Mineral- and Clay-Based Absorbents

Examples of Mineral-Based and Clay-Based Absorbents include Budget Dry® (ground clay), kitty litter, Safe-T-Sorb® (ground clay), Vermiculite (composition varies with source), and Zorball®. The following categories of chemicals have been known to react (that is, are incompatibleSubstances that react together, if mixed.) with Mineral-Based and Clay-Based Absorbents:

Category: Amines and Other Bases

  • Reason for Concern:ÌýThese chemicals may exhibit high heats of absorption. The degree of hazard is highly dependent on the individual combination of materials. Test to determine compatibility.
  • Examples:ÌýDiethylamine; Ethanolamine; Pyridine; Tripropylamine
  • Reactive Groups:ÌýAmines, Phosphines, and Pyridines; Bases, Strong

Category: Epoxide Monomers

  • Reason for Concern:ÌýMonomersOne of the molecules that link together to make a polymer. For example, the monomer of natural rubber is isoprene. Monomers may be naturally occurring or synthetic.Ìýwith an ethylene oxide/oxirane functionality may react with the active sites in the absorbent, catalyzing an exothermicA chemical reaction that generates heat. Opposite of endothermic, in which heat is taken in from the surroundings. epoxide ring opening.
  • Examples:ÌýEthylene oxide (EO); Propylene oxide (PO)
  • Reactive Groups:ÌýEpoxides
Note: Although epoxide and styrenic monomers have known incompatibilities with Mineral-Based and Clay-Based Absorbents, other monomers may be compatible. Acrylates and Acrylic Acids are acceptable to use with Clay-Based Absorbents (Hankin. 1986. Journal of Hazardous Materials. 13: 217-226.). Under worst-case adiabatic conditions, ARC results and modeling indicate that spills of these inhibited monomers can be treated with Clay-Based Absorbents, when the same care and precautions are taken as with Non-Clay-Based Absorbents.

Category: Hydrofluoric Acid

  • Reason for Concern:ÌýHydrofluoric acid may react exothermically with the silicate structure in these absorbents. Aqueous solutions of other inorganicCompounds that do not contain the element carbon, as well as the following carbon-containing compounds: the carbon oxides, the carbides, carbon disulfide, phosgene, cyanides of metals, and carbonyl sulfide. fluorides could also contain hydrofluoric acid, and so would react similarly with Clay-Based Absorbents.
  • Examples:ÌýHydrofluoric acid; Ammonium bifluoride solution; Sodium fluorosilicate solution; Boron trifluoride diethyl etherate
  • Reactive Groups:ÌýFluoride Salts, Soluble

Category: Styrenic Monomers

  • Reason for Concern:ÌýAbsorbent may catalyzeTo act as a catalyst--that is, to speed up a chemical reaction between other substances without itself being chemically changed or consumed. exothermic, uncontrolled polymerizationChemical reaction in which small molecules join to form larger molecules; polymerization reactions typically release heat, and can cause containers to overpressurize. leading to a thermal runaway, which could result in a fire or explosionA chemical or physical process in which the rate at which energy is being generated exceeds its ability to escape to its surrounding environment. The hazards of an explosion can include a shock wave (especially near the point of explosion) and projectiles generated by the shock wave..
  • Examples:ÌýStyrene; Divinylbenzene (DVB); Vinylbenzyl chloride (VBC)
  • Reactive Groups:ÌýPolymerizable Compounds
Note: Although epoxide and styrenic monomers have known incompatibilities with Mineral-Based and Clay-Based Absorbents, other monomers may be compatible. Acrylates and Acrylic Acids are acceptable to use with Clay-Based Absorbents (Hankin. 1986. Journal of Hazardous Materials. 13: 217-226.). Under worst-case adiabatic conditions, ARC results and modeling indicate that spills of these inhibited monomers can be treated with Clay-Based Absorbents, when the same care and precautions are taken as with Non-Clay-Based Absorbents.

Category: Water-Reactive 365betÓéÀÖ

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