US3403689A - Paper filter of selective removal of a cigarette smoke vapor - Google Patents

Paper filter of selective removal of a cigarette smoke vapor Download PDF

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Publication number
US3403689A
US3403689A US462050A US46205065A US3403689A US 3403689 A US3403689 A US 3403689A US 462050 A US462050 A US 462050A US 46205065 A US46205065 A US 46205065A US 3403689 A US3403689 A US 3403689A
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US
United States
Prior art keywords
paper
filter
phosphite
hydrogen cyanide
paper filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US462050A
Inventor
Bobby J Sublett
Sloan Cephas Hiram
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US425920A priority Critical patent/US3417758A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US462050A priority patent/US3403689A/en
Priority claimed from US476660A external-priority patent/US3397705A/en
Priority to BE674968D priority patent/BE674968A/xx
Priority to FR45597A priority patent/FR1465842A/en
Priority to ES0321774A priority patent/ES321774A1/en
Priority to GB1803/66A priority patent/GB1085582A/en
Application granted granted Critical
Publication of US3403689A publication Critical patent/US3403689A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials

Definitions

  • This invention relates to filters that will remove hydrogen cyanide from smoke. More particularly it relates to paper filter elements containing additives which will effectively remove the hydrogen cyanide normally encountered in tobacco smoke.
  • One object of this invention is to provide a paper filter element that will remove a considerable amount of hydrogen cyanide from the vapor portion of tobacco smoke. Another object is to provide a method of increasing the filtration efiiciency of paper tobacco smoke filter elements. Further objects will appear hereinafter.
  • our invention involves applying to paper adapted for use in tobacco smoke filters a watersoluble inorganic salt of a Group Ia element.
  • Preferred salts are sodium phosphite, potassium phosphite, lithium phosphite, sodium carbonate, potassium carbonate and lithium carbonate.
  • the salts are preferably finely divided. The preferred particle size is such that the particles will pass through a lOO-mesh screen (US. Standard Sieve).
  • the water-soluble inorganic salt may be applied by sitting, dusting, shaking, or from a water solution or dispersion. It may also be applied by spraying or rolling on the tow. More than one salt may be used as a mixture if desired.
  • the paper to which the salt additives may be applied according to our invention is any paper suitable for making tobacco smoke filters.
  • the water-soluble inorganic salt may be applied to the paper in the amount of from 1 to 30% by Weight, the preferred amount being 2 to by weight of the filter element prepared from the paper.
  • the salt is enabled to take advantage of the large surface area which provides the contact necessary for hydrogen cyanide removal.
  • the paper is spread out to a width of 10-20 inches or so and sprayed with a water solution of the additive until 10 to 30% of the additive has been applied to the paper.
  • paper is then dried, compacted and wrapped, for example, with a paper tape, to form a rod. It may be cut into any desired length and used either alone as a filter or in combination with other filters to make a dual or multiple filter.
  • EXAMPLE I A 170-mm. length of cigarete filter paper weighing approximately 1 gram was spread out to a width of 15 inches and sprayed with a saturated solution of sodium ortho phosphite. The paper was allowed to dry and then reweighed. The paper containing the phosphite salt weighed 1.1 grams. The paper was then recompacted, wrapped with a paper tape to form a filter rod. The rod was cut into 17-m-m. segments which contained approximately 10 mg. of the phosphite salt. The 17-min. filter segments were attached to king-size cigarettes by means of a cellophane tape. The cigarettes were smoked with an automatic smoking device and the vapors which passed through the filter were collected and analyzed by spectrophotometry. The amount of hydrogen cyanide found was 50 pg. The amount of hydrogen cyanide found by analyzing a king-size cigarette with a similar paper filter, which was not treated with sodium phosphite, was 138 pg.
  • EXAMPLE II A paper napkin was moistened with a 30% potassium ortho phosphite solution and then dried. The dry napkin increased in weight by 15%. The napkin was compacted and wrapped with a paper tape to form a filter rod. The rod was out into 20-mm. segments and the segments attached to king-size cigarettes. The cigarettes were smoked on an automatic smoking device, and the vapors which passed through the filter were collected and analyzed for hydrogen cyanide by a spectrophotometric method. The vapors from a nonfilte'red king-size cigarette were collected, analyzed in the same manner, and the two analyses were compared. The nonfiltered cigarette delivered 151 jlg. of hydrogen cyanide; the cigarette containing the paper filter treated with potassium phosphite delivered only ,wg. of hydrogen cyanide.
  • a paper adapted for use in tobacco smoke filter elements of enhanced hydrogen cyanide removal capability comprising a tobacco smoke filter element grade paper containing deposited substantially uniformly throughout said paper about 10 to 30% by weight of said paper of a water-soluble inorganic salt selected from the group consisting of sodium orthophosphite or potassium orthophosp-hite.
  • a creped cellulose tobacco smoke filter element prepared from paper containing deposited substantially uniformly over the surface of the paper therein a watersoluble inorganic weak basic salt selected from the group of salts consisting of sodium phosphite, potassium phosphite and lithium phosphite, in an amount of 1 to 30 percent based on the weight of the filter element, said element being capable of selectively removing a substantial amount of hydrogen cyanide from tobacco smoke.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Paper (AREA)

Description

United States Patent 3,403,689 PAPER FILTER 0F SELECTIVE REMOVAL OF A CIGARETTE SMOKE VAPOR Bobby J. Snblett and Cephas Hiram Sloan, Kingsport,
Tenn., assignors to Eastman Kodak Company, Rochester, N .Y., a corporation of New Jersey No Drawing. Continuation-impart of application Ser. No. 425,920, Jan. 15, 1965. This application June 7, 1965, Ser. No. 462,050
3 Claims. (Cl. 131265) ABSTRACT OF THE DISCLOSURE A paper adapted for use in tobacco smoke filter elements capable of removing a substantial amount of hydrogen cyanide from tobacco smoke, the filter element containing deposited substantially uniformly throughout said paper a water soluble inorganic weak basic salt selected from the group of salts consisting of sodium phosphite, potasium phosphite and lithium phosphite.
This is a continuation-in-part of Serial No. 425,920 filed January 15, 1965.
This invention relates to filters that will remove hydrogen cyanide from smoke. More particularly it relates to paper filter elements containing additives which will effectively remove the hydrogen cyanide normally encountered in tobacco smoke.
In US. Patent 2,940,456 our co-worker Touey disclosed use of calcium and magnesium carbonates to remove particulate matter commonly referred to as tars. Since issuance of said patent a need has developed for removal from tobacco smoke of certain other substances not removable by said carbon-ates. Such substances include hydrogen cyanide. After extended investigation we have found a group of additives that will remove hydrogen cyanide from tobacco smoke when applied to paper used in tobacco smoke filters.
One object of this invention is to provide a paper filter element that will remove a considerable amount of hydrogen cyanide from the vapor portion of tobacco smoke. Another object is to provide a method of increasing the filtration efiiciency of paper tobacco smoke filter elements. Further objects will appear hereinafter.
In its broader aspects our invention involves applying to paper adapted for use in tobacco smoke filters a watersoluble inorganic salt of a Group Ia element. Preferred salts are sodium phosphite, potassium phosphite, lithium phosphite, sodium carbonate, potassium carbonate and lithium carbonate. The salts are preferably finely divided. The preferred particle size is such that the particles will pass through a lOO-mesh screen (US. Standard Sieve). The water-soluble inorganic salt may be applied by sitting, dusting, shaking, or from a water solution or dispersion. It may also be applied by spraying or rolling on the tow. More than one salt may be used as a mixture if desired.
The paper to which the salt additives may be applied according to our invention is any paper suitable for making tobacco smoke filters.
The water-soluble inorganic salt may be applied to the paper in the amount of from 1 to 30% by Weight, the preferred amount being 2 to by weight of the filter element prepared from the paper. By uniform application to the surface of the paper the salt is enabled to take advantage of the large surface area which provides the contact necessary for hydrogen cyanide removal.
According to one embodiment of our invention the paper is spread out to a width of 10-20 inches or so and sprayed with a water solution of the additive until 10 to 30% of the additive has been applied to the paper. The
paper is then dried, compacted and wrapped, for example, with a paper tape, to form a rod. It may be cut into any desired length and used either alone as a filter or in combination with other filters to make a dual or multiple filter.
The following examples are illustrative of our invention.
EXAMPLE I A 170-mm. length of cigarete filter paper weighing approximately 1 gram was spread out to a width of 15 inches and sprayed with a saturated solution of sodium ortho phosphite. The paper was allowed to dry and then reweighed. The paper containing the phosphite salt weighed 1.1 grams. The paper was then recompacted, wrapped with a paper tape to form a filter rod. The rod was cut into 17-m-m. segments which contained approximately 10 mg. of the phosphite salt. The 17-min. filter segments were attached to king-size cigarettes by means of a cellophane tape. The cigarettes were smoked with an automatic smoking device and the vapors which passed through the filter were collected and analyzed by spectrophotometry. The amount of hydrogen cyanide found was 50 pg. The amount of hydrogen cyanide found by analyzing a king-size cigarette with a similar paper filter, which was not treated with sodium phosphite, was 138 pg.
EXAMPLE II A paper napkin was moistened with a 30% potassium ortho phosphite solution and then dried. The dry napkin increased in weight by 15%. The napkin was compacted and wrapped with a paper tape to form a filter rod. The rod was out into 20-mm. segments and the segments attached to king-size cigarettes. The cigarettes were smoked on an automatic smoking device, and the vapors which passed through the filter were collected and analyzed for hydrogen cyanide by a spectrophotometric method. The vapors from a nonfilte'red king-size cigarette were collected, analyzed in the same manner, and the two analyses were compared. The nonfiltered cigarette delivered 151 jlg. of hydrogen cyanide; the cigarette containing the paper filter treated with potassium phosphite delivered only ,wg. of hydrogen cyanide.
From the preceding description and examples it may be seen that we have provided a paper filter element containing a water-soluble inorganic salt for improving cyanide removal.
We claim:
1. A paper adapted for use in tobacco smoke filter elements of enhanced hydrogen cyanide removal capability comprising a tobacco smoke filter element grade paper containing deposited substantially uniformly throughout said paper about 10 to 30% by weight of said paper of a water-soluble inorganic salt selected from the group consisting of sodium orthophosphite or potassium orthophosp-hite.
2. A creped cellulose tobacco smoke filter element prepared from paper containing deposited substantially uniformly over the surface of the paper therein a watersoluble inorganic weak basic salt selected from the group of salts consisting of sodium phosphite, potassium phosphite and lithium phosphite, in an amount of 1 to 30 percent based on the weight of the filter element, said element being capable of selectively removing a substantial amount of hydrogen cyanide from tobacco smoke.
3. A creped cellulose filter element according to claim 2 wherein the amount of the water soluble, inorganic, weak basic salt deposited substantially throughout the filter element is 2-10% based on the weight of the filter element.
(References on following page) 3 References Cited UNITED STATES PATENTS 760,772 11/1956 Great Britain.
2,172,946 9/1939 Sutter 131-265 I 2 76 13 10 1 5 Hiler 5 X 5 SAMUEL KOREN: Primary Exammel- 3,019,764 2/1962 Whitmore fit a1 131-266 D. J. DONOHUE, Assistant Examiner.
FOREIGN PATENTS
US462050A 1965-01-15 1965-06-07 Paper filter of selective removal of a cigarette smoke vapor Expired - Lifetime US3403689A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US425920A US3417758A (en) 1965-01-15 1965-01-15 Filter elements and additives therefor
US462050A US3403689A (en) 1965-01-15 1965-06-07 Paper filter of selective removal of a cigarette smoke vapor
BE674968D BE674968A (en) 1965-01-15 1966-01-11
FR45597A FR1465842A (en) 1965-01-15 1966-01-12 Tobacco smoke filters retaining hydrocyanic acid
ES0321774A ES321774A1 (en) 1965-01-15 1966-01-14 Improvements introduced in the manufacture of a fibrous product, for filters of cigarettes. (Machine-translation by Google Translate, not legally binding)
GB1803/66A GB1085582A (en) 1965-01-15 1966-01-14 Tobacco smoke filters and materials therefor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US425920A US3417758A (en) 1965-01-15 1965-01-15 Filter elements and additives therefor
US462050A US3403689A (en) 1965-01-15 1965-06-07 Paper filter of selective removal of a cigarette smoke vapor
US476660A US3397705A (en) 1965-08-02 1965-08-02 Filter elements and additive containing material therefor

Publications (1)

Publication Number Publication Date
US3403689A true US3403689A (en) 1968-10-01

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Family Applications (2)

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US425920A Expired - Lifetime US3417758A (en) 1965-01-15 1965-01-15 Filter elements and additives therefor
US462050A Expired - Lifetime US3403689A (en) 1965-01-15 1965-06-07 Paper filter of selective removal of a cigarette smoke vapor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US425920A Expired - Lifetime US3417758A (en) 1965-01-15 1965-01-15 Filter elements and additives therefor

Country Status (5)

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US (2) US3417758A (en)
BE (1) BE674968A (en)
ES (1) ES321774A1 (en)
FR (1) FR1465842A (en)
GB (1) GB1085582A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070056600A1 (en) * 2005-09-14 2007-03-15 R. J. Reynolds Tobacco Company Filtered smoking article
US9491971B2 (en) 2005-12-13 2016-11-15 Philip Morris Usa Inc. Specifically-defined smoking article with activated carbon sorbent and sodium bicarbonate-treated fibers and method of treating mainstream smoke
CN111557467A (en) * 2020-05-13 2020-08-21 四川中烟工业有限责任公司 Preparation method of cyan cigar wrapper tobacco leaves
CN112523003A (en) * 2020-12-03 2021-03-19 中国制浆造纸研究院有限公司 Preparation method of hard groove paper for cigarette filter stick

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763674A (en) * 1986-04-16 1988-08-16 Hercules Incorporated Method and device for controlling hydrogen cyanide and nitric oxide concentrations in cigarette smoke
US5150723A (en) * 1988-09-28 1992-09-29 Eastman Kodak Company Process for the production of tobacco smoke filters
US4964426A (en) * 1988-09-28 1990-10-23 Eastman Kodak Company Tobacco smoke filters and process for production thereof
US5150721A (en) * 1990-02-28 1992-09-29 Lee Benedict M Tobacco smoke filter material and process for production thereof
US5141006A (en) * 1990-02-28 1992-08-25 Eastman Kodak Company Tobacco smoke filter material and process for production thereof
US5911224A (en) * 1997-05-01 1999-06-15 Filtrona International Limited Biodegradable polyvinyl alcohol tobacco smoke filters, tobacco smoke products incorporating such filters, and methods and apparatus for making same
ITVA20060056A1 (en) * 2006-09-06 2008-03-07 Giuseppe Elia FILTER TO REMOVE TOXIC TOBACCO SMOKE SUBSTANCES
CN105642240B (en) * 2014-11-10 2018-04-06 南通醋酸纤维有限公司 A kind of porous cellulose diacetate adsorbent and its preparation method and application

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2172946A (en) * 1935-09-04 1939-09-12 Roser B Sutter Tobacco smoke purifier
US2768913A (en) * 1954-10-22 1956-10-30 Ohio Commw Eng Co Cigarette filter tips from dextran
GB760772A (en) * 1954-12-28 1956-11-07 Frank Fessler Improvements in cigarettes and cigars
US3019764A (en) * 1958-03-06 1962-02-06 Schilling Electric Company Milk releaser with timer control

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT86246B (en) * 1919-02-20 1921-11-10 Ella Schlesinger Process for the manufacture of smoke cartridges.
US2832351A (en) * 1950-06-26 1958-04-29 Verdurin Company Method of treating tobacco smoke
LU38122A1 (en) * 1959-01-06
US3101723A (en) * 1960-11-15 1963-08-27 Philip Morris Inc Fibrous cigarette filter
GB997149A (en) * 1963-07-22 1965-07-07 British American Tobacco Co Improvements relating to cigarette filters
US3368566A (en) * 1964-06-17 1968-02-13 Souren Z. Avediklan Filter cigarette

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2172946A (en) * 1935-09-04 1939-09-12 Roser B Sutter Tobacco smoke purifier
US2768913A (en) * 1954-10-22 1956-10-30 Ohio Commw Eng Co Cigarette filter tips from dextran
GB760772A (en) * 1954-12-28 1956-11-07 Frank Fessler Improvements in cigarettes and cigars
US3019764A (en) * 1958-03-06 1962-02-06 Schilling Electric Company Milk releaser with timer control

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070056600A1 (en) * 2005-09-14 2007-03-15 R. J. Reynolds Tobacco Company Filtered smoking article
US9491971B2 (en) 2005-12-13 2016-11-15 Philip Morris Usa Inc. Specifically-defined smoking article with activated carbon sorbent and sodium bicarbonate-treated fibers and method of treating mainstream smoke
CN111557467A (en) * 2020-05-13 2020-08-21 四川中烟工业有限责任公司 Preparation method of cyan cigar wrapper tobacco leaves
CN112523003A (en) * 2020-12-03 2021-03-19 中国制浆造纸研究院有限公司 Preparation method of hard groove paper for cigarette filter stick

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Publication number Publication date
FR1465842A (en) 1967-01-13
GB1085582A (en) 1967-10-04
US3417758A (en) 1968-12-24
ES321774A1 (en) 1967-01-01
BE674968A (en) 1966-05-03

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