Product name: MOR zeolites (toluene disproportionation)

Products Description

MOR zeolites, also known as MFI zeolite, is a crystalline silicoaluminophosphate with a unique structure. It consists of interconnected SiO4 and AlO4 tetrahedra through oxygen bridges, forming a framework with one-dimensional channels. The crystal structure belongs to the monoclinic system and appears as needle-shaped or fibrous crystals, typically in white color. The maximum and minimum pore diameters are 0.7nm and 0.58nm, respectively, with an average of 0.66nm. The main channels are composed of 12-membered rings, and the silicon-to-aluminum ratio (SiO2/Al2O3 molar ratio) ranges from 8 to 20.

In the crystal structure of silicalite-1, not only are four-membered, six-membered, and eight-membered rings present, but there is also a significant proportion of five-membered rings. These five-membered rings are paired together, sharing two tetrahedra. Paired five-membered rings can further connect with another pair of five-membered rings through oxygen bridges, forming four-membered rings at the connection points. If additional rings are connected in a similar manner, eight-membered and twelve-membered rings can be formed. The crystal of silicalite-1 is composed of multiple layers stacked together and linked in a suitable manner. As a result, the crystal contains numerous straight channels with the largest diameter being the cylindrical pores formed by the twelve-membered rings, which are the main channels of silicalite-1. The cross-section of these channels appears elliptical, with a major axis diameter of 0.695nm and a minor axis diameter of 0.581nm. They resemble bundled tubes and differ significantly from the cage-like pores of A, X, and Y zeolites. In practice, the cylindrical pores exhibit a certain degree of twisting, meaning that the layers are not perfectly aligned but have some displacement. Therefore, the average diameter may decrease from 0.66nm to 0.4nm. Small channels also connect the main channels of silicalite-1, but their pore size (approximately 0.39nm) is too small for most molecules to enter. They mainly serve as entry and exit pathways within the main channels. In terms of molecular access, the crystal of silicalite-1 can be considered to provide two-dimensional space, while A-type, X-type, and Y-type zeolites are known for their three-dimensional space.

Product advantages

MOR zeolite has such advantages like below:

● High thermal stability: Mordenite Zeolite (MOR) exhibits excellent stability at high temperatures, making it suitable for various industrial applications.

● Acid resistance: It has exceptional resistance to acid, ensuring its durability and longevity in acid-related processes.

● Effective adsorption capacity: The structure of mordenite Zeolite (MOR) enables it to selectively adsorb molecules of different sizes, contributing to its efficient use in separation and purification processes.

● Catalytic properties: This zeolite material has catalytic properties, which makes it suitable for use as a catalyst in various chemical reactions.

● Versatile applications: Mordenite Zeolite (MOR) finds applications in areas such as petrochemical refining, gas separation, environmental remediation, and adsorption-based processes.

Product Specifications

Performance Characterization	Na-type powder	H-type powder	Remarks
Crystal Type	M	M
Relative Crystallinity %	＞90	＞90	Low silicon/ High silicon type
SiO₂/Al₂O₃	Around10/15~30	Around 10/15~30
NaO₂, %	3-6	＜0.1-0.2%
Specific surface area, m²/g	400-550	400-550