CN104962389A - Solid alkali and method for synergetic deacidification and decoloration of illegal cooking oil by virtue of solid alkali - Google Patents
Solid alkali and method for synergetic deacidification and decoloration of illegal cooking oil by virtue of solid alkali Download PDFInfo
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- CN104962389A CN104962389A CN201510413499.3A CN201510413499A CN104962389A CN 104962389 A CN104962389 A CN 104962389A CN 201510413499 A CN201510413499 A CN 201510413499A CN 104962389 A CN104962389 A CN 104962389A
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- solid alkali
- sewer oil
- decoloration
- deacidification
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Abstract
The invention relates to the fields of oil and fat refining and processing and particularly relates to solid alkali and a method for synergetic deacidification and decoloration of illegal cooking oil by virtue of the solid alkali. According to the method, the illegal cooking oil is mainly taken as a processing object and is subjected to deacidification and decoloration by virtue of the compound solid alkali. The compound solid alkali consists of activated carbon and activated clay; on one hand, by virtue of the adsorption property of the prepared solid alkali, the solid alkali can be widely applied to the decoloration of illegal cooking oil of different sources and types by changing the raw material proportion of the solid alkali and the concentration of immersion treatment liquid; on the other hand, the deacidification and decoloration efficiency of the illegal cooking oil can be changed by controlling the processing temperature, the processing time and the consumption of the solid alkali, and therefore, optimal deacidification and decoloration effects of the illegal cooking oil are achieved. By virtue of a synergistic effect among compound supported alkalis, the deacidification and decoloration of the illegal cooking oil are simultaneously realized, and furthermore, the process has the characteristics of high deacidification and decoloration efficiency, high neutral oil yield and the like. The processed product can be absolutely used as a raw material for subsequent deep processing.
Description
Technical field
The present invention relates to oil and fat refining manufacture field, particularly a kind of solid alkali and utilize solid alkali realize sewer oil work in coordination with depickling decolouring method.
Background technology
Along with the raising of people's living standard, getting more and more of the grease that daily life and food processing enterprises are discarded.The oil slick of discharging after being mainly derived from catering industry processed food and cleaning tableware, the waste oil, animals and plants oil product tankage, acidifying grease etc. of fried food, be commonly called as sewer oil, hogwash fat or swill oil.Although the waste grease output of current China is huge, what do not have obtains fully rationally Collection and utilization.If directly these waste greases are entered water drain, not only to block, corrosion pipeline, and every kilogram of waste oil can make 15000 square metres of waters be polluted, and can cause the eutrophication of water body time serious.On the other hand, some illegal retailers for seeking exorbitant profit, by the waste grease of recovery through simply heating, removing slag, after the processes such as dehydration, sell as edible oil product, cause great harm to food safety and people ' s health.According to statistics, China at least produces 300-500 ten thousand tons of waste greases every year, and rationally recycling waste grease resource has become the extremely urgent problem of China's sustainable and healthy development.
Free fatty acids in separation removal waste grease and foreign pigment are treating processess important in process for carrying out pretreatment on waste oil.Existing depickling decoloring method is more, generally uses alkali refining method to remove free fatty acids respectively, uses carclazyte to remove foreign pigment.But these techniques do not reach good depickling or decolorizing effect on the one hand in the process of waste grease; Flow process is complicated on the other hand, has secondary pollution refuse and produces.
In recent years also occurred that some depicklings are decoloured new treatment process, as CN104450207 utilizes glycerine esterification method to reduce the acid number of sewer oil, although what this method free acid taken full advantage of in sewer oil was effective is converted into ester, and oleic acid value is reduced to 0.5mgKOH/g after making process, but the method condition is comparatively harsh, and need to carry out the last handling processes such as multistep rectifying separation to product; CN103589517 uses a kind of Magnesium Silicate q-agent material to carry out adsorption bleaching process to sewer oil, certain decolorizing effect can be reached, and in conjunction with the characteristic of Magnesium Silicate q-agent, acid number can be reduced to a certain extent, but removal effect is also not obvious, after process, acid value of oil and fat is still at more than 3.5mgKOH/g, cannot meet directly as the requirement of follow-up deep processing raw material.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, in order to solve the disposable process problem completing the depickling decolouring of sewer oil, proposing a kind of solid alkali and utilizing solid alkali to realize the method that sewer oil works in coordination with depickling decolouring.
Technical scheme of the present invention is:
The invention discloses a kind of solid alkali, described solid alkali with gac and atlapulgite for raw material, according to the mass fraction, gac 55-70 part, atlapulgite 30-45 part, after gac and the abundant ground and mixed of atlapulgite, add 500 parts of dilute hydrochloric acid, filter after stirring 1h, after distilled water flushing to neutrality, filter gained solid, take out after 105-110 DEG C of dry 2h in an oven, the gac of gained and atlapulgite mixture being added mass concentration is carry out dip treating in the NaOH solution of 10%-30%, stirring at room temperature 12h, after filtration, take out after dry 3h at filtration gained solid is placed in 105-110 DEG C, put into moisture eliminator cooling, obtain solid alkali.
Above gac and atlapulgite are commercially available prod.
Of the present invention another also discloses depickling decolouring worked in coordination with by above-mentioned solid alkali application for sewer oil.
3rd object of the present invention be openly a kind of utilize solid alkali realize sewer oil work in coordination with depickling decolouring method, concrete steps are:
(1) filter cleaner
The sewer oil reclaimed contains a large amount of solid residues, is removing insoluble impurities, first carries out mechanical filter process to sewer oil, remove most solid residue.
(2) distillation dehydration
Sewer oil after filtering stirs for some time at 105 DEG C, takes out to constant weight, is namely stripped of free water content contained in sewer oil.
(3) solid alkali process sewer oil
By the solid alkali prepared according to mass ratio (8-15): 100 add in sewer oil, abundant mix and blend, and temperature remains on 60-80 DEG C, and the treatment time controls at 20-40min.
(4) separating, washing
Filter the sewer oil after by process by vacuum pump to be separated with solid alkali, the process oil obtained uses distilled water wash 1-3 time, and the solid alkali after separation can be reused after washing.
The evaluation reference GB5530-2005 vegetable oil acid values determination method of acid removal rate detects, acid removal rate η
acalculation formula be:
Wherein A
0for processing the acid number of front waste grease, A
1for processing the acid number of rear waste grease.
The ultraviolet absorptivity measuring method of the evaluation reference GB/T 22500-2008 vegetables oil of percent of decolourization detects, and measures the maximum absorption band of waste grease at 320nm wavelength place with ultraviolet spectrophotometer.The ultraviolet absorptivity measuring method of the mensuration reference GB/T 22500-2008 vegetables oil of absorbancy detects, and take cyclohexane give as reference.Percent of decolourization η
bcalculation formula be:
Wherein B
0for processing the absorbancy of front waste grease, B
1for processing the absorbancy of rear waste grease.
The judgement criteria of free acid is acid number, just using acid removal rate as criterion after computing, foreign pigment complicated component, but the content of impurity is the absorbancy that can affect fixed substance, and impurity is fewer, absorbancy is less, the criterion therefore using percent of decolourization as foreign pigment removal effect.
Solid alkali disclosed by the invention is reusable, and its treatment process is as follows, by used solid alkali through washing with alcohol process, after 80 DEG C of heat dryings, adding mass concentration is in 10%-30%NaOH solution, stirring at room temperature 12h, filter, take out after 105-110 DEG C of dry 3h.
The invention has the beneficial effects as follows:
(1) characteristic of the gac that makes full use of of solid alkali of the present invention and atlapulgite, can adsorb opposed polarity, the impurity particle of different size simultaneously, thus reach good decolorizing effect.
(2) traditional technology can only be process respectively, and utilizes solid alkali to process sewer oil, can reach the effect of the decolouring of depickling simultaneously, and successful, meet the raw material as follow-up deep processing completely, save technical process, greatly reduce cost.
(3) treatment process neutral oil yield of the present invention is high, produces in the process of depickling decolouring without obvious neat soap.Solid alkali can reuse, whole process of the present invention is more efficient, economy, environmental protection (contrast as attached Fig. 1 and 2).
Accompanying drawing explanation
Accompanying drawing 1 is traditional sewer oil processing technological flow figure;
Accompanying drawing 2 is solid alkali processing technological flow figure of the present invention.
Embodiment
The specific embodiment of the present invention is as follows:
Embodiment 1
The basic preparation parameter of solid alkali #1 is: taking quality of activated carbon number is 60 parts, atlapulgite 40 parts, after gac and the abundant ground and mixed of atlapulgite, add 500 parts of dilute hydrochloric acid, filter after stirring 1h, with distilled water flushing to neutral, take out after 105-110 DEG C of dry 2h, it is in 10%NaOH solution that the gac of gained and atlapulgite mixture are added the dip treating liquid concentration prepared, stirring at room temperature 12h, filters to obtain solid alkali, is placed in baking oven and takes out after dry 3h at 105-110 DEG C, put into moisture eliminator cooling, for subsequent use.
By sewer oil #1 through filtering, distilling process, remove solid residue and moisture, take the sewer oil that 100kg distills process after filtration, add the solid alkali #1 of 15kg, under temperature 70 C, stir process 30min, after filtering separation solid alkali and process oil, make to wash with water 3 process oil.
Table 1 is the parameter lookup table of sewer oil before and after process in embodiment 1
| Sewer oil before process | Sewer oil after process | Acid removal rate | |
| Acid number | 1.80mgKOH/g | 0.16mgKOH/g | 91.11％ |
| Absorbancy | 0.314 | 0.142 | 54.77％ |
Embodiment 2
By sewer oil #2 through filtering, distilling process, remove solid residue and moisture, take the sewer oil that 100kg distills process after filtration, add the solid alkali #1 (as prepared in embodiment 1) of 15kg, under temperature 70 C, stir process 30min, after filtering separation solid alkali and process oil, makes to wash with water 3 process oil.
Table 2 is the parameter lookup table of sewer oil before and after process in embodiment 2
| Sewer oil before process | Sewer oil after process | Acid removal rate | |
| Acid number | 27.20mgKOH/g | 3.56mgKOH/g | 86.91％ |
| Absorbancy | 0.434 | 0.257 | 41.01％ |
Embodiment 3
The basic preparation parameter of solid alkali #2 is: quality of activated carbon number is 65 parts, atlapulgite 35 parts of parts, after gac and the abundant ground and mixed of atlapulgite, add 500 parts of dilute hydrochloric acid, filter after stirring 1h, with distilled water flushing to neutral, take out after 105-110 DEG C of dry 2h, it is in 20%NaOH solution that the gac of gained and atlapulgite mixture are added the dip treating liquid concentration prepared, stirring at room temperature 12h, after filtration, takes out after dry 3h at solid alkali being placed in 105-110 DEG C, put into moisture eliminator cooling, for subsequent use.
By sewer oil #2 through filtering, distilling process, remove solid residue and moisture, take the sewer oil that 100kg distills process after filtration, add the solid alkali #2 of 10kg, at temperature 80 DEG C, stir process 20min, after filtering separation solid alkali and process oil, make to wash with water 3 process oil.
Table 3 is the parameter lookup table of sewer oil before and after process in embodiment 3
| Sewer oil before process | Sewer oil after process | Acid removal rate | |
| Acid number | 27.20mgKOH/g | 0.82mgKOH/g | 96.98％ |
| Absorbancy | 0.434 | 0.215 | 50.46％ |
Embodiment 4
The basic preparation parameter of solid alkali #3 is: by used solid alkali #1 (as prepared in embodiment 1) through washing with alcohol process, gained solid mixture is after 80 DEG C of heat dryings, it is in 10%NaOH solution that the gac of gained and atlapulgite mixture are added the dip treating liquid concentration prepared, stirring at room temperature 12h, filter to obtain solid alkali, be placed in baking oven and take out after dry 3h at 105-110 DEG C, put into moisture eliminator cooling, for subsequent use.
By sewer oil #1 through filtering, distilling process, remove solid residue and moisture, take the sewer oil that 100g distills process after filtration, add the solid alkali 3 of 15g, under temperature 60 C, stir process 40min, after filtering separation solid alkali and process oil, make to wash with water 3 process oil.
Table 4 is the parameter lookup table of sewer oil before and after process in embodiment 4
| Sewer oil before process | Sewer oil after process | Acid removal rate | |
| Acid number | 1.80mgKOH/g | 0.25mgKOH/g | 86.11％ |
| Absorbancy | 0.314 | 0.199 | 36.62％ |
According to preparation method and the operational condition of embodiment 4 solid alkali, solid alkali being cycled to repeat use, is below the experimental result of each cycle index.
| Cycle index | Acid removal rate | Percent of decolourization |
| 0 | 91.11 | 54.77 |
| 1 | 86.11 | 41.25 |
| 2 | 70.20 | 36.62 |
| 3 | 55.56 | 30.00 |
| 4 | 52.45 | 22.74 |
| 5 | 50.50. | 17.58 |
| 6 | 51.26 | 15.46 |
| 7 | 51.73 | 14.20 |
| 8 | 50.35 | 14.18 |
Above-described several embodiment is only in order to illustrate the technical scheme of this invention and unrestricted, and any those skilled in the art can utilize disclosed above technology contents to be changed or be modified as the Equivalent embodiments of equivalent variations.In every case be for departing from technical solution of the present invention content; according to technical spirit of the present invention to any simple modification made for any of the above embodiments; such as change solid alkali raw material types, ratio, consumption; dip treating liquid concentration; treatment temp; the change in treatment time etc. or remodeling, still belong to the protection domain of technical solution of the present invention.
Claims (8)
1. a solid alkali, it is characterized in that, described solid alkali with gac and atlapulgite for raw material, according to the mass fraction, gac 55-70 part, atlapulgite 30-45 part, after gac and the abundant ground and mixed of atlapulgite, add 500 parts of dilute hydrochloric acid, filter after stirring 1h, after distilled water flushing to neutrality, filter gained solid, take out after 105-110 DEG C of dry 2h in an oven, the gac of gained and atlapulgite mixture being added mass concentration is carry out dip treating in the NaOH solution of 10%-30%, stirring at room temperature 12h, after filtration, take out after dry 3h at filtration gained solid is placed in 105-110 DEG C, put into moisture eliminator cooling, obtain solid alkali.
2. a solid alkali is used for the application that sewer oil works in coordination with depickling decolouring.
3. utilize solid alkali realize sewer oil work in coordination with depickling decolouring a method, it is characterized in that, by solid alkali according to mass ratio (8-15): 100 add in sewer oil, abundant mix and blend, temperature 60-80 DEG C, treatment time 20-40min.
4. according to claim 3 utilize solid alkali realize sewer oil work in coordination with depickling decolouring method, it is characterized in that, before carrying out utilizing solid alkali process sewer oil, also comprise pretreatment process, described pretreatment process is filter cleaner and distillation dehydration.
5. according to claim 3 utilize solid alkali realize sewer oil work in coordination with depickling decolouring method, it is characterized in that, after carrying out utilizing solid alkali process sewer oil, also comprise separating, washing.
6. according to claim 4 utilize solid alkali realize sewer oil work in coordination with depickling decolouring method, it is characterized in that, described distillation dehydration condition be at 105 DEG C stirring.
7. utilize solid alkali to realize method that sewer oil works in coordination with depickling decolouring according to claim 5, is characterized in that, the mode that described separating, washing adopts vacuum pump to filter.
8. the reusable treatment process of solid alkali according to claim 1, is characterized in that, by used solid alkali through washing with alcohol process, after 80 DEG C of heat dryings, adding mass concentration is in 10%-30%NaOH solution, stirring at room temperature 12h, filter, take out after 105-110 DEG C of dry 3h.
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| CN201510413499.3A CN104962389B (en) | 2015-07-15 | 2015-07-15 | Solid base and the method for realizing gutter oil collaboration depickling decoloration using solid base |
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| CN106883931A (en) * | 2015-12-15 | 2017-06-23 | 中粮集团有限公司 | A kind of method that depickling is carried out to grease |
| CN107384587A (en) * | 2017-09-21 | 2017-11-24 | 武汉市农业科学技术研究院林业果树科学研究所 | A kind of acid stripping method of cold press peony seed oil |
| CN108485810A (en) * | 2018-04-11 | 2018-09-04 | 安徽德运粮油有限公司 | The ultrasonic wave auxiliary refining method of one vegetable oil |
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