JPS6065716A - Treatment of bittern by ionic salt preparation wherein device preparing potassium sulfate from mixed potassium salt containing magnesium chloride is combined with multiple effect evaporator and operated - Google Patents

Abstract

PURPOSE:To convert potassium chloride into potassium sulfate more effective as a fertilizer and to utilize it more efficiently, by combining a production apparatus for potassium sulfate from a potassium salt containing magnesium chloride with a multiple effect evaporator, operating them. CONSTITUTION:A magnesium sulfate solution and a potassium salt containing magnesium chloride formed separately are added to the first reaction tank 5 of potassium sulfate, and reacted to give the bittern of potassium sulfate 9. The separated solution is stored in the mother liquor tank 10. The intermediate product 9 of first potassium sulfate and the regenerated potassium chloride obtained by the device 1 for regenerating potassium chloride are added to the reaction tank 5' of secondary potassium sulfate, water is further added to it, and they are stirred, potassium sulfate is formed, and sent to the centrifugal separator 6 to give the product 11 of potassium sulfate. The separated mother liquor having prepared the gypsum product 14 is stored in the tank 15 for bittern from which calcium is removed, the bittern freed from calcium is sent to the triple effect vacuum evaporator 18 in parallel by the pump 16, evaporated under reduced pressure, a mixed solution containing potassium is collected, and dehydrated by the centrifugal separator 21, to give a product.

Description

DETAILED DESCRIPTION OF THE INVENTION The composition of bittern produced by the ionic salt production method is significantly different from that of the conventional bittern produced by the ion salt production method.

Magnesium nitrate, Mg80. In its place, a considerable amount of 7-calcium salt, 0aOL2, is contained. Br, chloride, KO, and L have been increasing rapidly. It contains about 3.3 times as much salt as conventional bittern, and about twice as much salt as bittern.

The chemical composition of ionic salt production bittern is roughly as follows: 0 Mg0I, 2It, ! r%, KQX, 11. ．． 2%
, Na0L2, 1%, 0aOL25%, Mg
Br20.9%.

From this raw material bittern, the active ingredients are forcefully, rationally, and economically extracted, and the two ingredients are extracted from the outside world. Mg5O, + 0aOIa using the MgSO4 component found in
2=MgOL2+0a304 is converted into stone pot Oa 804AH,0 by a chemical reaction. The so-called decaling process is a chemical method that is always selected and adopted.

An evaporation step is added to this decalcified bittern to concentrate and collect a mixed salt of sodium chloride and potassium salts.

The liquid from which potassium salts are collected is called thick bittern. It is the main component of liquid magnesium. This main component Mg
0L is the raw material base for manufacturing various important magnesia products. The above is the principle of the general process of the shield.

1. When concentrating decalcified bittern and collecting potassium salt, first:
The first thing to be collected is a chlorinated mixed salt containing Na0I+. Next, as the concentration of bittern increases, a double salt called carnallite called Mg0L and KOL6H20 is collected. The mother liquor of this double salt is the thick bittern called liquid magnesilla fu.

Among these two types of potassium salt, the chemical composition of the pressurized mixed salt containing Na0L is approximately 0a804/, j%, Mg0I+
27, 0%, KOL'lu, 0%, Na0L 4'
%.

It is used sparingly and has a wide sales channel exclusively in the leather manufacturing industry. Therefore, there is no particular problem. However, the uses of carnallite, which is a secondary precipitated potassium salt, are limited. Conventionally, this salt was subjected to hydration of about 0% by weight, resulting in a hydrolysis reaction Mg0L2KOL6H20+ '7.8H20-→0
．． 84KOL + Mg0L20.16KOL+ 13
．． 8H20f) General, crude potassium chloride KOL#J41r
% of raw carnallite 71, approximately 230 kg
The yield of KOI+ is about 70%, but this process is not economically advantageous. Today, KOL production is hardly neglected. However, for the recovery of RMg0L2, its significance is not lost. The present invention is an improvement to the above process. Potassium chloride is used as fertilizer and converted to more effective sulfate and acid potassium, 2SO4, in order to promote further development. 2K
OIL + Mg5O4 = K2Bo4 + Mg0L2O According to the chemical reaction, sulfuric acid pressurization is made using W. On the other hand, the composition of the mother liquor that is obtained by mixing the secondary mother liquor with the sodium chloride acid, -subsulfuric acid potassium mother liquor from which the polished potassium was collected and the secondary mother liquor is obtained at 4°C is about Mg0L2. , 1%Mg5O,3,Q
-%, Na0LJ 17%, MOL 1.3%.

This potassium minutate separation mother liquor plays an important role in Kitazuno. This is the reaction that converts Haranachi Fl19 odor bittern into Oa OL2 removal Ishii, 0aOL,, +Mg5O, = (
! aso4+Mg0L2 is suitable for the decaling reaction and serves as a source of oxidizing agent for the calcification reaction. In addition to the conventional liquid MgSO4 used in this reaction, it also contains active ingredients KOL, MgSO4, Mg0L2, and N&OL.

In addition to Mg5O, which participates in the above-mentioned gypsum production and decaling reaction, it also contains Mg0L2, and Mg generated during Oa SO4 production.
Not only does it combine with 0L2 to ensure an increase in the Mg0L20 concentration in the decalcifying bittern, but it also has the advantage of being accompanied by the active ingredients of Na0L and KOL. Conventional simple VL, the concentration of bittern theory cal reaction when only hemp is used, Mg5O, concentration company approx./7. ! ;%, 2709/A, compared to this mother liquor, Mg804! , 'i%, tlr, t9/J).

Therefore, in the conventional method, Oa (lLg A 0.9
For g/71/ ixl, the required Usufu liquid is 1,
0.9Kgg80 ×−−,λ70==(J−J/KJ!/
Requires gX7e/i14 = 1.0ttKL.

Mg8O Considering this based on the produced membrane cal bittern, compared to the use of simple sulfuric hemp liquid, a decalcified bittern of HA3ixA per original deodorized bittern/KA is obtained, whereas a decalcified bittern of 2.041 HA is produced. becomes.

In this way, the amount of decalcified bittern increases by approximately half the amount of bittern.

The conventional decalcifying bittern component is Mg0L2112. ! ;9/
Including xol+ J4.99/LNaOI+ 23.39p
Be J4(,j(/j'o), the composition of the decalcified bittern of the present invention is ugOI+2/13,09
/Z, 1IaoI+ J7.69/A *KOL
77-79, etc., n630.2 (1!00). The specific gravity of the solution increases, and the total number of salts increases significantly. Therefore, it is possible to reduce the consumption of solvent in the evaporator by about 20%. A detailed description of the method for producing sulfurized butyric pieces in the order of steps as shown in the separate drawings is as follows. The operation is batchwise. A sulfur-marinated Be211, Mg5o, /7.3% product separately produced in the starved potassium cypress called S, and a homemade potassium salt containing magnesium chloride, the chemical composition of which is Mg0L222.3%, KOLt.
20 displayed in to, s%, s, s%, Na0I+ 5
．． 1%, approximately uooo kg was added, and the reaction was carried out for S hours. Using a mixer, perform centrifugal dehydration at 6 centrifugal fractions 1 and 1A, and remove 9 (iii) acid. It is an intermediate product.The yield of this product is about 3000 ni.

The bond chemistry is approximately 2So, 31-1%, Mg8
0.23. lI%KOL? ,! ;%, 1iaOL
O, 4%, 20 display 22. The yield of IG4'20 is approximately 7%. The amount of mother liquor is approximately tKAteal. Ratio fiB= 3 /''(/!; oO) Mother 11cD group 1f
,KoLA,/%,NaffL,2.9LMg0I,
21113%, Mg80, 3.32%. 5' is a secondary marrow acid potassium reaction tank. It has the same structure as the capacity container S, and it is a container with q, 5yxL, itttK.
It has wings. The number of rotations is 2S times/minute. To this secondary potassium sulfuric acid reaction hinoki, about 9 primary potassium silicic acid intermediate products
Approximately 2 tons of recycled potassium chloride obtained from the regenerated potassium sulfurization device are added to a freshwater tank of 7K.
Add L for t time to produce potassium sulfate, mix with lr mixer and t for N machine to obtain ll product sulfuric acid. The composition of recycled potassium chloride is
Approximately rr, o%, 1iaoI + 6%, 0a
The content of SO4 is less than 1%. The composition of the product with sulfuric acid added is approximately KOL 5.9%, 0a802.0%j
1g80/, 2% 4280° No. 4 rt, o%, O display is 30.1%. 1 serving, yield, 2. , 2 minutes - heat the mother liquor to about 7 minutes B5.2j' (/
j'0). Mother liquor (・Composition is KOI+/J, 4 [
%, MaOL 1. J%1Mg0I+21.5%, Mg
5O4j, 5%. This potassium arsenate separated mother residue is mixed with the above-mentioned -next f#:#additional mother liquor and stored in a mother liquor tank 10, and sent to the Ishii production reaction tank 13 of the main step of bittern processing, / Second, deodorized bittern plays an important role in producing gypsum and producing decalcifying aromatic juice as a decalcifying raw material.
It is to perform. That is, 11 gypsum products are manufactured. The separated mother liquor is stored in the decalcified bittern 15. The composition of this decalcified bittern is MgO rice/IJ9h JOL 77.7
/, 4. Na0L 37.6φ, B530.2 (100
) As mentioned above. The decalcified bittern stored in the IS is
The liquid was supplied in parallel to a triple-effect vacuum evaporator by a pump named 1, and the steam from a vapor reservoir named 17 was evaporated and concentrated under reduced pressure as sm, and a pressurized mixed salt was collected. ,
It is dehydrated and made into a product in a centrifugal separator 21. The separated mother liquor is collected and stored in a thick bittern cypress 23.

The process below the pump of lt is generally a gauze rotation.

Per day, the treatment M of the original ion bittern is about 73-days. This is a product made from Tetsutori clay, E<+
mkari3. /l, quality 'g2o so%, pressurized mixed salt 1t
tK, 02t, 0%, ah bittern good, about 3j, jKi,
B6J J -j (/j”0) 9M E OL
g J 1%. The conventional method simply involves adding magnesium sulfate to Mg
The products and production volume per day using the same treatment method and the same deodorized bittern using 5O, solution are as follows. With the conventional method, it is not possible to obtain mackerel, and the yield of 2021r%/2tS bittern is obtained.3.2. It is sKA.

In the method of the present invention, the amount of sulfuric acid and water hemp used as auxiliary raw materials is increased by about 20% compared to the conventional method.

In addition, new use of pressurized crude chloride consumes approximately 4 tons per day.◇The amount of sulfuric acid used is directly converted into sulfuric acid from potassium sulfate, and the amount of water hemp used is the amount used for new use. It combines with potassium chloride and is converted into MgOLg products. In addition, all unreacted compound ores are turned into products as potassium mixed salt. It is clear that the method of the present invention is far superior to the conventional production method in terms of product productivity and quality.
The concentration process is carried out using a device that produces potassium sulfate and an evaporator.
As mentioned above, the method of combining and linking operations has been described, and compared to the conventional method, the method of the present invention greatly contributes to improving the factory's ability to digest raw bittern, saving energy, improving the sophistication of products, and improving productivity. It is something to do.

Just f4 from bittern. Currently, the production of a-potassium itself has not been implemented or industrialized by other companies, but we are working to further advance the implementation of the production method and improve energy savings and productivity by closely linking it with multi-effect evaporators. While trying to improve,
Characteristics of the present invention, originality. In particular, we are paying close attention to the old use of mochi acid potassium fillet liquid, and are focusing on the selection of raw material potassium salt, Mg0L.
It emphasizes the use of pressurized mixed salts containing 2. It should be noted that this method is currently in use at the applicant's factory.

[Brief explanation of drawings]

1 is for potassium chloride. 2 is for freshwater tank. 3 is for sulfurized hemp liquid. 5 is for homemade potassium salt. 5 is for primary sulfuric acid. The mixer is the sulfuric acid processing intermediate product 10 is the potassium sulfate mother liquor tank 12 is the sulfuric acid potassium product 12 is the deodorizing bittern tank 13 is the gypsum reaction tank 1 is the gypsum product Can 19 Condenser 20 Vacuum pump 21 Centrifugal separator 2 Cali, Carnalite, Mixed tomb 23 Healthy concentrated bittern tank Special RF user Salt 1) Male - Procedural Shinshosho 2v ~ Gnesium ζ'M'ffl'Th b
% 'fi;
Relationship between t and 1 and the incident Patent applicant residence Wl 17. , 1-ft 4 1-ft 4 1-ft 4 1 whisper bad agent None Date of S amendment order 1984 181184 Brief explanation of the drawings

Claims (1)

[Claims] A bittern treatment method comprising a device for producing acid potassium from potassium lachrymal fluid containing magnesium chloride in combination with a multi-effect evaporation IRJ device.