Devices and systems for collapsible engagement mechanisms are described herein. In some examples, one or more embodiments include a front panel, a first side panel connected to the front panel, a second side panel connected to the front panel, and a collapsible portion connected to at least one of the first side panel and the second side panel, where the collapsible portion is collapsible about a hinge.

Devices and systems for collapsible engagement mechanisms are described herein. In some examples, one or more embodiments include a front panel, a first side panel connected to the front panel, a second side panel connected to the front panel, and a collapsible portion connected to at least one of the first side panel and the second side panel, where the collapsible portion is collapsible about a hinge.

The invention relates to novel methods for processing lignocellulosic material. More specifically, the invention proves an integrated approach for processing cellulose to obtain paper and pulp and valorizing lignin to obtain value-added chemicals and products.

Devices and systems for collapsible engagement mechanisms are described herein. In some examples, one or more embodiments include a front panel, a first side panel connected to the front panel, a second side panel connected to the front panel, and a collapsible portion connected to at least one of the first side panel and the second side panel, where the collapsible portion is collapsible about a hinge.

Devices and systems for collapsible engagement mechanisms are described herein. In some examples, one or more embodiments include a front panel, a first side panel connected to the front panel, a second side panel connected to the front panel, and a collapsible portion connected to at least one of the first side panel and the second side panel, where the collapsible portion is collapsible about a hinge.

A method of treating brown stock in a brown stock washing process is provided. The method includes measuring a refractive index of a brown stock; and dosing an additive to the brown stock according to at least the refractive index of the brown stock. A system for controlling dosing of an additive to a brown stock washing process is also provided. The system includes a refractive index measurement device; a controller configured to receive data provided by the refractive index measurement device and transform the data into additive addition output instructions; and an additive delivery unit configured to receive and execute the additive addition output instructions from the controller.

A method for separating cellulose from a wood-based raw material including hemicellulose, cellulose, and lignin as principal components, includes injecting the wood-based raw material into a dissolution reservoir in which ethylene glycol is stored as a separating agent, and heating the separating agent in the dissolution reservoir at atmospheric pressure to a temperature in a range of 260 C. to 280 C., and reacting the wood-based raw material with the separating agent, evaporating a hemicellulose component from the separating agent and condensing the hemicellulose component, and monitoring a pH value of the condensate of the hemicellulose component. A temperature of the condensate is held at the temperature at which a change in the pH value of the condensate decreases, lignin is dissolved in the separating agent, and crude cellulose that floats in the separating agent is separated and collected.

A method for separating cellulose from a wood-based raw material including hemicellulose, cellulose, and lignin as principal components, includes injecting the wood-based raw material into a dissolution reservoir in which ethylene glycol is stored as a separating agent, and heating the separating agent in the dissolution reservoir at atmospheric pressure to a temperature in a range of 260 C. to 280 C., and reacting the wood-based raw material with the separating agent, evaporating a hemicellulose component from the separating agent and condensing the hemicellulose component, and monitoring a pH value of the condensate of the hemicellulose component. A temperature of the condensate is held at the temperature at which a change in the pH value of the condensate decreases, lignin is dissolved in the separating agent, and crude cellulose that floats in the separating agent is separated and collected.

Disclosed is a method of treating cellulose pulp for use in regeneration of cellulose including the steps of: i) preparing an alkaline metal hydroxide solution having a concentration of 4-10% by weight; ii) adding cellulose pulp to form a slurry; iii) heating the slurry to a temperature of 40-100 C.; and iv) dissolving the treated cellulose pulp in an alkaline solution having a temperature within the range of 10 C. to 12 C.; wherein the percentage by weight is based on the total weight of the slurry.

Devices and systems for collapsible engagement mechanisms are described herein. In some examples, one or more embodiments include a front panel, a first side panel connected to the front panel, a second side panel connected to the front panel, and a collapsible portion connected to at least one of the first side panel and the second side panel, where the collapsible portion is collapsible about a hinge.