CN102590124A - Screening method of surface active agent for cooking - Google Patents
Screening method of surface active agent for cooking Download PDFInfo
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- CN102590124A CN102590124A CN2012100376792A CN201210037679A CN102590124A CN 102590124 A CN102590124 A CN 102590124A CN 2012100376792 A CN2012100376792 A CN 2012100376792A CN 201210037679 A CN201210037679 A CN 201210037679A CN 102590124 A CN102590124 A CN 102590124A
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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
The present invention relates to the screening technique of a kind of boiling, belong to the Pulp and Paper Engineering technical field with surfactant.
Background technology
How to improve the selectivity of delignification, it is minimum that the degradation reaction of carbohydrates is controlled at, and improves the slurrying selectivity, obtains good economic benefit, all is the emphasis of pulp-making research all the time.The interpolation of digesting assistant is one of convenient mode at present.Digesting assistant can be realized through the accelerating delignification effect the raising of boiling efficiency on the one hand, can realize through the osmosis of acceleration cooking liquor to fibrous raw material on the other hand.When surfactant is used for digestion process as digesting assistant, then main through reducing the surface tension of soup and stock yard, impel raw material surface complete wetting; Accelerate the infiltration and the diffusion of soup; Quicken the speed of raw material delignification, improve the slurrying quality, realize the raising of boiling efficiency.
The first step of boiling is infiltration and diffusion, and alkaline cooking carries out in certain density soda bath, and the surface tension of NaOH solution is very high; Be difficult to be penetrated into fibrous inside,, help reducing the surface tension of solution so in digestion process, add surfactant; Increase the wetting ability of cooking liquor to raw material, the effect thereby the profit of the infiltration diffusion of acceleration cooking liquor and raw material rises can play a role cooking liquor fast and effectively; The performance of this effect then depends primarily on the improvement of surfactant to the cooking liquor wettability; So if can effectively screen with surfactant to boiling, then can improve the seepage velocity of cooking liquor, can practice thrift drug dosage again; Obtain optimum cooking effect, reduce the slurrying cost.In addition, in some digesting assistant prescription surfactant component is arranged,, can assess the prescription of better optimize digesting assistant equally the effect of wherein contained surfactant like green oxygen.
Present domestic related article, patent and the standard that boiling is screened with surfactant of also not seeing.In view of present surfactant applicable cases and the development prospect in digestion process with and to the improvement situation of cooking effect, the invention provides and a kind ofly utilize common spectral analysis to advance surfactant is carried out method for screening.
Summary of the invention
The purpose of this invention is to provide the screening technique of a kind of boiling with surfactant, this method is convenient feasible, simple to operate, and common experimental facilities and ultraviolet spectrometer (UVS) can be realized the screening of surfactant, and analysis result accurately, fast.
The technical scheme that the present invention deals with problems is the screening technique of a kind of boiling with surfactant, may further comprise the steps:
1. raw material is immersed in the cooking liquor by the liquor ratio requirement, behind the immersion 20min, in water-bath, be warming up to 100 ℃ under the normal pressure, handle 10min down for 100 ℃;
2. measure the volume V that cooking liquor immerses raw material, the dipping residual solution that takes a morsel is measured A material concentration C with ultraviolet spectrum at 334nm;
3. screen optimum boiling surfactant based on the value of C/V; The infiltration stripping capacity of the big more explanation cooking liquor of C/V is good more, promptly surfactant to the surface property of cooking liquor to improve effect good more, and then filter out optimum boiling surfactant.
Wherein, C/V refers to immerse in the raw material unit volume cooking liquor to the contribution of A material stripping quantity in the raw material.
In the screening technique according to the invention, the 1. middle raw material of step refers to the paper grade (stock) plant fiber material.
In the screening technique according to the invention, the measuring method that should understand the volume V that immerses raw material is the initial volume differences that adds cooking liquor volume and dipping residual solution.
In the screening technique according to the invention, preferred steps is typical curve fitting formula degree of correlation R >=0.9900 in the medium ultraviolet spectroscopic methodology test 2..
Stripping material A is the grease in the raw material; The material of fats such as wax; The dipping residual solution in stripping material A at 256nm, 281nm, there is absorption peak at the 334nm place; Be the interference of avoiding flooding anthraquinone in the residual solution and containing phenyl ring class surfactant, select for use 334nm as the lambda1-wavelength of measuring stripping material A content in the dipping residual solution.
In the screening technique according to the invention, preferred steps result of calculation 3. keeps two position effective digitals.
Principle of the present invention is: surfactant is added in the cooking liquor; Can reduce the surface tension of cooking liquor; Improve the perviousness of soup; Help the stripping of stripping material A in the raw material, the stripping of these materials is that passage is opened in the stripping of lignin in infiltration and the boiling delignification process of cooking liquor; So can in certain hour, get into the value of the leachable substance A of penetrating fluid of wood chip unit volume through the process of simulation boiling intensification, promptly the size of C/V is screened surfactant, the big more effect of C/V is good more.Screening technique utilizes simple experiment instrument and ultraviolet spectrum analyzer to realize, and is simple, convenient feasible, and the result is clear and be easy to analysis, quick and precisely.
The invention has the beneficial effects as follows: need not real boiling; Only can optimize through small amount of sample and simple cubing and ultra-violet analysis and optimum boiling with surfactant and consumption thereof, analytical approach is easy, and is simple to operate; The result is accurate, quick, and analysis cost is low.
The inventive method is beneficial to confirms suitable surfactant before boiling; Having avoided conventional surfactant to screen can only be through investigating the defective that slurry boiling situation realizes behind the mashing off; Help energy, soup and raw-material saving, realize energy-saving and environmental protection, the economy of surfactant screening; Boiling is beneficial to enterprise with the screening of surfactant and formulates corresponding digesting technoloy and optimum surfactant selection based on the actual conditions of raw material in addition; Realize that surfactant improves the maximization of cooking liquor penetrating power, realizes the acquisition of optimum cooking effect.
Embodiment
Following non-limiting example can make those of ordinary skill in the art more fully understand the present invention, but does not limit the present invention in any way.
Test method described in the following embodiment like no specified otherwise, is conventional method; Said reagent and material like no specified otherwise, all can obtain from commercial sources, or can the conventional method preparation.
Embodiment 1
In the band condensation reflux unit, (g: mL) immerse in the cooking liquor, the cooking liquor composition: alkali charge 16% was (with Na in 1: 4 by liquor ratio with poplar wood chip 20g
2The O meter), sulphidity 24% is (with Na
2O meter), anthraquinone 0.15% (to the over dry raw material), surfactant NP-40 0.05% (to the over dry raw material), behind the dipping 20min, 40min to 100 ℃ of intensification in water-bath handled 10min under 100 ℃ of conditions under the normal pressure.
Measure the volume 41mL that cooking liquor immerses raw material, and the dipping residual solution that takes a morsel carries out ultraviolet spectral analysis at 334nm, calculate according to the typical curve fitting formula and in dip process, ooze out amount of substance concentration 0.0706g/L, then C/V=1.72g/L
2
Embodiment 2
In the band condensation reflux unit, (g: mL) immerse in the cooking liquor, the cooking liquor composition: alkali charge 16% was (with Na in 1: 4 by liquor ratio with poplar wood chip 20g
2The O meter), sulphidity 24% is (with Na
2O meter), anthraquinone 0.15% (to the over dry raw material), surfactant A EO-9 0.05% (to the over dry raw material), behind the dipping 20min, 40min to 100 ℃ of intensification in water-bath handled 10min under 100 ℃ of conditions under the normal pressure.
Measure the volume 43mL that cooking liquor immerses raw material, the dipping residual solution that takes a morsel is carried out the A substance-measuring with ultraviolet spectrum at the 334nm place, calculates the concentration 0.0478g/L that in dip process, oozes out material, then C/V=1.11g/L according to the typical curve fitting formula
2
Find that relatively under the identical cooking schedule, different surface active agents is different to the improvement of cooking liquor osmotic effect.C/V ratio is big more, and the instruction card surface-active agent is big more to the raising of cooking liquor penetrating power, and promptly the ability of cooking liquor stripping material is big more; The abundant entering of cooking liquor; Stripping A amount of substance is many more, and then cooking effect is good more, helps the raising of stock quality more.From give an actual example and can find out, the NP-40 surfactant will obviously be superior to the AEO-9 surfactant to the improvement of cooking effect under this conditions of cooking.
Claims (3)
1. a boiling may further comprise the steps with the screening technique of surfactant:
1. raw material is immersed in the cooking liquor by the liquor ratio requirement, behind the immersion 20min, in water-bath, be warming up to 100 ℃ under the normal pressure, handle 10min down for 100 ℃;
2. measure the volume V that cooking liquor immerses raw material, and the dipping residual solution that takes a morsel is measured the concentration C of stripping material A at 334nm with ultraviolet spectrum;
3. screen optimum boiling according to the value of C/V and use surfactant, the infiltration stripping capacity of the bigger then cooking liquor of C/V is good more, uses surfactant thereby filter out optimum boiling.
2. boiling according to claim 1 is characterized in that with the screening technique of surfactant: the 2. middle typical curve fitting formula degree of correlation R of step >=0.9900.
3. boiling according to claim 1 is characterized in that with the screening technique of surfactant: step result of calculation 3. keeps two position effective digitals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210037679 CN102590124B (en) | 2012-02-17 | 2012-02-17 | Screening method of surface active agent for cooking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210037679 CN102590124B (en) | 2012-02-17 | 2012-02-17 | Screening method of surface active agent for cooking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102590124A true CN102590124A (en) | 2012-07-18 |
| CN102590124B CN102590124B (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210037679 Expired - Fee Related CN102590124B (en) | 2012-02-17 | 2012-02-17 | Screening method of surface active agent for cooking |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007023582A1 (en) * | 2005-08-23 | 2007-03-01 | Japan Science And Technology Agency | Standard sample for test and/or calibration of circular dichroism dispersion meter and uv-visible spectrophotometer |
| WO2008076055A1 (en) * | 2006-12-19 | 2008-06-26 | Akzo Nobel N.V. | Process of pulping |
-
2012
- 2012-02-17 CN CN 201210037679 patent/CN102590124B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007023582A1 (en) * | 2005-08-23 | 2007-03-01 | Japan Science And Technology Agency | Standard sample for test and/or calibration of circular dichroism dispersion meter and uv-visible spectrophotometer |
| WO2008076055A1 (en) * | 2006-12-19 | 2008-06-26 | Akzo Nobel N.V. | Process of pulping |
Non-Patent Citations (3)
| Title |
|---|
| 刘建容等: "添加表面活性剂KP法蒸煮液的渗透性能研究", 《四川理工学院学报(自然科学版)》 * |
| 姚春丽: "尾巨桉制浆工艺及机理研究", 《中国博士学位论文数据库（电子期刊）》 * |
| 董丽颖等: "几种重要蒸煮助剂的研究现状", 《黑龙江造纸》 * |
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| Publication number | Publication date |
|---|---|
| CN102590124B (en) | 2013-10-09 |
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