CA1181314A - Process for improving the fillability of tobaccos - Google Patents
Process for improving the fillability of tobaccosInfo
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- CA1181314A CA1181314A CA000402973A CA402973A CA1181314A CA 1181314 A CA1181314 A CA 1181314A CA 000402973 A CA000402973 A CA 000402973A CA 402973 A CA402973 A CA 402973A CA 1181314 A CA1181314 A CA 1181314A
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Abstract
PROCESS FOR TREATING TOBACCO TO
IMPROVE ITS FILLING CAPACITY
ABSTRACT OF THE DISCLOSURE
A process for treating tobacco to improve its filling capacity, comprises treating the tobacco with a gas under pressure and subsequently effecting heating after pressure relief. The tobacco is treated with nitrogen and/or argon at working pressures up to 1000 bar followed, after pressure relief, by brief thermal aftertreatment. The high pressure gas treatment with nitrogen is carried out at a minimum pressure of 150 bar and with argon at a minimum pressure of 50 bar. The thermal aftertreatment is carried out with water vapour as saturated steam and the tobacco is simultaneously thoroughly moistened and swollen while releasing conden-sation energy.
IMPROVE ITS FILLING CAPACITY
ABSTRACT OF THE DISCLOSURE
A process for treating tobacco to improve its filling capacity, comprises treating the tobacco with a gas under pressure and subsequently effecting heating after pressure relief. The tobacco is treated with nitrogen and/or argon at working pressures up to 1000 bar followed, after pressure relief, by brief thermal aftertreatment. The high pressure gas treatment with nitrogen is carried out at a minimum pressure of 150 bar and with argon at a minimum pressure of 50 bar. The thermal aftertreatment is carried out with water vapour as saturated steam and the tobacco is simultaneously thoroughly moistened and swollen while releasing conden-sation energy.
Description
~ he in~ention relates to ~ nethod for impro~in~ the fillin~ capacity of tobaccos by treatin~ the tobacco ~ith gases under pressure an~ subse~uent heatin~ after pressure relief, wherein the tobacco is treated with nitrogen and/or ar~on at worlcing pressures up to 1000 bar and, after pressure relief, is su~,jected to a brie~ thermal ftertreatment.
~ uch a method is k~o~n, for exa~ple, from DE-0~ 29 03 300 a~d differs fund~mentall~ from the tobacco swelling process which has long been known with i~pregnation of the tobacco with volatile organic compoun~s, dinitrogen mono:~ide, S02, ammonia and C02 or liquid C02 at low pressures and subs~quent rapi~ drying at tem~eratures of 150 to 200C and hi~her, durin,~ which the swelling is effected by the rapid high-te~erature dryin~ and the drivin~ out of the liguid impregnants.
With the old kno7~n method, aftar t~e rapid dryin~ at high te~peratures~ a swollen tobacco is obtained with a low hu~idity of about 1 to 3i`' which has to be brou~ht back to the u9ual ~oisture content of 1,~ to 15~ or ~ore for the further ~rocessin,~0 In order to ~void the reduction in filli~ ca~acit~ whic'~ occurs in this case, ~s well ~s an increased ~roportion of tobacco dust ~nd a tedious re-hu~idifyin~
for the so-called re-arran~e~ent of the ~obacco, according to the method of the D~-0~ 29 03 300q tobacco is subjected, possi~ly in a cascade-like ~anner in a pluralit~ of au~oclaves, ~.
on the one hand to a high-pressure gas treat~ent ~ith nitro~en or argon and in a furt~er step to a ther~al after-treatment. ;rhe high-pressure ~as treatment causes 'he tobacco to absorb ga~, durin~ which, as a result of the hi~h ~inal ?ressure, short ~ressure reduction ti~es and possibl~ moistenin~ of the tobacco before the treatment, the absorption of a sufficie~tly large amount of gas in the tobacco is caused. ~urin- the suhsequent thermal aftertreatment, the occluded gas expands as a result of the e-~termal supply of heat qnd produces an outwardly directed pressure and hence a swellin~ of t~e tobacco structure.
Hitherto the opinion has generally been held that the improvement in fill n~ capacity was the greater, the ~reater the amount o~ gas absorbed. Ln the case of a high-pressure treatment of the tobacco with nitrogen or argon accordin~ to ~E-OS 29 03 300, it was further assumed that the tobacco used shoul~ have a certain initial moistnoss because the opinion was held tnat a tobacco with a lower initial moistness could not swell sufficlently after this hi~h-pressure gas ~rocess wl~h nitro!~en or argon~
~ on.,equently, in this metho~., the tobacco was preferably additionally moistened before the hi~h~pressurQ gas treatment, while -the thermal a~tertreatment WAS effected either in drying ovens or by means Or a microwa~e or infrared heating, durin- which the to~acco was dried to a desired final water content.
~"
"~, Now with this know~ method, it was felt to be a disadvantage that a tobacco treated in such a manner ~re1uentl~ coheres after the high-~ressure gas treatDent, which could ~ake the swellin~ di~ficult durin~ the ther~al aftertreatment hitherto usu31.
It is therefore the object oi the present invention to pro~ose a power-sa~in~ method for the swelling of the tobacco and ~urthermore to improve the hi~h-pressure gas method according to the D~-OS ~ 03 300 in order to increase the fillin~ capacity of the tobacco and to carry out the further processin~ of the tobacco in a simpler ~anner.
Surprising, it has now been ~ound that better swelling effects are obtained, particularly at lower pressures, if the tobacco is subjected, arter the high~-pressure g~s treatment, to a subsequent ther~al aftert~eatment with saturated steam, the to~cco being simultaneously moistened t~roughly and swollen, while releasi~g condensation heat.
In order to so~ve the above problem, a method of the kind referred to ~t the be~innin~ is proposed ~hich is characterised in that the hi~.h-~ressure gas treatment is carried GUt with nitrogen at ~ mi~imum pressure of 150 bar and with ar~on at a minimum rreasure of 50 bar, and that the ther~al a tertrsat~ent is earried out with water ~apour as satu~ated steam an~ that the tobacso is simultaneoual~
moistened thorol~hl~ and swollen while releasin~ condensation enerÆ y.
It is true thal. a fu~ther ~ethod of CO2 treatment for the swellin~ of tob~.cco ià described in the 3_-0~ 29 12 322, wherein, in contrast to the previously known C02 method, wor~ is carried out not with liquid ~2 but with gaseous 52 at higher ~ressures. ~ere, too, the ther~al after-treat~ent for the swelling is effected under dr~ing conditions at te~eratures from 199 to 3?0C 7 durin~ which the tobacco is dried fron its initial moistness of 9 to 15;~ for eYam~le, with superheateA steam for exam~le, in a steam drier, to 3 moistness of ~bout 1.5 to 3d ~ and at the same ti3e is swollen.
In co~-trast to this, in the hi~h-pressure sas treat~ent process with nitro~en and/or ar~on accordin~ to the lnventio~, the swell ng of the tobacco treated with pressure ~as is carried out with saturated steam, usinS t~e cond~nsation energy released for the swellin~.
It is surprisin~ th~t ~ tobacco traated with ~ressure gas can be treated fo~ the swellin~ by means of ~ thermal aftertreatment 7 not in a dryin~ manner but on the contrary7 in a hu~idifyin~ mar,ner and a~ the same time achieves excellent improvements in filling capacity.
~ art from t is, with the ~ethod accordin~, to the Application, the ver~ ex~ensive or critical re-~oistenin~, which is r.ecessar~ for a swollen tobacco by the v02 method, is elimi~ateAd -ven lith the ~2 method ~ccordin~ to D~-OS 29 12 ~ 2, the tobacco swollen in ~ dryin manner and obtained with ~ moistness Or 1 to 3;~, ~ust be brou~ht back to the nor~al processin~ moist~ss. ~his is ~ssociated ~ith ~ si~niricant loss of fillin~ force, however, takes up to 2'l hours or more f~r ~he llnirorm ~djust~ent Or the re~uired hu~idit~ v~lue and in certain units wi~h f~rced air circulation can even lead to b]owing into flame unless the re-moisteninc~ of the tobacco is carried out with expe~sive ultrasonic a~omizin~ equip~ent~
,~ith the method accordin.~ to the ~prlication, on the other ~and, the hi,h-~ressure treated to~acco is obtained in a moistness corr~s~onding to the ~roc~ssin~ ~oistness, is then swollen in a moistening ~anner ~nd can a~terwards be dried to the processin~ moistness again in the usual manner without difficulty, Without wishin" to stipulate specific mechanics, it can be assu~ed that in the method according to the ap~lication, in comparison with the known method accordin;~ to the D -0~
29 03 300, the increased cooling to be observed in tobacco with a lo~er moistness possibly leads to the ocolusion of a larger amount of gas durin- the blowin,g of t' of the process gas. rhe supply of saturated steam releases considerably ~reater a~ounts of energ~ bv condensatio~ in com~arison with -the afte.rtreatment ~ethods of the l~o~n ~ethod and so leads to an increase in the cell wall elasticity and to a ~articularly abrupt increase in volu~e ~ith simultaneous thorou~h moistening~
~his leads to the fact, as a ~urt~er advantA~e of the method accordin~ to the invention, that the hi,h-~re~--ure gas treat3ent can be carried 011t at lower Dressures and leads to a ~reater ,ain in filling ca?acity.
It is furt~er advanta~eous, to carry out the ~ressure treatment ~t te~peratures l'ro~ 0 to 50C; ad~ittedly this does not have much influence on tre im~rovement in the swellin,~ effect, but at tem?eratures above 50C de~osits o~ su~stances contained in the tobacco occur in the pipelines and below 0C ici~g of the valves results, It is further advantageous to carr~7 out the steam treat~ent with a water vapour ~hich has a densit~ of 0.5 to 10 k~ ~20/m3, that is to sa~ a water var)our which, at te~peratures between a~out 100 ~nd 2?0CC is so ~reatly satura~ed with ~2C that when re~chin~ the tobacco it is ~resent in the form of a condensin~ or moisteninC saturated steam.
It is further ad~risable for t~e tobacco to be treated to have a moisture content of up to about 15;v because then the moistening saturated~steam treatment leads to an opti~u~
final moistness, Surprisin~ly, it was further fou~d that the tobacco can be provided, selectivel~- eitser ~efore the hi~h-pressure gas treat~ent or after the ther~al steam aftertreatment, with suitable flavourin~ a~ents without a loss of gain in fillin~ capacity.
Cne advanta~e of the method acco~ding to the invention, which is ver~ i~portant for the technical carryinæ out, is that t~.e tobacco used l~ith its nor~al ~oistness or processin~
moistness does not cohere durir~ the ~ressure relief after the hi~h-?ressure g~s tre3t~ent a~ can be further ?rocessed in a ~ rle ~nner. In addition, a senar~te moistenin~
of the tcbaceo is elim_nate~l in the r,resent method.
'L'he follo~in~ exa~les serve to exr,lain the in~ention f~rther, Example 1 Virginia Tobacco was treated with nitrogen in a conven-tional installation as described in the DE-OS 29 03 300 but instead of -the double-autoclave connected in cascade, a reactor was used, -the working- or jacket temperature of which was kept at about 40C. The weighed amount of tobacco amounted to 200 g in each case. The treatment was affected at the pressures and tobacco moistnesses given in the fol-lowing Table I and with pressure reduction times of ahout 1.3 to 2 minutes. Then the tobacco thus treated was immedi-ately subjected to a thermal aftertreatment lasting about one minute, in that -the tobacco was treated on the one hand with saturated steam at 100C according to the invention and on the other hand with microwaves or in a drying oven as usual for comparison.
During the thermal aftertreatment of the tobacco impregnated with saturated steam, the tobacco present after the high-pressure gas treatment was spread out to form a fleece, immediately after the decompression, and this was conveyed at a constant speed under a steam nozzle. The samples treated with saturated steam were then dried with hot air to the required moistness.
The samples were then air-conditioned for about 36 hours under standard conditions of 21C and a relative humidity of 60%. The improvement in the filling capacity of the samples in comparison with an untreated sample was determined with a Borgwaldt densimeter after adjusting the equilibrium moist-ness.
_able 1 ~ftertreat~ent Final ~obacco ~mpro~e~ent in method ~ressure moistness ~illin~, capacity ~bar) ..... _ . .
Microwave 300 12.1,~ 20;~
22.3, 45;, 800 1~. 2,6 3 5;J
22 . 2io 70 Steam 300 12.0~ 57~
800 12.5~ 92,J
Exam~le ~
4 Vir~inia and a ~urlev t~hacco sRm~le were each treated similarly to ~xample 1. ''`he tob~cco moistness before t~e char-~in~ of the autoclave amounte~ to about 12,-o; the rin~l rressure was v~ried. 'he tobacco im~?re~n~ted with nitro~en was tr~ate~ wit~ saturated ste.~m at 10QC after.the ~ressure rel~ef. llh~ conditi.~ns Or t`ae .Ir~ividual ex~erl~ents ~n~
the improve~ents iD. fillin~ cap.~cit~ obtai.ned are asse~bled in ~ables IIa and IIb~
Table IIa (Virgini3 tobacco sample) est Pressure ~obacco -herma~ P-ocess I~mprovement No. (bar) moistness aftertreatment gas in lllling capacity (in co~.lparison ~ith com~3rison~
~ . c 1 1~0 1~.6 satu~ated steam I~ ~5
~ uch a method is k~o~n, for exa~ple, from DE-0~ 29 03 300 a~d differs fund~mentall~ from the tobacco swelling process which has long been known with i~pregnation of the tobacco with volatile organic compoun~s, dinitrogen mono:~ide, S02, ammonia and C02 or liquid C02 at low pressures and subs~quent rapi~ drying at tem~eratures of 150 to 200C and hi~her, durin,~ which the swelling is effected by the rapid high-te~erature dryin~ and the drivin~ out of the liguid impregnants.
With the old kno7~n method, aftar t~e rapid dryin~ at high te~peratures~ a swollen tobacco is obtained with a low hu~idity of about 1 to 3i`' which has to be brou~ht back to the u9ual ~oisture content of 1,~ to 15~ or ~ore for the further ~rocessin,~0 In order to ~void the reduction in filli~ ca~acit~ whic'~ occurs in this case, ~s well ~s an increased ~roportion of tobacco dust ~nd a tedious re-hu~idifyin~
for the so-called re-arran~e~ent of the ~obacco, according to the method of the D~-0~ 29 03 300q tobacco is subjected, possi~ly in a cascade-like ~anner in a pluralit~ of au~oclaves, ~.
on the one hand to a high-pressure gas treat~ent ~ith nitro~en or argon and in a furt~er step to a ther~al after-treatment. ;rhe high-pressure ~as treatment causes 'he tobacco to absorb ga~, durin~ which, as a result of the hi~h ~inal ?ressure, short ~ressure reduction ti~es and possibl~ moistenin~ of the tobacco before the treatment, the absorption of a sufficie~tly large amount of gas in the tobacco is caused. ~urin- the suhsequent thermal aftertreatment, the occluded gas expands as a result of the e-~termal supply of heat qnd produces an outwardly directed pressure and hence a swellin~ of t~e tobacco structure.
Hitherto the opinion has generally been held that the improvement in fill n~ capacity was the greater, the ~reater the amount o~ gas absorbed. Ln the case of a high-pressure treatment of the tobacco with nitrogen or argon accordin~ to ~E-OS 29 03 300, it was further assumed that the tobacco used shoul~ have a certain initial moistnoss because the opinion was held tnat a tobacco with a lower initial moistness could not swell sufficlently after this hi~h-pressure gas ~rocess wl~h nitro!~en or argon~
~ on.,equently, in this metho~., the tobacco was preferably additionally moistened before the hi~h~pressurQ gas treatment, while -the thermal a~tertreatment WAS effected either in drying ovens or by means Or a microwa~e or infrared heating, durin- which the to~acco was dried to a desired final water content.
~"
"~, Now with this know~ method, it was felt to be a disadvantage that a tobacco treated in such a manner ~re1uentl~ coheres after the high-~ressure gas treatDent, which could ~ake the swellin~ di~ficult durin~ the ther~al aftertreatment hitherto usu31.
It is therefore the object oi the present invention to pro~ose a power-sa~in~ method for the swelling of the tobacco and ~urthermore to improve the hi~h-pressure gas method according to the D~-OS ~ 03 300 in order to increase the fillin~ capacity of the tobacco and to carry out the further processin~ of the tobacco in a simpler ~anner.
Surprising, it has now been ~ound that better swelling effects are obtained, particularly at lower pressures, if the tobacco is subjected, arter the high~-pressure g~s treatment, to a subsequent ther~al aftert~eatment with saturated steam, the to~cco being simultaneously moistened t~roughly and swollen, while releasi~g condensation heat.
In order to so~ve the above problem, a method of the kind referred to ~t the be~innin~ is proposed ~hich is characterised in that the hi~.h-~ressure gas treatment is carried GUt with nitrogen at ~ mi~imum pressure of 150 bar and with ar~on at a minimum rreasure of 50 bar, and that the ther~al a tertrsat~ent is earried out with water ~apour as satu~ated steam an~ that the tobacso is simultaneoual~
moistened thorol~hl~ and swollen while releasin~ condensation enerÆ y.
It is true thal. a fu~ther ~ethod of CO2 treatment for the swellin~ of tob~.cco ià described in the 3_-0~ 29 12 322, wherein, in contrast to the previously known C02 method, wor~ is carried out not with liquid ~2 but with gaseous 52 at higher ~ressures. ~ere, too, the ther~al after-treat~ent for the swelling is effected under dr~ing conditions at te~eratures from 199 to 3?0C 7 durin~ which the tobacco is dried fron its initial moistness of 9 to 15;~ for eYam~le, with superheateA steam for exam~le, in a steam drier, to 3 moistness of ~bout 1.5 to 3d ~ and at the same ti3e is swollen.
In co~-trast to this, in the hi~h-pressure sas treat~ent process with nitro~en and/or ar~on accordin~ to the lnventio~, the swell ng of the tobacco treated with pressure ~as is carried out with saturated steam, usinS t~e cond~nsation energy released for the swellin~.
It is surprisin~ th~t ~ tobacco traated with ~ressure gas can be treated fo~ the swellin~ by means of ~ thermal aftertreatment 7 not in a dryin~ manner but on the contrary7 in a hu~idifyin~ mar,ner and a~ the same time achieves excellent improvements in filling capacity.
~ art from t is, with the ~ethod accordin~, to the Application, the ver~ ex~ensive or critical re-~oistenin~, which is r.ecessar~ for a swollen tobacco by the v02 method, is elimi~ateAd -ven lith the ~2 method ~ccordin~ to D~-OS 29 12 ~ 2, the tobacco swollen in ~ dryin manner and obtained with ~ moistness Or 1 to 3;~, ~ust be brou~ht back to the nor~al processin~ moist~ss. ~his is ~ssociated ~ith ~ si~niricant loss of fillin~ force, however, takes up to 2'l hours or more f~r ~he llnirorm ~djust~ent Or the re~uired hu~idit~ v~lue and in certain units wi~h f~rced air circulation can even lead to b]owing into flame unless the re-moisteninc~ of the tobacco is carried out with expe~sive ultrasonic a~omizin~ equip~ent~
,~ith the method accordin.~ to the ~prlication, on the other ~and, the hi,h-~ressure treated to~acco is obtained in a moistness corr~s~onding to the ~roc~ssin~ ~oistness, is then swollen in a moistening ~anner ~nd can a~terwards be dried to the processin~ moistness again in the usual manner without difficulty, Without wishin" to stipulate specific mechanics, it can be assu~ed that in the method according to the ap~lication, in comparison with the known method accordin;~ to the D -0~
29 03 300, the increased cooling to be observed in tobacco with a lo~er moistness possibly leads to the ocolusion of a larger amount of gas durin- the blowin,g of t' of the process gas. rhe supply of saturated steam releases considerably ~reater a~ounts of energ~ bv condensatio~ in com~arison with -the afte.rtreatment ~ethods of the l~o~n ~ethod and so leads to an increase in the cell wall elasticity and to a ~articularly abrupt increase in volu~e ~ith simultaneous thorou~h moistening~
~his leads to the fact, as a ~urt~er advantA~e of the method accordin~ to the invention, that the hi,h-~re~--ure gas treat3ent can be carried 011t at lower Dressures and leads to a ~reater ,ain in filling ca?acity.
It is furt~er advanta~eous, to carry out the ~ressure treatment ~t te~peratures l'ro~ 0 to 50C; ad~ittedly this does not have much influence on tre im~rovement in the swellin,~ effect, but at tem?eratures above 50C de~osits o~ su~stances contained in the tobacco occur in the pipelines and below 0C ici~g of the valves results, It is further advantageous to carr~7 out the steam treat~ent with a water vapour ~hich has a densit~ of 0.5 to 10 k~ ~20/m3, that is to sa~ a water var)our which, at te~peratures between a~out 100 ~nd 2?0CC is so ~reatly satura~ed with ~2C that when re~chin~ the tobacco it is ~resent in the form of a condensin~ or moisteninC saturated steam.
It is further ad~risable for t~e tobacco to be treated to have a moisture content of up to about 15;v because then the moistening saturated~steam treatment leads to an opti~u~
final moistness, Surprisin~ly, it was further fou~d that the tobacco can be provided, selectivel~- eitser ~efore the hi~h-pressure gas treat~ent or after the ther~al steam aftertreatment, with suitable flavourin~ a~ents without a loss of gain in fillin~ capacity.
Cne advanta~e of the method acco~ding to the invention, which is ver~ i~portant for the technical carryinæ out, is that t~.e tobacco used l~ith its nor~al ~oistness or processin~
moistness does not cohere durir~ the ~ressure relief after the hi~h-?ressure g~s tre3t~ent a~ can be further ?rocessed in a ~ rle ~nner. In addition, a senar~te moistenin~
of the tcbaceo is elim_nate~l in the r,resent method.
'L'he follo~in~ exa~les serve to exr,lain the in~ention f~rther, Example 1 Virginia Tobacco was treated with nitrogen in a conven-tional installation as described in the DE-OS 29 03 300 but instead of -the double-autoclave connected in cascade, a reactor was used, -the working- or jacket temperature of which was kept at about 40C. The weighed amount of tobacco amounted to 200 g in each case. The treatment was affected at the pressures and tobacco moistnesses given in the fol-lowing Table I and with pressure reduction times of ahout 1.3 to 2 minutes. Then the tobacco thus treated was immedi-ately subjected to a thermal aftertreatment lasting about one minute, in that -the tobacco was treated on the one hand with saturated steam at 100C according to the invention and on the other hand with microwaves or in a drying oven as usual for comparison.
During the thermal aftertreatment of the tobacco impregnated with saturated steam, the tobacco present after the high-pressure gas treatment was spread out to form a fleece, immediately after the decompression, and this was conveyed at a constant speed under a steam nozzle. The samples treated with saturated steam were then dried with hot air to the required moistness.
The samples were then air-conditioned for about 36 hours under standard conditions of 21C and a relative humidity of 60%. The improvement in the filling capacity of the samples in comparison with an untreated sample was determined with a Borgwaldt densimeter after adjusting the equilibrium moist-ness.
_able 1 ~ftertreat~ent Final ~obacco ~mpro~e~ent in method ~ressure moistness ~illin~, capacity ~bar) ..... _ . .
Microwave 300 12.1,~ 20;~
22.3, 45;, 800 1~. 2,6 3 5;J
22 . 2io 70 Steam 300 12.0~ 57~
800 12.5~ 92,J
Exam~le ~
4 Vir~inia and a ~urlev t~hacco sRm~le were each treated similarly to ~xample 1. ''`he tob~cco moistness before t~e char-~in~ of the autoclave amounte~ to about 12,-o; the rin~l rressure was v~ried. 'he tobacco im~?re~n~ted with nitro~en was tr~ate~ wit~ saturated ste.~m at 10QC after.the ~ressure rel~ef. llh~ conditi.~ns Or t`ae .Ir~ividual ex~erl~ents ~n~
the improve~ents iD. fillin~ cap.~cit~ obtai.ned are asse~bled in ~ables IIa and IIb~
Table IIa (Virgini3 tobacco sample) est Pressure ~obacco -herma~ P-ocess I~mprovement No. (bar) moistness aftertreatment gas in lllling capacity (in co~.lparison ~ith com~3rison~
~ . c 1 1~0 1~.6 satu~ated steam I~ ~5
2 300 11.7 satur3ted steam ~1~ 64
3 ~00 1.2~9 saturated steam N~ 102,~
.. ~ . . .. ~
,~;, .a~
lable_IIb (3urley tobacco sa~le) ~ . . .
Test Pressure ~obacco "herm~ P.ocess Improve-No (bar) moistness al~tertreat~ent ~as ment in (,~) fillin~
ca~acit~
( in com~ari.
oomparison 1 1~0 1~0 saturated steam ~i~ 40 2 300 12.1 satllrated steam N~ 6 3 ~00 11.5 saturated .~te~m ~2 85 xam~le_3 Wor~ was carried out as in _xamrle 2 but ar~on was used instead of nltrogen as a ~rocess ~as. l'he results are assembled in Tables IIIa and IIIb.
Table IIIa (vir~,inia tobacco) . ~ ~
~est Pressure nobacco ~l~ermal ~rocess Improvement in No (bar) moistness treat~ent gas fillin~ capacit ;~ (compared with co3parison) 1 50 12l8 saturated steam ar~on 38~
2 150 13.1 saturated steam argon 59,o 3 300 12.2 saturated steaD argon ~OiO
Table ~Ib(3urle~ tobacco) Test ~ressure ~obacco Thernal Process I~rovement ~o, (b~r) moistness treatment ~3S in fillin~
ca~acity (com~ared with 1 r~o ~ satur?ted ste~ ar~on 31,`o 2 1~0 12.2 satllrated steam ar~ron ~,o 3 300 1~ satu.. ated steam hr~on ~9;o .
,,,.~
,~
.. ~ . . .. ~
,~;, .a~
lable_IIb (3urley tobacco sa~le) ~ . . .
Test Pressure ~obacco "herm~ P.ocess Improve-No (bar) moistness al~tertreat~ent ~as ment in (,~) fillin~
ca~acit~
( in com~ari.
oomparison 1 1~0 1~0 saturated steam ~i~ 40 2 300 12.1 satllrated steam N~ 6 3 ~00 11.5 saturated .~te~m ~2 85 xam~le_3 Wor~ was carried out as in _xamrle 2 but ar~on was used instead of nltrogen as a ~rocess ~as. l'he results are assembled in Tables IIIa and IIIb.
Table IIIa (vir~,inia tobacco) . ~ ~
~est Pressure nobacco ~l~ermal ~rocess Improvement in No (bar) moistness treat~ent gas fillin~ capacit ;~ (compared with co3parison) 1 50 12l8 saturated steam ar~on 38~
2 150 13.1 saturated steam argon 59,o 3 300 12.2 saturated steaD argon ~OiO
Table ~Ib(3urle~ tobacco) Test ~ressure ~obacco Thernal Process I~rovement ~o, (b~r) moistness treatment ~3S in fillin~
ca~acity (com~ared with 1 r~o ~ satur?ted ste~ ar~on 31,`o 2 1~0 12.2 satllrated steam ar~ron ~,o 3 300 1~ satu.. ated steam hr~on ~9;o .
,,,.~
,~
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of improving the filling capacity of tobaccos by treating the tobacco with gas under pressure and subsequent heating after pressure relief, wherein the tobacco is treated with nitrogen and/or argon at working pressures up to 1000 bar and, after pressure relief, is subjected to a brief thermal aftertreatment, characterised in that the high-pressure gas treatment with nitrogen is carried out at a minimum pressure of 150 bar and with argon at a minimum pressure of 50 bar and that the thermal after-treatment is carried out with water vapour as saturated steam, and that the tobacco is simultaneously thoroughly moistened and swollen while releasing condensation energy.
2. A method as claimed in Claim 1, characterised in that the pressure treatment is carried out at working temperatures from 0 to 50°C.
3. A method as claimed in Claims 1 and 2, characterised in that the tobacco to be treated has a moisture content of up to about 15%.
4. A method as claimed in claim 1 or 2 characterised in that the steam treatment is effected with a water vapour having a density of 0.5 to 10 kg/m3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000402973A CA1181314A (en) | 1982-05-14 | 1982-05-14 | Process for improving the fillability of tobaccos |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000402973A CA1181314A (en) | 1982-05-14 | 1982-05-14 | Process for improving the fillability of tobaccos |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1181314A true CA1181314A (en) | 1985-01-22 |
Family
ID=4122777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000402973A Expired CA1181314A (en) | 1982-05-14 | 1982-05-14 | Process for improving the fillability of tobaccos |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1181314A (en) |
-
1982
- 1982-05-14 CA CA000402973A patent/CA1181314A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |