Molecular Sieve

Molecular sieves are crystalline metal alumino silicates having a three dimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size.

A 4 to 8-mesh sieve is normally used in gasphase applications, while the 8 to 12-mesh type is common in liquidphase applications. The powder forms of the 3A, 4A, 5A and 13X sieves are suitable for specialized applications.

Long known for their drying capacity (even to 90°C), molecular sieves have recently demonstrated utility in synthetic organic procedures, frequently allowing isolation of desired products from condensation reactions that are governed by generally unfavorable equilibria. These synthetic zeolites have been shown to remove water, alcohols (including methanol and ethanol), and HCl from such systems as ketimine and enamine syntheses, ester condensations, and the conversion of unsaturated aldehydes to polyenals.

Type 3A |

Type 4A |

Type 5A |

Type 13X|

Type AA

3A MS

The pore size of 3A molecular sieve is 3A (Ångstrom). It does not adsorb any molecule larger than 3A. According to the industrial application specialties, we endue our products with the characters of higher adsorption speed, stronger crushing and anti-contaminative resistance, more cyclic times and longer work-span.

All these advantages have made it become the most essential and necessary desiccant in the fields of the deep drying, refinery polymerization for cracked gasses, ethylene, propylene and any other non-acidic gasses of liquids in petroleum and chemical industrials.

Chemical Formula

K₂O.Na₂O.Al₂O₃.SiO₂.H₂O

Major Applications

Commercial dehydration of unsaturated hydrocarbon streams, including cracked gas, propylene, butadiene, acetylene; drying polar liquids such as methanol and ethanol. Adsorption of molecules such as NH3 and H2O from a N2/H2 flow. Considered a general-purpose drying agent in polar and nonpolar media.

Technical Parameter:

Item	Unit	Target
Shape		Pellet		Sphere
Diameter	mm	1.5-1.7	3.0-3.3	1.7-2.5	3.0-5.0
Size ratio up to grade	%	≥98	≥98	≥96	≥96
Bulk density	G/ml	≥0.60	≥0.60	≥0.60	≥0.60
Wear ratio	%	≤0.20	≤0.25	≤0.20	≤0.20
Crushing strength	N	≥45cm	≥60/cm	≥45/p	≥60/p
Statich2o adsorption	%	≥20	≥20	≥20	≥20
Packing water	%	≤1.5	≤1.5	≤1.5	≤1.5

This is the typical parameter for type 3A molecular sieves, different applications of MS require different technical parameters, please contact us to for further details.

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4A MS

The pore size for 4A molecular sieve is 4A (Ångstrom). It is mainly used to adsorb water, methanol, ethanol, sulfureted hydrogen, carbon dioxide, ethylene, propylene, does not adsorb any larger molecular than 4A, and often used as desiccant in industrials.

Chemical Formula

Na₂O·Al₂O₃·SiO₂·H₂O

Major Applications

Preferred for static dehydration in closed liquid or gas systems, e.g., in packaging of drugs, electric components and perishable chemicals; water scavenging in printing and plastics systems and drying saturated hydrocarbon streams.Adsorbed species include SO₂, CO₂, H₂S, C₂H₄, C₂H₆, and C₃H₆. Generally considered a universal drying agent in polar and nonpolar media.

Technical Parameter:

Item	Unit	Target
Shape		Pellet		Sphere
Diameter	mm	1.5-1.7	3.0-3.3	1.7-2.5	3.0-5.0
Size ratio up to grade	%	≥98	≥98	≥96	≥96
Bulk density	g/ml	≥0.60	≥0.60	≥0.60	≥0.60
Wear ratio	%	≤0.20	≤0.25	≤0.20	≤0.20
Crushing strength	N	≥30	≥45	≥60	≥70
H2O adsorption	%	≥20.5	≥20.5	≥20.5	≥20.5
Packing water	%	≤1.5	≤1.5	≤1.5	≤1.5

This is the typical parameter for type 4A molecular sieves, different applications of MS require different technical parameters, please contact us to for further details.

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5A MS

The pore size for 5A molecular sieve is about 5A (Ångstrom). It can adsorb all kinds of molecular smaller than this size, it is mainly used in separation of the normal and isomerous alkane; pressure swing adsorption (PSA) for gases; co-adsorption of moisture and carbon dioxide.

Based on the industrial application specialties, we have produced out our own PSA molecular sieve products, which have better selective adsorb ability and more rapid adsorption speed, being the elaborated products, it could suitable for gases generation and concentration PSA plants of any sizes and any types in the world.

Chemical Formula

CaO·Na2O·Al2O3·SiO2·H2O

Major Applications

Separation of normal paraffins frombranched-chain and cyclic hydrocarbons; removal of H₂S, CO₂ and mercaptans from natural gas. Molecules adsorbed include nC₄H₁₀, nC₄H₉OH, C₃H₈ to C₂₂H₄₆, and dichlorodifluoro-methane (Freon 12^®).

Item	Unit	Target
Shape		Pellet		Sphere
Diameter	mm	1.5-1.7	3.0-3.3	1.7-2.5	3.0-5.0
Size ratio up to grade	%	≥98	≥98	≥96	≥96
Bulk density	g/ml	≥0.60	≥0.60	≥0.60	≥0.60
Wear ratio	%	≤0.20	≤0.25	≤0.20	≤0.20
Crushing strength	N	≥30/cm	≥45/cm	≥30/p	≥60/p
Water adsorption	%	≥21.5	≥21.5	≥21.5	≥21.5
N-hexane adsorption	%	≥14	≥14	≥14	≥14
Packing water	%	≤1.5	≤1.5	≤1.5	≤1.5

This is the typical parameter for type 5A molecular sieves, different applications of MS require different technical parameters, please contact us to for further details.

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13X MS

The pore size for 13X molecular sieve is about 10 Ångstrom. It can adsorb any molecular smaller than 10A,mainly used as catalyze carrier , co adsorption of CO2 and H2O and H2O , H2O and H2S ,as desiccant for medical and air compressor systems ,and can also be adjusted to fit other various applications.

Chemical Formula

Na₂O. Al₂O₃.SIO₂.H₂O

Major Applications

Commercial gas drying, air plantfeed purification (simultaneous H₂O and CO₂ removal) and liquid hydrocarbon/natural gas sweetening (H₂S and mercaptan removal).

Item	Unit	Target
Shape		Pellet			Sphere
Diameter	mm	2-3	3-5	5-8	1.6	3.2
Size	≥%	96	96	96	96	96
Bulk density	≥G/ml	0.66	0.64	3	0.61	0.61
Wear ratio	≤% wt	0.10	0.10	0.10	0.30	0.30
Crushing strength	N	40	80	120	30	40
Static H2O adsorption	≥mg/g	260	260	260	260	260
CO2 air disposal	≥mg/g	180	180	180	180	180
Packing water	≤% wt	1.5	1.5	1.5	1.5	1.5

This is the typical parameter for type 13X molecular sieves, different applications of MS require different technical parameters, please contact us to for further details.

Typical applications: Purification and removal of H2O and CO2.
Dehydration and desulfuration of nature gas, liquid petrol gas and liquid alkanet.
Deep dry of common gases.

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Active Alumino (AA) Desiccant

Type x-p active alumino desiccant is kind of spherical hard granule full of many invisible fine pore .It is no corruptive, non toxic, and has close affinity to polar molecule.

This product is typically used as effective desiccant it has high adsorption capacity for moisture deep dew point control (-45℃), and low regeneration temperature (150℃),it is widely used in petrol chemical, textile and air-separation field.

Chemical Formula

AL₂O₃

Major Applications

Commercial gas drying, air plantfeed purification (simultaneous H₂O and CO₂ removal) and liquid hydrocarbon/natural gas sweetening (H₂S and mercaptan removal).

Item	3-5 mm Sphere	4-6 mm Sphere
Bulk density (g/ml)	≥0.70	≥0.68
Surface area sqm/g	260-300	260-300
Pore volume ml/g	0.38-0.42	0.38-0.42
Static adsorption (RH=60%)	16-18	16-18
Crushing strength N/P	≥90	≥120
Abrasion (%)	≤0.40	≤0.40

This is the typical parameter for type AA molecular sieves, different applications of MS require different technical parameters, please contact us to for further details.

Notice items:

Do not unpack the package before using in order to avoid damp
This product can control the dew point min : -45℃.
This product can be used and regenerated again and again.

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