1)  4A molecular sieve
4A型分子筛
2)  nano 4A molecular sieves
纳米4A型分子筛
3)  4A
4A
1.
The 4A, 13X and LSX zeolites were ion exchanged with Li+ repeatedly in water solution, then the adsorption isotherms and breakthrough curves of these zeolites were measured at 25℃ The data demonstrate that 4A, 13X and LSX highly ion-exchanged with Li+ have higher adsorption capacity and better adsorption selectivity for N2 over Ar.
采用水溶液离子交换法制备了高Li+交换度的4A、13X和LSX分子筛,并在25℃下测定了它们的静态吸附等温线和动态穿透曲线。
4)  C4.4A
C4·4A
1.
Expression and diagnostic application of C4.4A protein in squamous cell carcinoma and adenocarcinoma;
C4·4A蛋白在鳞状细胞癌和腺癌中的表达差异及其意义
5)  4A zeolite
4A 沸石
1.
This paper introduces the producing tech- nology and status of detergent builder in our country,and then analyzes the function compare of 4A zeolite,sodium metasili- cate,δ-Layered Sodium Silicate detergent builder and then proposes the 8-Layered Sodium Silicate is the best product to substitute STPP,sodium metasilicate,4A zeolite.
文章介绍了国内硅化合物中各洗涤助剂的生产工艺技术及生产状况,并对4A 沸石、偏硅酸钠、δ层硅等助洗剂的性价比作了客观分析。
6)  zeolite 4A
4A沸石
1.
Study on the synthesis of zeolite 4A and geopolymer and ion-exchange;
4A沸石和地质聚合物的合成与离子交换性能的研究
2.
New development of additive of non-phosphorous detergent-zeolite 4A;
无磷洗涤剂助剂4A沸石的新进展
3.
Influences of inorganic salt on crystallization of zeolite 4A;
无机盐对4A沸石晶化过程的影响
参考词条
补充资料:A型分子筛
分子式:
CAS号:

性质:具有立方晶格,微孔结构的白色粉末或颗粒。有3A、4A、5A三种型号,3A型组成0.40K2O•0.60 Na2O•A12O3•2.00SiO2·4.50H2O,孔径3.0~3.3 Å (1Å =10-10m);4A型组成Na2O·A12O3·2SiO2·4.5H2O,孔径4.2~4.7 Å;5A型组成0.70CaO·0.30Na2O·A12O3·(2.00±0.08)SiO2·4.5H2O,孔径4.9~5.6Å。无味,无臭。无毒。无腐蚀性。不溶于水和有机溶剂,溶于强酸和强碱。热稳定性高。表面积大。对极性分子和饱和分子优先吸附,被吸附的气体和液体能解吸。具有高吸附性和按分子大小选择吸附的特点。有离子交换性和催化活性。使用后可再生。由水玻璃、偏铝酸钠和氢氧化钠按一定摩尔比混合,反应,经结晶,过滤,洗涤,离子交换(3A型加氯化钾,交换率40%;5A型加氯化钙,交换率70%),再洗涤,烘干,得原粉,再加入粘接剂捏合。成型。灼烧。活化而制得。广泛用于气体和液体的干燥、脱水、净化、分离、吸附,以及石油加工催化裂化过程和催化剂载体。

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