CN106867546A - Lignosulfonates polyvinyl alcohol blending coating soil conditioner and preparation method thereof - Google Patents
Lignosulfonates polyvinyl alcohol blending coating soil conditioner and preparation method thereof Download PDFInfo
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- CN106867546A CN106867546A CN201710178262.0A CN201710178262A CN106867546A CN 106867546 A CN106867546 A CN 106867546A CN 201710178262 A CN201710178262 A CN 201710178262A CN 106867546 A CN106867546 A CN 106867546A
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- C—CHEMISTRY; METALLURGY
- 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
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
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- C—CHEMISTRY; METALLURGY
- 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
- C09K2101/00—Agricultural use
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention relates to a kind of lignosulfonates polyvinyl alcohol blending coating soil conditioner and preparation method thereof, the lignosulfonates polyvinyl alcohol blending coating soil conditioner includes calcareous modifying agent and the coating being coated on the outside of the calcareous modifying agent, and the coating includes the raw material of following weight portion：2 10 parts of lignosulfonates, 9 11 parts of polyvinyl alcohol, 2 10 parts of urea, 1 10 parts of formaldehyde, 48 52 parts of water.Lignosulfonates polyvinyl alcohol blending coating soil conditioner obtained by the present invention can be applied to the acid improvement of cultivated soil and Heavy Metal Pollution Control, not only safety is without hidden danger, mitigate the stimulation and injury to user, it is easy to the transport of lime material, and its effect for improving acid soil is better than direct liming material.
Description
Technical field
The invention belongs to soil conditioner manufacture field, and in particular to a kind of lignosulfonates-polyvinyl alcohol blending bag
Film soil conditioner and preparation method thereof.
Background technology
Soil is an essential part in environment for human survival, is the material base of grain-production safety, soil matter
The existence of the amount regulation and control direct relation mankind and health.At present, China's arable soil manifests acidification trend.Meanwhile, as science and technology is sent out
Applying etc. for exhibition, the discharge of trade waste, the discarding of municipal refuse and agrochemical makes the Heavy Metal Pollution day of soil
It is beneficial serious.These not only break up soil system, influence plant growth and yield, and also produce greatly danger to the healthy of the mankind
Evil.
At present, liming class alkaline matter is improved soil acid-base value and reduces heavy metal pollution common method.But stone
Ash puts thermal property due to its water suction, and inconvenience is often resulted in during transport and use, can also produce injury to human body.Reduce
One effective way of lime and water touch opportunity, is exactly wrapped up lime particle using coating substance, so as to reach every
The purpose that exhausted lime is contacted with water, is readily transported and used.
It is reported that, rarely have research to the problem that calcareous modifying agent carries out coating at present, related is generally outside fertilizer
Coating is carried out, if the blending coating solution that will directly be applied to chemical fertilizer is wrapped in calcareous modifying agent outside, occurs that formula is easy
The shortcoming given away secrets, and then there is the phenomenons such as leakage, coating effect being influenceed, can still there is a problem of injuring human body potential safety hazard,
Even if not there is leakage phenomenon, can also there is the blending coating solution for being applied to chemical fertilizer with calcareous modifying agent generation chemistry instead
Should, reducing product improves the effect of soil acidity, and is currently used for the blending coating solution mostly chemical products of fertilizer, and cost is held high
It is expensive, do not meet the route of sustainable development.
The content of the invention
In view of this, it is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of lignosulfonates-poly- second
Enol blending coating soil conditioner and preparation method thereof, the lignosulfonates-polyvinyl alcohol blending bag obtained by the present invention
Film soil conditioner can be applied to the acid improvement of cultivated soil and Heavy Metal Pollution Control, and not only safety is without hidden danger, and it is right to mitigate
The injury of user, is easy to the transport of lime material, and its effect for improving acid soil is better than direct liming
Material.
To realize object above, the present invention is adopted the following technical scheme that：
A kind of lignosulfonates-polyvinyl alcohol blending coating soil conditioner, including calcareous modifying agent and be coated on
Coating on the outside of the calcareous modifying agent, the coating includes the raw material of following weight portion：Lignosulfonates 2-10 parts, it is poly-
Vinyl alcohol 9-11 parts, urea 2-10 parts, formaldehyde 1-10 parts, water 48-52 parts.
The present invention uses to be wrapped in lignosulfonates-polyvinyl alcohol on the outside of calcareous modifying agent and prepares to change
Good soil acidity or alkalinity and the soil conditioner of heavy metal pollution, reduce the chance that calcareous modifying agent is contacted with water, reach
The purpose that isolation lime is contacted with water, is readily transported and used；
Coating of the invention is formulated more than, and wherein lignosulfonates contain active group, in adsorbable soil
Heavy metal, and can slowly be degraded by microorganism in soil, humus is converted into, play improved soil and promote the effect of fertilizer efficiency
Really；Lignosulfonates and polyvinyl alcohol are carried out cross-linking reaction and are made blending coating solution by formaldehyde as crosslinking agent；Urea conduct
Plasticizer can not only make the enhancing of coating pliability, be easily worked, and can also be soil with the acid effect generation salt in soil
Supplement nitrogenous fertilizer, helps crop point to grow, and improves the yield and quality of agricultural product.
In addition lignosulfonates-polyvinyl alcohol blending coating and the calcareous material obtained by the present invention with compatible and
The effect of synergy, lignosulfonates-polyvinyl alcohol blending coating has control release to act on lime material, can extend lime
The effect stage of class material, improves its validity in agricultural production.
Preferably：The lignosulfonates are sodium lignin sulfonate, and the concentration of the formaldehyde is 37-40wt%.
When the concentration of formaldehyde is 37-40wt%, cross-linking effect is best.
Preferably：The preparation method of the sodium lignin sulfonate is comprised the following steps：
(1) plant containing xylem, sodium hydroxide solution, sodium sulfite are well mixed, obtain mixed material；
(2) mixed material is reacted into 24-48h at a temperature of 30-50 DEG C, obtains product；
(3) product is filtered and is collected resulting reaction solution, the revolving drying reaction solution
Obtain sodium lignin sulfonate.
Sodium lignin sulfonate of the invention is prepared from by the plant containing xylem, aqueous slkali, sodium sulfite, is contained herein
There is the preferred stalk of plant of xylem, because China is a large agricultural country, annual stalk yield is huge, be that stalk is provided in the world
One of most abundant country in source.The annual production of current China's stalk accounts for the 1/4 of world's stalk yield more than 600,000,000 tons, and with
Annual 0.12 hundred million tons of speed steady-state growth, is the most agricultural production byproduct of quantity in the world, and stalk main component bag
Include lignin and cellulose and hemicellulose class carbohydrate.Hemicellulose and lignin are in network knot by covalent bonding junction
Structure, cellulose inlays the support skeleton for wherein constituting plant cell wall, so lignocellulosic is typically difficult to hydrolyze, natural degradation
Speed it is extremely slow, therefore the most stalk of China is directly incinerated at this stage, not only wastes resource but also generation
Serious atmosphere pollution, causes the air quality to decline.
The present inventor has found that plant residue lignin component will outclass fiber for soil organism accumulation under study for action
Element and hemicellulose, lignocellulosic and its derivative are acted at aspects such as water conservation, heavy metal chelatings and protruded, therefore select to contain
There is the plant of xylem for main raw material(s), develop the feature lignin coating suitable for calcareous improvement, what is prepared
During, the lignin component in stalk is extracted first with alkali lye, the lignin that then will be extracted is carried out with sulfonate
Sulfonating reaction, so as to prepare the lignosulfonates of stabilization.The preparation method of lignosulfonates of the present invention can support plant
The recovery of lignocellulosic residuum is processed with deep processing, and its cost of raw material is low, simple to operate, have a extensive future.
Further：The mass concentration of sodium hydroxide solution described in step (1) is 2-8%, described containing xylem
Plant, sodium hydroxide solution, the mass ratio of sodium sulfite are 100：20-80：1-10.
Preferably：The calcareous modifying agent is quick lime, white lime, agstone, the lime nitrogen for meeting agricultural standards
Gypsum single preparations of ephedrine or contain the compound of one or more in quick lime, white lime, agstone, lime nitrogen or gypsum
Preparation.
Preferably：The calcareous modifying agent is 100 with the weight ratio of the coating:13-120：15.
A kind of method for preparing the lignosulfonates-polyvinyl alcohol blending coating soil conditioner, including following step
Suddenly：
S1：In the calcareous modifying agent surface spraying oiliness hydrophobic medium, core agent is obtained after drying with standby；
S2：The lignosulfonates of above-mentioned weight portion and polyvinyl alcohol are placed in 90-100 DEG C of water and react 60-
90min, is subsequently adding the urea reaction 15-30min of above-mentioned weight portion, and the formaldehyde for being eventually adding above-mentioned weight portion carries out 60-
The cross-linking reaction of 90min, obtains blending coating solution；
S3：By in the core agent obtained by blend film solution spraying described in S2 to S1, sulfomethylated lignin is can obtain after drying
Hydrochlorate-polyvinyl alcohol blending coating soil conditioner.
The present invention first wraps up one layer of oiliness hydrophobic medium in the outside of calcareous modifying agent, such as tung oil, reduce further
Blending coating solution and the reaction of calcareous modifying agent, overcome the shortcoming that formula is easily given away secrets.
Preferably：When the calcareous modifying agent is pulvis, it is additionally included in before operation S1 the step of first granulated, institute
It is according to 100-120 by the calcareous modifying agent of pulvis and adhesive to state granulation：The weight portion of 0.9-1.7 is well mixed, then
It is made as granular calcareous modifying agent.
Further：The compression strength of the granular calcareous modifying agent is more than 8N, and particle diameter is 3.5-4mm.
Preferably：The step of also carried out after the step of drying secondary coating oiliness hydrophobic medium has been operated in step S3,
Secondary coating oiliness hydrophobic medium is dried again after terminating, and can obtain lignosulfonates-polyvinyl alcohol blending coating soil
Earth modifying agent.
Coat oiliness hydrophobic medium again after lignosulfonates-polyvinyl alcohol blending coating has been coated, such as tung oil, can
Further to increase security of the invention, reduce lignosulfonates-polyvinyl alcohol blending coating soil conditioner and using
When injury to human body skin.
Beneficial effects of the present invention：
1st, the present invention is used to be wrapped in lignosulfonates-polyvinyl alcohol to be prepared on the outside of calcareous modifying agent and is used to
The soil conditioner of improved soil acid-base value and heavy metal, resulting lignosulfonates-polyvinyl alcohol blending coating and stone
Ash material has the effect of compatible and synergy, and lignosulfonates-polyvinyl alcohol blending coating has control to lime material
Release action, can extend the effect stage of lime material, improve its validity in agricultural production.Wood wherein in coating
Mahogany sulfonate contains active group, the heavy metal in adsorbable soil, and can slowly be degraded by microorganism in soil, conversion
It is humus, plays improved soil and promote the effect of fertilizer efficiency；Urea can not only make the enhancing of coating pliability, be easily worked,
And can also be soil supplement nitrogenous fertilizer with the acid effect generation salt in soil, help crop point to grow, improve agricultural product yield and
Quality；Last lignosulfonates of the invention-polyvinyl alcohol blending coating reduces the machine that calcareous modifying agent is contacted with water
Meeting, has reached the purpose that isolation lime is contacted with water, is readily transported and used；
2nd, the lignosulfonates in the present invention are prepared from by the plant containing xylem, aqueous slkali, sodium sulfite, its
Preparation method can support that the recovery of wood cellulose residuum is processed with deep processing, and its cost of raw material is low, simple to operate, should
With having a extensive future.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1-3 is three effects of the lignosulfonates-polyvinyl alcohol blending coating obtained by the embodiment of the present invention 2
Figure；
Fig. 4-6 is three effects of the lignosulfonates-polyvinyl alcohol blending coating obtained by the embodiment of the present invention 3
Figure；
Fig. 7-9 is three effects of the lignosulfonates-polyvinyl alcohol blending coating obtained by the embodiment of the present invention 4
Figure；
Figure 10 is the lignosulfonates-polyvinyl alcohol blending coating soil conditioner obtained by the embodiment of the present invention 2
Design sketch；
Figure 11 is the lignosulfonates-polyvinyl alcohol blending coating soil conditioner obtained by the embodiment of the present invention 3
Design sketch；
Figure 12 is the lignosulfonates-polyvinyl alcohol blending coating soil conditioner obtained by the embodiment of the present invention 4
Design sketch；
Figure 13 is the lignosulfonates-polyvinyl alcohol blending coating soil conditioner obtained by present invention implementation 3
Releasing ratio.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical scheme will be carried out below
Detailed description.Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are resulting on the premise of creative work is not made to be owned
Other embodiment, belongs to the scope that the present invention is protected.
1 weight portion acute pyogenic infection of finger tip 1g in following embodiments.
Embodiment 1
A kind of lignosulfonates-polyvinyl alcohol blending coating soil conditioner, including the lime nitrogen for meeting agricultural standards
With the coating being coated on the outside of lime nitrogen, the mass ratio of the lime nitrogen and the coating is 100:13, the coating include with
The raw material of lower weight portion：2 parts of sodium lignin sulfonate, 9 parts of polyvinyl alcohol, 2 parts of urea, 1 part of the formaldehyde of 37wt%.
A kind of method for preparing lignosulfonates-polyvinyl alcohol blending coating soil conditioner, comprises the following steps：
S1：Lime nitrogen by 100 weight portions, particle diameter more than 2mm is laid in iron pan, then will heat the tung oil after cooling
(anhydrous) falls lime surface, and rolling calcareous modifying agent simultaneously makes tung oil uniformly be wrapped in the surface of calcareous modifying agent, natural
After drying (or rolled, prevent the viscous iron pan of oil) core agent with standby；
S2：(1) by sodium hydroxide solution, sodium sulfite that stalk, mass concentration are 2% by 100：20：1 mass ratio is mixed
Close uniform, obtain mixed material；
(2) mixed material is reacted into 24h at a temperature of 30 DEG C, obtains product；
(3) product is filtered and is collected resulting reaction solution, the revolving drying reaction solution
Obtain sodium lignin sulfonate；
(4) water of 48 weight portions is injected in beaker, water temperature is heated to for 90 DEG C, above-mentioned weight portion is then poured into respectively
Sodium lignin sulfonate and polyvinyl alcohol, fully persistently stir 50min, lignin is fully reacted with polyvinyl alcohol, continuously add
Urea, persistently stirs 15 minutes at 90 DEG C, and being eventually adding formaldehyde carries out cross-linking reaction, continues stirring reaction 60 minutes, must be total to
Mixed coating solution；
S3：The core agent that S1 is obtained is placed in the sieve of 2mm, sieve lower section place a beaker, will be blended coating solution it is micro- dry in the air it is cool after,
Fallen in core agent surface again in the blending coating solution in core agent, leaking through sieve, it is repeated multiple times to calcareous modifying agent and coating
Mass ratio be 100:13, then dried in the air to drying (or rolled, prevent the viscous iron pan of oil) in exposure in sunshine, obtain coating improvement
Agent particle.
S4：Finally chilly tung oil (anhydrous) but after heating is coated on the outer surface of coating modifying agent particle again,
Secondary bag oil is carried out to coating modifying agent particle, (or rolled, prevent the viscous iron pan of oil) is dried in exposure in the sun, you can
Obtain lignosulfonates-polyvinyl alcohol blending coating soil conditioner.
Embodiment 2
A kind of lignosulfonates-polyvinyl alcohol blending coating soil conditioner, including the compound preparation containing quick lime
With the coating being coated on the outside of the compound preparation containing quick lime, the compound preparation containing quick lime and the coating
Mass ratio be 100:13, the coating includes the raw material of following weight portion：5 parts of sodium lignin sulfonate, 10 parts of polyvinyl alcohol, urine
Plain 5 parts, 5 parts of the formaldehyde of 40wt%.
A kind of method for preparing lignosulfonates-polyvinyl alcohol blending coating soil conditioner, comprises the following steps：
S1：By the compound preparation containing quick lime of pulvis and adhesive according to 100：0.9 weight ratio is mixed, so
After be made as compression strength for 8N, particle diameter is the calcareous modifying agent particle of 3.5mm, by calcareous modifying agent particle, tiling
In iron pan, the tung oil (anhydrous) heated after cooling is then fallen into lime surface, rolling calcareous modifying agent simultaneously makes tung oil equal
The even surface for being wrapped in calcareous modifying agent, after drying naturally (or rolled, prevent the viscous iron pan of oil) core agent with standby；
S2：(1) by sodium hydroxide solution, sodium sulfite that stalk, mass concentration are 6% by 100：60：5 mass ratio is mixed
Close uniform, obtain mixed material；
(2) mixed material is reacted into 36h at a temperature of 40 DEG C, obtains product；
(3) product is filtered and is collected resulting reaction solution, the revolving drying reaction solution
Obtain sodium lignin sulfonate；
(4) water of 50 weight portions is injected in beaker, water temperature is heated to for 90 DEG C, above-mentioned weight portion is then poured into respectively
Sodium lignin sulfonate and polyvinyl alcohol, fully persistently stir 50min, lignin is fully reacted with polyvinyl alcohol, continuously add
Urea, 15min is persistently stirred at 90 DEG C, and being eventually adding formaldehyde carries out cross-linking reaction, continues stirring reaction 60 minutes, must be blended
Coating solution；
S3：The core agent that S1 is obtained is placed in the sieve of 2mm, sieve lower section place a beaker, will be blended coating solution it is micro- dry in the air it is cool after,
Fallen in core agent surface again in the blending coating solution in core agent, leaking through sieve, it is repeated multiple times to calcareous modifying agent and coating
Mass ratio be 100:13, then dried in the air to drying (or rolled, prevent the viscous iron pan of oil) in exposure in sunshine, obtain coating improvement
Agent particle.
S4：Finally chilly tung oil (anhydrous) but after heating is coated on the outer surface of coating modifying agent particle again,
Secondary bag oil is carried out to coating modifying agent particle, (or rolled, prevent the viscous iron pan of oil) is dried in exposure in the sun, you can
Obtain lignosulfonates-polyvinyl alcohol blending coating soil conditioner.
Embodiment 3
A kind of lignosulfonates-polyvinyl alcohol blending coating soil conditioner, including the white lime for meeting agricultural standards
With the coating being coated on the outside of white lime, the mass ratio of the white lime and the coating is 120:14, the coating include with
The raw material of lower weight portion：11 parts of sodium lignin sulfonate, 11 parts of polyvinyl alcohol, 11 parts of urea, 8 parts of the formaldehyde of 40wt%.
A kind of method for preparing lignosulfonates-polyvinyl alcohol blending coating soil conditioner, comprises the following steps：
S1：By the white lime of pulvis and adhesive according to 120：1.7 weight ratio is mixed, and is then made as compression strength
It is 8.5N, particle diameter is the calcareous modifying agent particle of 4mm, and calcareous modifying agent particle is laid in iron pan, then will
Tung oil (anhydrous) after heating cooling falls lime surface, rolls calcareous modifying agent and tung oil is uniformly wrapped in calcareous and changes
Good dose of surface, after drying naturally (or rolled, prevent the viscous iron pan of oil) core agent with standby；
S2：(1) by sodium hydroxide solution, sodium sulfite that stalk, mass concentration are 4% by 100：80：10 mass ratio
It is well mixed, obtain mixed material；
(2) mixed material is reacted into 48h at a temperature of 40 DEG C, obtains product；
(3) product is filtered and is collected resulting reaction solution, the revolving drying reaction solution
Obtain sodium lignin sulfonate；
(4) water of 50 weight portions is injected in beaker, water temperature is heated to for 95 DEG C, 0 above-mentioned weight portion is then poured into respectively
Sodium lignin sulfonate and polyvinyl alcohol, in beaker add 1 stirrer, fully persistently stir 60min, make lignin with poly- second
Enol fully reacts, and continuously adds urea, is persistently stirred at 95 DEG C 20 minutes, and being eventually adding formaldehyde carries out cross-linking reaction, after
Continuous stirring reaction 70 minutes, obtains blending coating solution；
S3：The core agent that S1 is obtained is placed in the sieve of 2mm, sieve lower section place a beaker, will be blended coating solution it is micro- dry in the air it is cool after,
Fallen in core agent surface again in the blending coating solution in core agent, leaking through sieve, it is repeated multiple times to calcareous modifying agent and coating
Mass ratio be 120:14, then dried in the air to drying (or rolled, prevent the viscous iron pan of oil) in exposure in sunshine, obtain coating improvement
Agent particle.
S4：Finally chilly tung oil (anhydrous) but after heating is coated on the outer surface of coating modifying agent particle again,
Secondary bag oil is carried out to coating modifying agent particle, (or rolled, prevent the viscous iron pan of oil) is dried in exposure in the sun, you can
Obtain lignosulfonates-polyvinyl alcohol blending coating soil conditioner.
Embodiment 4
A kind of lignosulfonates-polyvinyl alcohol blending coating soil conditioner, including contain quick lime, white lime, stone
The compound preparation of limestone flour, lime nitrogen and gypsum and the coating being coated on the outside of compound preparation, the compound preparation and the bag
The mass ratio of film is 120:15, the coating includes the raw material of following weight portion：8 parts of sodium lignin sulfonate, 11 parts of polyvinyl alcohol,
10 parts of the formaldehyde of 11 parts of urea, 40wt%.
A kind of method for preparing lignosulfonates-polyvinyl alcohol blending coating soil conditioner, comprises the following steps：
S1：By the compound preparation and adhesive containing quick lime, white lime, agstone, lime nitrogen and gypsum of pulvis
According to 120：1.2 weight ratio is mixed, and is then made as compression strength for 8N, and particle diameter is improved for the calcareous of 3.5mm
Agent particle, calcareous modifying agent particle is laid in iron pan, and the tung oil (anhydrous) heated after cooling then fallen into lime table
Face, roll calcareous modifying agent simultaneously tung oil is uniformly wrapped in the surface of calcareous modifying agent, dry naturally after (or rolled
It is dynamic, prevent the viscous iron pan of oil) core agent is obtained with standby；
S2：(1) by sodium hydroxide solution, sodium sulfite that stalk, mass concentration are 8% by 100：80：10 mass ratio
It is well mixed, obtain mixed material；
(2) mixed material is reacted into 48h at a temperature of 50 DEG C, obtains product；
(3) product is filtered and is collected resulting reaction solution, the revolving drying reaction solution
Obtain sodium lignin sulfonate；
(4) water of 52 weight portions is injected in beaker, water temperature is heated to for 100 DEG C, above-mentioned weight portion is then poured into respectively
Sodium lignin sulfonate and polyvinyl alcohol, fully persistently stir 90min, lignin is fully reacted with polyvinyl alcohol, continue plus
Enter urea, 30min is persistently stirred at 100 DEG C, being eventually adding formaldehyde carries out cross-linking reaction, continues stirring reaction 90min, must be total to
Mixed coating solution；
S3：The core agent that S1 is obtained is placed in the sieve of 2mm, sieve lower section place a beaker, will be blended coating solution it is micro- dry in the air it is cool after,
In the calcareous modifying agent of bag oil, the blending coating solution for leaking through sieve falls in core agent surface again, repeated multiple times to calcareous
Modifying agent is 120 with the mass ratio of coating:15, then exposure in sunshine dry in the air to drying (or rolled, prevent the viscous iron of oil
Disk), obtain coating modifying agent particle.
S4：Finally chilly tung oil (anhydrous) but after heating is coated on the outer surface of coating modifying agent particle again,
Secondary bag oil is carried out to coating modifying agent particle, (or rolled, prevent the viscous iron pan of oil) is dried in exposure in the sun, you can
Obtain lignosulfonates-polyvinyl alcohol blending coating soil conditioner.
Certainly calcareous modifying agent can be using the direct coating of particle of certain specification in the present invention, it would however also be possible to employ extruding
Granulating technique manufactures qualified particle and carries out coating, and fluidized-bed spraying film-coating technique can be used during coating and bag tung oil
Or other spraying methods, the preferred parameters described below of operation of fluidized-bed coating machine：65 DEG C of EAT；Compressed air pressure 0.3Pa；
Shower nozzle atomization pressure 0.2Pa.
Application method of the invention is：Directly the present invention was spread fertilizer over the fields in 10-15 days before the farming of field, is turned over after spreading fertilizer over the fields
Ground；Or applied as base manure after the present invention is mixed with other graininess chemical fertilizer.If the core agent in the present invention is lime
Suggestion is spread fertilizer over the fields for more than 15 days in advance during nitrogen product, is spread fertilizer over the fields rear earthing and is watered, then closed 7-10 days, 7-10 with plastic film mulching
Its thickness opens film ventilation and is ploughed again and sowed for 7-10 days.
Below to the lignosulfonates obtained by embodiment of the present invention 2-4-polyvinyl alcohol blending coating and lignin
The effect of sulfonate-polyvinyl alcohol blending coating soil conditioner is verified that coating effect as shown in figs. 1-12, can from figure
To find out, the lignosulfonates-equal No leakage of polyvinyl alcohol blending coating obtained by embodiment 2-4 is homogeneous, wherein selecting
Select the lignosulfonates obtained by embodiment 3-polyvinyl alcohol blending coating soil conditioner and further verify its slow release effect,
Result as shown in figure 13, slowly discharges in preceding 4 days inner investments, and calcareous material is completely released substantially after the 5th day, therefore its
Security reliability, slow-release time is controllable, can effectively mitigate the injury to user.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of lignosulfonates-polyvinyl alcohol blending coating soil conditioner, it is characterised in that including calcareous modifying agent
With the coating being coated on the outside of the calcareous modifying agent, raw material of the coating including following weight portion：Lignosulfonates
2-10 parts, polyvinyl alcohol 9-11 parts, urea 2-10 parts, formaldehyde 1-10 parts, water 48-52 parts.
2. lignosulfonates according to claim 1-polyvinyl alcohol blending coating soil conditioner, it is characterised in that
The lignosulfonates are sodium lignin sulfonate, and the concentration of the formaldehyde is 37-40wt%.
3. lignosulfonates according to claim 2-polyvinyl alcohol blending coating soil conditioner, it is characterised in that
The preparation method of the sodium lignin sulfonate is comprised the following steps：
(1) plant containing xylem, sodium hydroxide solution, sodium sulfite are well mixed, obtain mixed material；
(2) mixed material is reacted into 24-48h at a temperature of 30-50 DEG C, obtains product；
(3) product is filtered and is collected resulting reaction solution, the revolving drying reaction solution can be obtained wooden
Quality sodium sulfonate.
4. lignosulfonates according to claim 3-polyvinyl alcohol blending coating soil conditioner, it is characterised in that
The mass concentration of sodium hydroxide solution described in step (1) be 2-8%, the plant containing xylem, sodium hydroxide solution,
The mass ratio of sodium sulfite is 100：20-80：1-10.
5. the lignosulfonates according to any one of claim 1-4-polyvinyl alcohol blending coating soil conditioner, its
It is characterised by, the calcareous modifying agent is quick lime, white lime, agstone, lime nitrogen or the gypsum for meeting agricultural standards
Single preparations of ephedrine or contain the compound preparation of one or more in quick lime, white lime, agstone, lime nitrogen or gypsum.
6. the lignosulfonates according to any one of claim 1-4-polyvinyl alcohol blending coating soil conditioner, its
It is characterised by, the calcareous modifying agent is 100 with the weight ratio of the coating:13-120：15.
7. one kind prepares lignosulfonates-polyvinyl alcohol blending coating soil improvement as any one of claim 1-6
The method of agent, it is characterised in that comprise the following steps：
S1：In the calcareous modifying agent surface spraying oiliness hydrophobic medium, core agent is obtained after drying with standby；
S2：The lignosulfonates of above-mentioned weight portion and polyvinyl alcohol are placed in 90-100 DEG C of water and react 60-90min, so
The urea reaction 15-30min of above-mentioned weight portion is added afterwards, and being eventually adding the formaldehyde of above-mentioned weight portion carries out the crosslinking of 60-90min
Reaction, obtains blending coating solution；
S3：Will in the core agent obtained by blend film solution spraying described in S2 to S1, dry after i.e. can obtain lignosulfonates-
Polyvinyl alcohol blending coating soil conditioner.
8. lignosulfonates according to claim 7-polyvinyl alcohol blending coating soil conditioner, it is characterised in that
When the calcareous modifying agent is pulvis, it is additionally included in before operation S1 the step of first granulated, the granulation is by pulvis
Calcareous modifying agent and adhesive according to 100-120：The weight ratio of 0.9-1.7 is mixed, and is then made as granular stone
Ash modifying agent.
9. lignosulfonates according to claim 8-polyvinyl alcohol blending coating soil conditioner, it is characterised in that
The compression strength of the granular calcareous modifying agent is more than 8N, and particle diameter is 3.5-4mm.
10. lignosulfonates according to claim 7-polyvinyl alcohol blending coating soil conditioner, it is characterised in that
The step of also carried out after the step of drying secondary coating oiliness hydrophobic medium is operated in step S3, secondary coating oiliness is hydrophobic
Medium is dried again after terminating, and can obtain lignosulfonates-polyvinyl alcohol blending coating soil conditioner.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109777430A (en) * | 2019-03-14 | 2019-05-21 | 中国农业大学 | A kind of pH released microcapsule type macromolecule saline-alkali soil modifying agent and preparation method thereof |
| CN114606011A (en) * | 2022-04-21 | 2022-06-10 | 厦门大学嘉庚学院 | Acid soil conditioner and preparation method thereof |
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| CN105907400A (en) * | 2016-04-13 | 2016-08-31 | 中国科学院亚热带农业生态研究所 | Slow release oxidant adopting calcium peroxide as matrix and nanometer organic bentonite as coating film, and preparation method thereof |
| CN105907401A (en) * | 2016-04-13 | 2016-08-31 | 湖南省土壤肥料研究所 | Slow-release oxidizing agent with calcium peroxide as matrix and starch as coating film and preparation method |
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| CN109777430A (en) * | 2019-03-14 | 2019-05-21 | 中国农业大学 | A kind of pH released microcapsule type macromolecule saline-alkali soil modifying agent and preparation method thereof |
| CN114606011A (en) * | 2022-04-21 | 2022-06-10 | 厦门大学嘉庚学院 | Acid soil conditioner and preparation method thereof |
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Application publication date: 20170620 |