JPS60122787A - Manufacture of water-soluble phosphatic fertilizer - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Really? : Light-soluble phosphorus, <soluble magnesium and soluble J+
4th edition'@ = Melted phosphorus fertilizer containing slow-growing components! ! lI
This invention relates to a method for producing a water-bathable phosphate fertilizer which is decomposed in two liquids and contains 90% or more of phosphoric acid and magnesia, which is water-bathable.

Molten phosphorus fertilizer is an amorphous glass-like fertilizer whose main ingredients are phosphoric acid, lime, magnesia, and monosilicon.It is a fertilizer with excellent properties as a soil conditioner, but depending on the target of application, it may sometimes Water-bathable phosphoric acid as well as water-soluble ingredients may be required. The author of the present invention understands that molten phosphorus is 1.77 lvY for 2 citric acid, and because it has the property of being easily immersed in relatively dilute acids, molten phosphorus #' The present invention was completed based on the knowledge that when decomposed in a liquid, fertilizer containing water a, phosphoric acid, and other water-bathable components can be easily obtained.

The present invention will be further explained in detail below.

The present invention is a phosphorus compound fertilizer with a water bathing component of at least 90J (Pas5) and phosphorus (MgO) in the melted phosphorus fertilizer by reacting the molten phosphorus fertilizer with a phosphoric acid solution. This is the manufacturing method.

The molten phosphorus fertilizer has each of the 7 components and has 3 functions, but an example of the molten phosphorus fertilizer is shown in the first article. The phosphor used for disassembly is of each atm degree used industrially or can be used at 20% of H3PO4.
~75% of tb < rsxO (well, all 1 Fumi 10
It is preferable to use 30% to 65%, and among these, 60% to 40% Rinbori's resin is used because the reaction is faster. In addition, 65% or more of the reno's yl.
If the liquid is added for 1 month, the reaction will partially progress and MI
+lil! Therefore, it is necessary to stir and mix uniformly and quickly.

Phosphorus used in the decomposition reaction (rq = liquid anchor) If 65 or more phosphorus is used, it will be obtained as a reaction product or a solid, and if it is crushed into a powder of 2 to 2 or less, it will be obtained. Ma\
Can be used as fertilizer.

When the solution dissolves, a product with a concentration of 50% or less forms a liquid or paste, so it can be neutralized or mixed depending on the application. You can use it as fertilizer, or you can get granular fertilizer by adding one of each type of Kutsumachi Hisashi to it and pouring it all over.

Next, the division of the phosphoric acid solution and the molten phosphorus fertilizer into the R-mounting table will be explained.

Because molten phosphorous fertilizer is amorphous and vitreous, there are no crystalline components and a clear structural formula cannot be given.
Cab other than O4)2, MgO, Fe2O3 and AJ
Assuming that 203 reacts with phosphorous ft1 liquid (H3PO3) according to the following reaction formula to form phosphoric acid-lime and phosphoric acid-magnetic earth to obtain water-soluble phosphoric acid and water-bathable magnesium earth, the first
In the case of 25% and 20 t molten phosphorus shown in the table, 100 t H3PO4 is 1530 io'oojl, respectively. P and 1607I! It is necessary.

Ca5(PO4)s + 4H3PO4+H20= 3
CaH4(PO4)2・H20−...(11CaO+
2H3PO4+ H20= CaH4(PO4)2-H
20"' (2jMgO+2H3PO4+2H20=Mg
H4(Pop)2・shi20...(3)F'e203
+ 2H3PO4, = 2FePO4+3H20"'f
4) A'203 + 2H3PO4=2AIPO4+
3H20...(5) Use of phosphoric acid for molten phosphorous fertilizer When oil is insufficient, soluble dicalcium phosphate (magnesium phosphate) is formed, and phosphoric acid magnesium (magnesium) of fused phosphorus fertilizer is produced. The residual water bathing phosphorus will be reduced.

Also, the smoked phosphorus fertilizer is rare 113. Since bathing is easy, when a phosphoric acid solution is added to and mixed with molten phosphoric acid, it dissolves in the bath in a few minutes, and the reaction is completed in an extremely short time. This means that equipment such as reaction tanks can be used to process raw materials in a variety of ways, making it safer and easier to use.
21 at a reasonable cost! ν quick or uJ Noh.

The details will be explained below with reference to examples.

Example-1 100% 100% 1oooy of 25% fused phosphorus fertilizer shown in Table 1
(3PO, the phosphoric acid solution for each Kamii was adjusted in advance to be 1530.p, and a predetermined amount of the phosphoric acid solution was added to the molten phosphorus fertilizer, mixed well, and reacted.

The reaction is Rin r1! '-: Fluid occurred on the back of the face and caused a fever. Zu? The fever reached its peak within a few minutes and then gradually decreased.

The reaction was completely completed within 10 minutes.

Add the components of the reactant and add the lees to the second bowl.

Even if you use a phosphoric acid solution with an incredible strength for 1 month, W-P2O
5/T-P2O5 is 95% or more, melt+jl','
It can be seen that the phosphorus fertilizer was sufficiently distributed.

The product obtained by adding 65% phosphorus to 25% exploded phosphorous manure by adding r+iΣ to
The components of the product, which was dried for 1 hour using riP and then sieved using 1j, are shown in Table 3. This is W-P20s = 4
Contains 5% or more, W-P2O5/T-p2o5=9
The W-Mg content was 24% or more for 5 inches or more.

Example-2 100 g of 20% fused phosphorus fertilizer shown in the first group
Phosphoric acid solution of each a concentration was adjusted in advance so that 3P0.16071 was obtained, and a specified amount of phosphoric acid solution was added to the molten phosphorus fertilizer, and the mixture was thoroughly mixed and reacted.

The reaction occurred immediately after the addition of phosphorus r'11' and generated heat, and the Asahi exotherm reached its peak, and then gradually decreased. The reaction was more intense and the exothermic peak temperature tended to be higher depending on the concentration of the phosphorus solution.

The results of determining the components of the reactant as 6I are not shown in Table 4.

(Even when phosphoric acid solution was used, more than 95% of the reaction product w-p2o, /'r-p2o, , = 95% or more was obtained, and the molten phosphorus fertilizer was sufficiently reacted and decomposed. The reaction product using 0.60% H3PO41'& was crushed and dried at 100-105°C for 1 hour.The chemical composition of the product passed through a 21-mesh sieve is shown in Figure 5. This contains w-P205=49%, W P2O5/
T-P2O5 = 95% or more and W-MgO = 5.5%
Therefore, it was possible to easily remove water-soluble phosphorus fertilizers containing water bathing phosphorus and water bathing magnesia.

Claims (1)

[Claims] In a method for producing a water-soluble phosphate fertilizer by reacting molten phosphorus fertilizer with a phosphoric acid solution, the molten phosphorus fertilizer contains Ca3(Pot)g per 1 mole determined from chemical analysis values. is 4 mol, KN other than Ca3(PO4)+1 is released from Cab. A method for producing a water-soluble phosphoric acid fertilizer, which involves adding a K phosphoric acid solution so that each mol of Mg(L Fe2O3 and Al2O2 has a ratio of 2 mols of H, PO).