Method and system for producing poly (lactic acid)

Details Method and system for producing poly (lactic acid) Method and system for producing poly (lactic acid)

1997-07-02

1999-02-02

Truong, Duc

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528328, 528184, 528480, 528503, C08G 6308

Patent

active

058666770

ABSTRACT:
A method and system for producing poly(lactic acid) enable trapping and recovering of lactide vapor discharged from a reaction vessel without requiring a solvent or the like. In the method and system, lactide vapor is discharged from a polymerization reaction vessel in which poly(lactic acid) is produced by ring-opening polymerization, and trapped by solidification. The solidified lactide is liquefied by heat. Lactide can be recovered more easily and assuredly.

REFERENCES:
patent: 5444113 (1995-08-01), Sinclair et al.

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