JPS5653128A - Recovery and regeneration of raw material from polyurethane - Google Patents
Recovery and regeneration of raw material from polyurethaneInfo
- Publication number
- JPS5653128A JPS5653128A JP5416780A JP5416780A JPS5653128A JP S5653128 A JPS5653128 A JP S5653128A JP 5416780 A JP5416780 A JP 5416780A JP 5416780 A JP5416780 A JP 5416780A JP S5653128 A JPS5653128 A JP S5653128A
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane
- raw material
- regeneration
- recovery
- effect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
PURPOSE: To recover and regenerate the raw material of polyurethane from waste polyurethane, economically, safely, at a low cost, by the ammnolysis of the polyurethane with a compound which generates ammonia by heating.
CONSTITUTION: Waste polyurethane is mixed with an inorganic or organic compound which generates ammonia gas by the thermal decomposition at 50W200°C [e.g. ammonium (bi)carbonate, urea, etc.] and if necessary, a solvent (e.g. water or methanol). The mixture is heated at 50W200°C to effect the ammonolysis of said polyurethane.
EFFECT: The recovered raw material can be reused without particular purification.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5416780A JPS5653128A (en) | 1980-04-25 | 1980-04-25 | Recovery and regeneration of raw material from polyurethane |
DE3037545A DE3037545C2 (en) | 1979-10-05 | 1980-10-03 | Process for the recovery of raw materials from polyurethane |
GB8032085A GB2062660B (en) | 1979-10-04 | 1980-10-06 | Method of recovering and reproducing raw materials from polyurethanes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5416780A JPS5653128A (en) | 1980-04-25 | 1980-04-25 | Recovery and regeneration of raw material from polyurethane |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54128012 Division | 1979-10-04 | 1979-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5653128A true JPS5653128A (en) | 1981-05-12 |
Family
ID=12962981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5416780A Pending JPS5653128A (en) | 1979-10-04 | 1980-04-25 | Recovery and regeneration of raw material from polyurethane |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5653128A (en) |
-
1980
- 1980-04-25 JP JP5416780A patent/JPS5653128A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3064616D1 (en) | Process for purifying urea-containing waste water and process for preparing melamine | |
JPS5653128A (en) | Recovery and regeneration of raw material from polyurethane | |
JPS5367959A (en) | Method of treating organic waste water | |
DE59101448D1 (en) | Process for the recovery or disposal of ammonia or ammonium compounds from dust mixtures. | |
JPS539711A (en) | Recovery of dimethylformamide | |
JPS5226555A (en) | Method for recovering polyamides | |
JPS52129677A (en) | Treatment of gas containing nitrogen oxides | |
JPS5581728A (en) | Gas treating method | |
JPS51144058A (en) | Method of purifying water using catalytically activated carbon | |
Cassel et al. | Physical-chemical nitrogen removal from municipal wastewater | |
JPS53130860A (en) | Method of completely removing nitrogen contained in waste water | |
JPS5659738A (en) | Preparation of diaminonaphthalene | |
JPS5239967A (en) | Excellent treating method for sewage | |
JPS5326273A (en) | Treating method for waste solution | |
JPS5321857A (en) | Method of treating ammonia-containing liquid | |
JPS521961A (en) | Process for treating sewage water | |
JPS5375168A (en) | Recovering method of ammonia | |
JPS5390178A (en) | Water purifying method | |
KR930009935A (en) | Wastewater Treatment System Generated in Synthetic Resin Manufacturing | |
JPS53130276A (en) | Treating method for waste containing cyanic compound | |
JPS537973A (en) | Process for treating waste water containing vi-valence chromium using | |
JPS5541850A (en) | Decreasing sulfur and nitrogen compound and cod in waste water | |
JPS55114333A (en) | Method for decreasing nitrogen oxide in waste gas | |
JPS51116177A (en) | A method for recovering solvent | |
JPS5346491A (en) | Production of granular waste water treating agent |