Portable chemical oxygen generator

A portable chemical oxygen generator comprising:

• a housing enclosing a reaction chamber comprising a first compartment containing an oxygen generating composition comprising a hydrogen peroxide adduct and a temperature stabilizing material comprising a hydrophilic compound producing an endothermic reaction upon dissolution in water, said oxygen generating composition formulated into controlled-release tablets comprising by weight % from 33% to 50% UHP and from 67% to 50% urea to maintain the temperature of the reaction chamber at a level lower than 45° C., and a second sealed compartment made from a liquid impermeable material containing a catalyst dispersed in an aqueous solution;
• activation means attached to the housing for opening the second sealed compartment and for immersing the controlled-release tablets in the aqueous solution;
• a dual membrane filter comprising a first membrane made of a gas permeable and hydrophobic material and a second membrane made of a hydrophilic material impregnated with catalyst particles.

A portable chemical oxygen generator comprising:

• a housing enclosing a reaction chamber comprising a first compartment containing an oxygen generating composition comprising a hydrogen peroxide adduct and a temperature stabilizing material formulated into controlled-release tablets, and a second sealed compartment made from a liquid impermeable material containing a catalyst dispersed in an aqueous solution, said controlled-release tablets having a ratio of tablet length to tablet thickness greater than 8:1 to produce a zero-order release rate of oxygen over a period of time greater than 30 minutes;
• activation means attached to the housing for immersing the controlled-release tablets in the aqueous solution;
• a dual membrane filter comprised of a first membrane made of a gas permeable and hydrophobic material and a second membrane made of a hydrophilic material impregnated with catalyst particles.