A process for the preparation of particulate acylated biopolymer comprising anhydroglucose units, said process comprising the steps of
a. dispersing an amount of particulate non-surface modified biopolymer comprising anhydroglucose units in an amount of a liquid alkenyl carboxylate, or of a mixture of two or more liquid alkenyl carboxylates, in order to form a first dispersion,
b. adding a catalytic composition to the first dispersion such a to form a second dispersion,
c. heating the second dispersion to a temperature above ambient temperature
d. cooling the second dispersion to ambient temperature,
e. isolating the obtained particulate acylated biopolymer,
wherein the amount of a liquid alkenyl carboxylate, or a mixture of two or more liquid alkenyl carboxylates, corresponds to a molar excess of alkenyl carboxylate, the molar excess being defined with respect to the moles of anhydroglucose units comprised in the amount of the particulate non-surface modified biopolymer, and wherein the catalytic composition comprises an amount of one, or two or more, non-nucleophilic bases
一种制备包含脱
水葡萄糖单元的颗粒状酰化
生物聚合物的工艺,所述工艺包括以下步骤
a. 将一定量的包含脱
水葡萄糖单元的非表面改性
生物聚合物分散在一定量的液态烯基
羧酸酯或两种或两种以上液态烯基
羧酸酯的混合物中,以形成第一分散液、
b. 在第一分散液中加入催化成分,以形成第二分散液、
c. 将第二分散液加热到高于环境温度的温度
d. 将第二分散液冷却至环境温度
e. 分离得到的颗粒状酰化
生物聚合物、
其中液态烯基
羧酸酯或两种或两种以上液态烯基
羧酸酯的混合物的量相当于烯基
羧酸酯的摩尔过量,摩尔过量的定义是相对于颗粒状非表面改性
生物聚合物中包含的脱
水葡萄糖单元的摩尔数,其中催化组合物包含一种或两种或两种以上非亲核碱的量