Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-10-13
1980-07-15
Woodberry, Edward M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 173, 568724, 568758, C08L 102
Patent
active
042127750
ABSTRACT:
The process comprises isolating phenol and partially formaldehyde wherein molar ratio thereof is from 1:1.4 to 1:3.5 at a pH of from 0.65 to 0.8 in the presence of a vegetable sorbent, such as saw-dust, at the boiling point. The resultant product of reaction of phenol and formaldehyde with components of the sorbent is separated from the liquid phase and used. Methanol is removed from the liquid phase, whereafter residual formaldehyde is isolated therefrom by adding a condensation component selected from phenol and urea and a vegetable sorbent. The process is conducted at 60.degree.-100.degree. C. at a pH of from 0.65 to 10. The resultant product of reaction of the phenolic component, formaldehyde and components of the sorbent is also used.
The process enables the purification degree of waste liquors from toxic substances to be as high as 98-99%, and makes it possible to obtain a useful product.
REFERENCES:
patent: 2247523 (1941-07-01), Schick et al.
patent: 2343165 (1944-02-01), Adler
patent: 3215653 (1965-11-01), Hughes
patent: 3290390 (1966-12-01), Prahl et al.
patent: 3575884 (1971-04-01), Seiler
Chem. Absts: vol. 81 (1974) 111220p, "Purification of Water from the Production Phenol-Formaldehyde Resins", Krasnoselov et al.
Chem. Absts., vol. 79: 96677f, Apparatus for the Purification of Waste Water, Adegeest.
Chem. Abst., vol. 72: 101365q, Separation of Phenolic Compounds from Reaction Mixtures, Moss et al.
Babina Margarita D.
Dunjushkin Evgeny S.
Gabets Anna P.
Glumova Valentina A.
Naumova Ljudmila A.
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Woodberry Edward M.
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