naphtha with the component being C4-C10 as a raw material so as to carry out catalytic cracking reaction at a temperature of between 550 and 700 DEG C, under a pressure of between 0.01 and 0.5 MPa, at a reaction weight space velocity of between 0.1 and 4 hours and with the weight ratio between water and naphtha of between 0.5:1 and 4:1, thereby generating ethylene and propylene.

本发明涉及一种催化裂解制乙烯丙烯的方法，主要解决现有催化裂解制乙烯丙烯催化剂的使用温度高，活性低，乙烯丙烯选择性差的问题，本发明通过使用在共生分子筛上负载由元素周期表VIB族元素或VIB族元素和IVB族元素组成的固体超强酸作为催化剂，以组份为C 4 ～C 10 的石脑油为原料，在反应温度为550～700℃，反应压力为0.01～0.5MPa，反应重量空速为0.1～4小时-1 ，水/石脑油重量比为0.5～4∶1的条件下，进行催化裂解反应生成乙烯丙烯的技术方案，较好地解决了该问题，可用于催化裂解制乙烯丙烯的工业生产中。

Is a professional production of various kinds of single-use medical device packaging supplies company in accordance with the requirements of customers in the production of suitable ethylene oxide, cobalt-60 radiation and steam sterilization different , the way the various specifications for sterilization medical packaging bag.

南通市索派医用包装材料有限公司是一家专业生产各类一次性使用医疗器械包装用品的企业，公司能根据客户的要求分别在生产出适合于环氧乙烷，钴60射线和蒸汽等不同的消毒，灭菌方式的各种规格的医用包装袋。

Inside wall steel pipe after tidy up again use to gather the ethylene as lining material to melt to revolve to model a craft to process with the heat but become, make lining material and metals steel intertexture hot to merge into an integral whole, firmly gather knot in wall inside the piping after cool off, so then can batch quantity produce plastics compound steel pipe.

内壁清理后的钢管再用聚乙烯为衬里材料用热融旋转成型工艺加工而成，使衬里材料与金属钢交织热融为一体，冷却后牢固地聚结在管道内壁，这样便可批量生产衬塑复合钢管。

All kinds of molecule structures of the ethylene - vinyl acetate copolymers have been synthesized by solution polymerization.

用溶液聚合法合成了各种结构的乙烯-醋酸乙烯酯共聚物降凝剂，考察了它们的结晶性质、溶解性质和降凝效果。

Factory of its main ingredient is one of ethylene vinyl acetate copolymer as the main material, add tackifier and other ingredients together with solid-type adhesive.

本厂其主要成分是以乙烯一醋酸乙烯共聚物为主要材料，加入增粘剂与其它成份配合而成的固体型粘合剂。

Ethylene - vinyl acetate copolymer was a type of paraffin inhibitor used in oilfield, but its structure and molecular weight were not controlled exactly.

乙烯-醋酸乙烯酯共聚物是油田上用得较多的一种防蜡剂，但其结构和相对分子质量不能准确控制。

Ethylene vinyl acetate: a chemical compound with rubbery properties that is very light in weight.

EVA(***不是福音战士阿)：一种轻质的具有橡胶属性的化学混合物。

The company is also constructing specialty acetyl derivatives units to produce vinyl acetate ethylene emulsions and conventional emulsion polymers.

该公司还兴建的专业单位乙酰衍生物生产乙烯醋酸乙烯乳液和常规乳液聚合物。【已有0 位网友发表了看法，点击查看

Factory production of hot melt adhesive has passed SGS environmental protection certification, its main ingredient is one of ethylene vinyl acetate copolymer as the main material, adding tackifier and other ingredients together with solid-type adhesive.

本厂生产的热熔胶已通过SGS绿色环保认证，其主要成分是以乙烯一醋酸乙烯共聚物为主要材料，加入增粘剂与其它成份配合而成的固体型粘合剂。

It is envisaged that the spheres would be made of a plastic known as Ethylene tetrafluoroethylene, the material used to build the Beijing Aquatic Centre.

根据设想，这些气泡将由名为四氟乙烯的塑料制成，这种材料同样用在了北京水上运动中心。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。