Abstract: Hydromagnesite-magnesium hydroxide compositions which, when used as fillers in smoking article wrappers, significantly reduce the amount of sidestream smoke produced by the burning smoking article while providing the smoking article with good subjective characteristics.

Abstract: Hydromagnesite-magnesium hydroxide compositions are prepared which, when used as fillers in smoking article wrappers, significantly reduce the amount of sidestream smoke produced by the burning smoking article while providing the smoking article with good subjective characteristics.

Abstract: A carbonaceous heat source comprising metal oxides and methods for making such heat source are provided. The heat source has an ignition temperature substantially lower than conventional carbonaceous heat sources, while at the same time produces virtually no carbon monoxide upon combustion. The heat source is prepared by pre-forming the carbon and binder materials into a desired shape, and then treating the shape with a sol containing metal oxide precursors. The metal oxide precursors are deposited in the pre-formed carbon shape. Further treatment converts the deposited metal oxide precursors into metal oxide.

Abstract: A carbonaceous heat source comprising metal oxides and methods for making such heat source are provided. The heat source has an ignition temperature substantially lower than conventional carbonaceous heat sources, while at the same time produces virtually no carbon monoxide upon combustion. The heat source is prepared by pre-forming the carbon and binder materials into a desired shape, and then treating the shape with a sol containing metal oxide precursors. The metal oxide precursors are deposited in the pre-formed carbon shape. Further treatment converts the deposited metal oxide precursors into metal oxide.

Abstract: An iron carbide heat source, particularly useful in smoking articles, is provided. The iron carbide particles making up the heat source have ignition temperatures that are substantially lower than conventional carbon particles normally used in carbonaceous heat sources, while at the same time provide sufficient heat to release a flavored aerosol from a flavor bed for inhalation by the smoker. In a preferred embodiment, the iron carbide heat source of this invention is substantially cylindrical in shape and has one or more fluid passages therethrough. Upon combustion, the heat source produces substantially no carbon monoxide.

Abstract: An efficient, low-temperature process for the preparation of highly pure, free-flowing aluminum nitride powder without oxygen contamination, comprising the steps of:(1) forming a mixture of ##STR1## and (b) AlCl.sub.3 ;(2) reacting the mixture formed in step (1) at a temperature of from 0.degree. C. to 150.degree. C. and thereby forming ##STR2## (3) maintaining the Cl.sub.2 --Al--NH--Si(CH.sub.3).sub.3 formed in step (2) at a temperature of from 170.degree. C. to 200.degree. C. and thereby forming Cl--Al--NH and (CH.sub.3).sub.3 --SiCl; and(4) maintaining the Cl--Al--NH formed in step (3) at a temperature of at least 450.degree. C. and thereby forming H.sub.2, Cl.sub.2, and AlN.