PROCESS FOR PRODUCING MICROCRYSTALLINE CELLULOSE
收藏国家林业和草原科学数据中心2023-02-12 更新2024-03-07 收录
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The present invention relates to a process for producing microcrystalline cellulose from fibrous cellulosic material by acid hydrolysis at an MCC plant. In this process a suspension of cellulosic pulp is thickened， so that filtrate is formed. A consistency of the thickened suspension is adjusted to 5-40 % by adding dilution liquid， and the pH of the suspension is adjusted to a value of 4 or less with acid. The pulp suspension is subjected to acid hydrolysis at at least 120 °C in a reactor to produce a mixture of microcrystalline cellulose and hydrolysate. The mixture is discharged from the reactor to a lower pressure and lower temperature to flash the mixture and to generate flash steam. Microcrystalline cellulose is separated from hydrolysate， and the separated cellulose is washed in one or several washing apparatuses， and the consistency of the microcrystalline cellulose is increased by thickening for further processing or thickening and drying for further processing. The present invention relates to a process for producing microcrystalline cellulose from fibrous cellulosic material by acid hydrolysis at an MCC plant. In this process a suspension of cellulosic pulp is thickened， so that filtrate is formed. A consistency of the thickened suspension is adjusted to 5-40 % by adding dilution liquid， and the pH of the suspension is adjusted to a value of 4 or less with acid. The pulp suspension is subjected to acid hydrolysis at at least 120 °C in a reactor to produce a mixture of microcrystalline cellulose and hydrolysate. The mixture is discharged from the reactor to a lower pressure and lower temperature to flash the mixture and to generate flash steam. Microcrystalline cellulose is separated from hydrolysate， and the separated cellulose is washed in one or several washing apparatuses， and the consistency of the microcrystalline cellulose is increased by thickening for further processing or thickening and drying for further processing.
提供机构：
国家林业和草原科学数据中心
创建时间：
2023-02-12
