Mechanochemical dechlorination of polyvinyl chloride with calcium sulfates

William Tongamp; Junya Kano; Kibu Chiyo; Fumio Saito

doi:10.1007/s10163-007-0199-4

Mechanochemical dechlorination of polyvinyl chloride with calcium sulfates

William Tongamp, Junya Kano, Kibu Chiyo, Fumio Saito

Center for Mineral Processing and Metallurgy (CMPM)

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Polyvinyl chloride (PVC) was milled with hydrated or unhydrated calcium sulfates (CaSO₄•2H₂O or CaSO₄) in air by using a planetary mill to investigate mechanochemical dechlorination behavior. The milling process resulted in size reduction and in the breaking of bonds leading to mechanically induced solid state reaction, forming CaCl₂ and dechlorinated hydrocarbon with C=C double bonds in the product. Washing the milled mixtures with water at room temperature allowed removal of the chloride formed during milling, and more than 95% of the chlorine in PVC was removed from a mixture milled for 4 h. This process could offer a potential route for the handling and disposal of both PVC and gypsum wastes. H₂S gas was generated during milling; more H₂S was released from the unhydrated sample than from the hydrated sample.

Original language	English
Pages (from-to)	140-143
Number of pages	4
Journal	Journal of Material Cycles and Waste Management
Volume	10
Issue number	2
DOIs	https://doi.org/10.1007/s10163-007-0199-4
Publication status	Published - 2008 Sept 1

Keywords

Calcium sulfates
Mechanochemical dechlorination
Milling
Polyvinyl chloride
Waste gypsum

ASJC Scopus subject areas

Waste Management and Disposal
Mechanics of Materials

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10.1007/s10163-007-0199-4

Cite this

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abstract = "Polyvinyl chloride (PVC) was milled with hydrated or unhydrated calcium sulfates (CaSO4•2H2O or CaSO4) in air by using a planetary mill to investigate mechanochemical dechlorination behavior. The milling process resulted in size reduction and in the breaking of bonds leading to mechanically induced solid state reaction, forming CaCl2 and dechlorinated hydrocarbon with C=C double bonds in the product. Washing the milled mixtures with water at room temperature allowed removal of the chloride formed during milling, and more than 95% of the chlorine in PVC was removed from a mixture milled for 4 h. This process could offer a potential route for the handling and disposal of both PVC and gypsum wastes. H2S gas was generated during milling; more H2S was released from the unhydrated sample than from the hydrated sample.",

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AU - Tongamp, William

AU - Kano, Junya

AU - Chiyo, Kibu

AU - Saito, Fumio

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Y1 - 2008/9/1

N2 - Polyvinyl chloride (PVC) was milled with hydrated or unhydrated calcium sulfates (CaSO4•2H2O or CaSO4) in air by using a planetary mill to investigate mechanochemical dechlorination behavior. The milling process resulted in size reduction and in the breaking of bonds leading to mechanically induced solid state reaction, forming CaCl2 and dechlorinated hydrocarbon with C=C double bonds in the product. Washing the milled mixtures with water at room temperature allowed removal of the chloride formed during milling, and more than 95% of the chlorine in PVC was removed from a mixture milled for 4 h. This process could offer a potential route for the handling and disposal of both PVC and gypsum wastes. H2S gas was generated during milling; more H2S was released from the unhydrated sample than from the hydrated sample.

AB - Polyvinyl chloride (PVC) was milled with hydrated or unhydrated calcium sulfates (CaSO4•2H2O or CaSO4) in air by using a planetary mill to investigate mechanochemical dechlorination behavior. The milling process resulted in size reduction and in the breaking of bonds leading to mechanically induced solid state reaction, forming CaCl2 and dechlorinated hydrocarbon with C=C double bonds in the product. Washing the milled mixtures with water at room temperature allowed removal of the chloride formed during milling, and more than 95% of the chlorine in PVC was removed from a mixture milled for 4 h. This process could offer a potential route for the handling and disposal of both PVC and gypsum wastes. H2S gas was generated during milling; more H2S was released from the unhydrated sample than from the hydrated sample.

KW - Calcium sulfates

KW - Mechanochemical dechlorination

KW - Milling

KW - Polyvinyl chloride

KW - Waste gypsum

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Mechanochemical dechlorination of polyvinyl chloride with calcium sulfates

Abstract

Keywords

ASJC Scopus subject areas

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