分子篩有天然沸石和合成沸石兩種。它是一種人工合成且對水分子有較強吸附性的干燥劑產品。分子篩的孔徑大小可以通過加工工藝的不同來控制，除了吸附水汽，它還可以吸附其他氣體。分子篩具有均勻的微孔結構，它的孔穴直徑大小均勻，這些孔穴能把比其直徑小的分子吸附到孔腔的內部，并對極性分子和不飽和分子具有優先吸附能力，因而能把極性程度不同，飽和程度的不同，分子大小不同及沸點不同的分子分離開來，即具有“篩分”分子的作用，故稱分子篩。

1、具有極高，深度干燥分離度；

2、可以有效地避免分離時所產生共吸附現象，提高產品得率；

3、可以在同一系統中同時完成干燥和物質的純化；

4、在較高的溫度條件下，同樣具有一定的吸附容量；

5、分子篩系統較其他干燥和分離裝置，設備投資低，運轉成本低。

3A分子篩的孔徑是3A，主要用于吸附水，不吸附直徑大于3的任何分子，根據工業上的應用特點，分子篩具有快吸附速度、再生次數、抗碎強度及抗污染能力，提高了分子篩的利用效率并延長了分子篩的使用壽命，是石油、化工行業中氣液相深度干燥、精煉、聚合所必需的干燥劑。

4A分子篩的孔徑為4A，吸附水， 、乙醇、 、、 、乙烯、 ，不吸附直徑大于4A的任何分子(包括 )，對水的選擇吸附性能高于任何其他分子，是工業上用量 的分子篩品種之一。

5A分子篩的孔徑為5A，能吸附小于該孔徑的任何分子，主要應用于正異構烴分離、變壓吸附分離及水和 的共吸附，基于5A分子篩的工業應用特點，我們生產的5A分子篩選擇吸附高、吸附速度快、特別適用于變壓吸附，可適應各種大小的制氧、制氫、制 等氣體變壓吸附裝置，是變壓吸附行業中的選擇。

13X型： 酸鹽的晶體結構不同（ 比大小不同樣），形成孔徑為9D10A的分子篩晶體，稱為13X（又稱鈉X型）分子篩；用Ca2+交換13X分子篩中的Na+，形成孔徑為9A的分子篩晶體，稱為10X（又稱鈣X型）分子篩。

Molecular sieve is introduced
Molecular sieve has two kinds of natural zeolite and synthetic zeolites.It is a synthetic and strong adsorption of water molecules of desiccant products.Molecular sieve aperture size can be controlled by different processing, in addition to the adsorption of water vapor, it can also be other gas adsorption.The microporous structure of the molecular sieve is uniform, and its cavity diameter size uniform, can the cavity is smaller than the diameter of the molecular adsorption to the interior of the pore space, and the polar molecules and unsaturated molecules have preferential adsorption ability, thus can bring a different polarity degree, the degree of saturation is different, different molecular size and the boiling point of different molecular separation, which have the function of the "screening" molecules, therefore calls the molecular sieve.
Molecular sieve characteristics
1, has a very high, deep dry separating degree;
Produced during the 2, can effectively avoid the separation of adsorption phenomenon, improve the product yield;
3, can be done in the same system at the same time drying and purification of materials;
4, under the condition of high temperature, also has certain adsorption capacity;
5, molecular sieve system than other dry and separation devices, low equipment investment, operation cost is low.

3 a molecular sieve pore size is 3 a, mainly used for the adsorption of water, not any molecular adsorption diameter greater than 3 a, according to the industrial characteristics of application of molecular sieve has a fast adsorption speed, number of regeneration, crushing strength and ability to resist pollution, improve the utilization efficiency of the molecular sieve and prolong the service life of molecular sieve, dry gas liquid phase depth is petroleum, chemical industry, refining, necessary of desiccant polymerization.
Aperture for 4 a, 4 a zeolite adsorption of water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene, not any molecular adsorption diameter greater than 4 a (propane), the selection of water adsorption performance than any other molecules, one of the largest varieties of molecular sieve is industrial use.
5 a molecular sieve pore size for 5 a, can adsorption is less than the diameter of any molecule, is mainly used in heterogeneous hydrocarbon separation, pressure swing adsorption, adsorption separation and water and carbon dioxide, based on the industrial application characteristics of 5 a molecular sieve, we in the production of 5 a molecular sieve choose high adsorption, adsorption speed, especially suitable for the pressure swing adsorption, can adapt to all kinds of size of oxygen, hydrogen, carbon dioxide and other gases pressure swing adsorption device, is the best choice in industry pressure swing adsorption ().
13 X: silicon aluminium acid salt crystal structure is different (silica alumina ratio, size is not the same), the formation of aperture for 9-10 a molecular sieve crystal, known as molecular sieve 13 X (X) is also called sodium;Exchange with Ca2 + Na + in the 13 X molecular sieve, formation aperture for 9 a zeolite crystals, called 10 X (also known as calcium X) molecular sieve.

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