摘要:
This invention concerns an apparatus for continuously producing chemically-modified cellulose, obtained by reacting a fine-powder cellulose fiber material and a hydrophobizing chemical substance, and a method that is used in the apparatus. The apparatus constitutes part of an apparatus for continuously producing a cellulose nanofiber composite separator for lithium ion batteries out of a fine-powder cellulose fiber starting material, and contributes to efficiently producing a cellulose nanofiber composite separator for lithium ion batteries. Specifically, the apparatus has a first mechanism for transporting a fine-powder cellulose fiber starting material and a hydrophobizing chemical substance, a specific extruder, a solvent tank connected to the extruder, and a dryer connected to the solvent tank, and the method has a step of washing, in the solvent tank, chemically-modified cellulose having been produced out of the fine-powder cellulose fiber starting material and the hydrophobizing chemical substance in the extruder, and then drying the chemically-modified cellulose in the dryer, in order to remove any unreacted hydrophobizing chemical substance.
摘要:
A process for manufacturing xyloligosaccharides comprises:
steaming a corncob meal under conditions of a temperature of 150 to 250°C and a pressure of 20 to 29 Mpa; filtering the steamed corncob meal to obtain a filtrate from which solid has been removed; performing an enzyme treatment by reacting xylanase with soluble xylan in the filtrate to hydrolyze xylan; removing any suspended matter from a reaction product obtained during the enzyme treatment; and drying the reaction product.
摘要:
In a production process of a cellulose acetate which comprises (a) a reduced pressure-acetylation step of acetylating a cellulose under a reduced pressure in the presence of sulfuric acid or other acidic catalyst, with distilling off a gaseous phase component of the reaction system out of the system, and (b) a post-acetylation step of allowing the acetylation to further proceed by increasing the pressure as compared with the pressure of the reduced pressure-acetylation step by means of release of the pressure reduction of the reaction system or the like, the shift operation from the reduced pressure-acetylation step to the post-acetylation step is conducted by taking a distilling rate of a distillate in the reduced pressure-acetylation step as an index to control the reaction temperature of the post-acetylation step. The shift operation from the reduced pressure-acetylation step to the post-acetylation step may also be conducted by taking a distilling rate after the distilling rate in the reduced pressure-acetylation step has reached a maximum value.
摘要:
In a production process of a cellulose acetate which comprises (a) a reduced pressure-acetylation step of acetylating a cellulose under a reduced pressure in the presence of sulfuric acid or other acidic catalyst, with distilling off a gaseous phase component of the reaction system out of the system, and (b) a post-acetylation step of allowing the acetylation to further proceed by increasing the pressure as compared with the pressure of the reduced pressure-acetylation step by means of release of the pressure reduction of the reaction system or the like, the shift operation from the reduced pressure-acetylation step to the post-acetylation step is conducted by taking a distilling rate of a distillate in the reduced pressure-acetylation step as an index to control the reaction temperature of the post-acetylation step. The shift operation from the reduced pressure-acetylation step to the post-acetylation step may also be conducted by taking a distilling rate after the distilling rate in the reduced pressure-acetylation step has reached a maximum value.
摘要:
In a process for continuous acetylation of polysaccharide, a pressure is to be established in a reactor chamber such that a boiling point of a reaction mixture corresponds to a desired reaction temperature and an exothermicity of the reaction is controlled by evaporative cooling.
摘要:
A process for manufacturing xyloligosaccharides comprises: steaming a corncob meal under conditions of a temperature of 150 to 250°C and a pressure of 20 to 29 Mpa; filtering the steamed corncob meal to obtain a filtrate from which solid has been removed; performing an enzyme treatment by reacting xylanase with soluble xylan in the filtrate to hydrolyze xylan; removing any suspended matter from a reaction product obtained during the enzyme treatment; and drying the reaction product.