A kind of preparation technology of vinegar grade bamboo pulp

A preparation process and technology of bamboo pulp, applied in pulp bleaching, pulping with inorganic alkali, etc., can solve the problems such as the inability to be fully enclosed in the bleaching process, the high price of potassium hydrogen persulfate preparation, and the complicated operation of the enzyme pretreatment process. , to achieve the effect of saving steam consumption, small impact on production and living environment, and consistent performance

Active Publication Date: 2016-03-02
泰盛(江西)生活用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The enzyme pretreatment process is cumbersome to operate and has poor stability; a large amount of acetone and potassium persulfate preparations are used in DMD pretreatment. Acetone is volatile, flammable and explosive, and the bleaching process cannot be completely sealed, and a large amount of acetone will appear in the production process Volatile matter, there is a great security
And potassium hydrogen persulfate preparation is expensive, has improved production cost
Therefore, the above methods are either highly corrosive to equipment, unfriendly to the environment, or have safety problems, or have high production costs. These methods of producing vinegar grade bamboo pulp are inappropriate and are not conducive to promoting the healthy development of the industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Matching bamboo: select 100% Cizhu for slicing;

[0024] (2) Cutting bamboo: ensure that the cut bamboo pieces are 3-5cm long, 1-2cm wide, and the qualified rate is ≥80%;

[0025] (3) Bamboo washing: the cut and bamboo slices are fully washed by water washing equipment to remove impurities such as mud sand, rubber, iron sand, iron lumps, iron particles, iron powder and plastic on the surface of bamboo slices;

[0026] (4) Pre-hydrolysis: use water as the medium to remove hemicellulose, the pre-hydrolysis holding temperature is 160°C, and the holding time is 120 minutes.

[0027] (5) Alkali cooking: use the sulfate method replacement cooking technology, the total effective alkali by weight of the absolute dry bamboo chips is 15%, the white liquor sulfide degree is 18%, the maximum holding temperature is 170°C, and the holding time is 60 minutes; in the hot charging section of the replacement cooking Add the anthraquinone cooking aid to 0.2% of the absolute dry bambo...

Embodiment 2

[0032] (1) Matching bamboo: choose a ratio of 80% Cizhu and 20% Mianzhu for slicing;

[0033] (2) Cutting bamboo: ensure that the cut bamboo pieces are 3-5cm long, 1-2cm wide, and the qualified rate is ≥80%;

[0034] (3) Bamboo washing: the cut and bamboo slices are fully washed by water washing equipment to remove impurities such as mud sand, rubber, iron sand, iron lumps, iron particles, iron powder and plastic on the surface of bamboo slices;

[0035] (4) Pre-hydrolysis: use water as the medium to remove hemicellulose, the pre-hydrolysis holding temperature is 165°C, and the holding time is 90 minutes.

[0036] (5) Alkali cooking: using the sulfate method replacement cooking technology, the total effective alkali is 16% based on the weight of the absolute dry bamboo chips, the white liquor sulfide degree is 20%, the maximum holding temperature is 165°C, and the holding time is 60 minutes; in the hot charging section of the replacement cooking Add the anthraquinone cooking ...

Embodiment 3

[0041] (1) Matching bamboo: select 60% Ci bamboo, 20% Siji bamboo and 20% Mian bamboo for slicing;

[0042] (2) Cutting bamboo: ensure that the cut bamboo pieces are 3-5cm long, 1-2cm wide, and the qualified rate is ≥80%;

[0043] (3) Bamboo washing: the cut and bamboo slices are fully washed by water washing equipment to remove impurities such as mud sand, rubber, iron sand, iron lumps, iron particles, iron powder and plastic on the surface of bamboo slices;

[0044] (4) Pre-hydrolysis: use water as the medium to remove hemicellulose, the pre-hydrolysis holding temperature is 170°C, and the holding time is 60 minutes.

[0045] (5) Alkali cooking: using the sulfate method replacement cooking technology, the total effective alkali is 18% based on the weight of the absolute dry bamboo chips, the white liquor sulfide degree is 20%, the maximum holding temperature is 170°C, and the holding time is 40 minutes; in the hot charging section of the replacement cooking Add 0.3% anthraq...

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Abstract

The invention discloses a preparation process of an acetified bamboo pulp. The process comprises the steps of preparing bamboos, cutting the bamboos, washing the bamboos, pre-hydrolyzing the bamboos, performing soda boiling, washing, screening and bleaching. The steps are characterized in that according to ratio requirements, sinocalamus affinis is more than or equal to 50%, besides, bambusa intermedia and oligostachyum lubricum can be used, and other bamboos can not be used; steam and water are adopted as one of media for pre-hydrolyzing, a sulfate replacement cooking technology is adopted for soda boiling, and an O-D0-EP-D1-Q-P process flow is adopted for bleaching. The yield of the pulp obtained by using the process disclosed by the invention is more than or equal to 32%, the content of alpha cellulose is more than or equal to 96%, the content of pentosan is less than or equal to 5.0%, the degree of polymerization is more than or equal to 800, the whiteness is more than or equal to 88% of ISO (international standardization organization), and the content of an acetone extract is less than or equal to 0.1%, so that the requirements for the acetified bamboo pulp can be met. The preparation process of the acetified bamboo pulp has the characteristics of small corrosion to production equipment, low energy consumption, environmental friendliness, stable quality, safety in production, stability, controllability and low cost, and can easily realize large-scale industrial production.

Description

technical field [0001] The invention relates to a method for producing acetate fiber pulp in the textile industry, in particular to a production process for preparing acetate grade bamboo pulp. Background technique [0002] Two important derivatives of cellulose, nitrocellulose and cellulose acetate, play a very important role in our daily life and industrial production. Nitrocellulose is mainly used in explosives and coatings, while cellulose acetate is more widely used. Cellulose acetate can be used in medicine, textiles, tobacco, liquid crystal materials, coatings, plastic products, etc., so its significance is becoming more and more obvious. Tobacco is the largest consumption of cellulose acetate. Before 1998, the technology of producing cellulose acetate tow for cigarettes was not yet mastered in China. The tow for cigarettes was mainly acrylic fiber tow, but the disadvantages of acrylic fiber were mainly poor elasticity, adsorption, and thermal stability were not as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/02D21C9/16D21C9/14
Inventor 吴和均曾自银吴和岭陈丙才
Owner 泰盛(江西)生活用品有限公司
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