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Screening method of surface active agent for cooking

A technology of surfactant and screening method, which is applied in the field of pulp and paper engineering to achieve the effects of improving permeability, benefiting energy and reducing surface tension

Inactive Publication Date: 2013-10-09
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are no related articles, patents and standards on the screening of cooking surfactants in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a device with condensation and reflux, 20 g of poplar wood chips are immersed in the cooking liquid according to the liquid ratio of 1:4 (g: mL). The cooking liquid composition: the amount of alkali used is 16% (based on Na 2 O), degree of sulfide 24% (as Na 2 O), anthraquinone 0.15% (for absolute dry raw materials), surfactant NP-40 0.05% (for absolute dry raw materials), after soaking for 20min, heat up to 100°C in a water bath under normal pressure for 40min, and the condition of 100°C Under treatment for 10min.

[0023] Measure the volume 41mL of the cooking liquid immersed in the raw material, and take a small amount of impregnated residual liquid for ultraviolet spectrum analysis at 334nm. According to the standard curve fitting formula, the concentration of the exuded substance in the impregnation process is calculated as 0.0706g / L, then C / V=1.72g / L 2 .

Embodiment 2

[0025] In a device with condensation and reflux, 20 g of poplar wood chips are immersed in the cooking liquid according to the liquid ratio of 1:4 (g: mL). The cooking liquid composition: the amount of alkali used is 16% (based on Na 2 O), degree of sulfide 24% (as Na 2 O meter), anthraquinone 0.15% (for absolute dry raw materials), surfactant AEO-9 0.05% (for absolute dry raw materials), after soaking for 20min, heat up to 100°C in a water bath under normal pressure for 40min, and the condition of 100°C Under treatment for 10min.

[0026] Measure the volume 43mL of the cooking liquid immersed in the raw material, take a small amount of impregnated residual liquid and use ultraviolet spectroscopy to measure substance A at 334nm, and calculate the concentration of the exuded substance during the impregnation process as 0.0478g / L according to the standard curve fitting formula, then C / V=1.11g / L 2 .

[0027] By comparison, it was found that under the same cooking conditions, d...

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PUM

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Abstract

The screening of a surface active agent is beneficial to establishing the cooking technology, increasing the pulping efficiency and realizing the high-efficiency and energy-saving pulping. The invention relates to a screening method of a surface active agent for cooking, belonging to the field of pulping and paper-making engineering technology. The screening method utilizes the characteristic that the surface active agent can reduce the surface tension of cooked liquid medicine and screen the influence of the surface active agent on a cooking effect by measuring a ratio of penetrating fluid which enters a wood chip in a unit volume to a leachable substance A, namely the value of C / V. The method provided by the invention does not need cooking and can screen the optimal surface active agent for cooking by a common chemical and ultraviolet spectrum analysis method, is simple in operation and is convenient, practicable, fast, accurate and economical. The method is beneficial to establishing the optimal cooking technology and developing a cooking additive with good performances.

Description

technical field [0001] The invention relates to a screening method for cooking surfactants, belonging to the technical field of pulp and papermaking engineering. Background technique [0002] How to improve the selectivity of delignification, control the degradation reaction of carbohydrates to a minimum, improve the selectivity of pulping, and obtain good economic benefits have always been the focus of pulping research. The addition of cooking aids is one of the most convenient ways at present. The improvement of cooking efficiency by cooking aids can be achieved by accelerating delignification on the one hand, and by accelerating the penetration of cooking liquid on fiber raw materials on the other hand. When the surfactant is used as a cooking aid in the cooking process, it mainly reduces the surface tension between the liquid medicine and the raw material, promotes the complete wetting of the surface of the raw material, accelerates the penetration and diffusion of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33
Inventor 平清伟张健董丽颖石海强李娜牛梅红
Owner DALIAN POLYTECHNIC UNIVERSITY