Method of hygienic disposal of chlorine-containing plastic material
Patent 4031192 Issued on June 21, 1977. Estimated Expiration Date: 
June 21, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 21, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2196246 3220798 3394056 3445192 3716339 3829558 Method for disposal of waste synthetic high polymer Patent #: 3933989 InventorAssigneeApplicationNo. 05/608281 filed on 08/27/1975US Classes:423/488, Recovery or purification422/169, Including means providing sequential purification stages423/481, Hydrogen halide423/659MISCELLANEOUS PROCESSExaminersPrimary: Stern, EdwardAttorney, Agent or FirmForeign Application Priority Data1974-09-05 CHAbstractTo dispose of high-polymer, chlorine-containing plastics, such as PVC, without liberating hydrochloric acid in the atmosphere, the material is placed in a closed vessel and contacted with super-heated steam to split off gaseous hydrochloric acid; the resulting mixture of water vapor, steam and hydrochloric acid is removed, cooled and condensed, so that hydrochloric acid can be derived therefrom; the residue of the material after the hydrochloric acid has been removed can then be safely incinerated with other refuse, etc. |
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