CN109337650A - A kind of low-corrosiveness snow melt liquid and preparation method - Google Patents
A kind of low-corrosiveness snow melt liquid and preparation method Download PDFInfo
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- CN109337650A CN109337650A CN201811524528.3A CN201811524528A CN109337650A CN 109337650 A CN109337650 A CN 109337650A CN 201811524528 A CN201811524528 A CN 201811524528A CN 109337650 A CN109337650 A CN 109337650A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
- C09K3/185—Thawing materials
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Abstract
The invention discloses a kind of preparation methods of low-corrosiveness snow melt liquid, it including the following steps: step A: matched by weight, taking pH value is 1 ~ 2 mother liquor 100kg, and the calcium hydroxide of 6 ~ 7kg is added into mother liquor, obtains the middle aqueous mother liquor that pH value is 6.5 ~ 7.5；Step B: after the middle aqueous mother liquor in step A is squeezed into wastewater disposal basin standing a period of time, layering mother liquor is obtained；Step C: obtaining clear liquid for the upper layer mother liquor in step B after filter cloth is filtered, then the active carbon of 500 ~ 2000g of addition decolourizes in the supernatant liquor, obtains suspension；Step D: being added calcium chloride and potassium chloride in the suspension in step C, then after filter cloth is filtered, then with the clear liquid that PP cotton filter element machine is obtained by filtration is snow melt liquid.It is an object of the present invention to provide a kind of low-corrosiveness snow melt liquid and preparation methods, prepare low-corrosiveness snow melt liquid as raw material using the mother liquor after Chinese gall production gallic acid crystallization, weak to steel corrosion, small to phytotoxicity.
Description
Technical field
The invention belongs to deicing salt applied technical field, specially a kind of low-corrosiveness snow melt liquid and preparation method.
Background technique
Currently, still use Nacl snow melt mostly both at home and abroad, it is next tight to road surface, bridge and vegetational zone after Nacl snow melt
It endangers again.According to relevant report, the Nacl snow melt of somewhere winter is more due to using, and causes part way Nacl excessive, leads
Cause road tree on both sides of the road and grass be withered, which is because, soil salt is excessively high, keep plant absorption moisture difficult, last plant by
Moisture is not absorbed and withered in long-time.In addition, salt can also promote metal that electrochemical corrosion occurs, accelerate steel bar corrosion.With
The development of national economy, the highway construction in China is fast-developing, and highway transport volume increases year by year, so low corrosion environment-friendly type is melted
The research for avenging agent is extremely urgent.
According to analysis, the research of highway environment-friendly snowmelt agent is very extensive at present, and the raw material being related to is also very much, such as: organic sylvite
Salt, papermaking wastewater etc., eventually because of starving, production cost is excessively high or brings other pollutions etc. and does not form industry；Market
Some upper products are the damage for reducing road pavement, also have calcium chloride antirust agent application, corruption of these products to reinforcing bar is added
Erosion decreases, but greatly increases the cost of deicing salt, and also some antirust agent are bigger to the toxicity of plant, it is difficult to big face
Product is promoted.
Chinese gall suitable growth is in the mountain area and hills of warm and moist.China main producing region concentrate on Guizhou, Sichuan, Hubei,
6 province such as Hunan, Shaanxi, Yunnan, these Gallnut yields saved account for about 90% or more of national total output.It is gallic mainly at
It is divided into tannic acid, is the primary raw material for extracting gallic acid.The applicant is located at just " Guizhou Province Yunnan portal ", " full Chu since ancient times
The Huaihua of the title of throat ", locality abound with Chinese gall, therefore have the company of more operation Chinese gall Related products, however, Chinese gall
A large amount of brown color waste liquids can be generally generated in production process, 1 ton of gallic acid of every production about generates 4.5 tons of waste liquids, mainly ties
The mother liquor formed after crystalline substance, containing 1.2% or so gallic acid, 6% or so sodium chloride, 6% or so glucose also contains
There are 0.3% or so tannic acid, ellagic acid etc., gallic acid is minimum to the toxicity of human body, but if these waste liquids are directly outer
Row, gallic acid will be combined into ink black complex compound with the ferrous ion in water or in soil, lead to water body and soil blackening.
It is worth noting that, gallic acid finished product has obtained good application effect for antirust on warship, if being produced waste water
For producing snow melt liquid, which just has the function of that bridge reinforcement is protected not corroded by salt, therefore, how to utilize the mother liquor
The snow melt liquid for developing a kind of low corrosion environment-friendly type, at a kind of technical problem urgently to be resolved.
Summary of the invention
The purpose of the present invention is in view of the above problems, provide a kind of preparation method of low-corrosiveness snow melt liquid, it include with
Under several steps:
Step A: being matched by weight, and taking pH value is 1 ~ 2 mother liquor 100kg, and the calcium hydroxide of 6 ~ 7kg is added into mother liquor,
It is neutralized, obtains the middle aqueous mother liquor that pH value is 6.5 ~ 7.5；
Step B: after the middle aqueous mother liquor in step A is squeezed into wastewater disposal basin standing a period of time, layering mother liquor is obtained；
Step C: the upper layer mother liquor in step B is obtained into clear liquid after filter cloth is filtered, then is added 500 in the supernatant liquor
The active carbon of ~ 2000g decolourizes, and obtains suspension；
Step D: being added calcium chloride and potassium chloride, then after filter cloth is filtered in the suspension in step C, then is filtered with PP cotton
The clear liquid that core machine is obtained by filtration is snow melt liquid.
Further, the middle aqueous mother liquor in the step B is squeezed into wastewater disposal basin standing 30 days or more.
Further, the calcium chloride of total weight 10 ~ 30% is added in the step D and the potassium chloride of total weight 5 ~ 15% obtains
The calcium chloride of mother liquor 10 ~ 30% and 5 ~ 15% potassium chloride mixed liquor.
Further, the mesh number of filter cloth is 350 in the step C.
Further, the filtering accuracy of the PP cotton filter element machine in the step D is 1 micron.
According to a kind of above-mentioned snow melt liquid that the preparation method of low-corrosiveness snow melt liquid obtains, including following ingredients by weight hundred
Divide than meter: tannic acid 0.2-0.6%, gallic acid 0.8-1%, glucose 4-6%, sodium chloride 6-8%, potassium chloride 5-15%, calcium chloride
10-30%, remaining is water.
Further, including following ingredients by weight percentage: tannic acid 0.25%, gallic acid 0.9%, glucose
4.5%, sodium chloride 7%, potassium chloride 10%, calcium chloride 12.5%, remaining is water.
A kind of application method of low-corrosiveness snow melt liquid, snow melt liquid is drawn into sprinkling truck, with the movement on sprinkling truck,
Snow melt is carried out to road by the way of spraying.
Beneficial effects of the present invention: low-corrosiveness is prepared as raw material using the mother liquor after Chinese gall production gallic acid crystallization and is melted
Liquid is avenged, it is weak to the steel corrosion in road, bridge, it is at low cost to the small toxicity of plant, adapt to environmental requirement.
1, in step A of the present invention, the mother liquor that Chinese gall produces after gallic acid crystallization is in highly acid, and hydrogen-oxygen is added thereto
Change calcium to be to adjust pH value, until being neutralized to neutrality, removes phosphate radical, sulfate radical and plasma, effectively convenient for organic matter
Sedimentation.
2,30 days are stood in step B of the present invention, the suspended matter in mother liquor starts to be layered under conditions of standing, allows tiny
Particle is agglomerated together by interacting, and forms larger particles, and then bulky grain is united again, forms floc sedimentation, and the two is made jointly
With the stratification of suspended matter in aqueous mother liquor in this is realized, to realize the sedimentation of suspended matter, it is convenient for filter cloth centering aqueous mother liquor
The separation of middle suspended matter large particulate matter.
3, in step D of the present invention, calcium chloride and potassium chloride will be added in supernatant liquor, calcium chloride be it is a kind of by chlorine element and
The salt that calcium constituent is constituted, hygroscopicity is extremely strong, is exposed in air and easily deliquesces, and facilitates the dissolution of accumulated snow and soluble easily in water, together
When release a large amount of heat, and because freezing point is lower, has been dissolved in snow-broth and be just difficult to re-form ice cube after salt, to be conducive to
Row's snow, potassium chloride is also such.
4, in step D of the present invention, using PP cotton filter element machine filtering be in order to remove remaining suspended matter in mother liquor mixed liquor,
Bulky grain, guarantee finally obtain the pure of snow melt liquid, substantially reduce the COD content in mother liquor.
5, the snow melt liquid in the present invention is easy to use, and for solid deicing salt, liquid snow melt liquid is in practical application
In have great advantage, without packaging bag, without dismantling packaging bag, without manually shedding, without above unloading goods, in addition, snow melt
Use cost is greatly saved in liquid, reduces labor intensity.
6, tannic acid, gallic acid etc. react to form one layer of fine and close protective film with Oxidation Process On Fe-surface object in the present invention, from
And completely cut off metal and empty gas and water, salt, it prevents electrochemical metal from corroding, plays the role of slowing down steel corrosion.
7, the snow melt liquid in the present invention can use pump sucking sprinkling truck, and snow melt liquid is uniformly sprayed onto snow face with atomizers spray
On, it realizes the effect for quickly eliminating accumulated snow crystalline state, prevents automobile from skidding in snow face.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below to specific reality of the invention
The mode of applying elaborates.In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.But this
Invention can be implemented in many other ways than those described herein, and those skilled in the art can be without prejudice to the present invention
Similar improvement is done in the case where intension, therefore the present invention is not limited to the specific embodiments disclosed below.
Embodiment one:
A kind of preparation method of low-corrosiveness snow melt liquid, is prepared by following steps:
Step A: after taking Chinese gall production gallic acid crystallization, the mother liquor 100kg that pH value is 1 is matched by weight, is added
The calcium hydroxide of 7kg is neutralized into mother liquor, obtains the middle aqueous mother liquor that pH value is 7.5；
Step B: after the middle aqueous mother liquor in step A is squeezed into wastewater disposal basin standing 30 days, layering mother liquor is obtained；
Step C: the upper layer mother liquor in step B is obtained into clear liquid after 350 mesh filter clothes are filtered, then in the supernatant liquor
The active carbon of 500g is added, obtains suspension；
Step D: the calcium chloride of total weight 20% and 5% potassium chloride are added in the suspension in step C, then through 350 mesh filter clothes
It after being filtered, then be the clear liquid that 1 micron of PP cotton filter element machine is obtained by filtration with filtering accuracy is snow melt liquid.
The low-corrosiveness snow melt liquid being prepared according to above step, including following ingredients are by weight percentage: tannin
Sour 0.25%, gallic acid 0.9%, glucose 4.5%, sodium chloride 7%, potassium chloride 5%, calcium chloride 26.5%, remaining is water.
Embodiment two:
A kind of preparation method of low-corrosiveness snow melt liquid, is prepared by following steps:
Step A: after taking Chinese gall production gallic acid crystallization, the mother liquor 100kg that pH value is 2 is matched by weight, is added
The calcium hydroxide of 6kg is neutralized into mother liquor, obtains the middle aqueous mother liquor that pH value is 6.5；
Step B: after the middle aqueous mother liquor in step A is squeezed into wastewater disposal basin standing 40 days, layering mother liquor is obtained；
Step C: the upper layer mother liquor in step B is obtained into clear liquid after 350 mesh filter clothes are filtered, then in the supernatant liquor
The active carbon of 2000g is added, obtains suspension；
Step D: the calcium chloride of total weight 5% and 15% potassium chloride are added in the suspension in step C, then through 350 mesh filter clothes
It after being filtered, then be the clear liquid that 1 micron of PP cotton filter element machine is obtained by filtration with filtering accuracy is snow melt liquid.
The low-corrosiveness snow melt liquid being prepared according to above step, including following ingredients are by weight percentage: tannin
Sour 0.6%, gallic acid 0.8%, glucose 5%, sodium chloride 6%, potassium chloride 15%, calcium chloride 11%, remaining is water.
Embodiment three:
A kind of preparation method of low-corrosiveness snow melt liquid, is prepared by following steps:
Step A: after taking Chinese gall production gallic acid crystallization, the mother liquor 100kg that pH value is 1.4 is matched by weight, is added
The calcium hydroxide of 6.5kg is neutralized into mother liquor, obtains the middle aqueous mother liquor that pH value is 7；
Step B: after the middle aqueous mother liquor in step A is squeezed into wastewater disposal basin standing 35 days, layering mother liquor is obtained；
Step C: the upper layer mother liquor in step B is obtained into clear liquid after 350 mesh filter clothes are filtered, then in the supernatant liquor
The active carbon of 1000g is added, obtains suspension；
Step D: the calcium chloride of total weight 10% and 10% potassium chloride are added in the suspension in step C, then through 350 mesh filter clothes
It after being filtered, then be the clear liquid that 1 micron of PP cotton filter element machine is obtained by filtration with filtering accuracy is snow melt liquid.
The low-corrosiveness snow melt liquid being prepared according to above step, including following ingredients are by weight percentage: tannin
Sour 0.5%, gallic acid 1%, glucose 5%, sodium chloride 8%, potassium chloride 10%, calcium chloride 16%, remaining is water.
The snow melt liquid being prepared using above-mentioned preparation method carries out the following terms comparative test:
Test A: snow melt liquid setting rate test experiments
100 milliliters of saturated sodium chloride solutions, 100 milliliters of saturation calcium chloride are added in experiment content in the conical flask of unified specification
Solution, 100 milliliters of mother liquor calcium chloride saturated solutions (excessive calcium chloride is only added in preparation step D to saturation), 100 milliliters
(excessive potassium chloride is only added to saturation) in mother liquor saturated potassium chloride solution in preparation step D, 100 milliliters of 20% chlorinations of mother liquor
+ 15% potassium chloride liquid of calcium (is incorporated as+15% potassium chloride of 20% calcium chloride of total weight) simultaneously i.e. in preparation step D, then by these
Conical flask equipped with above-mentioned solution is respectively put into the freezing chamber that test temperature is -24 DEG C and is tested, and records in each conical flask
Start to freeze to the time needed for complete freeze.
1 snow melt liquid setting rate test experiments table of table
+ 15% potassium chloride liquid of 20% calcium chloride of mother liquor icing rate under conditions of -24 DEG C of temperature is most slow as can be seen from Table 1,
Freezing tolerance is most strong.
Test B: corrosion rate test experience of the snow melt liquid to screw-thread steel
Laboratory apparatus is FA1004 assay balance, and test condition is room temperature, static state, the method for half leaching.Experimental method is weight-loss method,
Iron rust, the greasy dirt that screw-thread steel is removed to surface, put in a drying box.It weighs after drying, is accurate to a ten thousandth gram, advised unified
600 milliliters of saturated sodium chloride solutions, 600 milliliters of saturation calcium chloride solutions, 600 milliliters of mothers are separately added into the beaker that lattice are 1 liter
Chlorination processes calcium saturated solution (excessive calcium chloride is only added in preparation step D to saturation), 600 milliliters of mother liquor potassium chloride saturations
(excessive potassium chloride is only added to saturation) in liquid in preparation step D, 600 milliliters of+15% potassium chloride liquids of 20% calcium chloride of mother liquor
(i.e. in preparation step D be incorporated as simultaneously+15% potassium chloride of 20% calcium chloride of total weight) has been respectively put into 3 in each beaker
The screw-thread steel of weighing, experimental period are 10 days, and iron rust is removed after test and is re-weighed, experimental result is shown in Table 2:
2 snow melt liquid of table compares the corrosion rate data of screw-thread steel
Mother liquor has good slow release effect to the corrosion of screw-thread steel as can be seen from Table 2.
Test C: damage test experiments of the snow melt liquid to plant
Snow melt liquid and Nacl of the present invention have been carried out to lawn poison in Hunan benefit agriculture Chinese gall industry development Co., Ltd on-site
Property experiment, experimental period: on March 22nd, 2017, careless very delicate, the experiment content more sensitive to noxious material in early spring: point
Not by sodium chloride saturated solution ,+15% potassium chloride liquid of 20% calcium chloride of mother liquor dilutes 10 times, the lawn for being 60CM × 60CM to area
1 liter of solution of upper sprinkling, respectively sprinkling is primary after morning, noon, supper, sprays 3 times altogether.After 3 days, the small of sodium chloride solution is sprayed
Some curlings of careless partial blade, are similar to dehydration, and the small grass of sprinkling+15% potassium chloride liquid of 20% calcium chloride of mother liquor does not find obviously existing
As there is no significant difference with the green surface phenomenon that do not test, after 2 months, spraying the lawn of sodium chloride solution, careless rising trend is not
It is good, it is partially yellow.And the small careless growing state for spraying+15% potassium chloride liquid of 20% calcium chloride of mother liquor is good.Specific test content is as follows:
Respectively by saturated sodium chloride solution ,+15% potassium chloride liquid of 20% calcium chloride of mother liquor dilutes what 10 times of past 3 growing ways were not much different
500 milliliters of liquid are sprayed on rape, respectively spray primary, the growing state of observation of plant, test result after morning, noon, supper
Be spray+15% potassium chloride liquid of 20% calcium chloride of mother liquor growth of rape it is all right, 3 rapes for spraying sodium chloride solution go out
Existing tip burn on leaf.
Test D: breaking test of the snow melt liquid to concrete structure road surface
Respectively with+15% potassium chloride liquid of 20% calcium chloride of mother liquor (i.e. in preparation step D simultaneously be incorporated as 20% calcium chloride of total weight+
15% potassium chloride) 5 times of dilutions, 5 times of dilutions of industrial salt saturated solution compare:
Experimental subjects be 42.5 ordinary portland cements, after final set 28 days, seep bubble the time be 10 days, taking-up drain after, to its into
Row stress test, experimental result are as shown in table 3 below:
Breaking test data comparison of the 3 snow melt liquid of table to concrete structure road surface
The above table 3 is it can be seen that snow melt liquid is significantly less than directly caused by Nacl the extent of the destruction on concrete structure road surface
Damage program.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.
Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above example
It is merely used to help understand method and its core concept of the invention.The above is only a preferred embodiment of the present invention, it answers
When pointing out due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the common skill of the art
For art personnel, without departing from the principle of the present invention, several improvement, retouching or variation can also be made, can also incited somebody to action
Above-mentioned technical characteristic is combined in the right way；These improve retouching, variation or combination, or the not improved structure by invention
Think and technical solution directly applies to other occasions, is regarded as protection scope of the present invention.
Claims (8)
1. a kind of preparation method of low-corrosiveness snow melt liquid, which is characterized in that it including the following steps:
Step A: being matched by weight, and taking pH value is 1 ~ 2 mother liquor 100kg, and the calcium hydroxide of 6 ~ 7kg is added into mother liquor,
It is neutralized, obtains the middle aqueous mother liquor that pH value is 6.5 ~ 7.5；
Step B: after the middle aqueous mother liquor in step A is squeezed into wastewater disposal basin standing a period of time, layering mother liquor is obtained；
Step C: the upper layer mother liquor in step B is obtained into clear liquid after filter cloth is filtered, then is added 500 in the supernatant liquor
The active carbon of ~ 2000g decolourizes, and obtains suspension；
Step D: being added calcium chloride and potassium chloride, then after filter cloth is filtered in the suspension in step C, then is filtered with PP cotton
The clear liquid that core machine is obtained by filtration is snow melt liquid.
2. a kind of preparation method of low-corrosiveness snow melt liquid according to claim 1, which is characterized in that in the step B
Middle aqueous mother liquor stand 30 days or more.
3. a kind of preparation method of low-corrosiveness snow melt liquid according to claim 1, which is characterized in that in the step D
The potassium chloride of calcium chloride and total weight 5 ~ 15% that total weight 10 ~ 30% is added obtains the calcium chloride and 5 ~ 15% of mother liquor 10 ~ 30%
Potassium chloride mixed liquor.
4. a kind of preparation method of low-corrosiveness snow melt liquid according to claim 1, which is characterized in that in the step C
The mesh number of filter cloth is 350.
5. a kind of preparation method of low-corrosiveness snow melt liquid according to claim 1, which is characterized in that in the step D
PP cotton filter element machine filtering accuracy be 1 micron.
6. the snow melt obtained using a kind of preparation method of low-corrosiveness snow melt liquid described in any one of claim 1-5
Liquid, which is characterized in that mainly by weight percentage including following ingredients: tannic acid 0.2-0.6%, gallic acid 0.8-1%, Portugal
Grape sugar 4-6%, sodium chloride 6-8%, potassium chloride 5-15%, calcium chloride 10-30%, remaining is water.
7. a kind of low-corrosiveness snow melt liquid according to claim 6, which is characterized in that including following ingredients percentage by weight
Than meter: tannic acid 0.25%, gallic acid 0.9%, glucose 4.5%, sodium chloride 7%, potassium chloride 10%, calcium chloride 12.5%, remaining
For water.
8. a kind of application method of low-corrosiveness snow melt liquid according to claim 6, which is characterized in that suck snow melt liquid
Into sprinkling truck, with the movement on sprinkling truck, snow melt is carried out to road by the way of spraying.
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| CN107338025A (en) * | 2017-07-05 | 2017-11-10 | 吉林大学 | A kind of preparation method of high-performance environment protection type Snow Agent |
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2018
- 2018-12-13 CN CN201811524528.3A patent/CN109337650B/en active Active
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| CN1657586A (en) * | 2005-03-18 | 2005-08-24 | 大连民族学院 | Environmental protection snow melt agent and preparation method thereof |
| CN101671539A (en) * | 2008-09-11 | 2010-03-17 | 上海市长宁区少年科技指导站 | Snowmelt agent |
| CN105131984A (en) * | 2015-07-07 | 2015-12-09 | 大连民族大学 | Continuous reproduction technology using biomass wastes and waste liquid |
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