查询词典 sieve classification

The invention relates to a synthesis method for an SAPO molecular sieve, which mainly solves the problems of low crystallinity and poorer performance of the SAPO molecular sieve in the prior art.

本发明涉及一种SAPO分子筛的合成方法，主要解决现有技术中SAPO分子筛结晶度低、性能较差的问题。

It is a new technique to synthesize SAPO 34 molecular sieve using cheap triethylamine (Et 3N) as the template, and the selectivity of this molecular sieve for ethene and propene can be improved further.

采用X射线衍射、扫描电镜、氨吸附红外光谱及核磁共振等表征手段，研究了以氟化氢三乙胺为复合模板剂合成的SAPO 34分子筛。

However,for the catalytic pyrolysis of sterically hindered PP,the effect of mesoporous molecular sieve sructure on pyrolysis results of PP is more important than that of mesoporous molecular sieve acidity.

而对于具有较大空间位阻的PP的催化裂解反应，催化剂酸性在一定范围内对PP的裂解结果影响不明显，表明催化剂孔结构的作用更重要，较大的孔径有利于PP的催化裂解。

The invention relates to a preparation method of the ZSM-5/mordenite compound molecular sieve, mainly solves the complex question which needs to add the seed crystal or subsect the crystallization in the existing compound molecular sieve synthesize process.

本发明涉及一种ZSM-5/丝光沸石复合分子筛的制备方法，主要解决现有复合分子筛合成过程中需加入晶种或需要分段晶化等较为复杂的问题。

Perforated like a sieve .I don't remember her name. I have a head like a sieve .

我忘记了她的名字，我的脑壳像筛子，记性太坏。

For the coked 5A molecular sieve, using air as regeneration gas at a space velocity of 720h-1, a regeneration temperature of 350℃ and a regeneration time of 1h, the activity of the regenerated molecular sieve could reach 96% of that of the fresh one.

对于结焦5A分子筛，以空气为再生气体，在空速为720h-1、350℃条件下再生1h的吸附活性可以达到新鲜5A分子筛的96%左右。

In order to prolong the running cycle of producing high purity n-hexane from reformate raffinate through adsorption-distillation technology, coking of olefins in the channels of 5A molecular sieve and regeneration of coked 5A molecular sieve were studied by microstructure analysis.

为实现吸附-精馏耦合由重整抽余油生产高纯度正己烷工艺的长周期运行，采用微结构分析方法研究了烯烃在5A分子筛孔道中的结焦行为及失活分子筛的再生工艺。

And the country among major cities has sales outlets, the main products include all types of standard screen, coal Sieve, sieve coking and analysis equipment, laboratory equipment, building materials, road equipment and accessories.

浙江省上虞市水仙仪器有限公司是一家专业从事机械科研试验仪器生产的企业，下设兰州水仙仪器有限公司，并在全国各大中城市设有销售网点，主要产品有各类标准筛、煤样筛、焦化筛和分析仪器、化验设备、建材、公路仪器及配件。

By analyzing the mineral composition and chemical composition of coal fly ash as well as synthetical mechanism of the 4A molecular sieve ,the technological flowsheet for preparing 4A molecular sieve from coal fly ash with hydrothermal method has been designed.

通过分析粉煤灰的矿物组成、化学成分和4A分子筛合成机理，设计了粉煤灰水热法制备4A分子筛的工艺流程，并重点介绍了粉煤灰的n(S iO2)/n(A l2O3)、n(Na2O)/n(S iO2)、n(H2O)/n(Na2O)、凝胶形成温度和时间、晶化温度和时间以及晶种添加等方面的原理及工艺参数选择情况，可为粉煤灰合成高品质的A型沸石提供借鉴。

ZSM the low pulse pair of drum sieve used in the net outflow double drum screen structure, configuration of high-precision adjustable gap inside and outside the rotor, rotor reasonable shape and form of arrangement with the advanced matched corrugated drum sieve can be fully raise The ability to sift through the pressure, a significant reduction in power consumption and a plasma pulse.

ZSM双鼓式低脉冲网前筛采用内、外流双筛鼓结构，配置可调间隙的高精度内、外旋翼，合理的旋翼形状及其布置形式与先进的波纹筛鼓相配合，可充分提高压力筛的通过能力，显著降低动力消耗及出浆脉动。

In the chapter 2, the theoretic knowledge about the photosensitive resin and the grinding tools was firstly introduced.

第二章阐述了光固化树脂结合剂磨具的相关理论研究。

Do not use the program's indenting or margin-setting features; these will be added during typesetting.

不要使用缩排，页面边缘设置之类的选项，偶看不大懂。