CN110003389A - A kind of environment-friendly type agricultural water-retaining agent and preparation method thereof - Google Patents
A kind of environment-friendly type agricultural water-retaining agent and preparation method thereof Download PDFInfo
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- CN110003389A CN110003389A CN201910227049.3A CN201910227049A CN110003389A CN 110003389 A CN110003389 A CN 110003389A CN 201910227049 A CN201910227049 A CN 201910227049A CN 110003389 A CN110003389 A CN 110003389A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
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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
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
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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
Abstract
The invention discloses a kind of environment-friendly type agricultural water-retaining agent and preparation method thereof, in preparation process, are adjusted by irradiation technique, starch selects alkalescent neutralizer, gel stage drying using adding alkali low temperature to be gelatinized method, energy consumption is reduced, irradiation dose utilization rate and production efficiency are improved；Starch greatly reduces gelatinization point using adding alkali low temperature to be gelatinized method, reduces production energy consumption, and can mix with acrylic acid neutralizer without cooling, reduces cooling link, improve production efficiency；It selects alkalescent neutralizer, the problem of the very exothermic occurred in very good solution neutralization reaction, can not use outside reaction kettle and to force cooling provision temperature control, improve production security；Using two-stage drying technology, drying time is shortened under the premise of not influencing water-retaining agent performance, improves production efficiency.
Description
Technical field
The invention belongs to agricultural water-retaining agent field of material technology, and in particular to a kind of environment-friendly type agricultural water-retaining agent and its preparation
Method.
Background technique
Water is the basis of agriculture and forestry production, and China's water resources shortage, arid and semiarid zone land area account for territory
The 47% of area, water resources shortage have seriously affected the development of China's agriculture and forestry.In addition, the spatial and temporal distributions of water resource are uneven
Weighing apparatus, north drought south flood, spring drought water-logging from autumnal rains, especially vast northern area, the rainfall of plum rain season are difficult to effectively store, most moisture
It is evaporated and is flowed away by underground.Soil erosion, agricultural, which are suffered from drought with desertification of land, urgently to be solved in current agriculture and forestry development
Certainly the problem of.High-hydroscopicity water-retaining agent (superabsorbent polymer, SAP) is by its excellent water absorbing capacity and well
Water-retaining property can be used for alleviating the above problem, SAP is also known as super absorbent resin, is a kind of functionality with hydrophilic network structure
High molecular material, absorbing multiple generally can reach 200~700 times of own wt.SAP can absorb water big when raining or pouring
The moisture of amount simultaneously stores, and in the case where drought and water shortage, plant is utilized by root absorption for own growth.SAP is to soil
The formation of earth crumb structure has facilitation, improves the environmental aspect of root system of plant and Soil Interface, directly provides the water of plant
Divide supply；Can also be by improving plant rhizosphere soil structure, and then improve the permeability of soil, promote soil water-retaining, supplies indirectly
Answer plant moisture.Therefore, SAP has huge application potential, city in terms of agriculture and forestry production, water and soil conservation and desertification reparation
Field has a extensive future, and has very major and immediate significance to the sustainable development of China's forestry and environment.
The type of SAP is relatively more, by the type of its hydrophilic radical, raw material sources, product form and can be crosslinked
The implementations such as method classification.Classified according to raw material sources, is 6 major class: starch-series, cellulose-based, chemical synthesis resin SAP points
More mainly chemistry is studied both at home and abroad at present by system, protein system, other natural and derivative system, blend and compound systems
Synthetic resin system SAP, preparation method mainly use polymerisation in solution, inverse suspension polymerization and inverse emulsion polymerization etc..These sides
Method is required to chemical initiator, has certain pollution, and complex process, operating difficulties, energy consumption are big, composite non-degradable, dirt
Soil is contaminated, and is had a single function, the disadvantages of Reusability is poor, limits it in the extensive use in agricultural field.
Summary of the invention
The purpose of the present invention is exactly that a kind of environment-friendly type agricultural for being directed to the problems of above-mentioned prior art and providing are protected
Aqua and preparation method thereof overcomes application limitation of the existing chemical synthesis resin system SAP in agriculture and forestry, using advanced core
Technology irradiates synthesis technology, prepares performance efficiency, environmental-friendly, biodegradable, not contaminated soil green SAP, with full
The demand of sufficient agriculture and forestry development.It in preparation process, is adjusted by irradiation technique, starch is selected weak using adding alkali low temperature to be gelatinized method
Antalkali, gel stage drying, reduces energy consumption, improves irradiation dose utilization rate and production efficiency；Starch, which uses, to be added
Alkali low temperature is gelatinized method, greatly reduces gelatinization point, reduces production energy consumption, and not having to cooling can be mixed with acrylic acid neutralizer
It closes, reduces cooling link, improve production efficiency；Alkalescent neutralizer is selected, is occurred in very good solution neutralization reaction
Very exothermic the problem of, can not be used outside reaction kettle force cooling provision temperature control, improve production security；Using two
Section dry technology, shortens drying time under the premise of not influencing water-retaining agent performance, improves production efficiency.
The purpose of the present invention is achieved through the following technical solutions:
An aspect of of the present present invention provides a kind of preparation method of environment-friendly type agricultural water-retaining agent, which is characterized in that the side
Method includes the following steps:
SS1. aqueous slkali is prepared
In preparing alkali kettle, a certain amount of solid base is put into, stirring is lower plus deionized water is allowed to dissolution and forms aqueous slkali, and cold
But stand-by to room temperature.
SS2. it neutralizes
A certain amount of acrylic acid (AA) and 2- acrylamide-2-methylpro panesulfonic acid are put into neutralization reaction kettle
(AMPS), under agitation, the aqueous slkali prepared in step SS1 is slowly sent to neutralization reaction kettle, neutralization reaction is complete
It is cooled to room temperature after finishing stand-by.
SS3. starch gelatinization
Put into a certain amount of starch in starch gelatinization reaction kettle, and a certain amount of deionized water be added, while stirring plus
Enter a certain amount of KOH, 20~60min is gelatinized under 30~60 DEG C of water-baths and forms gelatinized starch, is cooled to room temperature stand-by.
SS4. mix packing
The gelatinized starch prepared in step SS3 is delivered to the neutralization reaction kettle in step SS2, is added one under stirring condition
Mixed feed liquid is delivered to the irradiation reaction case of liner polyester bag after mixing evenly by quantitative irradiation sensitizer, feed liquid
Charge weight is the 60~70% of irradiation reaction case volume.
SS5. irradiation synthesis
Irradiation reaction case in step SS4 is delivered to radiation chamber, carries out irradiation reaction, spoke using irradiation devices therein
It is 3~10kGy according to dosage.
SS6. slice is granulated
Feed liquid in step SS5 becomes gel after completing polymerization reaction, is drawn off, is first cut into sheet, then stripping and slicing, makes
It is granulated with gel pelletizer, partial size is 3~5mm.
(7) dry
Gel particle in step SS6 is sent into hot air drying system, moisture content is dried to and is lower than 6%, by sieving,
Environment-friendly type agricultural water-retaining agent product can be obtained in quality inspection and packaging.
In above-mentioned technical proposal disclosed in this invention, spoke is passed through in conjunction with organic monomer using natural biologic material starch
According to the environment-friendly type high-hydroscopicity SAP of technology synthesis, both overcame that natural material water absorbent rate is low, water retention property is poor, degradation is fast
The disadvantages of rate is too fast, but the chemical synthesis resin system SAP for overcoming prior art preparation is difficult to degrade, and easily causes environmental pollution etc.
Disadvantage.
Preferably, in step SS1, the solid base is potassium carbonate, one kind of ammonium carbonate or step directly is added using ammonium hydroxide
In the neutralization reaction kettle of rapid SS2.
Preferably, in step SS2, the degree of neutralization of the neutralization reaction is 50~90%.
Preferably, in step SS3, the starch is tapioca, cornstarch, wheaten starch, starch from sweet potato, potato
The one or more of starch.
Preferably, in step SS3, the starch is gelatinized 30~40min under 40~50 DEG C of water-baths.
Preferably, in step SS4, the irradiation sensitizer is N, N '-methylene-bisacrylamide, triallyl isocyanic acid
The one or more of ester, trimethylol-propane trimethacrylate.
Preferably, in step SS5, the irradiation dose is 4~9kGy, and X-ray unsymmetry is less than 1.5.
Preferably, in step SS5, the irradiation devices are used60When Co γ device, 2 handling goods yards, irradiation reaction are set
Case, automatically into transportation system, is realized automatic layer-changing by Transmission system and changes face, the method for operation is adopted by automatic assembling and disassembling system
With continuous operation, speed is 3~9m/min.
Further, in step SS5, the irradiation devices are used60When Co γ device,60The total activity of Co radioactive source is
50~2,000,000 Curie, radioactive source arrangement mode are veneer source or double plate sources, preferably double plate sources.
Further, in step SS5, the irradiation devices are used60When Co γ device, radioactive source frame outer dimension (long ×
It is wide × high) it is not less than 1972mm × 89mm × 2856mm, mountable radioactive source area is not less than 1800mm × 2545mm, mountable
Radiation source rod quantity is no less than 600.
Further, in step SS5, the maximum specification (length × width × height) of the irradiation reaction case internal volume is 1220mm
× 200mm × 1350mm, width are preferably 100~200mm.
Further, in step SS5, the irradiation devices are used60When Co γ device, heavy accumulation type is can be used in transportation system
Formula suspension chain, the suspended chain+formula of migrating cross one kind of source mechanical type, roller-way type.
Preferably, in step SS5, when the irradiation devices use electron accelerator, irradiation reaction case is placed in delivery system
System is sent into radiation chamber and is irradiated, and face is not changed in primary irradiation.
Further, in step SS5, when the irradiation devices use electron accelerator, energy is 1~10MeV, Shu Gong
Rate is 50~100kW, sweep length 100cm.
Further, in step SS5, when the irradiation devices use electron accelerator, irradiation reaction case is upper opening type,
Maximum width is 1000mm, is highly 50~100mm.
Further, in step SS5, when the irradiation devices use electron accelerator, roller is can be used in irradiation transportation system
Road formula, crawler type, one kind of chain type.
Preferably, in step SS7, the hot air drying system is divided into two sections, and one section of drying temperature is 110~150 DEG C, does
The dry time is 1~2h, and two-stage drying temperature is 40~80 DEG C, and drying time is 8~12h.
According to another aspect of the present invention, the present invention also provides the environment-friendly type agricultures synthesized according to above-mentioned preparation method
Woods water-retaining agent, by following parts by weight at being grouped as: AA with 100 parts of AMPS total amount, AMPS:AA is 1:9~1:2；Starch 10
~50 parts；It neutralizes and uses 50~90 parts of alkali；0.1~3 part of KOH；0.05~0.25 part of sensitizer of irradiation；Deionized water 500~700
Part.
Compared with prior art, environment-friendly type agricultural water-retaining agent and preparation method thereof of the invention, significant technological merit
It is:
(1) environment-friendly type agricultural water-retaining agent of the invention, performance efficiency, better than traditional chemical synthesis resin system SAP, and
Environmental-friendly, biodegradable, not contaminated soil, joined starch, greatly reduces production cost, and it is raw to can satisfy agriculture and forestry
It produces and the demand of desertification treatment, products application value height has practicability.
(2) preparation method of environment-friendly type agricultural water-retaining agent of the invention, is adjusted, the spy of irradiation reaction case by irradiation technique
Different design, starch alkaline process low temperature gelatinization, selects alkalescent neutralizer, and gel stage drying reduces energy consumption, improves irradiation agent
Utilization rate and production efficiency are measured, there is novelty.
(3) preparation method of environment-friendly type agricultural water-retaining agent of the invention, starch are substantially reduced using adding alkali low temperature to be gelatinized method
Gelatinization point reduces production energy consumption, and does not have to cooling and can mix with acrylic acid neutralizer, reduces cooling link, raising
Production efficiency.
(4) preparation method of environment-friendly type agricultural water-retaining agent of the invention selects potassium carbonate, ammonium carbonate or ammonium hydroxide as neutralization
The problem of agent, the very exothermic occurred in very good solution neutralization reaction, pressure cooling can not be used to arrange outside reaction kettle
Temperature control is applied, improves production security, and K, N are also used as fertilizer and are utilized by plant.
(5) preparation method of environment-friendly type agricultural water-retaining agent of the invention, by controlling the transmission speed of automatic transmission system,
Irradiation dose is adjusted, dedicated irradiation reaction case is devised, solves irradiation dose distributed controll and irradiation polymerization reaction vessel
Cooperation problem, improve irradiation reaction efficiency.
(6) preparation method of environment-friendly type agricultural water-retaining agent of the invention is not influencing water-retaining agent using two-stage drying technology
Drying time is shortened under the premise of performance, improves production efficiency.
Detailed description of the invention
Fig. 1 is the preparation technology flow chart of environment-friendly type agricultural water-retaining agent of the invention.
Specific embodiment
In order to better understand the present invention, below with reference to the embodiment content that the present invention is furture elucidated, so that of the invention
The advantages of and feature can be easier to be readily appreciated by one skilled in the art.It should be noted that it is as described below be only it is of the invention compared with
Good embodiment, but the contents of the present invention are not limited to the following examples.In fact, without departing from the scope or spirit of the invention
In the case where, it can carry out various modifications and change in the present invention, this will be apparent for a person skilled in the art
's.For example, the feature that a part as one embodiment shows or describes can be used together to produce with another embodiment
Another raw embodiment.Therefore, it is intended that such modifications and variations are included in appended claims and it by the present invention
Equivalent in the range of.
Embodiment 1
It is the preparation technology flow chart of environment-friendly type agricultural water-retaining agent provided by the invention shown in Fig. 1.It mainly include following work
Skill step:
(1) aqueous slkali is prepared
In preparing alkali kettle, the potash solid of 270kg is put into, stirring is lower plus deionized water is allowed to dissolve, and is cooled to room temperature
For use.
(2) it neutralizes
The AMPS that the AA and 60kg of 240kg are put into neutralization reaction kettle, under agitation, by the carbon in step (1)
Sour potassium solution is slowly sent by delivery pump to neutralization reaction kettle, is cooled to room temperature after neutralization reaction stand-by.
(3) starch gelatinization
The cornstarch that 100kg is put into starch gelatinization reaction kettle is added a certain amount of deionized water with delivery pump, beats
Agitating device is opened, the KOH of 1kg is added, 60min is gelatinized under 30 DEG C of water-baths, is cooled to room temperature.
(4) mix packing
Corn starch paste conveying in step (3) is pumped to neutralization reaction kettle, is added with stirring the irradiation sensitization of 0.6kg
Agent N, N '-methylene-bisacrylamide is pumped into the irradiation reaction case of liner polyester bag with conveying after mixing evenly, solution
Charge weight is the 60% of reaction chamber volume.
(5) irradiation synthesis
Irradiation reaction case in step (4) is entered into radiation chamber through transportation system, using 500,000 Curie60Co Dynarad
Carry out irradiation reaction, irradiation dose 10kGy.
(6) slice is granulated
Feed liquid becomes gel after completing polymerization reaction, is drawn off, is first cut into sheet, then stripping and slicing, is granulated using gel
Machine is granulated, and partial size is 3~5mm.
(7) dry
Gel particle in step (6) is sent into hot air drying system, 1h is dried at being 150 DEG C in temperature, then 80
DEG C drying 8h, is dried to moisture content≤6%, by screening, quality inspection and packaging, the production of environment-friendly type agricultural water-retaining agent can be obtained
Product.
In above-mentioned steps (5), the arrangement mode of the radioactive source of irradiation devices is veneer source, and radioactive source frame outer dimension is (long
× wide × high) it is 1972mm × 89mm × 2856mm, mountable radioactive source area is 1800mm × 2545mm, mountable radioactive source
Stick quantity is 600, and irradiation reaction case internal volume specification (length × width × height) is 1220mm × 200mm × 1350mm, and irradiation is anti-
Case is answered to carry out automatic layer-changing by Transmission system and change face, irradiation Transmission system hangs chain, operation side using heavy accumulation type formula
Formula uses continuous operation, speed 9m/min.
The water absorbing properties of water-retaining agent are measured, suction pure water multiple is 593g/g, inhales salt water (0.9%NaCl) multiple
For 110g/g.
Embodiment 2
It is the preparation technology flow chart of environment-friendly type agricultural water-retaining agent provided by the invention shown in Fig. 1.It mainly include following work
Skill step:
(1) aqueous slkali is prepared
In preparing alkali kettle, the ammonium carbonate solid of 210kg is put into, stirring is lower plus deionized water is allowed to dissolve, and is cooled to room temperature
For use.
(2) it neutralizes
The AMPS that the AA and 120kg of 180kg are put into neutralization reaction kettle, under agitation, by the carbon in step (1)
Acid ammonium solution is slowly sent by delivery pump to neutralization reaction kettle, is cooled to room temperature after neutralization reaction stand-by.
(3) starch gelatinization
The tapioca that 150kg is put into starch gelatinization reaction kettle is added a certain amount of deionized water with delivery pump, beats
Agitating device is opened, the KOH of 4.5kg is added, 30min is gelatinized under 60 DEG C of water-baths, is cooled to room temperature.
(4) mix packing
Tapioca starch paste conveying in step (3) is pumped to neutralization reaction kettle, is added with stirring the irradiation sensitization of 0.3kg
Agent triallyl isocyanate is pumped into the irradiation reaction case of liner polyester bag, the charge weight of solution with conveying after mixing evenly
It is the 70% of reaction chamber volume.
(5) irradiation synthesis
Irradiation reaction case in step (4) is entered into radiation chamber through transportation system, using 1,000,000 Curie60Co γ irradiation dress
Set carry out irradiation reaction, irradiation dose 6kGy.
(6) slice is granulated
Feed liquid becomes gel after completing polymerization reaction, is drawn off, is first cut into sheet, then stripping and slicing, is granulated using gel
Machine is granulated, and partial size is 3~5mm.
(7) dry
Gel particle in step (6) is sent into hot air drying system, 2h is dried at being 120 DEG C in temperature, then 60
DEG C drying 10h, is dried to moisture content≤6%, by screening, quality inspection and packaging, the production of environment-friendly type agricultural water-retaining agent can be obtained
Product.
In above-mentioned steps (5), arrangement mode of the radioactive source of irradiation devices using double plate sources, radioactive source frame outer dimension
(length × width × height) is 1972mm × 89mm × 2856mm, and mountable radioactive source area is 1800mm × 2545mm, mountable to put
Penetrating source rod quantity is 600, and irradiation reaction case internal volume specification (length × width × height) is 1220mm × 150mm × 1350mm, spoke
Automatic layer-changing is carried out by Transmission system according to reaction chamber and changes face, irradiation Transmission system crosses source machinery using the suspended chain+formula of migrating
Type, the method for operation use continuous operation, speed 6m/min.
The water absorbing properties of water-retaining agent are measured, suction pure water multiple is 686g/g, inhales salt water (0.9%NaCl) multiple
For 150g/g.
Embodiment 3
It is the preparation technology flow chart of environment-friendly type agricultural water-retaining agent provided by the invention shown in Fig. 1.It mainly include following work
Skill step:
(1) aqueous slkali is prepared
In preparing alkali kettle, the ammonium hydroxide for putting into 240kg is stand-by.
(2) it neutralizes
The AMPS that the AA and 30kg of 270kg are put into neutralization reaction kettle, under agitation, by the ammonia in step (1)
Water is slowly sent by delivery pump to neutralization reaction kettle, is cooled to room temperature after neutralization reaction stand-by.
(3) starch gelatinization
A certain amount of deionized water is added with delivery pump in the potato starch that 60kg is put into starch gelatinization reaction kettle,
Agitating device is opened, the KOH of 1.2kg is added, is gelatinized 40min under 50 DEG C of water-baths, is cooled to room temperature.
(4) mix packing
Potato Starch Paste conveying in step (3) is pumped to neutralization reaction kettle, the irradiation for being added with stirring 0.3kg is quick
Agent trimethylol-propane trimethacrylate is pumped into the irradiation reaction case of liner polyester bag with conveying after mixing evenly,
The charge weight of solution is the 60% of reaction chamber volume.
(5) irradiation synthesis
Irradiation reaction case in step (4) is entered into radiation chamber through transportation system, using the electron accelerator irradiation of 10MeV
Device carries out irradiation reaction, irradiation dose 4kGy.
(6) slice is granulated
Feed liquid becomes gel after completing polymerization reaction, is drawn off, is first cut into sheet, then stripping and slicing, is granulated using gel
Machine is granulated, and partial size is 3~5mm.
(7) dry
Gel particle in step (6) is sent into hot air drying system, 2h is dried at being 110 DEG C in temperature, then 40
DEG C drying 12h, is dried to moisture content≤6%, by screening, quality inspection and packaging, the production of environment-friendly type agricultural water-retaining agent can be obtained
Product.
In above-mentioned steps (5), the beam power of electron accelerator is 50kW, sweep length 100cm, and irradiation transportation system is adopted
With roller bed type, it is highly 50mm that irradiation box width, which is 1000mm,.
The water absorbing properties of water-retaining agent are measured, suction pure water multiple is 428g/g, inhales salt water (0.9%NaCl) multiple
For 60g/g.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright.It should be understood that the above is only a specific embodiment of the present invention, it is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of preparation method of environment-friendly type agricultural water-retaining agent, which is characterized in that described method includes following steps:
SS1. aqueous slkali is prepared
In preparing alkali kettle, a certain amount of solid base is put into, stirring is lower plus deionized water is allowed to dissolution and forms aqueous slkali, and is cooled to
Room temperature is stand-by.
SS2. it neutralizes
A certain amount of acrylic acid (AA) and 2- acrylamide-2-methylpro panesulfonic acid (AMPS) are put into neutralization reaction kettle,
Under stirring condition, the aqueous slkali prepared in step SS1 is slowly sent to neutralization reaction kettle, is cooled to after neutralization reaction
Room temperature is stand-by.
SS3. starch gelatinization
A certain amount of starch is put into starch gelatinization reaction kettle, and a certain amount of deionized water is added, and one is added while stirring
Quantitative KOH is gelatinized 20~60min under 30~60 DEG C of water-baths and forms gelatinized starch, is cooled to room temperature stand-by.
SS4. mix packing
The gelatinized starch prepared in step SS3 is delivered to the neutralization reaction kettle in step SS2, is added under stirring condition a certain amount of
Irradiation sensitizer mixed feed liquid is delivered to the irradiation reaction case of liner polyester bag, the loading of feed liquid after mixing evenly
Amount is the 60~70% of irradiation reaction case volume.
SS5. irradiation synthesis
Irradiation reaction case in step SS4 is delivered to radiation chamber, irradiation reaction is carried out using irradiation devices therein, irradiates agent
Amount is 3~10kGy.
SS6. slice is granulated
Feed liquid in step SS5 becomes gel after completing polymerization reaction, is drawn off, is first cut into sheet, then stripping and slicing, using solidifying
Glue pelletizer is granulated, and partial size is 3~5mm.
(7) dry
Gel particle in step SS6 is sent into hot air drying system, is dried to moisture content lower than 6%, by screening, quality inspection
And packaging, environment-friendly type agricultural water-retaining agent product can be obtained.
2. the preparation method of environment-friendly type agricultural water-retaining agent according to the claims, which is characterized in that in step SS1,
The solid base is potassium carbonate, one kind of ammonium carbonate or is directly added in the neutralization reaction kettle of step SS2 using ammonium hydroxide.
3. the preparation method of environment-friendly type agricultural water-retaining agent according to the claims, which is characterized in that in step SS2,
The degree of neutralization of the neutralization reaction is 50~90%.
4. the preparation method of environment-friendly type agricultural water-retaining agent according to the claims, which is characterized in that in step SS3,
The starch is the one or more of tapioca, cornstarch, wheaten starch, starch from sweet potato, potato starch.
5. the preparation method of environment-friendly type agricultural water-retaining agent according to the claims, which is characterized in that in step SS3,
The starch is gelatinized 30~40min under 40~50 DEG C of water-baths.
6. the preparation method of environment-friendly type agricultural water-retaining agent according to the claims, which is characterized in that in step SS4,
The irradiation sensitizer is N, N '-methylene-bisacrylamide, triallyl isocyanate, trimethylol propane trimethyl propylene
The one or more of acid esters.
7. the preparation method of environment-friendly type agricultural water-retaining agent according to the claims, which is characterized in that in step SS5,
The irradiation dose is 4~9kGy, and X-ray unsymmetry is less than 1.5.
8. the preparation method of environment-friendly type agricultural water-retaining agent according to the claims, which is characterized in that in step SS5,
The irradiation devices use60When Co γ device, 2 handling goods yards are set, irradiation reaction case by automatic assembling and disassembling system automatically into
Enter transportation system, automatic layer-changing is realized by Transmission system and change face, the method for operation uses continuous operation, and speed is 3~9m/
min。
9. the preparation method of environment-friendly type agricultural water-retaining agent according to claim 8, which is characterized in that described in step SS5
Irradiation devices use60When Co γ device,60The total activity of Co radioactive source is 50~2,000,000 Curie, and radioactive source arrangement mode is
Veneer source or double plate sources, preferably double plate sources.
10. the preparation method of environment-friendly type agricultural water-retaining agent according to claim 8, which is characterized in that in step SS5, institute
State irradiation devices use60When Co γ device, radioactive source frame outer dimension (length × width × height) not less than 1972mm × 89mm ×
2856mm, mountable radioactive source area are not less than 1800mm × 2545mm, and mountable radiation source rod quantity is no less than 600.
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