The research group led by Researcher Tian Zhijian from Dalian Institute of Chemical Physics, Chinese Academy of Sciences has recently made new progress in the study of molecular sieve synthesis mechanism. The results were published in the recently published "Journal of the American Chemical Society". In recent years, the research group has been devoted to the study of new methods and mechanisms of molecular sieve synthesis. It has reported for the first time microwave-assisted ion-thermal synthesis of molecular sieves, and also discovered the unique structure-directing role of organic amines in the process of ion-thermal synthesis of molecular sieves. Water plays a very important role in the synthesis of molecular sieves. However, due to the ubiquitous presence of water, its influence on the crystallization process of molecular sieve is difficult to study and prove experimentally. The study creatively selected pseudo-boehmite (AlOOH), ammonium dihydrogen phosphate (NH4H2PO4) and ammonium fluoride (NH4F) that were completely free of water as the reaction raw materials, thus realizing the ion-thermal synthesis system completely free of free water Preparation of molecular sieves. Based on this system, the effect of the addition of reaction dose of water on the crystallization process of molecular sieve was quantitatively studied. It was found that when no water was added, the molecular sieve slowly crystallized under the action of trace autogenous water; once the reaction dose of water (H2O / Al = 1, molar ratio) was added, the crystallization kinetics of the molecular sieve was extremely high. Big improvement. This proves that the crystallization process of the molecular sieve is an autocatalytic process; the addition of the reaction dose of water or other polar species can greatly promote the crystallization process of the molecular sieve. The study was highly evaluated by four reviewers and agreed that this is "the first time that it has clearly demonstrated the extreme sensitivity of molecular sieve formation to water content." Fruits Cart: Fruits Cart Fruits Cart,Fruits Cart Basket,Fruits Cart Rack Xinhui Mingcheng Hardware Mamufacture Limited of Jiangmen City , https://www.gd-jmmc.com
Fruit cart with wheels is large enough to storage all kinds of fruits, and it is flexible and convenient to move. The open design allow the fruits to be well ventilated. Its modern wire scroll design can decorate your kitchen and living room. It is easy to assemble the whole cart, and it will be in steady. Fruit rack cart comes in a variety of sizes that can meet your requirements, such as two tier cart, three tier cart and four tier cart. Welcome new and old customers contact us, and we will provide first-class products and quality service to you.
New progress has been made in the synthesis mechanism of molecular sieve of Dalian Institute of Chemical Physics, Chinese Academy of Sciences