# US 2019/0166904 A1 · Aerosol-generating article having novel tobacco substrate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0166904 A1 - Document ID: US20190166904A1 - Status: Published application - Kind: A1 - Application number: 16/321,932 - Filed: 2017-08-10 - Published: 2019-06-06 - Earliest claimed: 2016-08-17 - Assignees: Philip Morris Products S.A. - Applicants: Philip Morris Products S.A. - Inventors: Gerhard LANG - Web page: https://patentgrep.com/patent/US20190166904A1 ## CPC - A24B 15/287: {by inorganic substances only} - A24B 15/12: of reconstituted tobacco - A24B 15/16: of tobacco substitutes - A24D 1/20: Cigarettes specially adapted for simulated smoking devices - A24B: MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF - A24D: CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES ## Abstract A heated aerosol-generating article is provided, including an aerosol-forming substrate including tobacco and a metal-based sulphide scavenger compound, an amount of a metal component of the sulphide scavenger compound in the aerosol-forming substrate is at least 0.05 percent by weight, based on a total dry weight of the aerosol-forming substrate, and the sulphide scavenger compound is based on a transition metal. ## Claims ### Claim at position 1 -12. (canceled) ### Claim 13 A heat-not-burn article, comprising: an aerosol-forming substrate comprising tobacco and a sulphide scavenger compound based on a transition metal, wherein an amount of a transition metal component of the sulphide scavenger compound in the aerosol-forming substrate is at least 0.05 percent by weight, based on a total dry weight of the aerosol-forming substrate. ### Claim 14 (depends on 13) The heat-not-burn article according to claim 13, wherein the aerosol-forming substrate comprises a sulphide scavenger compound selected from the group consisting of: a transition metal salt, a transition metal complex, a transition metal oxide, and combinations thereof. ### Claim 15 (depends on 13) The heat-not-burn article according to claim 13, wherein the sulphide scavenger compound is based on zinc or copper. ### Claim 16 (depends on 13) The heat-not-burn article according to claim 13, wherein the amount of the transition metal component of the sulphide scavenger compound is between 0.05 percent and 5 percent by weight based on the total dry weight of the aerosol-forming substrate. ### Claim 17 (depends on 16) The heat-not-burn article according to claim 16, wherein the amount of the transition metal component of the sulphide scavenger compound is between 0.25 percent and 2.5 percent by weight based on the total dry weight of the aerosol-forming substrate. ### Claim 18 (depends on 13) The heat-not-burn article according to claim 13, wherein the amount of the transition metal component of the sulphide scavenger compound is at least 0.1 percent by weight based on the total dry weight of the aerosol-forming substrate. ### Claim 19 (depends on 13) The heat-not-burn article according to claim 13, wherein the sulphide scavenger compound in the aerosol-forming substrate provides a reduction of at least 50 percent by weight of hydrogen sulphide during a pre-heating test compared with an equivalent aerosol-generating article without the sulphide scavenger compound in the aerosol-forming substrate, and wherein in the pre-heating test a heating element configured to heat the aerosol-forming substrate in the heat-not-burn article is programmed to heat at 350 degrees Celsius for 30 seconds and then to switch off. ### Claim 20 An aerosol-generating system, comprising: an aerosol-generating device comprising a heating element; and a heat-not-burn article for the aerosol-generating device, the heat-not-burn article comprising: an aerosol-forming tobacco substrate comprising tobacco and a sulphide scavenger compound based on a transition metal, wherein an amount of a metal component of the sulphide scavenger compound in the aerosol-forming substrate is at least 0.05 percent by weight, based on a total dry weight of the aerosol-forming substrate. ### Claim 21 An aerosol-forming substrate for a heat-not-burn article, the aerosol-forming substrate comprising tobacco and a sulphide scavenger compound based on a transition metal, wherein an amount of a transition metal component of the sulphide scavenger compound in the aerosol-forming substrate is at least 0.05 percent by weight, based on a total dry weight of the aerosol-forming substrate, and wherein in a heat-not-burn article comprising the aerosol-forming substrate, the sulphide scavenger compound in the aerosol-forming substrate provides a reduction of at least 50 percent by weight of hydrogen sulphide during a pre-heating test compared with an equivalent heat-not-burn article without the sulphide scavenger compound in the aerosol-forming substrate, and wherein in the pre-heating test a heating element configured to heat the aerosol-forming substrate in the heat-not-burn article is programmed to heat at 350 degrees Celsius for 30 seconds and then to switch off. ### Claim 22 A method for the production of a heat-not-burn article, comprising the steps of: providing a tobacco particulate material; forming a slurry from the tobacco particulate material; incorporating a sulphide scavenger compound based on a transition metal into the slurry formed from the tobacco particulate material; forming a tobacco sheet from the slurry comprising the tobacco particulate material and the metal-based sulphide scavenger compound; forming the tobacco sheet into a plug to provide an aerosol-forming substrate; and combining the aerosol-forming substrate with one or more components to form a heat-not-burn article. ### Claim 23 (depends on 22) The method according to claim 22, wherein cellulose fibers are further incorporated into the slurry. ### Claim 24 (depends on 22) The method according to claim 22, wherein the sulphide scavenger compound based on the transition metal incorporated into the aerosol-forming substrate of the heat-not-burn article reduces a level of hydrogen sulphide released during heating of the heat-not-burn article.