CN101508616B - Water-retaining slow/controlled release fertilizer and preparation method thereof - Google Patents
Water-retaining slow/controlled release fertilizer and preparation method thereof Download PDFInfo
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- CN101508616B CN101508616B CN2009100812893A CN200910081289A CN101508616B CN 101508616 B CN101508616 B CN 101508616B CN 2009100812893 A CN2009100812893 A CN 2009100812893A CN 200910081289 A CN200910081289 A CN 200910081289A CN 101508616 B CN101508616 B CN 101508616B
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 239
- 238000013270 controlled release Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 145
- 239000011248 coating agent Substances 0.000 claims abstract description 51
- 238000000576 coating method Methods 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 49
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 47
- 235000015097 nutrients Nutrition 0.000 claims abstract description 35
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 30
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 19
- 239000003999 initiator Substances 0.000 claims abstract description 18
- 239000000725 suspension Substances 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000000178 monomer Substances 0.000 claims description 99
- 229920000642 polymer Polymers 0.000 claims description 70
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 56
- 238000013268 sustained release Methods 0.000 claims description 56
- 239000012730 sustained-release form Substances 0.000 claims description 56
- 238000006243 chemical reaction Methods 0.000 claims description 41
- MEYZYGMYMLNUHJ-UHFFFAOYSA-N tunicamycin Natural products CC(C)CCCCCCCCCC=CC(=O)NC1C(O)C(O)C(CC(O)C2OC(C(O)C2O)N3C=CC(=O)NC3=O)OC1OC4OC(CO)C(O)C(O)C4NC(=O)C MEYZYGMYMLNUHJ-UHFFFAOYSA-N 0.000 claims description 34
- 235000010265 sodium sulphite Nutrition 0.000 claims description 28
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 27
- 239000012528 membrane Substances 0.000 claims description 26
- 239000002131 composite material Substances 0.000 claims description 22
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 21
- 239000012071 phase Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 16
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- 239000007788 liquid Substances 0.000 claims description 13
- 238000005303 weighing Methods 0.000 claims description 13
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000008187 granular material Substances 0.000 claims description 10
- 239000008346 aqueous phase Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000004945 emulsification Methods 0.000 claims description 8
- 238000005538 encapsulation Methods 0.000 claims description 8
- 238000005243 fluidization Methods 0.000 claims description 8
- 239000005457 ice water Substances 0.000 claims description 8
- 238000006386 neutralization reaction Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 8
- 238000010792 warming Methods 0.000 claims description 8
- 150000002148 esters Chemical class 0.000 claims description 7
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 2
- 239000004160 Ammonium persulphate Substances 0.000 claims description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 208000006558 Dental Calculus Diseases 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims description 2
- 229920002396 Polyurea Polymers 0.000 claims description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 2
- 235000019395 ammonium persulphate Nutrition 0.000 claims description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical group C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 239000004323 potassium nitrate Substances 0.000 claims description 2
- 235000010333 potassium nitrate Nutrition 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000011573 trace mineral Substances 0.000 claims description 2
- 235000013619 trace mineral Nutrition 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 30
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000010413 gardening Methods 0.000 abstract description 2
- 239000003431 cross linking reagent Substances 0.000 abstract 1
- 239000011241 protective layer Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000010558 suspension polymerization method Methods 0.000 abstract 1
- 235000013877 carbamide Nutrition 0.000 description 13
- 239000010408 film Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 5
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000003809 water extraction Methods 0.000 description 5
- 210000003608 fece Anatomy 0.000 description 4
- 239000010871 livestock manure Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
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- 238000010557 suspension polymerization reaction Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
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- 238000000280 densification Methods 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
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- -1 urethane ester Chemical class 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
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- Fertilizers (AREA)
Abstract
The invention discloses a water-retaining slow-controlled-release fertilizer and a preparation method thereof, belonging to the technical field of agricultural fertilizers and preparation thereof. The water-retaining slow-release fertilizer takes a macromolecular coated fertilizer as an inner core and a water-retaining layer as an outer layer to form the water-retaining controlled-release fertilizer with a double-layer film structure, the inner film is a macromolecular protective layer film material and has nutrient controlled-release performance, and the outer film is a water-retaining layer and has good water-retaining performance. And spraying the water-retaining agent suspension on the surface of the high-molecular coated fertilizer particles for outer-layer coating, wherein the water-retaining agent suspension is prepared by taking cyclohexane, an emulsifier, acrylic acid, acrylamide, sodium hydroxide, a cross-linking agent and an initiator as raw materials and adopting an inverse suspension polymerization method. The fertilizer has the functions of controlled release, drought resistance, water saving, water retention, soil structure improvement and the like, has the advantages of high water absorption rate, wear resistance, difficult falling and the like, can improve the utilization rate of water and fertilizer, and is widely applied to the aspects of desert control, lawn planting, soil improvement, gardening, agriculture and forestry and the like.
Description
Technical field
The invention belongs to agricultural fertilizer and preparing technical field thereof, particularly a kind of moisture-retention sustained release and release control fertilizer and preparation method thereof.
Background technology
China is a large agricultural country, and the ratio of chemical fertilizer in the agriculture prodn investment accounts for 50%, but China's fertilizer utilization ratio but has only 30%, causes the huge waste on the economical energy resources thus and has caused various environmental problems.Therefore sustained-controll-release fertiliser becomes the developing direction of the future of agriculture fertilizer, and the polymer coated fertilizer then is called real sustained-controll-release fertiliser by relevant expert.It is to utilize macromolecular material to form thin film on the fertilizer surface; The dissolution rate of control fertilizer in soil; Make the growing requirements of its dissolution rate and plant consistent, thereby reach the purpose of saving fertilizer, improving utilization rate of fertilizer and increase agricultural performance.
Drought and water shortage is restriction China's agricultural development and another important factor of quickening desertification of land, improves the farmland efficiency of water application and becomes one of central task of China's agricultural.Agricultural water-loss reducer has drought-resistant water-preserving, insulation, sustained-release synergistic, improves effects such as Soil structure; Can suppress leaching loss, the raising utilization rate of fertilizer of soil water evaporation, raising saturated soil water content, minimizing leaching property nutrient, can reduce the soil weight simultaneously, improve Soil structure and hydro-thermal situation.Though water-holding agent has superpower water-absorbing-retaining effect; But do not have fertilizer nutrient, nutrient then is that farm crop produce and the necessary nutritional condition of vegetation growth, simultaneously; Water-holding agent and fertilizer are used time-consuming respectively, also are unfavorable for the performance of liquid manure interaction and liquid manure effect.
Therefore, it is combined with sustained-controll-release fertiliser, prepare can delay controlled release nutrients again can water-absorbing-retaining, the research of the function diversification fertilizer of drought resisting will become fertilizer and research and produce the new focus in the field.Moisture-retention sustained release and release control fertilizer has the effect of water-holding agent and sustained-controll-release fertiliser concurrently, has the slow controlled release dual-use function of water-absorbing-retaining and nutrient.Moisture-retention sustained release and release control fertilizer can be regulated soil moisture surplus and deficiency, improves liquid manure and interacts, and improves water, fertile utilising efficiency, reduces the fertilizer nutrient pouring and moves, fixes or volatilization loss, alleviates environmental pollution.Therefore, fertilizer and water-holding agent is compound integrated, have complementary advantages, making the moisture-retention sustained release and release control fertilizer with water retaining function and the slow control-release function of nutrient becomes fertilizer research forward position and direction, meets water saving and dry farming and produces actual needs.
It is core that the water conservation sustained-controll-release fertiliser is meant with fertilizer, for the film material carries out coating, or in fertilizer core, contains the water-absorbent material with the high water absorbency polymer, and then with non-water-absorbing material coating.HE Quan et al (Chinese invention patent, 1583684? A? 20050223) with hydrophilic ethylene propylene rubber three yuan as sulfonic acid type polymer coating material to study its effect on the release of urea was investigated high poly The synthesis conditions and the ambient temperature on the urea release rate.People such as Mazazumi (Japanese Patent, 09309785A, 1997) are core with XPA, isobutene polymer, starch derivative and fertiliser mixtures, are the film material with the urethane ester polymer, have prepared a kind of slow release fertilizer that can be used for the paddy field.People such as Liu Mingzhu (Liu M.Z., Polym.Adv.Technol., 17,430,2006) use sodium acrylate and urea reaction to make water absorbent rate in the laboratory be 680 water-absorbing-retaining slow-release nitrogen fertilizer.People such as Wang (Chinese invention patent, 1781982 A 20060607) develop organic-inorganic compoiste water-keeping slow release composite fertilizer material.He Xusheng (development of water preserving type film coated urea fertilizer and evaluation. Beijing: graduate school of the Chinese Academy of Agricultural Sciences; 2004) develop a Technology of utilizing chemical polymerization directly to become membrane prepare water-holding agent film coated urea fertilizer on the urea granules surface; This water-holding agent coating has higher water absorbent rate; Coating is wear-resistant, the advantage of difficult drop-off, and certain nutrient slowly-released effect is arranged.
At present; There is following problem in the water-maintaining slowly-releasing release and release control fertilizer of existing article and disclosed patent report: the preparation of part water-maintaining slowly-releasing/release and release control fertilizer has been adopted sustained-release and controlled release fertilizer in reactor drum; Initiated polymerization parcel one deck water-holding agent; Be confined to laboratory scale, can't realize on the technology amplify producing, thus big limitations its large-scale commercial prodn.That what adopt is the slow release fertilizers such as urea formaldehyde of expensive is more as " the fertile core " of water-maintaining slowly-releasing/release and release control fertilizer, but the release period of this series products is generally shorter, and the release performance of nutrient is unsatisfactory.Water-maintaining slowly-releasing/release and release control fertilizer is in accumulating and use, and the film material makes moist easily or in handling process, comes off, and influences its result of use.
To the problem of above-mentioned existence, the invention discloses a kind of sustained-controll-release fertiliser of agricultural water retaining function.The polymer coating sustained-controll-release fertiliser good with controlled release properties is " fertile core ", thereby it is short to have solved fertilizer releasing period, the problem that controlled release properties is not good.The water conservation coating liquid adopts the source polymerization, uses the synthetic water conservation suspension-s of method of inverse suspension polymerization, and follow-up film-forming process can successively be carried out, and makes suitability for industrialized production become possibility.Improve the water absorbent rate of water-maintaining fertilizer and repeat water-absorbent, improve the water-absorbing-retaining performance of water-maintaining fertilizer.Novel moisture-retention sustained release and release control fertilizer and preparation process thereof involved in the present invention at home and abroad do not appear in the newspapers, and do not see use at home.
Summary of the invention
The purpose of this invention is to provide a kind of moisture-retention sustained release and release control fertilizer and preparation method thereof.
A kind of moisture-retention sustained release and release control fertilizer; It is characterized in that said moisture-retention sustained release and release control fertilizer integrates the control nutrient and discharges and water retaining function, is a kind of fertilizer with nutrient slow controlled release, drought resisting, the structure of economizing on water and improve the soil; Said moisture-retention sustained release and release control fertilizer is a kernel with the polymer coat fertilizer; The water conservation layer is outer, has formed a kind of water holding controlled release fertilizer of double membrane structure, and said polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer; The water holding controlled release fertilizer inner layer film of said double membrane structure is a polymer protection tunic material, has the nutrient controlled release properties, and outer membrane is the water conservation layer, has good water retention property.
Said polymer protection tunic material is one or more in polyolefine, urethane, polyacrylic ester, polyester, polyureas or the polycarbonate, and resist membrane material amount accounts for 2～15% of polymer coat fertilizer quality.
Said granulated fertilizer is water miscible granulated fertilizer; Particle diameter is 2～5mm; Straight fertilizer or the composite fertilizer of perhaps containing trace elements iron, manganese, boron, zinc, copper or molybdenum for straight fertilizer, composite fertilizer; Comprise urea, volatile salt, an ammonium nitrate, ammonium sulfate, one or more in vitriolate of tartar, Repone K, saltpetre, Secondary ammonium phosphate or the primary ammonium phosphate.
A kind of preparation method of moisture-retention sustained release and release control fertilizer is characterized in that, this method steps is following,
(1) take by weighing monomer, said monomer is Acrylic Acid Monomer and acrylic amide, and the Acrylic Acid Monomer quality accounts for 20～70% of monomer total mass, and the acrylic amide quality accounts for 30～80% of monomer total mass; Acrylic Acid Monomer is put into beaker; In ice-water bath,, make acrylic acid degree of neutralization reach 65～70% slowly to wherein adding sodium hydroxide solution; In above-mentioned solution, add acrylic amide, linking agent, initiator; And add water, and making the shared massfraction of aqueous phase monomer is 20～70%, fully dissolving joins mixing solutions in the tap funnel after mixing;
(2) in reaction kettle, add emulsifying agent Span-80 and external phase hexanaphthene; The ratio of the quality of emulsifying agent Span-80 and monomer total mass is 0.03～0.10; The add-on of hexanaphthene is for to make the water oil ratio hexanaphthene by mass ratio: water=(1: 2)～(9: 1); Tap funnel, whipping appts, the reflux condensing tube of step (1) are installed on the reaction kettle, stir, emulsifying agent is fully dissolved;
(3) under nitrogen protection, the drips of solution in the tap funnel is added in the reaction kettle, stir; Emulsification is warming up to 40～60 ℃, in reaction kettle, drips sodium sulfite solution; Wherein, the ratio of the quality of sodium sulfite anhy 96 and monomer total mass is 0.08～0.15%, reaction 2～5h; Obtain anti-phase suspension liquid, be water conservation coating suspension-s;
(4) in encapsulation tool, add the polymer coat fertilizer, said polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer, 60～90 ℃ of bulging hot blasts; Make the even fluidisation of fertilizer, the ratio according to water conservation coating suspension quality and polymer coat fertilizer quality is 0.05～0.20 then, adds water conservation coating suspension-s; Nozzle with pressure 0.1～0.3MPa evenly is sprayed onto the fertiliser granulates surface with water conservation coating suspension-s; Continue the drum hot blast, drying obtains moisture-retention sustained release and release control fertilizer.
Said linking agent is a N,N methylene bis acrylamide, and the linking agent quality is 0.06～0.09% with the ratio of monomer total mass.
Said initiator is an ammonium persulphate, 0.15～0.225% of the ratio of initiator quality and monomer total mass.
Said sodium sulfite solution is that concentration is 0.1～5g/L.
Beneficial effect of the present invention is: the present invention learns a kind of high-tech product that interosculates and invent with field such as environmental ecology science with modern agriculture resisting drought saving water technology, macromolecular material, can be widely used in gardening, eagroforestry, shelterbelt construction, lawn plant build, aspect such as soil improvement.Beneficial effect is following:
1, the present invention has utilized the method for inverse suspension polymerization to prepare water conservation coating suspension-s, and this method is that the optimization of water conservation coating suspension-s synthesis technique provides great facility, and provides the foundation for the production of serialization coating.
2, adopt the source polymerization technique, the suspension-s after synthetic is sprayed to the fertilizer surface filming, the thicknesses of layers of formation is even, densification.
3, the water conservation coated fertilizer that adopts this technology to make is a kind of new-type fertilizer with double membrane structure, and inner layer material has the nutrient controlled capability, and outer field material has good water-maintaining ability.
4, under the synergy of water-keeping material and outer membrane material, prolonged the release period of the nutrient of this water-maintaining controlled release fertilizer.
5, this fertilizer is a kind of coating sustained-controll-release fertiliser, is manured into soil fertilizer nutrient is discharged according to certain rule, improves the urine fertilizer utilization ratio, reduces the loss of fertilizer leaching loss.
6, this fertilizer has water retaining function, can water-absorbing-retaining after being manured into soil, and when plant needed, its moisture that receives can be improved the efficiency of water application in the soil by the plant absorbing utilization.
7, this fertilizer can absorb water repeatedly and release water, and after the suction, has formed one by one " miniature reservoir " and " nutrient pool "; Improve fertiliser granulates water regime on every side; Be beneficial to the mutual promoter action of liquid manure, improve the absorption rate of crop water, provide powerful support for for agriculture prodn and resisting drought saving water provide.
Embodiment
Embodiment 1
A kind of moisture-retention sustained release and release control fertilizer, said moisture-retention sustained release and release control fertilizer integrate the control nutrient and discharge and water retaining function, are a kind of fertilizer with nutrient slow controlled release, drought resisting, the structure of economizing on water and improve the soil; Said moisture-retention sustained release and release control fertilizer is a kernel with the polymer coat fertilizer, and the water conservation layer is outer, has formed a kind of water holding controlled release fertilizer of double membrane structure; Said polymer coat fertilizer is that (said polymer protection tunic material is a polyolefine to polymer protection tunic material coatedparticles fertilizer; Granulated fertilizer is a urea, i.e. polyolefine coated carbamide, and the urea particle diameter is 2～5mm; Protection tunic material polyolefine quality account for polyolefine coated carbamide quality 0.08%) the water holding controlled release fertilizer inner layer film of said double membrane structure is polymer protection tunic material; Have the nutrient controlled release properties, outer membrane is the water conservation layer, has good water retention property.
A kind of preparation method of moisture-retention sustained release and release control fertilizer, this method steps is following,
(1) take by weighing monomer, said monomer is Acrylic Acid Monomer and acrylic amide, and the Acrylic Acid Monomer quality accounts for 50% of monomer total mass, and the acrylic amide quality accounts for 50% of monomer total mass, takes by weighing Acrylic Acid Monomer 21g, acrylic amide 21g; Acrylic Acid Monomer is put into beaker; In ice-water bath; Be 10% aqueous sodium hydroxide solution slowly, make acrylic acid degree of neutralization reach 65%, in above-mentioned solution, add acrylic amide, linking agent N to wherein adding massfraction; N-methylene-bisacrylamide 0.033g (the linking agent quality is 0.0785% with the ratio of monomer total mass), initiator ammonium persulfate 0.08g (the initiator quality is 0.19% with the ratio of monomer total mass); And add 19g water, and making the shared massfraction of aqueous phase monomer is 66%, fully dissolving joins mixing solutions in the tap funnel after mixing;
(2) in reaction kettle, add emulsifying agent Span-80 and external phase hexanaphthene; According to the quality of emulsifying agent Span-80 and the ratio of monomer total mass is 0.069, adds 2.9g emulsifying agent Span-80, makes the water oil ratio hexanaphthene by mass ratio: water=7.8; Add hexanaphthene 190ml; Tap funnel, whipping appts, the reflux condensing tube of step (1) are installed on the reaction kettle, stir, emulsifying agent is fully dissolved;
(3) under nitrogen protection, the drips of solution in the tap funnel is added in the reaction kettle, stir; Emulsification is warming up to 45 ℃, in reaction kettle, drips sodium sulfite solution; Wherein, the ratio of the quality of sodium sulfite anhy 96 and monomer total mass is 0.095% (the 0.04g sodium sulfite anhy 96 joins the solution that forms in the 10ml water, and sodium sulfite solution concentration is 4g/L); Reaction 2h obtains anti-phase suspension liquid, is water conservation coating suspension-s;
(4) in encapsulation tool, add polymer coat fertilizer polyolefine coated carbamide 200g (the polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer), 80 ℃ of bulging hot blasts make the even fluidisation of fertilizer; Ratio according to water conservation coating suspension quality and polyolefine coated carbamide quality is 0.15 then; Add water conservation coating suspension-s 30g, water conservation coating suspension-s evenly is sprayed onto the fertiliser granulates surface, continue bulging hot blast with the nozzle of pressure 0.1MPa; Drying obtains moisture-retention sustained release and release control fertilizer.
Adopt water-extraction method to measure the controlled release properties of the moisture-retention sustained release and release control fertilizer of present embodiment preparation, the initial stage solubility rate is 0.4%, and the controlled release phase is 92 days.Record its multiplying power of inhaling zero(ppm) water 535 times under 25 ℃ for its water conservation layer.
Embodiment 2
A kind of moisture-retention sustained release and release control fertilizer; Said moisture-retention sustained release and release control fertilizer integrates the control nutrient and discharges and water retaining function; Be a kind of fertilizer with nutrient slow controlled release, drought resisting, the structure of economizing on water and improve the soil, said moisture-retention sustained release and release control fertilizer is a kernel with the polymer coat fertilizer, and the water conservation layer is outer; Formed a kind of water holding controlled release fertilizer of double membrane structure; Said polymer coat fertilizer is that (protection tunic material is a polyacrylic ester to polymer protection tunic material coatedparticles fertilizer, and granulated fertilizer is a 15-15-15 composite fertilizer, i.e. polyacrylic ester coating 15-15-15 composite fertilizer; 15-15-15 composite fertilizer particle diameter is 2～5mm, protection tunic material polyacrylic ester quality account for polyacrylic ester coating 15-15-15 composite fertilizer quality 4%); The water holding controlled release fertilizer inner layer film of said double membrane structure is a polymer protection tunic material, has the nutrient controlled release properties, and outer membrane is the water conservation layer, has good water retention property.
A kind of preparation method of moisture-retention sustained release and release control fertilizer, this method steps is following,
(1) take by weighing monomer, said monomer is Acrylic Acid Monomer and acrylic amide, and the Acrylic Acid Monomer quality accounts for 50% of monomer total mass, and the acrylic amide quality accounts for 50% of monomer total mass, takes by weighing Acrylic Acid Monomer 20g, acrylic amide 20g; Acrylic Acid Monomer is put into beaker; In ice-water bath; Be 10% aqueous sodium hydroxide solution slowly, make acrylic acid degree of neutralization reach 68%, in above-mentioned solution, add acrylic amide, linking agent N to wherein adding massfraction; N-methylene-bisacrylamide 0.035g (the linking agent quality is 0.0875% with the ratio of monomer total mass), initiator ammonium persulfate 0.09g (the initiator quality is 0.225% with the ratio of monomer total mass); And add 18g water, and making the shared massfraction of aqueous phase monomer is 69%, fully dissolving joins mixing solutions in the tap funnel after mixing;
(2) in reaction kettle, add emulsifying agent Span-80 and external phase hexanaphthene; According to the quality of emulsifying agent Span-80 and the ratio of monomer total mass is 0.07, adds 2.8g emulsifying agent Span-80, makes the water oil ratio hexanaphthene by mass ratio: water=7.8; Add hexanaphthene 180ml; Tap funnel, whipping appts, the reflux condensing tube of step (1) are installed on the reaction kettle, stir, emulsifying agent is fully dissolved;
(3) under nitrogen protection, the drips of solution in the tap funnel is added in the reaction kettle, stir; Emulsification is warming up to 50 ℃, in reaction kettle, drips sodium sulfite solution; Wherein, the ratio of the quality of sodium sulfite anhy 96 and monomer total mass is 0.1% (the 0.04g sodium sulfite anhy 96 joins the solution that forms in the 10ml water, and sodium sulfite solution concentration is 4g/L); Reaction 3h obtains anti-phase suspension liquid, is water conservation coating suspension-s;
(4) in encapsulation tool, add polymer coat fertilizer polyacrylic ester coating 15-15-15 composite fertilizer 200g (the polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer); 80 ℃ of bulging hot blasts; Make the even fluidisation of fertilizer, the ratio according to water conservation coating suspension quality and polymer coat fertilizer quality is 0.16 then, adds water conservation coating suspension-s 32g; Nozzle with pressure 0.2MPa evenly is sprayed onto the fertiliser granulates surface with water conservation coating suspension-s; Continue the drum hot blast, drying obtains moisture-retention sustained release and release control fertilizer.
Adopt water-extraction method to measure the controlled release properties of the moisture-retention sustained release and release control fertilizer of present embodiment preparation, the initial stage solubility rate is 0.2%, and the controlled release phase is 78 days.Record its multiplying power of inhaling zero(ppm) water 675 times under 25 ℃ for its water conservation layer.
Embodiment 3
A kind of moisture-retention sustained release and release control fertilizer; Said moisture-retention sustained release and release control fertilizer integrates the control nutrient and discharges and water retaining function, is a kind of fertilizer with nutrient slow controlled release, drought resisting, the structure of economizing on water and improve the soil, and said moisture-retention sustained release and release control fertilizer is a kernel with the polymer coat fertilizer; The water conservation layer is outer; Formed a kind of water holding controlled release fertilizer of double membrane structure, said polymer coat fertilizer is that (protection tunic material is a polyolefine to polymer protection tunic material coatedparticles fertilizer, and granulated fertilizer is a 16-16-16 composite fertilizer; 16-16-16 composite fertilizer particle diameter is 2～5mm, protection tunic material polyolefine quality account for polyolefine coating 16-16-16 composite fertilizer quality 7%); The water holding controlled release fertilizer inner layer film of said double membrane structure is a polymer protection tunic material, has the nutrient controlled release properties, and outer membrane is the water conservation layer, has good water retention property.
A kind of preparation method of moisture-retention sustained release and release control fertilizer, this method steps is following,
(1) take by weighing monomer, said monomer is Acrylic Acid Monomer and acrylic amide, and the Acrylic Acid Monomer quality accounts for 54.5% of monomer total mass, and the acrylic amide quality accounts for 45.5% of monomer total mass, takes by weighing Acrylic Acid Monomer 24g, acrylic amide 20g; Acrylic Acid Monomer is put into beaker; In ice-water bath; Be 10% aqueous sodium hydroxide solution slowly, make acrylic acid degree of neutralization reach 69%, in above-mentioned solution, add acrylic amide, linking agent N to wherein adding massfraction; N-methylene-bisacrylamide 0.035g (the linking agent quality is 0.0795% with the ratio of monomer total mass), initiator ammonium persulfate 0.08g (the initiator quality is 0.182% with the ratio of monomer total mass); And add 20g water, and making the shared massfraction of aqueous phase monomer is 68.75%, fully dissolving joins mixing solutions in the tap funnel after mixing;
(2) in reaction kettle, add emulsifying agent Span-80 and external phase hexanaphthene; According to the quality of emulsifying agent Span-80 and the ratio of monomer total mass is 0.064, adds 2.8g emulsifying agent Span-80, makes the water oil ratio hexanaphthene by mass ratio: water=7.8; Add hexanaphthene 200ml; Tap funnel, whipping appts, the reflux condensing tube of step (1) are installed on the reaction kettle, stir, emulsifying agent is fully dissolved;
(3) under nitrogen protection, the drips of solution in the tap funnel is added in the reaction kettle, stir; Emulsification is warming up to 52 ℃, in reaction kettle, drips sodium sulfite solution; Wherein, the ratio of the quality of sodium sulfite anhy 96 and monomer total mass is 0.09% (the 0.04g sodium sulfite anhy 96 joins the solution that forms in the 10ml water, and sodium sulfite solution concentration is 4g/L); Reaction 3h obtains anti-phase suspension liquid, is water conservation coating suspension-s;
(4) in encapsulation tool, add polymer coat fertilizer polyolefine coating 16-16-16 composite fertilizer 250g (the polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer); 75 ℃ of bulging hot blasts; Make the even fluidisation of fertilizer, the ratio according to water conservation coating suspension quality and polymer coat fertilizer quality is 0.19 then, adds water conservation coating suspension-s 47.5g; Nozzle with pressure 0.25MPa evenly is sprayed onto the fertiliser granulates surface with water conservation coating suspension-s; Continue the drum hot blast, drying obtains moisture-retention sustained release and release control fertilizer.
Adopt water-extraction method to measure the controlled release properties of the moisture-retention sustained release and release control fertilizer of present embodiment preparation, the initial stage solubility rate is 1.2%, and the controlled release phase is 56 days.Record its multiplying power of inhaling zero(ppm) water 452 times under 25 ℃ for its water conservation layer.
Embodiment 4
A kind of moisture-retention sustained release and release control fertilizer; Said moisture-retention sustained release and release control fertilizer integrates the control nutrient and discharges and water retaining function, is a kind of fertilizer with nutrient slow controlled release, drought resisting, the structure of economizing on water and improve the soil, and said moisture-retention sustained release and release control fertilizer is a kernel with the polymer coat fertilizer; The water conservation layer is outer; Formed a kind of water holding controlled release fertilizer of double membrane structure, said polymer coat fertilizer is that (protection tunic material is a polyolefine to polymer protection tunic material coatedparticles fertilizer, and granulated fertilizer is a 16-16-16 composite fertilizer; 16-16-16 composite fertilizer particle diameter is 2～5mm, protection tunic material polyolefine quality account for polyolefine coating 16-16-16 composite fertilizer quality 4%); The water holding controlled release fertilizer inner layer film of said double membrane structure is a polymer protection tunic material, has the nutrient controlled release properties, and outer membrane is the water conservation layer, has good water retention property.
A kind of preparation method of moisture-retention sustained release and release control fertilizer, this method steps is following,
(1) take by weighing monomer, said monomer is Acrylic Acid Monomer and acrylic amide, and the Acrylic Acid Monomer quality accounts for 42.9% of monomer total mass, and the acrylic amide quality accounts for 57.1% of monomer total mass, takes by weighing Acrylic Acid Monomer 18g, acrylic amide 24g; Acrylic Acid Monomer is put into beaker; In ice-water bath; Be 10% aqueous sodium hydroxide solution slowly, make acrylic acid degree of neutralization reach 65%, in above-mentioned solution, add acrylic amide, linking agent N to wherein adding massfraction; N-methylene-bisacrylamide 0.036g (the linking agent quality is 0.086% with the ratio of monomer total mass), initiator ammonium persulfate 0.078g (the initiator quality is 0.186% with the ratio of monomer total mass); And add 18g water, and making the shared massfraction of aqueous phase monomer is 70%, fully dissolving joins mixing solutions in the tap funnel after mixing;
(2) in reaction kettle, add emulsifying agent Span-80 and external phase hexanaphthene; According to the quality of emulsifying agent Span-80 and the ratio of monomer total mass is 0.076, adds 3.2g emulsifying agent Span-80, makes the water oil ratio hexanaphthene by mass ratio: water=8.23; Add hexanaphthene 190ml; Tap funnel, whipping appts, the reflux condensing tube of step (1) are installed on the reaction kettle, stir, emulsifying agent is fully dissolved;
(3) under nitrogen protection, the drips of solution in the tap funnel is added in the reaction kettle, stir; Emulsification is warming up to 55 ℃, in reaction kettle, drips sodium sulfite solution; Wherein, the ratio of the quality of sodium sulfite anhy 96 and monomer total mass is 0.095% (the 0.04g sodium sulfite anhy 96 joins the solution that forms in the 10ml water, and sodium sulfite solution concentration is 4g/L); Reaction 3.5h obtains anti-phase suspension liquid, is water conservation coating suspension-s;
(4) in encapsulation tool, add polymer coat fertilizer polyolefine coating 16-16-16 composite fertilizer 150g (the polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer); 85 ℃ of bulging hot blasts; Make the even fluidisation of fertilizer, the ratio according to water conservation coating suspension quality and polymer coat fertilizer quality is 0.20 then, adds water conservation coating suspension-s 30g; Nozzle with pressure 0.1MPa evenly is sprayed onto the fertiliser granulates surface with water conservation coating suspension-s; Continue the drum hot blast, drying obtains moisture-retention sustained release and release control fertilizer.
Adopt water-extraction method to measure the controlled release properties of the moisture-retention sustained release and release control fertilizer of present embodiment preparation, the initial stage solubility rate is 0.8%, and the controlled release phase is 145 days.Record its multiplying power of inhaling zero(ppm) water 470 times under 25 ℃ for its water conservation layer.
Embodiment 5
A kind of moisture-retention sustained release and release control fertilizer; Said moisture-retention sustained release and release control fertilizer integrates the control nutrient and discharges and water retaining function, is a kind of fertilizer with nutrient slow controlled release, drought resisting, the structure of economizing on water and improve the soil, and said moisture-retention sustained release and release control fertilizer is a kernel with the polymer coat fertilizer; The water conservation layer is outer; Formed a kind of water holding controlled release fertilizer of double membrane structure, said polymer coat fertilizer is that (protection tunic material is a urethane to polymer protection tunic material coatedparticles fertilizer, and granulated fertilizer is a 15-15-15 composite fertilizer; Protection tunic material urethane quality accounts for 3% of polyurethane coated 15-15-15 composite fertilizer quality, and 15-15-15 composite fertilizer particle diameter is 2～5mm); The water holding controlled release fertilizer inner layer film of said double membrane structure is a polymer protection tunic material, has the nutrient controlled release properties, and outer membrane is the water conservation layer, has good water retention property.
A kind of preparation method of moisture-retention sustained release and release control fertilizer, this method steps is following,
(1) take by weighing monomer, said monomer is Acrylic Acid Monomer and acrylic amide, and the Acrylic Acid Monomer quality accounts for 58% of monomer total mass, and the acrylic amide quality accounts for 42% of monomer total mass, takes by weighing Acrylic Acid Monomer 25g, acrylic amide 18g; Acrylic Acid Monomer is put into beaker; In ice-water bath; Be 10% aqueous sodium hydroxide solution slowly, make acrylic acid degree of neutralization reach 70%, in above-mentioned solution, add acrylic amide, linking agent N to wherein adding massfraction; N-methylene-bisacrylamide 0.028g (the linking agent quality is 0.065% with the ratio of monomer total mass), initiator ammonium persulfate 0.081g (the initiator quality is 0.188% with the ratio of monomer total mass); And add 22g water, and making the shared massfraction of aqueous phase monomer is 66%, fully dissolving joins mixing solutions in the tap funnel after mixing;
(2) in reaction kettle, add emulsifying agent Span-80 and external phase hexanaphthene; According to the quality of emulsifying agent Span-80 and the ratio of monomer total mass is 0.064, adds 2.75g emulsifying agent Span-80, makes the water oil ratio hexanaphthene by mass ratio: water=6.38; Add hexanaphthene 180ml; Tap funnel, whipping appts, the reflux condensing tube of step (1) are installed on the reaction kettle, stir, emulsifying agent is fully dissolved;
(3) under nitrogen protection, the drips of solution in the tap funnel is added in the reaction kettle, stir; Emulsification is warming up to 55 ℃, in reaction kettle, drips sodium sulfite solution; Wherein, the ratio of the quality of sodium sulfite anhy 96 and monomer total mass is 0.093% (the 0.04g sodium sulfite anhy 96 joins the solution that forms in the 10ml water, and sodium sulfite solution concentration is 4g/L); Reaction 5h obtains anti-phase suspension liquid, is water conservation coating suspension-s;
(4) in encapsulation tool, add the polyurethane coated 15-15-15 composite fertilizer 225g of polymer coat fertilizer (the polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer); 90 ℃ of bulging hot blasts; Make the even fluidisation of fertilizer, the ratio according to water conservation coating suspension quality and polymer coat fertilizer quality is 0.20 then, adds water conservation coating suspension-s 45g; Nozzle with pressure 0.3MPa evenly is sprayed onto the fertiliser granulates surface with water conservation coating suspension-s; Continue the drum hot blast, drying obtains moisture-retention sustained release and release control fertilizer.
Adopt water-extraction method to measure the controlled release properties of the moisture-retention sustained release and release control fertilizer of present embodiment preparation, the initial stage solubility rate is 1.5%, and the controlled release phase is 82 days.Record its multiplying power of inhaling zero(ppm) water 628 times under 25 ℃ for its water conservation layer.
Claims (7)
1. moisture-retention sustained release and release control fertilizer; It is characterized in that said moisture-retention sustained release and release control fertilizer integrates the control nutrient and discharges and water retaining function, is a kind of fertilizer with nutrient slow controlled release, drought resisting, the structure of economizing on water and improve the soil; Said moisture-retention sustained release and release control fertilizer is a kernel with the polymer coat fertilizer; The water conservation layer is outer, has formed a kind of water holding controlled release fertilizer of double membrane structure, and said polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer; The water holding controlled release fertilizer inner layer film of said double membrane structure is a polymer protection tunic material, has the nutrient controlled release properties, and outer membrane is the water conservation layer, has good water retention property;
The preparation method of said moisture-retention sustained release and release control fertilizer is following:
(1) take by weighing monomer, said monomer is Acrylic Acid Monomer and acrylic amide, and the Acrylic Acid Monomer quality accounts for 20～70% of monomer total mass, and the acrylic amide quality accounts for 30～80% of monomer total mass; Acrylic Acid Monomer is put into beaker; In ice-water bath,, make acrylic acid degree of neutralization reach 65～70% slowly to wherein adding sodium hydroxide solution; In above-mentioned solution, add acrylic amide, linking agent, initiator; And add water, and making the shared massfraction of aqueous phase monomer is 20～70%, fully dissolving joins mixing solutions in the tap funnel after mixing;
(2) in reaction kettle, add emulsifying agent Span-80 and external phase hexanaphthene; The ratio of the quality of emulsifying agent Span-80 and monomer total mass is 0.03～0.10; The add-on of hexanaphthene is for to make the water oil ratio hexanaphthene by mass ratio: water=(1: 2)～(9: 1); Tap funnel, whipping appts, the reflux condensing tube of step (1) are installed on the reaction kettle, stir, emulsifying agent is fully dissolved;
(3) under nitrogen protection, the drips of solution in the tap funnel is added in the reaction kettle, stir; Emulsification is warming up to 40～60 ℃, in reaction kettle, drips sodium sulfite solution; Wherein, the ratio of the quality of sodium sulfite anhy 96 and monomer total mass is 0.08～0.15%, reaction 2～5h; Obtain anti-phase suspension liquid, be water conservation coating suspension-s;
(4) in encapsulation tool, add the polymer coat fertilizer, said polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer, 60～90 ℃ of bulging hot blasts; Make the even fluidisation of fertilizer, the ratio according to water conservation coating suspension quality and polymer coat fertilizer quality is 0.05～0.20 then, adds water conservation coating suspension-s; Nozzle with pressure 0.1～0.3MPa evenly is sprayed onto the fertiliser granulates surface with water conservation coating suspension-s; Continue the drum hot blast, drying obtains moisture-retention sustained release and release control fertilizer.
2. moisture-retention sustained release and release control fertilizer according to claim 1; It is characterized in that; Said polymer protection tunic material is one or more in polyolefine, urethane, polyacrylic ester, polyester, polyureas or the polycarbonate, and resist membrane material amount accounts for 2～15% of polymer coat fertilizer quality.
3. moisture-retention sustained release and release control fertilizer according to claim 1; It is characterized in that; Said granulated fertilizer is water miscible granulated fertilizer, and particle diameter is 2～5mm, perhaps contains the straight fertilizer or the composite fertilizer of trace elements iron, manganese, boron, zinc, copper or molybdenum for straight fertilizer, composite fertilizer; Comprise urea, volatile salt, an ammonium nitrate, ammonium sulfate, one or more in vitriolate of tartar, Repone K, saltpetre, Secondary ammonium phosphate or the primary ammonium phosphate.
4. the preparation method of a moisture-retention sustained release and release control fertilizer is characterized in that, this method steps is following,
(1) take by weighing monomer, said monomer is Acrylic Acid Monomer and acrylic amide, and the Acrylic Acid Monomer quality accounts for 20～70% of monomer total mass, and the acrylic amide quality accounts for 30～80% of monomer total mass; Acrylic Acid Monomer is put into beaker; In ice-water bath,, make acrylic acid degree of neutralization reach 65～70% slowly to wherein adding sodium hydroxide solution; In above-mentioned solution, add acrylic amide, linking agent, initiator; And add water, and making the shared massfraction of aqueous phase monomer is 20～70%, fully dissolving joins mixing solutions in the tap funnel after mixing;
(2) in reaction kettle, add emulsifying agent Span-80 and external phase hexanaphthene; The ratio of the quality of emulsifying agent Span-80 and monomer total mass is 0.03～0.10; The add-on of hexanaphthene is for to make the water oil ratio hexanaphthene by mass ratio: water=(1: 2)～(9: 1); Tap funnel, whipping appts, the reflux condensing tube of step (1) are installed on the reaction kettle, stir, emulsifying agent is fully dissolved;
(3) under nitrogen protection, the drips of solution in the tap funnel is added in the reaction kettle, stir; Emulsification is warming up to 40～60 ℃, in reaction kettle, drips sodium sulfite solution; Wherein, the ratio of the quality of sodium sulfite anhy 96 and monomer total mass is 0.08～0.15%, reaction 2～5h; Obtain anti-phase suspension liquid, be water conservation coating suspension-s;
(4) in encapsulation tool, add the polymer coat fertilizer, said polymer coat fertilizer is a polymer protection tunic material coatedparticles fertilizer, 60～90 ℃ of bulging hot blasts; Make the even fluidisation of fertilizer, the ratio according to water conservation coating suspension quality and polymer coat fertilizer quality is 0.05～0.20 then, adds water conservation coating suspension-s; Nozzle with pressure 0.1～0.3MPa evenly is sprayed onto the fertiliser granulates surface with water conservation coating suspension-s; Continue the drum hot blast, drying obtains moisture-retention sustained release and release control fertilizer.
5. the preparation method of moisture-retention sustained release and release control fertilizer according to claim 4 is characterized in that, said linking agent is a N,N methylene bis acrylamide, and the linking agent quality is 0.06～0.09% with the ratio of monomer total mass.
6. the preparation method of moisture-retention sustained release and release control fertilizer according to claim 4 is characterized in that, said initiator is an ammonium persulphate, 0.15～0.225% of the ratio of initiator quality and monomer total mass.
7. the preparation method of moisture-retention sustained release and release control fertilizer according to claim 4 is characterized in that, said sodium sulfite solution is that concentration is 0.1～5g/L.
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| CN112624853B (en) * | 2020-12-31 | 2022-10-11 | 龙蟒大地农业有限公司 | Water-retaining compound fertilizer and preparation method thereof |
| CN112624865B (en) * | 2020-12-31 | 2022-03-25 | 龙蟒大地农业有限公司 | Water-retention slow-release fertilizer and preparation method thereof |
| CN115109595B (en) * | 2022-06-23 | 2024-05-07 | 北京晋荣农业科技有限公司 | Saline-alkali soil composite soil conditioner and preparation method and application thereof |
| CN115724698A (en) * | 2022-11-30 | 2023-03-03 | 中昇南阳生物科技有限公司 | Acidic soil conditioner and preparation method thereof |
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| US5628813A (en) * | 1992-12-21 | 1997-05-13 | Exxon Chemical Patents Inc. | Abrasion resistant topcoats for control release coatings |
| CN101367688A (en) * | 2008-09-25 | 2009-02-18 | 中国农业大学 | Controlled release water holding raise seedling culture medium for cucumber and method of preparing the same |
-
2009
- 2009-03-31 CN CN2009100812893A patent/CN101508616B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5628813A (en) * | 1992-12-21 | 1997-05-13 | Exxon Chemical Patents Inc. | Abrasion resistant topcoats for control release coatings |
| CN101367688A (en) * | 2008-09-25 | 2009-02-18 | 中国农业大学 | Controlled release water holding raise seedling culture medium for cucumber and method of preparing the same |
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| CN101508616A (en) | 2009-08-19 |
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