SU998335A1 - Process for producing ammonium-potassium tripolyphosphate - Google Patents

Description

  .. 1 The invention relates to the preparation of double ammonium ammonium potassium polyphosphate, c) 0 m of formula (M Nd) O x H2H, which can be used as a highly concentrated fertilizer, an additive to balance nutrients and an additive. to synthetic mokshshm means. . . A known method for producing ammonium tripolyphosphates is a potassium of the general formula (NH4) HgO. where K / y O, 61, 85, Z 1-2, by mixing Tripoli ammonium phosphate and potassium at ~ 25 ° C, followed by precipitating the product with a low 1 × 11 cm water-soluble organic solvent. The project, which has a variable composition, is left behind as an oily mass. To obtain a crystalline product used as an udofenia, the oil is separated from the mother liquor, treated with a precipitant to form a crystal-allic schytuduk, separated and dried. The disadvantage of this argument is that its complexity is due to its Multiplex: tadvy. There is a well-known method for producing ammonium-chalcium tshchushphosphate of general formula (МН4) (by treating potassium dihydrot-1Hpo-1fthftah potassium monohydrate (ammonia gas, salt 1–2% and 5–70% dry air for 40–48 h, 152СРС with subsequent drying 18–22 ° C and relative (gel moisture of 2PO3%. The resulting crystalline npoayVf contains 94-V8% of phosphorus in the form | 1) The disadvantages are known (the method is not high enough phosphorus content in tripolyform, as well as a long duration and multioperational process. The purpose of the invention 51вл a povyshevke tripoliformy content in the product, reducing the time and simplify the process by eliminating operations to HIPS.

 This goal is achieved by the fact that according to the method of producing ammonium tripolyphosphate-potassium of the general formula (Id) K. 2Hx2p, comprising treating the Kali trihydrotripolyphosphate dihydrate with gaseous ammonia containing P, 1-O, 2% water, and the treatment time is 16-24 hours

with is-as c.

These differences make it possible to precipitate ammonium tripolyphosphate –cali of the general formula {Nli4.J ,, K, j, 2H, jO in crystalline and dry form with a phosphorus content in tripolyform of 971OO%, to exclude the opera tion of the product, and also reduce the duration of the process to 16-24 hours

In the process of interaction of ammonia with solid potassium dihydrate with potassium trihydrotripolyphosphate, water vapor is a coagulator. When the water content in ammonia is less than 0.1%, the interaction speed is not sufficient for the view and the process is long. With water content

in ammonia more than 0.2%, the resulting product must be dried.

The effect of the treatment time with ammonia. Potassium trihydrotryl phosphate dihydrate on the composition of the product is presented in the table.

The data in the table shows that a sufficient amount of ammonia is absorbed in 16 hours already, but the crystalline lattice of the product has not yet been formed. A treatment time of ammonia of 2.4 hours is sufficient to obtain the product in crystalline form.

The obtained compound was analyzed by thin layer chromatography, chemical analysis (table) and IR spectrosxdain. The infrared spectra contain bands embedded in the phosphate lattice of the ammonium group (140O and 1450 cm)

Example. For the preparation of ammonium tripolyphosphate, a pitch of 0.35 g. HjiijjP O c is contained in an atmosphere of ammonia containing 0.2% of water at atmospheric pressure at. According to test data, the resulting product is K NH4), containing 1OO% phosphorus in the form of tripolyphosphate (pure chromatographic). The product yield of 0.39 g (1OO%).

EXAMPLE 2 To obtain ammonium tripolyphophate, alkali -cal, 0.67 g KgJHL ,, P ,, Q, o 2Hgp is kept in ammonia gas, containing 0.1% I water, 24 hours at atmospheric pressure and 15 ° WITH. According to test data, the resulting product is LH4.) SP-, 2H, containing 97% phosphorus in the form of tripolyphosphate. Product code is 0.76 g (100%).

The proposed method allows to obtain a highly efficient concentrated complex fertilizer in a simpler way.

The agrochemical tests of ammonium tripolyphosphate - ali, carried out in sod-podzol-vegetative growing experiments on soil with plants of long-flax, showed its advantage over orthophosphates and mixed fertilizers based on superphosphate, potassium chloride and ammonium nitrate, containing an equivalent amount of pitcher, containing potassium chloride and ammonium nitrate, containing an equivalent amount of pitcher and ammonium nitrate, containing an equivalent amount of a superphosphate, potassium chloride, and ammonium nitrate, containing an equivalent amount of pitcher, containing an equivalent amount of pitcher, ammonium nitrate, potassium, and ammonium nitrate, containing an equivalent amount of pitcher, containing potassium chloride and ammonium nitrate, containing an equivalent amount of pitcher and ammonium nitrate, containing an equivalent amount of pitcher, ammonium chloride, potassium and ammonium nitrate, containing an equivalent amount of pitcher, containing potassium chloride and ammonium nitrate, containing an equivalent amount of pitcher and ammonium nitrate. The yield of fiber and seed using ammonium tripolyphosphate and potassium was 14.9 and 7.21 g / vessel, respectively, using 13.65 and 7.17 g / vessel orthophosphate, using mixed fertilizers 13.17 and 6.68 g /vessel.

F.Ormupa invention

. 1. A method of producing ammonium tripopyphosphate-potassium carbonate (lOH) K Rlo, d. 2H, including treating potassium tripolyphosphate with ammonia containing water, characterized in that, in order to increase the tripolyform content in the product, shorten the time and simplify the process by eliminating the substance operation product, as tripolyphosphate potassium use trigndrotripipifosfata ka dihydrate.

LIA, and ammonia is served with content of 0.1-0.2% of water.

2. The method according to claim 1, of which is carried out with the fact that the process is carried out for 30-24 hours at 15-25Pc.

;Information sources,

Considered in the examination

1. USSR author's certificate

35 No. 636183, cl. From 01 to 25/45, 1977.

2. Certificate of CCCt for application No. 2919033 / 23-26,

cl. C O1 B 25/45, 1980.

Claims (2)

Claim 1. A method of producing ammonium potassium tripolyphosphate of the general formula 2H £>, comprising treating potassium tripolyphosphate with ammonia containing water, characterized in that, in order to increase the content of tripolyform in the product, reduce time and simplify the process by eliminating the drying operation of the product, as potassium tripolyphosphate use trihydrotripolyphosphate dihydrate. lia, and ammonia is served with a content of 0.1-0.2% of water. 2. The method according to π. 1, which differs from me in that the process is conducted for 30–16 hours at 15–25 ° C.