| abstract |
REMOVAL OF GASEOUS FORMALDEHYDE WITH SOLID ABSORBENTS Abstract Formaldehyde is used on large scale in chemical industry and it is incorporated in many resin products which are extensively used by the building industry and public. Since formaldehyde has recently been identified as a carcinogenic agent, proper protection against its inhalation is required for occupational personnel and some members of public. Some systems were developed for the remo-val of gaseous formaldehyde in industrial use, however no suitable system has been available for removing formaldehyde from breathing air at very low concentrations. In this invention the process of chemisorption is employed to transfer gaseous formaldehyde to solid, nonvolatile compounds and retain it within the absorber. The absorbers, which can be produced in different forms of a filter, are suitable for occupa-tional respiratory protection, atmosphere purification in working and living areas and for formaldehyde absorption from process gases. The absorbents can also preventively be incorporated into resins containing materials to reduce formaldehyde emissions. |