Recovery of chemical components of cellulosic regenerating solut

Details Recovery of chemical components of cellulosic regenerating solut Recovery of chemical components of cellulosic regenerating solut

1976-08-18

1978-02-14

Bascomb, Jr., Wilbur L.

Compositions: coating or plastic

Materials or ingredients

Vehicles or solvents

106165, 106168, 106169, 201 25, 203 33, 203 36, 203 37, 203 28, 260561R, 423400, 536 38, 536 30, 203 31, C08K 520, C08B 332

Patent

active

040736601

ABSTRACT:
Recovery of the chemical components of a cellulosic organic solvent regenerating solution containing a dialkylacylamide, water, nitrous and nitric acid. The process comprises neutralizing the solution to form the metal salts of nitrous and nitric acid, distilling the neutralized solution to remove and recover the water and dialkylacylamide solvent and pyrolyzing the metal salts in the presence of oxygen to remove and recover nitrogen dioxide gas. The process results in substantially total recovery of the process chemicals.

REFERENCES:
patent: 1845665 (1932-02-01), Isham
patent: 2233959 (1941-04-01), Plansoen
patent: 2310862 (1943-02-01), Nessler
patent: 3063804 (1962-11-01), Grossman
patent: 3070425 (1962-12-01), Morrow
patent: 3236064 (1966-02-01), Williams
patent: 3294651 (1966-12-01), Pasin
patent: 3557207 (1971-01-01), Hammond
patent: 3702843 (1972-11-01), Schweiger
patent: 3929586 (1975-12-01), Slikkers
patent: 3959371 (1976-05-01), Gavlin et al.
Venkateswaren et al., Journal of Applied Polymer Science, vol. 18, 1974, pp. 133-142.

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