A process for removing chloride from a polymer melt
AssigneeReliance Industries Limited
InventorsVijayalakshmi Ravi Puranik, Kalpeshkumar Bhikhubhai Sidhpuria
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Abstract
The present disclosure provides a process for removing chloride from a polymer melt using at least one adsorbent. The adsorbent is selected from a metal oxide mixture, a mixture of alumina and hydrotalcite, crystalline fajausite zeolite and alumina doped with at least one metal. The process of the present disclosure is carried out at a temperature in the range of 260° C. to 280° C., and at a pressure in the range of 120 bar to 160 bar for time period in the range of 12 hours to 200 hours. The amount of chloride adsorbed on the adsorbent is in the range of 0.1% to 6.0% w/w.
Claims14
A process for removing chloride from a polymer melt using at least one adsorbent, the process comprising the following steps:
- dissolving the polymer melt containing chlorides with at least one fluid medium to form a polymer melt solution;
- extracting the chlorides from the polymer melt solution by adsorbing chlorides on at least one adsorbent that is contacted with the polymer melt solution at a predetermined temperature to obtain a resultant mixture containing treated polymer melt solution and adsorbent with adsorbed chloride;
- and
- separating the adsorbent with adsorbed chloride from the resultant mixture to obtain a polymer melt solution with reduced chloride content.
Dependencies are inferred from the claim text.