Patent ID: 8288455

Claim:
A method of making a flame retardant composition, the method comprising: providing a noncombustible particulate that includes nanoscale pores; providing a fluid that includes phosphorus; contacting the fluid and the noncombustible particulate; adsorbing the phosphorus from the fluid into the nanoscale pores of the noncombustible particulate to produce the flame retardant composition comprising solid red phosphorus adsorbed by the noncombustible particulate, wherein providing the fluid that includes phosphorus comprises providing a solution of phosphorus in: carbon disulfide, liquid ammonia, liquid sulfur dioxide, liquid carbon dioxide, phosphorus tribromide, phosphorus trichloride, an organic solvent, or a mixture thereof; and adsorbing the phosphorus from the fluid includes adsorbing dissolved phosphorus from the solution of phosphorus into the nanoscale pores of the noncombustible particulate and removing the solvent to form the flame retardant composition.