Plerumque in synthesis hydroxypropyl methylcellosa, cum celluloso celluloso tractata est cum Alkali solutio ad 35-40 ° C ad semihoram, expressi, in XXXV ° C, ita ut adeptus est in cursu average est in average est in cursu average. Posuit alcali alimentorum fibra in etherification kettle, addere propylene cadmiae et methyl chloride in vicissim et etherify at 50-80 ℃ ad V horas ad altum pressura de 1.8 MPA. Tum adde quod conveniens moles hydrochloric acidum et oxalic acidum ad calidum aqua ad XC ° C ad lava in materia ad expand volumine. Dehydrate cum Centrifuge. Lava usque neutrum, cum aquam contentus in materia est minus quam LX%, siccat illud cum a calidum aer fluxus ad CXXX ° C ad minus quam V%.
Alkalization: The powdered refined cotton after opening is added into an inert solvent, and activated with alkali and soft water to swell the crystal lattice of the refined cotton, which is conducive to the penetration of etherifying agent molecules and improves the uniformity of the etherification reaction. Et alkali usus est in alkalization est metallum hydroxide aut organicum basi. Quantum Alkali addidit (a missa, eadem infra) 0.1-0.6 temporibus probatos bombacio et moles mollis aqua 0.3-1.0 temporibus qui probatos bombacio; Inerti solvendo est mixturam alcohol et hydrocarbon, et moles inerti solvendo addidit est probatos bombacio. 7-15 tempora, inerti solvendo potest etiam esse cum alcohol cum 3-5 carbonis atomorum (ut alcohol, propanol), acetone. Potest etiam aliphaticis hydrocarbonum et aromaticum hydrocarbones; Temperatus debet esse imperium in 0-35 ° C in alkalization; Et alkalization tempus est de 1hr. Temperatio temperatus et tempus potest determinari secundum necessitates in materia et uber.
Etherification: Post alkalization curatio, in vacuo conditionibus, etherification est peragitur per addendo et etheringing agens, et etheringing agens est propylene cadmiae. Ut ad redigendum consummatio ex ethering agente, et Aethereing agente addidit bis in æprificatione processus.
Post tempus: Feb, 20-2025