Synergistic combination for inhibiting polymerization
AssigneeBl Technologies, Inc.
InventorsXiaoan Xie, Yongtao Shi, Guixi Zhang, Mei Zhang
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Abstract
A synergistic polymerization inhibitor composition, the composition having a copper salt, and a manganese salt; a copper salt or a manganese salt, and a cationic polymer; or a phenothiazine and a manganese salt. A method for inhibiting polymerization of unsaturated polymerizable monomers, the method providing adding a synergistic polymerization inhibitor composition to an methacrylic acid manufacturing system or component thereof, the composition having a copper salt, and a manganese salt; a copper salt or a manganese salt, and a cationic polymer; or a phenothiazine and a manganese salt.
Claims5
A synergistic polymerization inhibitor composition, the composition comprising:
- A. copper dibutyldithiocarbamate, phenothiazine, hydroquinone, and a cationic polymer selected from polydiallyldimethylammonium chloride, a polymer from epichlorohydrin-dimethylamine-ethylenediamine, polyaluminum chloride, and a polymer from epichlorohydrin-dimethylamine;
- or
- B. copper acetate or manganese acetate, phenothiazine, hydroquinone, and polydiallyldimethylammonium chloride.
Dependencies are inferred from the claim text.