Method for improving reactive performance of prehydrolysis sulfate dissolving pulp

Abstract

The invention discloses a method for improving the reactive performance of prehydrolysis sulfate dissolving pulp. The prehydrolysis sulfate dissolving pulp of needle leaf wood or broad leaf wood with the concentration of 30 percent is adopted, 18 L of water are firstly added to a pulp tank of a pulping machine, the pulp is added slowly, water is supplemented, so that the concentration of the pulp reaches 1.57 percent, pulping is carried out for 10-90 minutes, the pulp is concentrated to the concentration of 20 percent, then the pulp is taken and transferred into a polyethylene plastic bag with a sealing opening, distilled water and cellulase liquid are added to dilute the pulp to the concentration of four percent, enzyme / bone dry pulp is 3.0 u / g-4.0 u / g, the pH value is adjusted to be three to six, and the pulp is placed in a water bath kettle to be treated. Suction filtration is carried out on the treated pulp, water of 90 DEG C is added to the pulp until the concentration of the pulp is four percent, heating is carried out for 30 minutes, and the pulp is air-dried to the concentration of 95 percent under the condition of constant temperature and constant humidity. The method has the advantages that the reactive performance of the dissolving pulp is improved by combining mechanical treatment and enzyme treatment, and the reactive performance of the prehydrolysis sulfate dissolving pulp can be improved.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and relates to a method for improving the reaction performance of prehydrolyzed sulfate-dissolving pulp. Background technique [0002] Dissolving pulp, also known as refined pulp or pulp, has higher cellulose content (90-99%), lower hemicellulose (2-4%) and lignin content (less than 1%) and trace amounts of Resin and ash content are currently the main way to obtain high-purity cellulose other than cotton. It is mainly used in the textile industry and tobacco manufacturing industry, of which 60% is used in the production of viscose fiber for textile use. As the production technology of many cellulose products matures, the cellulose raw materials represented by dissolving pulp will be endowed with more use value. In 2013, the output of viscose fiber in my country was 3.145 million tons, and the production capacity of domestic cotton pulp was maintained at about 1 million tons per y...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for improving the reaction performance of pre-hydrolyzed sulfate dissolving pulp, which solves the problem of low reaction performance of existing dissolving pulp

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