The invention relates to a method for the acidic or alkaline saponification of biphenyl nitriles.
Cylindrical saponifying-liquid delivery rollers (13) are disposed as guide rollers in a saponifying liquid inside a saponification tank.
crude glycerol obtained by catalytic saponification
Even when 1,2-glycol bonds are incorporated in an increased amount, the copolymer (paste) before saponification has intact solubility in a saponification solution (methanol).
or [saponification with NaOH 12M (glycerol and soap
The vegetable fatty acid has a saponification value of about 271 and an acid value of about 269.
It is preferable that the polyvinyl alcohol has a degree of saponification of 94.5 mol% or higher.
It is preferable to subject the hard coat layer to alkali saponification.
No by-products are formed and saponification is avoided due to the acid transesterification.
The polyvinyl alcohol preferably has a saponification degree of 35-99% by mole.
Properties that are sought in traditional saponification of natural oils are a result of low levels of unsaponifiables.
The polyvinyl alcohol resin (B) has a saponification degree of 60-85% by mole.
Methyl esters are formed by trans-esterification with methanolic potassium hydroxide as an intermediate stage before saponification takes place.
The saponification removes the methyl and phytol ester groups and may partially cleave the cyclopentenyl ring.
The invention relates to a method for the saponification of a rosin acid dispersion into a water-soluble form in a continuously operating manner.
The extract is produced by saponifing Faeces Bombycis, and then followed by extraction, acidification and salification.