Method for producing paper pulp by adopting cotton stalk peel as raw material

Abstract

The invention relates to a method for producing paper pulp by adopting cotton stalk peel as raw material, which adopts an enzyme-ammonium sulfite method. The enzyme-ammonium sulfite method comprises the steps of: firstly, removing pectin of the cotton stalk peel and degrading lignin by using degumming enzyme and then, preparing coarse pulp by an ammonium sulfite boiling step, and finally processing the coarse pulp by a conventional production method to obtain finished product pulp, wherein the degumming enzyme is prepared by compounding pectinase, laccase and lignin enzyme in the weight ratio of 1-3:1:1, and a degumming enzym solution is prepared by compounding the degumming enzyme, urea and water in the weight ratio of 5:5:1000-15:15:1000; the cotton stalk peel is soaked in the sealed degumming enzyme solution for 24-48 hours in the static state at the temperature of 20-30 DEG C. The weight ratio of the ammonium sulfite to the oven dry cotton stalk peel in a boiling solution is 10-13 percent, and the pH value of the boiling solution is 7-9. In the invention, the pectinase is added in the degumming enzyme, which effectively remove pectic substances and solves the problem that subsequent processing is influenced by the existence of the pectin and industrialized production can not be realized. The invention can produce the paper pulp meeting standards. Compared with the traditional chemical pulp producing method, the invention has the advantages of high pulp yield, energy saving, cost reduction and recycled black liquor.

Description

technical field [0001] The invention relates to a method for producing pulp, in particular to a method for producing pulp by using bast fiber as a raw material and adopting an enzyme-immonium method. Background technique [0002] For a long time, the problem of raw materials has seriously restricted the development of the pulp and paper industry. The raw materials are seriously insufficient, and there are many grass raw materials and few wood raw materials. The serious shortage of wood supply has caused the paper industry to struggle on the grass-based road for decades, and is in a very passive situation. The development of new raw materials has always been a difficult problem being explored by those skilled in the art. Cotton stalk is a raw material under research and development. my country's cotton planting area is more than 80 million mu, of which the annual biomass of cotton stalks is about 4 million tons, and the cotton stalk core is about 12 million tons, with rich...

AI Technical Summary

Problems solved by technology

[0010] 3. Without adding any accelerator, in industrial production, the effect of effectively combining with the substrate cannot be achieved

[0011] 4. The preparation method of the biological enzyme fermentation liquid is not disclosed, but in fact the preparation method of the biological enzyme fermentation liquid has a great influence on the degradation effect, and usually different methods are used for preparation due to different biological enzymes, which is not available in industrial production Operability

[0012] In summary, the plant fiber pulping process in the prior art cannot be directly applied to cotton stalk pulping, and further research is needed on the characteristics of cotton stalk