A process for producing refined cotton with a high polymerization degree includes: a. selection of material; b. impurity removal; c. impregnation; d. pretreatment: compounding triethanolamine, sodium carbonate, copper sulfate and magnesium oxide in equal proportion to form a cooking compound adjuvant with a mass concentration of 0.2-0.5%, putting the cookingcompound adjuvant into a spherical digester together with the cotton linter subjected to the impregnation treatment, heating to 70 C, stopping heating, and subjecting to idling pretreatment for 40-60 min; e. cooking; f. cooling of the spherical digester; g. formulating a chlorine dioxide bleaching stabilization solution; h. a first stage of bleaching; I. alkali treatment; J. a second stage of bleaching; K. dechlorination; and 1. rolling and drying by baking.

A process for producing refined cotton with a high polymerization degree includes: a. selection of material; b. impurity removal; c. impregnation; d. pretreatment: compounding triethanolamine, sodium carbonate, copper sulfate and magnesium oxide in equal proportion to form a cooking compound adjuvant with a mass concentration of 0.2-0.5%, putting the cookingcompound adjuvant into a spherical digester together with the cotton linter subjected to the impregnation treatment, heating to 70 C, stopping heating, and subjecting to idling pretreatment for 40-60 min; e. cooking; f. cooling of the spherical digester; g. formulating a chlorine dioxide bleaching stabilization solution; h. a first stage of bleaching; I. alkali treatment; J. a second stage of bleaching; K. dechlorination; and 1. rolling and drying by baking.

The present invention relates to the production of cellulose from coffee or cocoa husks. The cellulose extracted can be used to produce paper, card stock, and cardboard. In addition, a composite material also comprising a material that allows the release of aromas is manufactured using said cellulose. Said material is used to manufacture a laminated product for use in primary, secondary and tertiary packaging applications. Said type of article allows printing on the outer surface thereof, is biodegradable and biocompatible.

The present invention relates to the production of cellulose from coffee or cocoa husks. The cellulose extracted can be used to produce paper, card stock, and cardboard. In addition, a composite material also comprising a material that allows the release of aromas is manufactured using said cellulose. Said material is used to manufacture a laminated product for use in primary, secondary and tertiary packaging applications. Said type of article allows printing on the outer surface thereof, is biodegradable and biocompatible.

A method for preparing unbleached biomechanical pulp from straw. Straw is used as a raw material, which is firstly pre-treated with hot water and hot steam, added with a small amount of alkali, and then softened by saturation with hot water, enzymatically treated by adding alkaline biological enzymes, refined, and washed. This method has the advantage that the whole production process does not need alkali recovery, thereby avoiding environmental pollution from the source. This technology conforms to the national industrial policy of resource conservation, economic recycling, energy saving and emission reduction. The present invention overcomes the problems of difficulty in recovering the alkali wastewater accompanying straw pulp and serious pollution in the prior art. This is of great significance for the industrial production of straw pulp and the development of the paper industry.

A method for preparing unbleached biomechanical pulp from straw. Straw is used as a raw material, which is firstly pre-treated with hot water and hot steam, added with a small amount of alkali, and then softened by saturation with hot water, enzymatically treated by adding alkaline biological enzymes, refined, and washed. This method has the advantage that the whole production process does not need alkali recovery, thereby avoiding environmental pollution from the source. This technology conforms to the national industrial policy of resource conservation, economic recycling, energy saving and emission reduction. The present invention overcomes the problems of difficulty in recovering the alkali wastewater accompanying straw pulp and serious pollution in the prior art. This is of great significance for the industrial production of straw pulp and the development of the paper industry.

A torque reaction arrangement (50) for twin press-roll pulp washers comprises a first torque reaction arm (10), a second torque reaction arm (20), a first link (19), and a second link (29). The links are provided between the ends of a respective torque reaction arm and a point close to the mounting to a respective stator of the other torque reaction arm. The torque reaction arms are rigidly mounted to a respective stator of a respective press roll motor. A twin press-roll pulp washer with such a torque reaction arrangement is also disclosed.

A torque reaction arrangement (50) for twin press-roll pulp washers comprises a first torque reaction arm (10), a second torque reaction arm (20), a first link (19), and a second link (29). The links are provided between the ends of a respective torque reaction arm and a point close to the mounting to a respective stator of the other torque reaction arm. The torque reaction arms are rigidly mounted to a respective stator of a respective press roll motor. A twin press-roll pulp washer with such a torque reaction arrangement is also disclosed.

A process for producing binderless formaldehyde-free fiberboard and coproducing fulvic acid from straw. All-element purification, activation, saccharification and separation are carried out on the non-wood fiber raw material through boiling and defibering to obtain primarily activated lignin, purified and activated fibers, monosaccharides of hemicellulose and non-wood fibers, and fulvic acid. Deep activation is carried out on activated lignin. The binderless formaldehyde-free fiberboard is produced by using sufficiently activated lignin and low-molecular-weight monosaccharides as a hardener and binder. By sufficiently activating the lignin, comprehensive utilization of straw fiber as resources is realized, and the special requirements of binderless formaldehyde-free fiberboard for high-quality fibrous raw material and high-activity lignin are met. The boiled dilute black liquor was subjected to extraction and concentrated to obtain fulvic acid, thereby avoiding pollution caused by pulping and board production. The distilled water obtained by carrying out evaporative concentration on the boiled dilute black liquor is reused.

A process for producing binderless formaldehyde-free fiberboard and coproducing fulvic acid from straw. All-element purification, activation, saccharification and separation are carried out on the non-wood fiber raw material through boiling and defibering to obtain primarily activated lignin, purified and activated fibers, monosaccharides of hemicellulose and non-wood fibers, and fulvic acid. Deep activation is carried out on activated lignin. The binderless formaldehyde-free fiberboard is produced by using sufficiently activated lignin and low-molecular-weight monosaccharides as a hardener and binder. By sufficiently activating the lignin, comprehensive utilization of straw fiber as resources is realized, and the special requirements of binderless formaldehyde-free fiberboard for high-quality fibrous raw material and high-activity lignin are met. The boiled dilute black liquor was subjected to extraction and concentrated to obtain fulvic acid, thereby avoiding pollution caused by pulping and board production. The distilled water obtained by carrying out evaporative concentration on the boiled dilute black liquor is reused.