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Nuevo filtro para eliminar alquitrán, nicotina y compuestos tóxicos en el humo del tabaco


Oferta Tecnológica
Una universidad española ha desarrollado un nuevo filtro combinado que elimina el alquitrán, nicotina y otros gases tóxicos del humo del tabaco de forma más eficiente que los filtros actualmente disponibles en el mercado. Este nuevo filtro combina tres membranas de diferentes características colocadas de forma muy específica. El filtro consta de una membrana primaria semipermeable o permeable de forma circular o cilíndrica ubicada inmediatamente después de la columna de tabaco que incorpora sabores u otros aditivos, una membrana intermedia situada entre la membrana primaria y externa con forma cilíndrica y formada por un material adsorbente, y una membrana externa situada en contacto con la boca del fumador, de forma cilíndrica y compuesta por una fibra de acetato de celulosa. Con un bajo coste de fabricación, este filtro puede aplicarse tanto en cigarrillos comerciales como en filtros de tabaco de liar. La universidad busca compañías del sector de tabaco interesadas en establecer acuerdos de licencia o cooperación técnica.


New filter for removing tar, nicotine and toxic compounds from tobacco smoke
A Spanish university has developed a new combined filter that eliminates tar, nicotine and other toxic gases in tobacco smoke more efficiently than current filters available in the market. This new filter combines three membranes of different characteristics arranged in a very specific way. With a low manufacturing cost it can be applied in both commercial cigarettes and filters for rolling tobacco. Tobacco sector companies interested in licensing or technical cooperation agreements are sought.
Tobacco use represents a major public health problem worldwide. More than 6,000 compounds have been identified in tobacco smoke, around 100 of which are recognized as toxic or carcinogenic by the Food and Drug Administration (FDA).

Cigarettes are basically constituted by a paper cylinder, the tobacco mixture and the filter. As for the filters, different configurations have been used (multiple filters, concentric cylinders, helical grooves, etc.) in which active substances (cellulose acetate, activated carbons, zeolites, mesoporous solids, polar chemical components, liquid fatty acids, etc.) have been able to reduce the inhalation of toxic substances by smokers. However, the main problems of the current filters are the technical difficulties on their design and their high manufacturing costs. Unfortunately, this problem is still unresolved and new solutions must be developed.

A Spanish university has developed a new combined filter that includes up to three different types of membranes, each of them with specific characteristics, where the location of these ones is essential to achieve a significant improvement in the elimination of tars and toxic compounds in tobacco smoke. These filters can be used in any type of commercial cigarette, in the tubes to fill, and in filers for rolling tobacco.

This innovative combined filter comprises the following elements (see Figure 1):

1. Primary membrane (M1): it is a semipermeable or impermeable membrane, circular or cylindrical in shape (with a diameter equal to that of the tobacco column or the conventional filter), which must be placed immediately after the tobacco column and in contact with it. This membrane can incorporate tastes or flavors, or any other additive.

2. Intermediate membrane (M2): it is located between the primary membrane (M1) and the outer membrane (M3). It has a cylindrical shape and is formed by an adsorbent material. M2 acts on the gases generated by adsorbing certain harmful compounds, which significantly reduces its inhalation by the smoker. This type of membrane also allows the incorporation of tastes or flavors, being more effective for this purpose than M1.

3. External membrane (M3): this membrane is in contact with the smoker´s mouth (it is the classic filter). It is cylindrical and consists of cellulose acetate fiber. It can incorporate ducts of different sections, and it is likely to include capsules of flavors and other substances, either adsorbed or as a physical mixture.

This technology is useful for the tobacco industry. In particular, it can be used as a combined filter in any type of tobacco column, both in the variety of commercial cigarettes, cigars, cigarillos, unfiltered cigarettes, stuffed tubes and hand-rolled cigars.

Companies in the tobacco sector are sought for acquiring this technology for commercial exploitation through patent licensing agreements or technical cooperation for development of new applications.
Advantages and Innovations:
The most innovative aspect of this technology is the joint use of the membranes in the proper order, which allows obtaining an efficient condensation of toxic compounds, preventing them from being inhaled by the smoker. As a result, the end of the filter (M3) is clearly cleaner than with a conventional filter (see Figure 2).

This new combination of membranes provides the following advantages over the systems currently available in the market:

· It drastically reduces the inhalation of toxic compounds by the smoker (see Table 1).
· Greater effectiveness than current filters.
· Low manufacturing cost: less material is required to achieve greater filtering effectiveness.
· It allows dispensing different tastes or flavors to the smoker.
· Suction pressure is maintained at acceptable levels during smoking.
· It can be adapted in a simple way to any type of cigarette: both commercial (cigarettes, cigars, cigarillos, unfiltered cigarettes), and in rolling tobacco.
· Marketing versatility: the membranes can be manufactured separately and used directly by the consumer in rolling tobacco cigarettes, or already assembled in commercial filters.
· These types of solutions are in high demand by smokers.
Stage of Development:
Prototype available for demonstration
Patent(s) applied for but not yet granted
CommeR Statunts Regarding IPR Status:
The present invention is protected by a Spanish patent application.

Partner sought

Type and Role of Partner Sought:
- Type of partner sought: Companies

- Specific area of activity of the partner: Tobacco sector; Manufacturers of complete nozzles; Membrane manufacturers for filters; Manufacturers of tobacco and cigarettes; Smoking paper manufacturers; Smoking filter manufactures.

- Task to be performed: To acquire this technology for its commercial exploitation through patent licensing agreements or technical cooperation (e.g., Development of new applications; adaptation of specific needs, etc.).


Type and Size of Client:
Already Engaged in Trans-National Cooperation:
Languages Spoken:


Technology Keywords:
03004011 Care, Hygiene, Beauty
05004001 Procesos de filtración y con membranas