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Small crystal, high surface area EMM-30 zeolites, their synthesis and use

A mixture and molar ratio technology, applied in the direction of crystalline aluminosilicate zeolite, borocarbane silicone crystalline aluminosilicate zeolite, silicon compound, etc., can solve the problem of deactivation rate reduction

Pending Publication Date: 2018-09-28
EXXONMOBIL RESEARCHK & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in some processes, it has been observed that when the external specific surface area of ​​ZSM-5 zeolites increases, the rate of deactivation decreases

Method used

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  • Small crystal, high surface area EMM-30 zeolites, their synthesis and use
  • Small crystal, high surface area EMM-30 zeolites, their synthesis and use
  • Small crystal, high surface area EMM-30 zeolites, their synthesis and use

Examples

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Embodiment approach 1

[0077] Embodiment 1. A method for making a crystalline material having an MFI and / or MEL framework type, the method comprising: (i) preparing a synthesis mixture capable of forming a crystalline material, the mixture comprising oxidation of the tetravalent element Y source of trivalent element X, optionally a source of alkali metal and / or alkaline earth metal (M), water and tetrabutylammonium cations and / or tetrabutylammonium Cationic directing agent (Q 1 ), wherein the composition of the synthesis mixture comprises at least one of: (a) about 10 or less (e.g., about 5 or less) H 2 O / YO 2 molar ratio; and (b) YO less than about 150 2 / X 2 o 3 molar ratio; (ii) heating the mixture under crystallization conditions comprising a temperature of from about 80°C to about 220°C and a period of from about 4 hours to about 28 days until crystals of the crystalline material are formed; and (iii) from step (ii) to recover the crystalline material.

Embodiment approach 2

[0078] Embodiment 2. A method for making a crystalline material having said MFI and / or MEL framework type, said method comprising: (i) preparing a synthesis mixture capable of forming said crystalline material, said mixture comprising tetravalent A source of oxides of the element Y, optionally a source of the trivalent element X, optionally a source of alkali metals and / or alkaline earth metals (M), water and 1,5-bis(N-tributylammonium) Directing agent for pentane dianion and / or 1,6-bis(N-tributylammonium)hexane dianion (Q 2 ); (ii) heating the mixture under crystallization conditions comprising a temperature of from about 80°C to about 220°C and a period of from about 4 hours to about 28 days until crystals of the crystalline material are formed; and (iii) from step ( ii) to recover the crystalline material.

Embodiment approach 3

[0079] Embodiment 3. The method according to embodiment 1 or embodiment 2, wherein X includes one or more of B, Al, Fe, and Ga, and Y includes one of Si, Ge, Sn, Ti, and Zr one or more species.

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Abstract

A process is disclosed for producing small crystal, high surface area crystalline materials having the MFI and / or MEL framework-type, designated as EMM-30, using as a structure directing agent tetrabutyl ammonium cations and / or tetrabutylphosphonium cations, or l,5-bis(N- tributylammonium)pentane dications, and / or l,6-bis(N-tributylammonium)hexane dications. The compositions made according to thatprocess, as well as the various dication compositions themselves, are also disclosed.

Description

technical field [0001] The present invention relates to small crystal size, high specific surface area crystalline materials of the MFI and / or MEL framework type, referred to as EMM-30, their synthesis and their use as adsorbents and catalysts for organic transformation reactions. Background technique [0002] Crystalline materials are classified by the Structure Committee of the International Zeolite Association according to the rules of the IUPAC Zeolite Nomenclature Committee. According to this classification, framework-type zeolites and other crystalline microporous crystalline materials of established structures are assigned three-letter codes and are described in the Atlas of Zeolite Framework Types, sixth edition revision, Elsevier (2007). [0003] One known crystalline material whose structure has been established is a material named with an MFI framework type, most notably including ZSM-5. Crystalline ZSM-5 and its conventional preparation using tetrapropylammonium...

Claims

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Application Information

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IPC IPC(8): C01B37/02C01B39/36C01B39/40C07C211/63
CPCC01B37/02C01B39/365C01B39/40C07C211/63C01P2004/64C01P2006/12C01B39/36B01J20/18B01J20/3085C01B39/48Y02P20/52B01J20/28064B01J20/3057B01J29/40B01J29/70B01J35/617B01J37/0018B01J37/009B01J37/04B01J37/10
Inventor 艾伦·W·伯顿卡尔·G·施特罗迈尔莫贝·阿芙沃尔基克里斯蒂娜·E·克利韦尔
Owner EXXONMOBIL RESEARCHK & ENG CO
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