DEPOLYMERIZATION OF POLYAMIDE

Title:

DEPOLYMERIZATION OF POLYAMIDE

Document Type and Number:

Japanese Patent JPH11152266

Kind Code:

A

Abstract:

To depolymerize a polyamide without producing waste stream as far as possible, with high selectivity of the polyamide to the corresponding monomer components, by using a specific amount of a catalyst in the presence of an aliphatic alcohol.

A polyamide is depolymerized in the presence of 1-100 wt.% (pref. 1-20 wt.%, esp. 1-10 wt.%), based on the polyamide, of an aliphatic alcohol (monohydric alcohol such as methanol or ethanol, or polyhydric alcohol such as ethylene glycol or propylene glycol) and ≤50 wt.% of water using ≤40 mol.%, (pref. 5-30 mol.%, esp. 10-20 mol.%) of a catalyst (e.g. phosphoric acid, phosphorous acid polyphosphortc acid, BORIC ACID sulfuric acid, hydrochloric acid) at 180°C to the critical temperature of the alcohol (pref. 200-350°C).

Inventors:

BOOIJ MARTIN
FRENTZEN YVONNE HELENE
HOMMEZ BART KURT STEFFAAN
GOETHALS ERIC JOZEF

Application Number:

JP22922798A

Publication Date:

June 08, 1999

Filing Date:

July 10, 1998

Export Citation:

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Assignee:

DSM NV

International Classes:

B01J23/04; B01J27/16; C07C231/00; C07D201/12; C08F8/50; C08J11/10; C08J11/24; (IPC1-7): C07D201/12; B01J23/04; B01J27/16; C08J11/10

Attorney, Agent or Firm:

Mitsuo Matsui

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