A process for producing fulvic acid fertilizer and high-strength corrugated paper with cotton straw as raw material

Abstract

The invention provides a technology for producing a fulvic acid fertilizer and high-strength corrugated paper by using whole cotton stalks as raw materials. With the whole cotton stalks as the raw materials, by a weakly-acid imidized machine pulp pulping technology, through optimal combination of the cooking temperature, the cooking time and the pH value as well as high-concentration pulping and other pulping technological links, pulping red liquor rich in fulvic acid is prepared for producing the fertilizer, and high-performance pulp with a relatively light color is produced for producing thehigh-strength corrugated paper. By the technology, defects and shortcomings of a strong-alkali and strong-acid technology are avoided, differences in traits, components and structures of the whole cotton stalk raw materials are overcome, fulvic acid producing active components contained in cotton stalk cores, cotton stalk pulps, cotton boll shells and cotton stalk skins in the whole cotton stalksare effectively utilized, the advantage of combination of long and short whole cotton stalk fibers is effectively played for producing the high-strength corrugated paper, comprehensive utilization ofwhole cotton stalk resources is achieved, and a technological path for industrial and commercial utilization of the whole cotton stalk raw materials is opened up.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of cotton stalks, in particular to a process for producing fulvic acid fertilizer and high-strength corrugated paper by using whole cotton stalks as raw materials. Background technique [0002] The abundant raw materials of cotton stalks, the large gap in the market for fulvic acid fertilizers and high value-added fibers, the increasingly stringent environmental policies, and the urgent need for breakthroughs in large-scale industrial production technologies are the opportunities and challenges for the comprehensive utilization of cotton stalk resources. [0003] First of all, cotton stalks are rich in resources. Cotton straw raw materials have a huge output every year in my country and even in the world. According to statistics, in 2016, China's cotton planting area was 3.38 million hectares, which was equivalent to 12.67 million tons of cotton straw production, and the world's cotton pla...

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Problems solved by technology

[0005] The third is that there is no mature, complete and effective comprehensive utilization technology of cotton stalk raw material resources

[0007] The existing cotton stalk pulping process also has the problem of "dark" pulp color, which directly limits the high value-added utilization of cotton stalk fiber pulp

[0008] Second, the existing chemical pulping, chemical-mechanical pulping, and semi-chemical pulping processes, as well as the pulping process that uses cotton stalks as raw materials to produce fulvic acid fertilizers, and the pulping and papermaking processes that use cotton stalks as raw materials are almost ignored. In order to take into account the performance of fertilizer and pulp, there is no industrially integrated solution for the production of fulvic acid fertilizer and the production of high-strength corrugated pulp using cotton straw as raw material

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