EMM-25 Borosilicate Molecular Sieve Catalytic Efficiency

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current molecular sieve materials, such as zeolites, face limitations in their pore size and catalytic efficiency for specific hydrocarbon conversion reactions, necessitating the development of a novel borosilicate molecular sieve with tailored structure and composition for enhanced catalytic properties.

Innovation Solution

The synthesis of a borosilicate molecular sieve, EMM-25, using specific organic templates and a structure directing agent, with a unique framework connectivity and composition, allowing for controlled pore formation and improved catalytic activity in hydrocarbon conversion reactions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional zeolite molecular sieves are used, then they provide basic catalytic activity for hydrocarbon conversion, but they exhibit limited catalytic efficiency and insufficient thermal stability for specific reactions

Engineering Contradiction:

Improvecatalytic efficiencyVSAvoidreaction specificity

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by creating specific Al-B dual active sites within the molecular sieve framework. The aluminum and boron atoms are positioned at specific tetrahedral locations (T1-T6) with defined connectivity patterns, creating localized catalytic centers with enhanced activity and specificity for particular hydrocarbon conversion reactions while maintaining overall framework stability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs parameter changes by modifying the molecular sieve composition to include specific Al-B dual active sites with controlled ratios. The synthesis parameters are optimized to achieve the desired Al-B site distribution and framework structure, resulting in enhanced catalytic efficiency and thermal stability compared to conventional zeolites.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If molecular sieve materials with tailored pore sizes are developed, then catalytic selectivity improves, but synthesis complexity and manufacturing difficulty increase

Engineering Contradiction:

Improvepore size controlVSAvoidsynthesis process complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by using organic structure-directing agents (OSDAs) during the synthesis process. These OSDAs are introduced beforehand to guide the formation of the desired molecular sieve structure with specific pore sizes and Al-B dual active sites. The OSDAs direct the self-assembly of the framework, simplifying the synthesis process while achieving precise structural control.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses organic structure-directing agents as intermediaries to mediate the formation of the molecular sieve structure. These agents temporarily occupy specific positions during synthesis, guiding the arrangement of aluminum and boron atoms to create the desired Al-B dual active sites and pore structure. The OSDAs are subsequently removed, leaving the tailored framework behind.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

EMM-25 demonstrates improved catalytic performance and thermal stability, enabling efficient conversion of organic compounds and offering a versatile catalyst for various industrial processes, including cracking, alkylation, and isomerization.

Implementation Method 1

a new zeolite structure, designated EMM-25, has now been synthesized using at least one of the following four organic templates: N,N,N',N'-tetrahexyl-N,N'-dimethylbutane-1,4-diammonium, N, N'-dihexyl-N,N'-dipentyl-N,N'-dimethylbutane-1,4-diammonium, N,N,N',N'-tetrapentyl-N,N'-dimethylbutane-1,4-diammonium, N,N'-dipentyl-N,N'-dibutyl-N,N'-dimethylbutane-1,4-diammonium, and mixtures thereof

Methodology Applied

Scientific EffectStructure directing: