FR2718978A1 - Microgranular adsorbent and absorbent composition for ashtrays and process for its preparation. - Google Patents

Abstract

Adsorbent and absorbent microgranulated composition for extinguishing cigarettes, of the type having a microgranulated silica-based constituent and an additional constituent containing at least one substance effective in retaining the molecules of tobacco odours. The composition of the invention is characterized in that it consists of a mixture of said microgranule-based constituent selected for its properties of retention, through gas adsorption, of the molecules of tobacco odours on the cavity walls of said microporous-based constituent. The additional constituent which is also microgranulated, is selected for its properties of retention, through gas absorption by molecular inclusion, of tobacco odours in the cavities of the molecules of said additional constituent.

Description

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  ADSORBENT AND ABSORBENT MICROGRANULATED COMPOSITION

  FOR ASHTRAYS AND PROCESS FOR ITS PREPARATION

  The invention relates to a microgranular composition, for use in ashtrays, capable of quenching incandescent parts almost instantly.

  cigarettes and reduce, if not eliminate, the odors they emit

  this being extinguished (smoke) and once extinguished (cold tobacco).

  The known compositions of the genre in question are essentially described in the patents: - FR-2429822 which relates to a deodorant composition, for ashtrays,

  able to spread vapors intended to treat air from the surrounding atmosphere

  ronnante. It includes an absorbent granular substance and an essential oil.

  absorbed tielle acting as a mask of odors. The process involves pul-

  check the deodorant essences on the entire mass of the

  Basic tance placed in a mixer.

  - EP-250304 which relates to a pulverulent composition, for use ashtrays, comprising a pulverulent mass consisting of silica which is impregnated with at least one odor absorbing product (of the ricinoleate type) and, in addition, a perfume and / or a dye. The process involves spraying a solution on

  all of the pulverulent mass heated (to around 200 ° C.) and stirred.

  These two types of composition have the following particular disadvantages:

  vants: a) the additional constituent is involved in large proportions in the final composition which has the effect of significantly increasing

  the cost price and decrease, also significantly, the power

  see adsorption of silica gases (porous structure); b) the basic microgranular constituent, which contains more than 90% of silica

  (Si02), is used for its properties of absorption of liquids and not of ad-

  sorption of gases: in fact it serves as a physical support for the additive constituent

  tional (spray solution) which has deodorant properties; c) the density of such a composition is greater than 1.6 Kg / dm '

  which has the effect, for a given volume, of increasing the cost of the composition

  location and the share of costs of packaging and transport; d) the additional odorant component mixes strongly with the tobacco smell giving an unpleasant result; e) the additives used, based on essential oils, which are used in large quantities, have the effect of greasing the grains (reduction in the flowable property) and the ashtrays (soiling); -2-

  f) the preparation processes are expensive (high cost of the final product).

  The invention therefore aims to produce a composition which decreases so

  important, even eliminates, these various drawbacks.

  To this end, it relates to a composition of which: a) the basic constituent has been chosen for: - its ability to extinguish cigarettes by suffocation (by its structure and its particle size);

  - its ability to adsorb, by physicochemical surface reaction, the molecules

  gas cules (due to its specific porous structure); - its low density (reduction of the cost of raw material, packaging and transport); b) the additional constituent has been chosen for: - its ability to absorb, by molecular inclusion, the specific odors of tobacco (in addition to the gas adsorption power of the basic constituent); - its intervention in low proportions by weight (economy); - its independence from the basic constituent, the intrinsic properties of which it does not alter (possibly over a small proportion of its mass).

  In other words, the composition according to the invention combines the adsorption actions

  molecular tion of gases (including tobacco odors) from the basic constituent and molecular absorption of specific tobacco odors from the additional constituent. The research undertaken consisted in: a) eliminating, as basic constituent, the siliceous sands which comprise more than 90% of silica and which have a density, once impregnated and dried, greater than 1.6 Kg / dm '; b) eliminating, as an additional constituent, the deodorant solutions sprayed and absorbed by the mass of the basic constituent; c) to eliminate the solutions which consist in treating the air and not in retaining,

  in the mass contained in the ashtray, the smell of tobacco.

  The basic constituent, chosen for its molecular adsorption properties of gases (and in particular tobacco odors), is of the natural clay type

  who has undergone a calcination operation.

  The additional constituent, chosen for its molecular absorption properties

  smells of specific tobacco, is of the type belonging to the family

cyclodextrin compounds.

  -3- The additional constituent is either sprayed or mixed, or one and

aure, to the basic constituent.

  The characteristics and advantages of the invention will appear

  more clearly on reading the following detailed description of modes

  preferred embodiments of the invention given by way of nonlimiting examples. The adsorbent and absorbent microgranular composition of tobacco odors comprises:

  - a basic microgranular constituent, chosen for its adsorptive properties -

  molecular tion of gases, of the natural clay type which has undergone a calcination operation and which contains, with respect to its total weight, from 40 to 80% of SiO2 and from 10 to 30% of a mixture of metal oxides comprising A1203 , Fe203, CaO and MgO; - an additional constituent containing at least one substance, chosen for its molecular absorption properties by inclusion of specific tobacco odors, of the type belonging to the family of cyclodextrin compounds,

  which comes to combine with the action of the basic constituent.

  The clay used is advantageously attapulgite which has a high

  adsorption power of gases and in particular tobacco odors.

  Said power is increased by more than 50% by a calcination operation (adsorption is done by physicochemical reaction on the surface of the walls

cavities).

  The substance capable of capturing tobacco odors by molecular inclusion is

  advantageously betacyclodextrin which is a compound of cyclodextrins.

  Said product is produced industrially from starch.

  It also has the property of filtering out nicotines and tars.

  The additional constituent may contain, in addition, an odor masking

  tobacco based on essential oils.

  The composition obtained has a density between 0.5 and

0.75 Kg / dm '.

  The particle size of the clay used is between 0.1 and 1 mm.

  The process for preparing the composition according to the invention consists of: a) calcining, in a thermal enclosure, at a temperature for example between 600 and 900 ° C., the basic microgranulated constituent; b) adding, to said calcined base constituent, the additional constituent

  so as to obtain a homogeneous mixture between the two said constituents.

  The additional constituent may be obtained by spraying the substance retaining the odors of tobacco on a microgranular base, of the same nature or of a different nature from that of the microgranulated base constituent,

  then mixed, by mixing with the latter.

  The additional constituent, which is for example directly the substance

  retaining the odors of tobacco and which then comes in the micro-

  granulated, is mixed, by stirring, with the microgranulated base constituent.

  The tobacco odor-retaining substance can be advantageously micro-

  sprayed directly on 5 to 30% of the total mass of the constituent of

  microgranular base resulting from phase a) above, said pulverulent mass

  then being mixed, by stirring, with 95 to 70% of the mass of the

  basic killing not having undergone the micropulverization operation.

  The substance retaining the odors of tobacco can intervene advantageously

  in proportions of between 0.2 and 10% of the total weight of the compound

  sition. An accelerated drying cycle can eventually complete the above process.

  mentioned if the moisture content of the composition is more than 10%. A colorant can also be added to the final composition. In the composition thus produced, although the adsorption functions

  and absorption of tobacco odors are carried out from two consti-

  separate kills, they cooperate in a new overall result

and original in its effectiveness.

  In addition, the casting characteristics of the basic component, which

  titues the main mass of the composition, is practically unchanged

  by the additional constituent, which is not the case for the sprayed products

  rulents undergoing a cycle of impregnation of filler solutions on the total

lity of their mass.

  Want to act directly on the basic constituent by solutions of

  deodorant and possibly colored products, decreases significantly

  aunt the adsorbent properties of the products in question. In addition, they

  treat the ambient air more than the cigarette butt in the ashtray.

  The results obtained by this composition by its action on butts are much higher than those obtained with the compositions belonging to

  the above-mentioned state of the art.

  The composition thus obtained is easy to prepare and to package.

  It makes it possible to work at high frequencies of manufacturing and obtaining

  relatively low costs compatible with the application in question.

  -5- Such a product, intended for domestic ashtrays and cars, must be above all economical and effective. Of course, the invention is not limited to the embodiments described for which other variants can be provided: - in the clays used; - in the additional constituents used belonging to the same families;

  - in the proportions existing between the different constituents; without departing from the scope of the invention.

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Claims (8)

  1- Microgranular composition, for use in ashtrays, capable of almost immediately extinguishing the incandescent parts of cigarettes and reducing, even eliminating, the odors given off by them being extinguished (smoke) and once extinguished (cold tobacco); characterized in that it comprises a basic microgranulated constituent, chosen for its molecular adsorption properties of gases, of the clay type   natural which has undergone a calcination operation and which contains, by comparison   weight at its total weight, from 40 to 80% of SiO2 and from 10 to 30% of a mixture of metal oxides comprising A1203, Fe203, CaO and MgO, and an additional constituent containing at least one substance, chosen for its properties molecular absorption by inclusion of specific tobacco odors, of the type belonging to the family of cyclodextrin compounds, which comes   combine with the action of the basic constituent.   2- Composition according to claim 1, characterized in that the ar-   gile used is attapulgite.   3- Composition according to claim 1, characterized in that the   substance operating molecular absorption by inclusion is beta- cyclodextrin.   4- Composition according to any one of the preceding claims,   characterized in that the additional constituent contains, in addition, a masker of tobacco odors based on natural or synthetic essential oils.   - Composition according to any one of the preceding claims,   characterized in that the final composition obtained has a density   mique between 0.5 and 0.75 Kg / dm '.   6- Process for preparing the composition according to any one of   previous claims, characterized in that it consists:   a) calcining, in a thermal enclosure, the basic constituent micro-   granule; b) adding, to said calcined base constituent, the additional constituent   so as to obtain a homogeneous mixture between the two said constituents.   7- A method according to claim 6, characterized in that the component   additional killing is obtained by spraying the substance retaining the   tobacco odors on a microgranular basis, of the same or different nature   similar to that of the basic microgranular constituent, to then be   mixed, by mixing, with the latter. -7-   8- A method according to claim 6, characterized in that the component   additional killing, which is directly the odor-retaining substance of   tobacco and which is in the microgranular form, is mixed, by arms-   wise, with a basic microgranular constituent.   9- Method according to claim 6, characterized in that the substance retaining the odors of tobacco is advantageously micropulverized directly   on 5 to 30% of the total mass of the microgranular base constituent resulting from phase a) above, said pulverized mass then being mixed, by stirring, with 95 to 70% of the mass of the basic constituent which has not undergone micropulverization operation.   - Method according to any one of claims 6 to 9, characterized in that the substance retaining the odors of tobacco intervenes advantageously   in proportions of between 0.2 and 10% of the total weight of the composition.