To provide a method for industrially producing a methyl hydroxyalkyl cellulose and an apparatus therefor.
This method for industrially producing a methyl hydroxyalkyl cellulose (MHAC) comprises reacting cellulose with an alkali metal hydroxide and subsequently reacting with an alkyl halide and a hydroxyalkylating agent. The reaction is carried out batchwise in a reactor which has an L/D ratio of less than 2.5 and in which the unmixed regions are minimized and the batch reactor is preceded at the inlet by a continuously operated cellulose milling facility and is followed at the outlet by a continuously running plant for milling and drying the products, with the product being transported by action of gravity. This apparatus for carrying out the method and the methyl hydroxyalkyl cellulose obtainable by the method are also described.
MICHEL STEFAN (DE)
SONNENBERG GERD (DE)
