查询词典 sieve part

In this dissertation, Lanthanum is used to substitute part of Phosphorus or Aluminium in the framework and enter into the tetrahedron structure unit of oxygen negative ion for obtaining a kind of heteroatom molecular sieve with acidity.

本论文中，用镧原子同晶取代SAPO-n分子筛骨架中的部分铝或磷，进入骨架中的氧负离子四面体结构单元，得到具有一定酸性的杂原子硅磷酸铝分子筛。

The invention discloses a dielectric hole-microhole composite material and synthesizing method in the inorganic porous material, adsorbing material and catalytic material technical domain, which comprises the following steps: adopting zeolite molecular sieve as raw material; reacting with sodium bisilicate solution under 30-60 deg.c for 10-300 min; disintegrating particle part of zeolite molecular sieve into piece with microhole structure; adding cetyl trimethyl ammonium bromide as molder; adjusting pH value of mother liquid to 10-12; aging 1-8h; adding in the high-pressure autoclave to do water heat synthesizing reaction at 80-130 deg.c for 24-72h; separating solid; washing; drying; sintering under 500-600 deg.c for 5-10h; obtaining the Si-Al porous material with dielectric hole and microhole composite structure.

本发明属于无机多孔材料、吸附材料和催化材料技术领域，涉及具有介孔-微孔复合材料及其合成方法。其特征是以沸石分子筛为原料，用偏硅酸钠的水溶液在30～60℃反应10～300分钟，使沸石分子筛的颗粒部分解离形成具有微孔结构的碎片，加入模板剂十六烷基三甲基溴化铵，然后调节母液pH值为10～12，老化1～8小时，然后加入高压釜于80～130℃进行水热合成反应。反应24～72小时后，分离出固体，水洗、干燥，然后于500～600℃焙烧5～10小时，得到具有介孔和微孔复合结构的硅铝多孔材料。本发明的效果和益处是所发明的合成方法可用于合成多种沸石结构和介孔结构的复合材料，所合成的材料经过质子交换可以具有较强的酸性，在吸附和催化领域具有广泛应用前景。

In the second part, the supported mesoporous sieve solid base KNO_3/MCM-48 and KAc/MCM-48 were prepared. And it was the first time that KNO3/MCM-48 and KAc/MCM-48 were used as catalysts for the synthesis of dipropyl carbonate by transesterification of propanol and dimethyl carbonate.

第二部分研究了负载型KNO_3/MCM-48和KAc/MCM-48固体碱的的制备，并首次将这类催化剂应用到丙醇和碳酸二甲酯酯交换法合成碳酸二丙酯的反应中。

This is China's censorship machine, part George Orwell , part Rube Goldberg: an information sieve of staggering breadth and fineness, yet full of holes; run by banks of advanced computers, but also by thousands of Communist Party drudges; highly sophisticated in some ways, remarkably crude in others.

这就是中国的审查机器，无所不在却又繁琐不堪。它是一个有惊人广度和细度的信息筛网，但也充满漏洞，通过先进的计算机组运行，但也由成千上万共产党苦力推动，在某些方面非常先进，在另一些方面却相当粗制滥造。

Large air separation plant 40000m3/h, This plant adopts molecular sieve system to adsorb CO2, C2H2, moisture and CnHm in air to pre-purify air, by use of air booster compressor, to pressurize some of purified feed air by two sections, pressurized air to warm up high pressure liquid oxygen in high pressure coil heat exchanger to ambient temperature and delivere out off cold box to coal gasification, some pressurizrd air by first section is drawn from middle part of coil heat exchanger and expanded in medium pressure expander then led into lower column, other part of pressurized air by second section is drawn from cold end of coil heat exchanger and led into lower column after throttling, un-pressurized feed air is cooled by return gas in plate fin heat exchanger and led into lower column.

产品描述：采用常温分子筛空气预净化系统吸附空气中的CO2、C2H2、水份和一些碳氢化合物，使用单独的空气增压压缩机将部分净化后的原料空气分为两段增压，增压后的空气在高压绕管式换热器中将经液氧泵加压的高压液氧汽化并复热至常温送出冷箱直接供煤气化工序使用，第一段增压后的空气，部分从绕管式换热器中部抽出经电机制动的中压透平膨胀机膨胀后送入下塔，另一部分经第二段增压后从绕管换热器的冷端抽出节流后送入下塔，未经增压的原料空气在板翅式换热器中被低压返流气体冷却后进入下塔。

The condensing tower comprises a gravity settling chamber where a set of loading trays is fixed, wherein the middle-lower part of the condensing tower mounts a round condenser tube, of which the upper and lower ends is connected with a sieve pore type baffle, in manner of closest arrangement based on the round section. The upper part of the condensing tower comprises a spherical cover without hem, a pre refrigerating chamber, a gas pipe type refrigerated trap, and the lower there of is a passive cold trap.

冷凝塔包括重力沉降室，沉降室内安有一组承料盘，冷凝塔中下部有按圆截面最紧密排列的方式设置圆形冷凝管，冷凝管上、下端联接有筛孔状隔板；冷冻塔上部分包括无折边球形塔盖，预冷冻室和气管式冷冻捕集器，下部分为无源冷阱捕集器。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。