JPH0460956B2 - - Google Patents
Info
- Publication number
- JPH0460956B2 JPH0460956B2 JP5184585A JP5184585A JPH0460956B2 JP H0460956 B2 JPH0460956 B2 JP H0460956B2 JP 5184585 A JP5184585 A JP 5184585A JP 5184585 A JP5184585 A JP 5184585A JP H0460956 B2 JPH0460956 B2 JP H0460956B2
- Authority
- JP
- Japan
- Prior art keywords
- sulfate
- waste acid
- ammonium sulfate
- mma
- ammonia
- 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.)
- Expired
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- 239000002253 acid Substances 0.000 claims description 38
- 239000002699 waste material Substances 0.000 claims description 37
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 32
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 32
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 32
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 32
- 238000004898 kneading Methods 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 239000003337 fertilizer Substances 0.000 claims description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 14
- PWSPYJYNHXXPRD-UHFFFAOYSA-L N.S(=O)(=O)([O-])[O-].[Mg+2] Chemical compound N.S(=O)(=O)([O-])[O-].[Mg+2] PWSPYJYNHXXPRD-UHFFFAOYSA-L 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000032050 esterification Effects 0.000 claims description 3
- 238000005886 esterification reaction Methods 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 20
- 239000000347 magnesium hydroxide Substances 0.000 description 20
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 20
- 239000002002 slurry Substances 0.000 description 16
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 7
- 238000005187 foaming Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 244000037666 field crops Species 0.000 description 2
- 238000010413 gardening Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- -1 sulfuric acid magnesium ammonia Chemical compound 0.000 description 1
Landscapes
- Fertilizers (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は硫酸苦土アンモニア肥料の製造方法に
関し、併せて廃酸を有効利用するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing a sulfuric acid magnesium ammonia fertilizer, and also makes effective use of waste acid.
（従来の技術）
従来メタクリル酸メチル製造時排出される硫酸
水素アンモニウムおよび硫酸を主成分とする廃酸
に直接アンモニアガスを加えて硫安を製造してい
たがコスト高であつた。最近水溶性のマグネシウ
ム肥料がその速効性の故に畑作やハウス園芸等に
注目されている。そこでメタクリル酸メチル製造
時のエステル化工程で排出される硫酸水素アンモ
ニウムおよび硫酸を主成分とする廃酸から硫酸苦
土アンモニア肥料を製造しようとするもので、こ
の廃酸の利用についての新しい方向を見出そうと
するものである。(Prior Art) Conventionally, ammonium sulfate was produced by directly adding ammonia gas to waste acid containing ammonium hydrogen sulfate and sulfuric acid as the main components discharged during the production of methyl methacrylate, but this was expensive. Recently, water-soluble magnesium fertilizers have been attracting attention for field crops and greenhouse gardening because of their fast-acting properties. Therefore, the project aims to produce ammonia sulfate fertilizer from ammonium hydrogen sulfate and waste acids whose main components are sulfuric acid, which are discharged during the esterification process during the production of methyl methacrylate. That's what we're trying to find out.
ところで硫酸苦土アンモニアを合成するには成
分上メタクリル酸メチルの製造工程で生ずる廃酸
（以下MMA廃酸と称する）に水酸化マグネシウ
ムと硫安を混合反応させることが最適と考えられ
る。 By the way, in order to synthesize ammonia sulfate, it is considered optimal to mix and react magnesium hydroxide and ammonium sulfate with waste acid produced in the manufacturing process of methyl methacrylate (hereinafter referred to as MMA waste acid).
（発明の目的）
MMA廃酸の処理方法としての一つの解決とし
て、最近注目されている速効性の高い硫酸苦土ア
ンモニア肥料をこの廃酸を利用して製造しようと
するものである。(Purpose of the Invention) As a solution to the treatment of MMA waste acid, the present invention attempts to produce a fast-acting magnesium sulfate ammonia fertilizer, which has recently been attracting attention, by using this waste acid.
（発明が解決しようとする問題点）
硫酸苦土アンモニアは（NH4）2Mg（SO4）2nH2
Ｏであり、ｎ＝０，１，４，６である。MMA廃
酸は概ね下記の組成のものである。(Problem to be solved by the invention) Magnesium sulfate ammonia is (NH 4 ) 2 Mg (SO 4 ) 2 nH 2
O, and n=0, 1, 4, 6. MMA waste acid generally has the following composition.
酸性硫酸アンモニア 44〜52
硫酸 15〜20
水分 23〜25
有機物その他 数
計 100（重量％）
この廃酸は製品（MMA）の約2.5〜3.0倍（重
量）という大量に及んでいて、この廃酸処理がメ
タクリル酸メチル製造上の大きなキーポイントと
なつている。 Acidic ammonia sulfate 44-52 Sulfuric acid 15-20 Moisture 23-25 Organic matter and others Number Total 100 (wt%) This waste acid is in a large amount, about 2.5 to 3.0 times the product (MMA) (by weight). Processing is a key point in the production of methyl methacrylate.
このため最近は原料青酸の品薄の関係もあり製
法の転換が相次いで行われつつある。しかし青酸
原料の供給が安定している場合にはこの廃酸の処
理が有効に行われれば新規のプロセスに充分対抗
し得るものであり本方法はその有効な処理方法と
して硫酸苦土アンモニア肥料の製造を目指すもの
である。 For this reason, production methods have recently been changed one after another, partly due to the shortage of raw material hydrocyanic acid. However, if the supply of hydrocyanic acid raw material is stable, if this waste acid is treated effectively, it will be sufficient to compete with the new process, and this method is an effective treatment method that uses sulfate magnesium ammonia fertilizer. It is aimed at manufacturing.
MMA廃酸を利用して硫酸苦土アンモニアを製
造するには廃酸に水酸化マグネシウムと硫安を混
合するのが最適で、これらの原料の最適な混合比
の一例は下記の通りである。尚、この際のMMA
酸の組成は
酸性硫酸アンモニア 51（重量％）
硫酸 18
水分 29
のものである。 To produce magnesium sulfate ammonia using MMA waste acid, it is optimal to mix magnesium hydroxide and ammonium sulfate with the waste acid, and an example of the optimal mixing ratio of these raw materials is as follows. In addition, MMA at this time
The composition of the acid is: acidic ammonia sulfate 51% (wt%) sulfuric acid 18% water 29%.
MMA廃酸 65
水酸化マグネシウム 17
硫安 18
計 100（重量％）
この反応によつて粉末状の固体を生成させるこ
とを目的とするが、MMA廃酸と水酸化マグネシ
ウムとの反応は激しい発熱と発泡を伴うために出
来るだけ反応を和げることが大切である。 MMA waste acid 65 Magnesium hydroxide 17 Ammonium sulfate 18 Total 100 (wt%) The purpose of this reaction is to produce a powdery solid, but the reaction between MMA waste acid and magnesium hydroxide causes intense heat generation and foaming. It is important to soften the reaction as much as possible to avoid this.
MMA廃酸に水酸化マグネシウムを直接反応さ
せると反応が急激すぎて発泡が激しく、また生成
スラリーは急速に固化するため混合反応器から捏
和機への輸送がうまくゆかず、そのうえ硫安との
反応も不充分で硫酸苦土アンモニアの生産量も少
く、パウダー状固体にならない。本発明はこれら
の点を考慮した上でその最適条件を決定しようと
するものである。 If magnesium hydroxide is directly reacted with MMA waste acid, the reaction will be too rapid, resulting in severe foaming, and the resulting slurry will solidify rapidly, making it difficult to transport it from the mixing reactor to the kneading machine. The amount of ammonia sulfate produced is also insufficient, and it does not become a powdery solid. The present invention attempts to determine the optimum conditions by taking these points into consideration.
（問題点を解決するための手段）
本発明は上述のように反応条件を種々実験した
結果、メタクリル酸メチル製造時のエステル化工
程で排出される硫酸水素アンモニウムおよび硫酸
を主成分とする廃酸を50°〜100℃に保ちつつ、全
反応量の５〜50重量％相当の硫安と水酸化マグネ
シウムの全反応量を混和し、捏和機に流し込むと
同時に残りの硫安を加え一定時間捏和することに
より硫酸苦土アンモニア肥料を粉末状で製造しよ
うとするものである。(Means for Solving the Problems) As a result of various experiments on reaction conditions as described above, the present invention is based on ammonium hydrogen sulfate and waste acid mainly composed of sulfuric acid and ammonium hydrogen sulfate discharged in the esterification process during the production of methyl methacrylate. While keeping the temperature at 50° to 100°C, mix the total reaction amount of ammonium sulfate and magnesium hydroxide equivalent to 5 to 50% by weight of the total reaction amount, pour into a kneading machine, and at the same time add the remaining ammonium sulfate and knead for a certain period of time. By doing so, it is intended to produce sulfate magnesium ammonia fertilizer in powder form.
このようにすることにより反応は穏やかで生成
したスラリーの固化は遅くなり、残りの硫安を捏
和機へスラリーとともに加えると捏和初期はスラ
リー状を保つているため、均一な混合が行われ、
その混合スラリーは15〜20分という短時間でドラ
イヤーを使用しなくても粉末状に固化する。この
硫安の二段添加における比率は外気温度やMMA
廃酸温度により異り、それらの温度が低くければ
最初の硫安添加量を少なめにし、それ等の温度が
高かければ最初の添加硫安量を多くすればよく、
その比率の適正量は第一段目が全硫安量の５〜50
重量％の範囲にあることが実験の結果明らかにな
つた。これにより本発明の最も大きな特徴は硫安
の添加を二段に分けて外気温度やMMA廃酸の温
度に応じてその量を調整する点にあるといえる。 By doing this, the reaction is gentle and the solidification of the generated slurry is slowed down, and when the remaining ammonium sulfate is added to the kneading machine together with the slurry, the slurry remains in the initial stage of kneading, so uniform mixing is achieved.
The mixed slurry solidifies into a powder in just 15 to 20 minutes without the use of a dryer. The ratio in this two-stage addition of ammonium sulfate depends on the outside temperature and MMA.
It depends on the temperature of the waste acid; if the temperature is low, the initial amount of ammonium sulfate added should be small, and if the temperature is high, the initial amount of ammonium sulfate added should be large.
The appropriate amount of the ratio is that the first stage is 5 to 50 of the total amount of ammonium sulfate.
As a result of the experiment, it was found that the amount of carbon dioxide is within the range of % by weight. From this, it can be said that the most significant feature of the present invention is that the addition of ammonium sulfate is divided into two stages and the amount is adjusted according to the outside air temperature and the temperature of the MMA waste acid.
なおMMA廃酸の温度は100℃以上ではあまり
にも反応が激しいので均一な反応が行われず、そ
の上発泡もすさまじく、一方50℃以下では固化反
応の進行が遅すぎて不利なため50〜100℃で反応
させる必要がある。 If the temperature of MMA waste acid is 100℃ or higher, the reaction will be too violent, so the reaction will not be uniform, and the foaming will be severe.If the temperature of MMA waste acid is 50℃ or lower, the solidification reaction will progress too slowly, which is disadvantageous. It is necessary to react with
（作用）
MMA廃酸は硫酸水素アンモニウム及び硫酸を
主成分としているが硫酸苦土アンモニア肥料を製
造するために硫安と水酸化マグネシウムを廃酸に
混合する。しかしこの場合、廃酸に反応の全量の
硫安を加えて溶解し、そこに水酸化マグネシウム
を加えると反応の進行が遅れ、なかなか固化せ
ず、また廃酸に水酸化マグネシウムを加えると反
応が急激すぎてたちまち固化し、捏和機への輸送
が困難になり、そこへ硫安を加えても硫酸苦土ア
ンモニアの反応が進行し難い。そこでMMA廃酸
に添加硫安の一部と水酸化マグネシウムの全量を
加えることにより反応は穏やかになり、スラリー
は安定する。そのため捏和機への流動移送が円滑
になり、残量の硫安を加えて捏和してもスラリー
と硫安の混合が充分に行なわれ、硫酸苦土アンモ
ニアの反応が充分に進行する。更に本法によれば
15〜20分捏和するだけでドライヤーを使用しなく
とも粉末固体の硫酸苦土アンモニア肥料とするこ
とができるものである。(Function) MMA waste acid has ammonium hydrogen sulfate and sulfuric acid as its main components, but ammonium sulfate and magnesium hydroxide are mixed with the waste acid to produce ammonia sulfate fertilizer. However, in this case, if the entire amount of ammonium sulfate for the reaction is added to the waste acid and dissolved, and then magnesium hydroxide is added thereto, the progress of the reaction will be delayed and it will not solidify easily, and if magnesium hydroxide is added to the waste acid, the reaction will be rapid. The mixture quickly solidifies, making it difficult to transport it to the kneading machine, and even if ammonium sulfate is added thereto, the reaction of the ammonia magnesium sulfate is difficult to proceed. Therefore, by adding part of the added ammonium sulfate and the entire amount of magnesium hydroxide to the MMA waste acid, the reaction becomes mild and the slurry becomes stable. Therefore, fluid transfer to the kneading machine becomes smooth, and even if the remaining amount of ammonium sulfate is added and kneaded, the slurry and ammonium sulfate are sufficiently mixed, and the reaction of the ammonia magnesium sulfate proceeds sufficiently. Furthermore, according to the Act
By kneading for 15 to 20 minutes, it is possible to make a solid powdered magnesium sulfate ammonia fertilizer without using a dryer.
また上記の外に、MMA廃酸に硫安の一部を加
えてから全量の水酸化マグネシウムを加える基本
的な本発明の方法に代えて最初にMMA廃酸に全
添加量の一部の硫安と水酸化マグネシウムを同時
に加えるようにしても反応は穏やかで、本発明の
目的を達することができる。 In addition to the above, instead of the basic method of the present invention in which a portion of ammonium sulfate is added to MMA waste acid and then the entire amount of magnesium hydroxide is added, a portion of the total amount of ammonium sulfate is added to MMA waste acid first. Even if magnesium hydroxide is added at the same time, the reaction is mild and the object of the present invention can be achieved.
なお第１図は本発明における製造工程の説明図
で１は混合反応器、２は捏和機でａはMMA廃
酸、ｂは硫安、ｃは水酸化マグネシウム、ｄはス
ラリー、ｅは製品（パウダー状）である。 Figure 1 is an explanatory diagram of the manufacturing process in the present invention, where 1 is a mixing reactor, 2 is a kneading machine, a is MMA waste acid, b is ammonium sulfate, c is magnesium hydroxide, d is slurry, and e is the product ( powder form).
（比較例１）
外気温度13℃、95℃のMMA廃酸3800ｇに硫安
1028ｇを加えて溶解し、これに水酸化マグネシウ
ム965ｇを加えて混合し、得たスラリーを捏和機
中で捏和した。捏和60分後、固化はしがた粘着性
のある湿つた感じの粉末であつた。これを放置し
ておいたところ翌日固結して硬化しており簡単に
はくずせなかつた。(Comparative Example 1) Add ammonium sulfate to 3800g of MMA waste acid at outside temperature of 13℃ and 95℃.
1028 g of the slurry was added and dissolved, and 965 g of magnesium hydroxide was added thereto and mixed, and the resulting slurry was kneaded in a kneader. After 60 minutes of kneading, it solidified into a sticky, wet powder. When this was left as it was, the next day it solidified and hardened and could not be easily broken down.
（比較例２）
外気温度５℃で88℃のMMA廃酸3800ｇに水酸
化マグネシウム965ｇを加えて反応させたところ
激しく発泡し、発泡が収まると同時に固化が始ま
り、生成スラリーの捏和機への輸送は流動性がな
いために困難で、また捏和機での硫安1028ｇとの
混合も充分行われなかつた。(Comparative Example 2) When 965 g of magnesium hydroxide was added to 3800 g of MMA waste acid at 88°C at an outside temperature of 5°C and reacted, it foamed violently, and as soon as the foaming stopped, solidification started, and the resulting slurry was transferred to the kneading machine. Transportation was difficult due to the lack of fluidity, and mixing with 1028 g of ammonium sulfate in a kneading machine was not carried out sufficiently.
（実施例１）
外気温度15℃で95℃のMMA廃酸3800ｇに硫安
308ｇ（全量の30％）を混合溶解し、これに水酸
化マグネシウム965ｇを加えて反応させた。発泡
は比較例２よりも遥かに少なく、生成したスラリ
ーは消泡後５分以上流動性を保つていたため捏和
機への輸送は平滑に行われ、また捏和機への硫安
の残量720ｇとの混合も充分に行われ捏和機で20
分捏和後はパウダー状に固化した。このパウダー
は翌日若干固結していたが手で簡単にほぐすこと
ができた。(Example 1) Add ammonium sulfate to 3800 g of MMA waste acid at 95°C at an outside temperature of 15°C.
308g (30% of the total amount) was mixed and dissolved, and 965g of magnesium hydroxide was added thereto for reaction. Foaming was much less than in Comparative Example 2, and the slurry produced remained fluid for more than 5 minutes after defoaming, so transportation to the kneading machine was smooth, and the remaining amount of ammonium sulfate to the kneading machine was 720 g. The mixture was sufficiently mixed with the kneading machine.
After the separation and kneading, the mixture was solidified into powder. This powder was slightly hardened the next day, but I was able to easily loosen it by hand.
この製品はアンモニア態チツソ8.8％、水溶性
MgO12.3％を含み、MgO分の99％以上が水溶化
していた。また製品中の硫酸苦土アンモニア
（（NH4）2Mg（SO4）2・6H2Ｏ）はＸ線回折で定量
したところ71％含まれ、残りは（NH4）2Mg
（SO4）2・０〜4H2Ｏが大部分と推定された。 This product contains 8.8% ammonia, water soluble
It contained 12.3% MgO, and more than 99% of the MgO content was soluble in water. In addition, 71% of the sulfuric acid ammonia ((NH 4 ) 2 Mg (SO 4 ) 2.6H 2 O) in the product was determined by X-ray diffraction, and the remainder was (NH 4 ) 2 Mg.
( SO 4 ) 2.0-4H 2 O was estimated to be the majority.
（実施例２）
外気温度４℃で60℃のMMA廃酸3800ｇに硫安
103ｇ（全体の10％）と水酸化マグネシウム965ｇ
を同時に加え、反応させた。発泡は比較例２の場
合より遥かに少なく、生成したスラリーは消泡後
５分以上流動性を保つていた。そのため捏和機へ
の輸送や捏和機中での残りの硫安925ｇとの混合
も問題なく行われ、15分捏和後、スラリーはパウ
ダー状に固化した。このパウダーは翌日若干固結
していたが簡単にほぐすことができた。この製品
はアンモニア態チツソ8.8％、水溶性MgO12.5％
を含み、MgO分の99％が水溶化していた。また
製品中の（NH4）2Mg（SO4）2・6H2Ｏは70％含ま
れていた。残りは（NH4）2Mg（SO4）2・０〜4H2
Ｏが大部分と推定された。(Example 2) Add ammonium sulfate to 3800 g of MMA waste acid at 60°C at an outside temperature of 4°C.
103g (10% of the total) and 965g of magnesium hydroxide
were added at the same time and allowed to react. Foaming was much less than in Comparative Example 2, and the resulting slurry remained fluid for 5 minutes or more after defoaming. Therefore, the slurry was transported to the kneading machine and mixed with the remaining 925 g of ammonium sulfate in the kneading machine without any problems, and after kneading for 15 minutes, the slurry solidified into powder. This powder was slightly caked the next day, but was easily loosened. This product contains 8.8% ammonia and 12.5% water-soluble MgO.
99% of the MgO content was soluble in water. Furthermore, the product contained 70% (NH 4 ) 2 Mg (SO 4 ) 2.6H 2 O. The rest is (NH 4 ) 2 Mg (SO 4 ) 2・0~4H 2
The majority was estimated to be O.
（効果）
本発明は上記のようにメタクリル酸メチルの製
造時の廃酸の利用法としてMMA廃酸と硫安およ
び水酸化マグネシウムを反応させて硫酸苦土アン
モニア肥料を製造するもので、この際硫安を初め
にその一部を加え水酸化マグネシウムをこれと同
時または、その後で添加し穏やかに反応させて安
定なスラリー状となし捏和機へ円滑に流動輸送し
て残量の硫安を加えて捏和することにより反応を
充分に進行させドライヤーを使用することなく15
〜20分の捏和により粉末状の硫酸苦土アンモニア
肥料を得ることができるものでアンモニア態チツ
ソ７％以上を含むとともに、水溶性マグネシウム
を10％以上含んでいるため畑作やハウス園芸肥料
として利用できるものであり、チツソ７％以上含
有している点は肥料の面でも一層有利である。ま
たこの肥料は配合肥料の原料としてももちろん有
効に利用できるものである。本発明方法はこの硫
酸苦土アンモニア肥料の極めて経済的な製造方法
であり、これにより工場のMMA廃酸が有利に利
用できる。(Effects) As described above, the present invention is a method of using waste acid during the production of methyl methacrylate, in which MMA waste acid is reacted with ammonium sulfate and magnesium hydroxide to produce ammonia sulfate fertilizer. First, add a part of it, add magnesium hydroxide at the same time or after that, react gently to form a stable slurry, transport smoothly to a kneading machine, add the remaining amount of ammonium sulfate, and knead. 15 to allow the reaction to proceed sufficiently without using a dryer.
Powdered magnesium sulfate ammonia fertilizer can be obtained by kneading for ~20 minutes.It contains over 7% of ammonia and over 10% of water-soluble magnesium, so it can be used as fertilizer for field crops and greenhouse gardening. The fact that it contains 7% or more of Chituso is even more advantageous in terms of fertilizer. Moreover, this fertilizer can of course be effectively used as a raw material for compound fertilizers. The method of the present invention is an extremely economical method for producing this magnesium sulfate ammonia fertilizer, which allows MMA waste acid from factories to be used advantageously.
第１図は本発明の硫酸苦土アンモニア肥料の製
造方法の工程説明図である。
１……混和反応器、２……捏和機、ａ……
MMA廃酸、ｂ……硫安、ｃ……水酸化マグネシ
ウム、ｄ……スラリー、ｅ……製品（パウダー
状）。
FIG. 1 is a process explanatory diagram of the method for producing ammonia sulfate fertilizer of the present invention. 1...Mixing reactor, 2...Kneading machine, a...
MMA waste acid, b...ammonium sulfate, c...magnesium hydroxide, d...slurry, e...product (powder).
Claims (1)
で排出される硫酸水素アンモニウムおよび硫酸を
主成分とする廃酸を50°〜100℃に保ちつつ、全反
応量の５〜50重量％相当の硫安と水酸化マグネシ
ウムの全反応量を混和し、捏和機に流し込むと同
時に残りの硫安を加え一定時間捏和することによ
り粉末状の硫酸苦土アンモニア肥料を製造する方
法。1 While keeping ammonium hydrogen sulfate and waste acid mainly composed of sulfuric acid discharged in the esterification process during the production of methyl methacrylate at 50° to 100°C, add ammonium sulfate and water equivalent to 5 to 50% by weight of the total reaction amount. A method of manufacturing powdered magnesium sulfate ammonia fertilizer by mixing the entire reaction amount of magnesium oxide, pouring it into a kneading machine, adding the remaining ammonium sulfate, and kneading for a certain period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5184585A JPS61215282A (en) | 1985-03-15 | 1985-03-15 | Manufacture of ammonia magnesium sulfate fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5184585A JPS61215282A (en) | 1985-03-15 | 1985-03-15 | Manufacture of ammonia magnesium sulfate fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61215282A JPS61215282A (en) | 1986-09-25 |
| JPH0460956B2 true JPH0460956B2 (en) | 1992-09-29 |
Family
ID=12898187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5184585A Granted JPS61215282A (en) | 1985-03-15 | 1985-03-15 | Manufacture of ammonia magnesium sulfate fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61215282A (en) |
-
1985
- 1985-03-15 JP JP5184585A patent/JPS61215282A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61215282A (en) | 1986-09-25 |
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