A production process for preparing fulvic acid and high-strength corrugated pulp from non-wood fiber raw materials

A non-wood fiber and fulvic acid technology, which is applied in the fields of cellulose raw material pulping, fiber raw material, and fiber raw material processing, etc., can solve the problem of the dark color of pulp, the influence of fulvic acid purity and activity, and the fulvic acid problems such as direct extraction and pulp performance, to achieve the effect of improving strength and utilization, promoting extraction and purification, and simplifying the process

Active Publication Date: 2019-05-14
白博
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AI Technical Summary

Problems solved by technology

[0006] The third is that there is no mature, complete and effective industrialization technology for the comprehensive utilization of cotton stalk raw material resources.
[0008] 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
[0009] The second is the existing chemical pulping, chemical-mechanical pulping, semi-chemical pulping process and even the sulfite pulping process, as well as the pulping process that uses cotton stalks as raw materials to produce fulvic acid and the pulping process that uses cotton stalks as raw materials. Almost none of the pulping and papermaking processes take into account the direct extraction of fulvic acid and the performance of pulp, and no industrially comprehensive and coordinated integrated solution is proposed for the production of fulvic acid using cotton straw as raw material and the production of high-strength corrugated pulp.
In the existing fulvic acid extraction process, people's ideas are often limited to using fulvic acid as an auxiliary means for comprehensive utilization of black liquor and pollution reduction. The impact of fulvic acid on the purity and activity of the pulping process under the acidic cooking conditions required for fulvic acid extraction is not considered, and the co-production matching effect of fulvic acid and pulp is not ideal

Method used

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  • A production process for preparing fulvic acid and high-strength corrugated pulp from non-wood fiber raw materials
  • A production process for preparing fulvic acid and high-strength corrugated pulp from non-wood fiber raw materials
  • A production process for preparing fulvic acid and high-strength corrugated pulp from non-wood fiber raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] (1) The technological process is as follows: pulverizing the whole cotton straw, dedusting, cooking, refining, and extracting the black liquor. Dust removal, cooking, extraction of black liquor, high-consistency refining, and extraction of black liquor. The follow-up process is divided into two processes, one for pulp washing, high-consistency refining, low-consistency refining, screening, pulping, and papermaking, and the other for The black liquor is collected, processed, and then produced as required in liquid form of fulvic acid fertilizer, or concentrated and granulated to produce solid form of fulvic acid fertilizer.

[0092] (2) The raw material of cotton stalks from Alar City of the First Division of the Xinjiang Construction Corps was crushed to 3-5mm, including the main neck, twigs, skins and residual cotton boll shells of the cotton stalks, including cotton stalk skins, cotton stalks The stalk core, also including the cotton stalk core pith and the cotton in ...

Embodiment 2

[0107] Other conditions are the same as in Example 1, (3) The cooking process conditions are: heating to 120°C at room temperature, letting off steam for 20min, continuing to heat to a temperature of 160°C, holding time for 60min, and converting the amount of ammonium sulfite to dry weight of the raw material 10% of anthraquinone, 0.5% of anthraquinone, cooked in a 15L rotary electric pressure cooker, the pH of the cooking start was 7, the pH of the cooking end was 5.5, the refining gap was 0.3mm, and the pulp yield was 59.4%.

[0108] The detection indicators are:

[0109] Table 6

[0110]

[0111]

[0112] As shown in the table, after removing moisture, the yield of fulvic acid was 40.38%, the total acidic group was 1.03mmol / g, the carboxyl group was 0.44mmol / g, and the phenolic hydroxyl group was 0.59mmol / g.

[0113] Table 7

[0114] index

Embodiment 3

[0116] (1) The technological process is as follows: crushing wheat straw, dedusting, cooking, refining, and extracting black liquor. Cooking, black liquor extraction, high-consistency refining, and black liquor extraction, the follow-up process is divided into two processes, one for pulp washing, high-consistency refining, low-consistency refining, screening, pulping, and papermaking, and the other for black liquor Collect, process, and then produce fulvic acid fertilizer in liquid form as required, or produce fulvic acid fertilizer in solid form after concentration and granulation.

[0117] (2) Take the wheat straw raw material, cut it to 3-5mm, measure the water content, and weigh 1000g of dry matter.

[0118] (3) The cooking process conditions are: heating to 120°C at room temperature, releasing steam for 20 minutes, continuing to heat to a temperature of 160°C and holding time for 60 minutes, the amount of ammonium sulfite added is converted to 10% of the absolute dry weig...

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Abstract

Disclosed is an acidic ammonium sulfite method-based production process for preparing fulvic acid and a high-strength corrugated paper pulp with non-wood fibers as a raw material. With the non-wood fibers as a raw material and by using an acidic ammonium sulfite method-based production process, pulping and fulvic acid extraction or leaching are completed under acidic cooking environment conditions with a pH of 2-7, while the dissolution of humic acid and ulmic acid are inhibited. By means of this production process, fulvic acid is prepared by means of cooking and pulping, and at the same time a high performance paper pulp with a lighter color is produced for use in producing a fiber article such as high-strength corrugated paper. The production process realizes synergistic optimization of the cooking step for pulping and fulvic acid from all-cotton straws and other non-wood fiber resources, so that a black pulping liquor is turned from waste into something of value, the technical key to industrialization and commercialization for realizing clean production and sustainable development is solved, and cyclic development with regard to economic and ecological benefits can be realized.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of non-wood fiber raw materials, in particular to an acid immonium method production process for preparing fulvic acid and high-strength corrugated pulp by using non-wood fiber as raw materials. Background technique [0002] Take the typical cotton stalk raw material as an example to illustrate the design. [0003] The abundant raw materials of cotton stalks, the large gap in the market for fulvic acid and high value-added fibers, the increasingly stringent environmental protection policies, and the urgent need for breakthroughs and innovations in large-scale industrial production technologies are the opportunities and challenges for the comprehensive utilization of cotton stalk resources. [0004] 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/16D21C3/20D21C3/04D21C3/22D21H11/12C05F11/02
CPCC05F11/02D21B1/16D21C3/06D21C3/20D21C3/222D21H11/12
Inventor 白博白嘉妮王勇王立群
Owner 白博
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