An object of the present invention is to provide a pulverized pulp in which the viscosity reduction caused by pulverization is mitigated and a method for producing cellulose ethers using such pulverized pulp. The above object is achieved by a pulverized pulp of being a pulverized product of a raw material pulp having a pH of 7.5 to 10.5 when measured by dispersing the raw material pulp in water, and having a percent decrease of 30% or less in viscosity caused by pulverization; and a method of producing a cellulose ether including reacting an alkali cellulose obtained from the pulverized pulp and an alkali metal hydroxide solution with an etherifying agent to obtain the cellulose ether.

An object of the present invention is to provide a pulverized pulp in which the viscosity reduction caused by pulverization is mitigated and a method for producing cellulose ethers using such pulverized pulp. The above object is achieved by a pulverized pulp of being a pulverized product of a raw material pulp having a pH of 7.5 to 10.5 when measured by dispersing the raw material pulp in water, and having a percent decrease of 30% or less in viscosity caused by pulverization; and a method of producing a cellulose ether including reacting an alkali cellulose obtained from the pulverized pulp and an alkali metal hydroxide solution with an etherifying agent to obtain the cellulose ether.

The present disclosure relates to a superabsorbent polymer gel derived from renewable and biodegradable materials such as carboxyalkyl cellulose (CAC). The CAC had a degree of substitution (DS) of 0.5<DS<1. The carboxyalkyl cellulose was partially or fully solubilized in alkaline solution and crosslinked with a crosslinker to yield a crosslinked polycarboxy-material with high Water Retention Value (WRV) of at least 118 g/g saline water (0.9% sodium chloride solution) and Centrifuge Retention Capacity (CRC) of at least 90 g saline water/g superabsorbent material.

The present disclosure relates to a superabsorbent polymer gel derived from renewable and biodegradable materials such as carboxyalkyl cellulose (CAC). The CAC had a degree of substitution (DS) of 0.5<DS<1. The carboxyalkyl cellulose was partially or fully solubilized in alkaline solution and crosslinked with a crosslinker to yield a crosslinked polycarboxy-material with high Water Retention Value (WRV) of at least 118 g/g saline water (0.9% sodium chloride solution) and Centrifuge Retention Capacity (CRC) of at least 90 g saline water/g superabsorbent material.

Provided is a hydroxyalkyl alkyl cellulose exhibiting good flowability and high compressibility. More specifically, there are provided a hydroxyalkyl alkyl cellulose having a volume-based average particle size, determined by dry laser diffractometry, of more than 100 m and not more than 150 m; and after dividing all particles into fine particles, spherical particles and fibrous particles by a dynamic image analysis, a volume fraction of the fibrous particles relative to all of the particles of more than 40% and not more than 50%, and a volume fraction of the fine particles relative to all of the particles of less than 2.0%; a solid preparation including the hydroxyalkyl alkyl cellulose; and others.

The present invention is directed to the production of a biopolymer, which may be applied both as an additive in the papermaking process, aiming at improving the physical and mechanical properties thereof in the process for producing cellulose, facilitating the drying process of the same, while conferring the same properties mentioned above for the production of paper, when it is processed. The present invention further relates to the process for producing said biopolymer, the papermaking process, the process for producing cellulose, the use of said biopolymer and the product comprising said biopolymer.

The present disclosure relates to the environmentally preparation of nanocellulose and derivatives thereof. The invention further relates to the preparation of cellulose derivatives.

The present disclosure relates to the environmentally preparation of nanocellulose and derivatives thereof. The invention further relates to the preparation of cellulose derivatives.

A method for producing a cellulose ether having a high viscosity while keeping the same degree of polymerization as that in the production of a shaped pulp without changing a raw material or production facility. More specifically, provided is a method for producing a cellulose ether including steps of: cutting or pulverizing pulp to obtain sheet-like, chip-like, or powdery cellulose pulp, wherein the pulp is formed in a form of roll whose surface layer on at least one of the circumferential side and the ends is removed, or in a form of bale whose surface layer on at least one side is removed; bringing the obtained cellulose pulp into contact with an alkali metal hydroxide solution to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a reaction product mixture; and subjecting the reaction product mixture to purification to obtain the cellulose ether.

According to an example aspect of the present invention, there is provided a method of improving the reactivity and processability of cellulose in order to utilize cheap and easily available raw material and obtain excellent performance for biomaterial manufacturing.