JPS62235284A - Prevention of urea solidification - Google Patents
Prevention of urea solidificationInfo
- Publication number
- JPS62235284A JPS62235284A JP61075979A JP7597986A JPS62235284A JP S62235284 A JPS62235284 A JP S62235284A JP 61075979 A JP61075979 A JP 61075979A JP 7597986 A JP7597986 A JP 7597986A JP S62235284 A JPS62235284 A JP S62235284A
- Authority
- JP
- Japan
- Prior art keywords
- urea
- caking
- present
- prevention
- carbon atoms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims description 31
- 239000004202 carbamide Substances 0.000 title claims description 31
- 230000002265 prevention Effects 0.000 title description 6
- 230000008023 solidification Effects 0.000 title 1
- 238000007711 solidification Methods 0.000 title 1
- 150000001875 compounds Chemical class 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 229910021645 metal ion Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 125000004429 atom Chemical group 0.000 claims 1
- 238000000034 method Methods 0.000 description 22
- 230000000694 effects Effects 0.000 description 11
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 10
- 239000002245 particle Substances 0.000 description 7
- 239000003337 fertilizer Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- -1 aliphatic amines Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001734 carboxylic acid salts Chemical class 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 235000012222 talc Nutrition 0.000 description 2
- BTJFTHOOADNOOS-UHFFFAOYSA-N 2-hydroxynonanoic acid Chemical compound CCCCCCCC(O)C(O)=O BTJFTHOOADNOOS-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000001692 EU approved anti-caking agent Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- JJCSYJVFIRBCRI-UHFFFAOYSA-K aluminum;hexadecanoate Chemical compound [Al].CCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCC([O-])=O JJCSYJVFIRBCRI-UHFFFAOYSA-K 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- OUOYUKOMZFADNU-UHFFFAOYSA-L barium(2+);decanoate Chemical compound [Ba+2].CCCCCCCCCC([O-])=O.CCCCCCCCCC([O-])=O OUOYUKOMZFADNU-UHFFFAOYSA-L 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- HIAAVKYLDRCDFQ-UHFFFAOYSA-L calcium;dodecanoate Chemical compound [Ca+2].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O HIAAVKYLDRCDFQ-UHFFFAOYSA-L 0.000 description 1
- HRBZRZSCMANEHQ-UHFFFAOYSA-L calcium;hexadecanoate Chemical compound [Ca+2].CCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCC([O-])=O HRBZRZSCMANEHQ-UHFFFAOYSA-L 0.000 description 1
- YBGHFLPNIGPGHX-UHFFFAOYSA-N calcium;octan-1-olate Chemical compound [Ca+2].CCCCCCCC[O-].CCCCCCCC[O-] YBGHFLPNIGPGHX-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- OBQVOBQZMOXRAL-UHFFFAOYSA-L magnesium;docosanoate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCCCCCC([O-])=O OBQVOBQZMOXRAL-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Fertilizers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は固結性肥料である尿素の固結防止方法に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing caking of urea, which is a caking fertilizer.
尿素は、保存中に固結を起こし、作業性を悪くする欠点
がある。この為、これまで固結防止対策が種々検討され
、多くの提案がなされており、大別すると以下の通りで
ある。Urea has the disadvantage of causing caking during storage, which impairs workability. For this reason, various measures to prevent caking have been studied and many proposals have been made, which can be broadly classified as follows.
（１） 珪藻土、タルク、カオリン、ケイ酸粉末のご
とき不溶性微粉末を尿素と混合し、尿素の直接接触を防
止する方法。(1) A method of mixing insoluble fine powder such as diatomaceous earth, talc, kaolin, or silicic acid powder with urea to prevent direct contact with urea.
（２）鉱物油、水溶性高分子などで尿素の表面をコーテ
ィングして防水性皮膜を形成せしめ、水分の出入りを遮
断し、粒子間の橋かけ性結晶の生成を防止する方法。(2) A method in which the surface of urea is coated with mineral oil, water-soluble polymer, etc. to form a waterproof film, which blocks moisture in and out and prevents the formation of cross-linking crystals between particles.
（３）脂肪族アミン及び脂肪族ジアミンならびにこれら
の塩をスプレー処理し単分子膜を尿素の表面に形成させ
尿素の表面の性質を変え、固結しにくくする方法。(3) A method in which aliphatic amines, aliphatic diamines, and salts thereof are spray-treated to form a monomolecular film on the surface of urea, thereby changing the properties of the surface of urea and making it difficult to solidify.
（４） 高分子と陰イオン界面活性剤との複合体の結
晶変性作用によりその結晶状態を変え、固結を防止する
方法。(4) A method of preventing caking by changing the crystalline state of a complex of a polymer and an anionic surfactant by crystal modification action.
（５）溶融尿素に対してホルマリンを加え、一部を尿素
ホルマリン樹脂にしたのち造粒することにより吸湿性を
防止すると同時に造粒尿素粒子の硬度を高める方法。(5) A method of preventing hygroscopicity and increasing the hardness of granulated urea particles at the same time by adding formalin to molten urea, converting a portion into urea-formalin resin, and then granulating it.
このことにより流通における微粉形成を防ぐことができ
、固結を防止することができる。This can prevent the formation of fine powder during distribution and can prevent caking.
しかしながら、上記の方法では必ずしも満足なものとは
言い難い。即ち、（１）、 ＋２１の方法では数％添加
しても充分な固結防止効果が得られないことがあり、（
３）の方法では、固体の脂肪族アミンを一様に肥料に被
覆することが難しく、強いアミン臭とその皮膚刺激性の
ため使用が困難である。However, the above method is not necessarily satisfactory. That is, in methods (1) and +21, even if a few percent is added, a sufficient anti-caking effect may not be obtained; (
In method 3), it is difficult to uniformly coat the solid aliphatic amine on the fertilizer, and it is difficult to use because of the strong amine odor and skin irritation.
（４）の方法は、粒径の比較的小さいものには効果があ
るものの、やや大きい粒径を持つ尿素には効力は弱い。Although method (4) is effective for relatively small particle sizes, it is less effective for urea that has somewhat larger particle sizes.
（５）の方法も防結性が充分でないと同時にホルマリン
の毒性上の問題をかかえている。Method (5) also does not have sufficient anti-caking properties and also has problems with the toxicity of formalin.
そこで本発明者らは上記の欠点のない優れた固結防止方
法について鋭意研究を行った結果、本発明を完成した。Therefore, the present inventors conducted intensive research on an excellent method for preventing caking that does not have the above-mentioned drawbacks, and as a result, completed the present invention.
即ち本発明は、一般式（１）で表される化合物を尿素に
添加し混合したのち加熱を行うか、あるいは該化合物を
溶融尿素に添加したのち造粒を行うことを特徴とする尿
素の固結防止方法に関するものである。That is, the present invention provides a method for solidifying urea, which is characterized in that the compound represented by the general formula (1) is added to urea, mixed and then heated, or the compound is added to molten urea and then granulated. The present invention relates to a method for preventing freezing.
（Ｒ−Ｃ００） ｌ１Ｍ （ｔｌ（式（１）中、
Ｒは炭素数４〜３０であるヒドロキシル基を有していて
もよい直鎖又は分枝鎖アルキル又はアルケニル基を表し
、ｉは原子価ｎの金属イオンを表し、ｎは２又は３であ
る。）本発明に係る一般式（１）で表される化合物にお
いてアルキル又はアルケニル基の炭素数及び対イオンの
種類が極めて重要な意味を有する。即ち炭素数３以下の
アルキル基又はアルケニル基を有するカルボン酸塩では
充分な効果は得られず、炭素数４以上になって初めて満
足のゆく固結防止効果が得られる。特に炭素数８以上の
アルキル又はアルケニル基を有するカルボン酸塩が好ま
しい。(R-C00) l1M (tl (in formula (1),
R represents a straight chain or branched alkyl or alkenyl group which may have a hydroxyl group having 4 to 30 carbon atoms, i represents a metal ion having a valence of n, and n is 2 or 3. ) In the compound represented by the general formula (1) according to the present invention, the number of carbon atoms in the alkyl or alkenyl group and the type of counter ion have extremely important meanings. That is, a sufficient effect cannot be obtained with a carboxylic acid salt having an alkyl group or an alkenyl group having 3 or less carbon atoms, and a satisfactory anti-caking effect can only be obtained when the number of carbon atoms is 4 or more. In particular, carboxylic acid salts having an alkyl or alkenyl group having 8 or more carbon atoms are preferred.
例えば、オクチル酸カルシウム、デカン酸バリウム、４
−ヒドロキシノナン酸マグネシウム、ラウリル酸カルシ
ウム、パルミチン酸カルシウム、パルミチン酸アルミニ
ウム、ステアリン酸カルシウム、ステアリン酸亜鉛、ワ
シルイン酸ストロンチウム、ベヘニン酸マグネシウムな
どを挙げることができる。For example, calcium octylate, barium decanoate, 4
-Magnesium hydroxynonanoate, calcium laurate, calcium palmitate, aluminum palmitate, calcium stearate, zinc stearate, strontium wasylate, magnesium behenate, and the like.
また、対イオンの種類としては、例えば、ベリリウム、
マグネシウム、カルシウム、ストロンチウム、バリウム
等のアルカリ土類金属、アルミニウム、亜鉛、銅、鉄、
スズなどを挙げることができる。In addition, examples of types of counter ions include beryllium,
Alkaline earth metals such as magnesium, calcium, strontium, barium, aluminum, zinc, copper, iron,
Examples include tin.
本発明の固結防止方法は、直接尿素に一般式（１）で示
される固結防止剤を添加し、コーティングドラムやコー
ティングパンにより処理するなど、表面を充分に被覆す
る様に混合するか、あるいはマシン油などに希釈して肥
料にスプレーする表面処理的使用法と造粒前の溶融状態
に加える方法とに大別することができるが、表面処理的
使用法の場合には、処理された尿素を加熱する事によっ
てはじめて、充分な固結防止効果を得る事ができる。加
熱温度は５０℃〜１３０℃の範囲が望ましいが、更に好
ましくは８０℃〜１３０℃の範囲でより高い固結防止効
果を得る事ができる。The anti-caking method of the present invention includes directly adding an anti-caking agent represented by the general formula (1) to urea, and mixing the mixture to sufficiently coat the surface, such as by treating with a coating drum or coating pan. Alternatively, it can be roughly divided into surface treatment methods, in which the fertilizer is diluted with machine oil and sprayed, and methods in which it is added to the molten state before granulation. Only by heating urea can a sufficient anti-caking effect be obtained. The heating temperature is preferably in the range of 50°C to 130°C, and more preferably in the range of 80°C to 130°C to obtain a higher caking prevention effect.
本発明の固結防止剤の処理量は、尿素に対し、０．０１
〜５重量％が好ましく、更に好ましくは０．１０〜２重
量％である。The treatment amount of the anti-caking agent of the present invention is 0.01 to urea.
The content is preferably from 5% by weight, more preferably from 0.10 to 2% by weight.
また、本発明の実施に当たって、本発明の一般式（１）
で示される化合物の他にクレー、タルク、ケイソウ土な
どの無機物やホルマリンを併用すれば、更に優れた固結
防止性を示す。特に、ホルマリンを併用した場合、造粒
時のダスト発生率が低くなるとか、１粒あたりの硬度が
強くなる等の効果があり、製造上も良い効果を得る事が
できる。In addition, in carrying out the present invention, general formula (1) of the present invention
If an inorganic substance such as clay, talc, diatomaceous earth, or formalin is used in combination with the compound shown above, even better anti-caking properties will be exhibited. In particular, when formalin is used in combination, there are effects such as lowering the dust generation rate during granulation and increasing the hardness per granule, and good effects can also be obtained in terms of manufacturing.
このように本発明の固結防止方法を適用する事により、
尿素の固結性が著しく抑制される事がわかった。By applying the caking prevention method of the present invention in this way,
It was found that the caking property of urea was significantly suppressed.
また、本発明の固結防止方法は、従来ややもすると固結
防止効果の得にくかった粒径の太きい尿素に対しても優
れた固結防止効果を得る事ができる。In addition, the method for preventing caking of the present invention can provide an excellent anti-caking effect even for urea having a large particle size, for which it has been difficult to obtain an anti-caking effect in the past.
更に本発明の一般式（１）で示される化合物は、カルボ
キシル基の官能基を持っており、長鎖アルキル又はアル
ケニル基を有している点で、安全性はホルマリンに比べ
著しく改善される。Furthermore, the compound represented by the general formula (1) of the present invention has a carboxyl functional group and has a long-chain alkyl or alkenyl group, and therefore has significantly improved safety compared to formalin.
脂肪酸の金属塩を固結防止剤として、他の肥料に使用す
る方法は、従来にもあったものの、添加する微粉末を完
全に肥料表面に付着させる事が困難であり、そのため、
充分な固結防止効果が得られなかった。Although there has been a method of using fatty acid metal salts as anti-caking agents in other fertilizers, it is difficult to make the fine powder to be added completely adhere to the surface of the fertilizer.
A sufficient anti-caking effect could not be obtained.
本発明の固結防止方法では、脂肪酸の金属塩が処理後加
熱されるか、溶融尿素中に添加される事によって、尿素
表面に疎水基（Ｒ−）を外に向けた分子の配列層を形成
せしめ、尿素の表面性状を著しく改善し、表面滑性など
を大きくする事によって、防結性が発現しているものと
考えられるが、その詳細は明らかでない。In the caking prevention method of the present invention, a metal salt of a fatty acid is heated after treatment or added to molten urea, thereby forming an arrayed layer of molecules with hydrophobic groups (R-) facing outward on the urea surface. It is thought that the anti-caking property is achieved by significantly improving the surface properties of urea and increasing its surface smoothness, but the details are not clear.
以下に実施例により本発明を説明するが、本発明は、こ
れら実施例に限定されるものではない。The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.
実施例１
尿素として、大粒尿素（三井東圧側製、直径３．５ ｍ
ｍ）を用い、本発明の固結防止剤を０．１％混合処理し
、その後１３０℃の定温下に３０分間放置した。放冷後
、内径４ｃｍの円筒状硬質塩ビモールドに４５ｇを充填
し、２ｋｇ／ｃｍ２加圧後、３０℃、８０％相対湿度に
１４日間放置後取り出し、テンシロン圧縮強度計で破壊
強度を求め、下式により固結防止率を求めた。また、処
理後、加熱を行わない場合についても同様に測定を行っ
た。Example 1 As urea, large grain urea (manufactured by Mitsui Toatsu side, diameter 3.5 m
m) was used to mix 0.1% of the anti-caking agent of the present invention, and then left at a constant temperature of 130° C. for 30 minutes. After cooling, 45g was filled into a cylindrical rigid PVC mold with an inner diameter of 4cm, and after pressurizing 2kg/cm2, it was left at 30℃ and 80% relative humidity for 14 days, then taken out, and the breaking strength was determined using a Tensilon compressive strength meter. The caking prevention rate was calculated using the formula. In addition, measurements were also made in the same manner in the case where no heating was performed after the treatment.
結果を表１に示す。The results are shown in Table 1.
実施例２
溶融状態の尿素に、本発明の固結防止剤を０．１％加え
、その後、流動床造粒法により、尿素の造粒を行った。Example 2 0.1% of the anti-caking agent of the present invention was added to molten urea, and then the urea was granulated by a fluidized bed granulation method.
その結果、直径約３．２ｍｍのほぼ均一な粒径分布をも
った大粒尿素がダスト等の発生も少なく効率よく製造さ
れた。得られた尿素を内径４ｃｍの円筒状硬質塩ビモー
ルドに４５ｇを充填し、２ｋｇ／ｃｍ”加圧後、３０℃
、８０％相対湿度に１４日間放置後取り出し、テンシロ
ン圧縮強度計で破壊強度を求め、前弐に従って固結防止
率を求めた。結果を表２に示す。As a result, large particles of urea having a diameter of about 3.2 mm and a substantially uniform particle size distribution were efficiently produced with little generation of dust. 45 g of the obtained urea was filled into a cylindrical hard PVC mold with an inner diameter of 4 cm, and after pressurizing it to 2 kg/cm, it was heated at 30°C.
After being left at 80% relative humidity for 14 days, it was taken out, and the breaking strength was determined using a Tensilon compressive strength meter, and the caking prevention rate was determined according to the previous section. The results are shown in Table 2.
表 ２Table 2
Claims (1)
したのち加熱を行うか、あるいは該化合物を溶融尿素に
添加したのち造粒を行うことを特徴とする尿素の固結防
止方法。 （Ｒ−ＣＯＯ）ｎＭ（１） （式（１）中、Ｒは炭素数４〜３０であるヒドロキシル
基を有していてもよい直鎖又は分枝鎖アルキル又はアル
ケニル基を表し、Ｍは原子価ｎの金属イオンを表し、ｎ
は２又は３である。）[Claims] 1. A urea characterized by adding a compound represented by the general formula (1) to urea and heating the mixture, or adding the compound to molten urea and then granulating it. How to prevent caking. (R-COO)nM(1) (In formula (1), R represents a straight-chain or branched alkyl or alkenyl group that may have a hydroxyl group having 4 to 30 carbon atoms, and M is an atom Represents a metal ion of valence n, where n
is 2 or 3. )
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61075979A JPS62235284A (en) | 1986-04-02 | 1986-04-02 | Prevention of urea solidification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61075979A JPS62235284A (en) | 1986-04-02 | 1986-04-02 | Prevention of urea solidification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62235284A true JPS62235284A (en) | 1987-10-15 |
Family
ID=13591881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61075979A Pending JPS62235284A (en) | 1986-04-02 | 1986-04-02 | Prevention of urea solidification |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62235284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009545507A (en) * | 2006-05-31 | 2009-12-24 | オーエムエス・インヴェストメンツ・インコーポレイティッド | Composition and method for inhibiting solidification in urea-containing fertilizer |
| JP2014218381A (en) * | 2013-05-01 | 2014-11-20 | 日油株式会社 | Antiblocking agent for nitrogen fertilizer, and nitrogen fertilizer composition |
-
1986
- 1986-04-02 JP JP61075979A patent/JPS62235284A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009545507A (en) * | 2006-05-31 | 2009-12-24 | オーエムエス・インヴェストメンツ・インコーポレイティッド | Composition and method for inhibiting solidification in urea-containing fertilizer |
| JP2014218381A (en) * | 2013-05-01 | 2014-11-20 | 日油株式会社 | Antiblocking agent for nitrogen fertilizer, and nitrogen fertilizer composition |
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