Amorphous Magnesium Carbonate Filter for Smoke Filtration

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Solution Overview

Problem

Current smoking article filters, whether combustible or non-combustible, face issues with particle breakthrough and taste contamination due to activated carbon, which also fail to regulate humidity effectively.

Innovation Solution

Incorporating amorphous magnesium carbonate with a high surface area and hygroscopic properties into the filter to selectively remove constituents from smoke or aerosol without affecting taste, while maintaining moisture levels and reducing the need for activated carbon.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If activated carbon granules are used in filters to remove smoke constituents, then harmful constituents are removed, but particle breakthrough occurs due to carbon fines and taste is negatively affected

Engineering Contradiction:

Improveremoval of harmful constituentsVSAvoidcarbon fines and taste contamination

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The invention changes the physical and chemical parameters of the sorbent material by using amorphous magnesium carbonate instead of activated carbon granules. This material has high surface area (greater than 100 m2/g) and appropriate pore structure that allows effective adsorption of harmful constituents while preventing particle breakthrough and maintaining taste quality.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention employs a composite filter structure combining cellulose acetate tow with amorphous magnesium carbonate material. This composite approach integrates the filtration capabilities of cellulose acetate with the high surface area adsorption properties of amorphous magnesium carbonate, achieving effective constituent removal without the drawbacks of activated carbon.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If activated carbon is used to adsorb smoke constituents, then harmful substances are removed, but the taste of smoke becomes dry or has carbon notes

Engineering Contradiction:

Improveremoval of harmful constituentsVSAvoidtaste quality

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The invention changes the material parameters by substituting activated carbon with amorphous magnesium carbonate, which has different surface chemistry and pore characteristics. This material achieves effective adsorption of harmful constituents while maintaining neutral taste properties, eliminating the dry or carbon-like taste notes associated with activated carbon.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If activated carbon granules are used in filters, then harmful constituents are removed, but particle breakthrough occurs during transport and handling

Engineering Contradiction:

Improveremoval of harmful constituentsVSAvoidparticle breakthrough prevention

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The invention changes the physical parameters of the sorbent material by using amorphous magnesium carbonate with high surface area and appropriate particle morphology. This material maintains structural integrity during transport and handling, preventing particle breakthrough while maintaining effective adsorption capabilities.

Inventive Principle:

Principle #35Parameter changes

4Object-affected harmful factors

If conventional filters are used to remove constituents, then some harmful substances are reduced, but humidity regulation is not effectively maintained

Engineering Contradiction:

Improveremoval of harmful constituentsVSAvoidhumidity regulation

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The invention applies multi-functionality to the amorphous magnesium carbonate material, which simultaneously performs constituent adsorption and humidity regulation. This single material addresses multiple filter functions, eliminating the need for separate humidity control mechanisms while maintaining effective harmful constituent removal.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The amorphous magnesium carbonate filter effectively removes harmful constituents like formaldehyde and benzene, maintains moisture balance, and prevents particle breakthrough, enhancing the smoking experience by improving taste and reducing activated carbon usage.

Implementation Method 1

The amorphous magnesium carbonate material may selectively remove constituents from smoke or aerosol

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

The amorphous magnesium carbonate material may be hygroscopic

Methodology Applied

Scientific EffectHygroscopic absorption: Absorption (physical)

Data Source

PatentUS20190343175A1Smoking article filter with amorphous magnesium carbonate

Publication Date: 2019.11.14 PHILIP MORRIS PRODUCTS SA

AI summary

A filter for a smoking article includes filtration material and an amorphous magnesium carbonate material contained within the filtration material. A smoking article includes a smokable material and the filter downstream of the smokable material.