WO2008045031A3 - Nanolayer oxidation catalysis for smoking articles - Google Patents

Nanolayer oxidation catalysis for smoking articles Download PDF

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Publication number
WO2008045031A3
WO2008045031A3 PCT/US2006/038654 US2006038654W WO2008045031A3 WO 2008045031 A3 WO2008045031 A3 WO 2008045031A3 US 2006038654 W US2006038654 W US 2006038654W WO 2008045031 A3 WO2008045031 A3 WO 2008045031A3
Authority
WO
WIPO (PCT)
Prior art keywords
catalysis
iron oxide
titanium oxide
oxide
pyrolytic
Prior art date
Application number
PCT/US2006/038654
Other languages
French (fr)
Other versions
WO2008045031A2 (en
Inventor
Harold B Dellinger
Slawomir M Lomnicki
Original Assignee
Univ Louisiana State
Harold B Dellinger
Slawomir M Lomnicki
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
Application filed by Univ Louisiana State, Harold B Dellinger, Slawomir M Lomnicki filed Critical Univ Louisiana State
Priority to PCT/US2006/038654 priority Critical patent/WO2008045031A2/en
Priority to EP06850514A priority patent/EP2086361A2/en
Publication of WO2008045031A2 publication Critical patent/WO2008045031A2/en
Publication of WO2008045031A3 publication Critical patent/WO2008045031A3/en

Links

Classifications

    • 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
    • A24D1/00—Cigars; Cigarettes
    • A24D1/002—Cigars; Cigarettes with additives, e.g. for flavouring
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/285—Treatment of tobacco products or tobacco substitutes by chemical substances characterised by structural features, e.g. particle shape or size
    • A24B15/286—Nanoparticles
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/287—Treatment of tobacco products or tobacco substitutes by chemical substances by inorganic substances only
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/287—Treatment of tobacco products or tobacco substitutes by chemical substances by inorganic substances only
    • A24B15/288—Catalysts or catalytic material, e.g. included in the wrapping material
    • 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

Abstract

Catalysis is used to reduce levels of radicals, other toxins, and carbon monoxide in cigarette smoke. The catalysis operates efficiently at temperatures typical of tobacco smoke, is formed from nontoxic materials, and is relatively inexpensive. The nanostructured catalyst contains titanium oxide, iron oxide, and calcium oxide. The catalyst comprises a layer of iron oxide in the y form supported on a titanium oxide core. Addition of calcium cations helps to stabilize the iron oxide in the y form. The iron oxide layer is on the order of a few nanometers thick on the surface of the titanium oxide core, in an 'egg-in-shell' structure. The nanocatalyst is highly active in promoting the oxidation of compounds such as hydroquinone, catechol, other hydrocarbons, chlorinated phenols, semiquinone radicals, and carbon monoxide, at room temperature and higher temperatures. Catalysis remains active in a pyrolytic or combustion environment for extended periods of time, and has high redox cycling potential. The efficiency of catalysis is not strongly affected by coking in a pyrolytic or combustion environment.
PCT/US2006/038654 2006-10-04 2006-10-04 Nanolayer oxidation catalysis for smoking articles WO2008045031A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2006/038654 WO2008045031A2 (en) 2006-10-04 2006-10-04 Nanolayer oxidation catalysis for smoking articles
EP06850514A EP2086361A2 (en) 2006-10-04 2006-10-04 Nanolayer oxidation catalysis for smoking articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2006/038654 WO2008045031A2 (en) 2006-10-04 2006-10-04 Nanolayer oxidation catalysis for smoking articles

Publications (2)

Publication Number Publication Date
WO2008045031A2 WO2008045031A2 (en) 2008-04-17
WO2008045031A3 true WO2008045031A3 (en) 2008-10-30

Family

ID=39283304

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/038654 WO2008045031A2 (en) 2006-10-04 2006-10-04 Nanolayer oxidation catalysis for smoking articles

Country Status (2)

Country Link
EP (1) EP2086361A2 (en)
WO (1) WO2008045031A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201416519D0 (en) * 2014-09-18 2014-11-05 British American Tobacco Co Composite

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040250828A1 (en) * 2003-06-13 2004-12-16 Zhaohua Luan Nanoscale catalyst particles/aluminosilicate to reduce carbon monoxide in the mainstream smoke of a cigarette

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040250828A1 (en) * 2003-06-13 2004-12-16 Zhaohua Luan Nanoscale catalyst particles/aluminosilicate to reduce carbon monoxide in the mainstream smoke of a cigarette

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LOMNICKI ET AL.: "Development of Supported Iron Oxide Catalysts for Destruction of PCDD/F", ENVIRON. SCI. TECHNOL., vol. 37, 2003, pages 4254 - 4260, XP008109600 *
MUTO ET AL.: "Potential Health Risk via Inhalation/Ingestion Exposure to Polychlorinated Dibezno-p-dioxons and Dibenzofurans", BULL. ENVIRON. CONTAM. TOXICOL., vol. 49, 1992, pages 701 - 707, XP008110277 *

Also Published As

Publication number Publication date
EP2086361A2 (en) 2009-08-12
WO2008045031A2 (en) 2008-04-17

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