Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant
Patent
1987-06-05
1989-02-21
Lieberman, Allan M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From aldehyde or derivative thereof as reactant
528250, 528497, 528498, 528501, 525 54, 525472, C08L 5904
Patent
active
048066222
ABSTRACT:
Polyacetal obtained by the polymerization of trioxane, for example, suspended in an organic solvent, in the presence of a comonomer (for example, ethylene oxide), is stabilized by hydrolysis in the heated state under pressure and then, after hydrolysis, the reaction mixture is depressurized to atmospheric pressure in order to release an aqueous phase containing the polymer and a vapor phase which contains formaldehyde and trioxane. According to the invention, the latter is recycled directly into the formaldehyde trimerization stage under reduced pressure.
REFERENCES:
patent: 3027352 (1962-03-01), Walling et al.
patent: 3197437 (1965-07-01), Wall
patent: 3225005 (1965-12-01), Asmuth et al.
patent: 4024105 (1977-05-01), Sextro et al.
patent: 4087411 (1978-05-01), Sugio et al.
patent: 4458064 (1984-07-01), Chatterjee
Angew. Chem., vol. 79, pp. 512-514 (1967) "Preparation of Trioxane" by K. Weissermel et al.
Hydrocarbon Processing, vol. 45, pp. 155-170 (1966) "Polyacetal Resins-A 1966 Review" by M. Sittig et al.
Lieberman Allan M.
Solvay & Cie (Societe Anonyme)
LandOfFree
Process for the manufacture of polyacetals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the manufacture of polyacetals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the manufacture of polyacetals will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1522965