HUT52019A - Fertilizer suspension containing biologically active stabilizator and process for producing them - Google Patents

Abstract

A biologically active fertilizer suspn. contg. a stabilising agent comprises:all pts.wt.). 20-65 active matter, 1-30 stabilizer contg. 2-40 wt.% refined clay mineral contg. montmorichlorite, 0.05-2 wt.% alkali-metal salt, and water to 0-5 wt%. 0-20 alkaline additive pref ground dolomite calcium carbonate N caustic sludge. 0-5 thickener pref carboxy-methyl-cellulose and water to 100.

Description

Budapest no. Attorneys at Work Patent Office

5201 9 & ^S / ° O

SERVICE INVENTION

A fertilizer suspension containing a biologically active stabilizer and a process for its preparation

Science Laboratories of the Hungarian Academy of Sciences, Budapest

Bábolna Industrial Corn Producer

Wí) k '-, Joint Venture, Babylna / Oscar DrTTibor

Bp - - W-a- Budenz. /,

Dr. Tamás Székely lech - »- chemist '%' / 4o26. Bp. Balogh Ádám-u. -7 / av / i.

Dr. Gábor Nagy Nagy, Chemical Engineer ¹ <9% / 1119. P. S za ka sits Á rpá d u. 3 2 / b. / dr.Solti (gabor igeeJ-sky / J ^λ > ^ 4 - ^ - γι ^ 4- _f 9%

Zlo23. Bp. Bolyai u. 6 / a. / Dr.Székvölgyi J. / oki.brhxédzm. 9% / 2Booj Tatabánya, Sárberki Itp. 21B-R /

Announcement day r? . ί ^ ííko ^

The present invention relates to a fertilizer suspension containing a biologically active fertilizer and a process for its preparation.

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Dr. Tóth'János who; -agricultural engineer / -29AA--} Bábolna (KinizsÁ-Bái-br- ^ apr / József Varga (pk4. Ag ^ med. Engineer / 9o81 ~) Győruj friendly, (^ eres P.-u. 3o Ferenc Nagy £ & kl. Agricultural engineer) / 9 & ooj Sárvar, (Ba-tthány u. 9 ^ 6. / Ede Horváth beekeeper plant engineer / 9643-} Jakfa \ (feesuth u. 15r / Tibor Csonka mechanical technician / 96 oo) Sárvár / - Constitution 9 ^ y, ΐ

- 2 Slurry fertilizers are increasingly used today.

Their major advantage over other forms of fertilizer is that it is easy, simple to spread and the plants can utilize fertilizer suspensions more efficiently.

However, suspension stability is a major problem with suspension fertilizer compositions.

In the case of an unstable slurry, some of the active ingredient is settled and therefore such fertilizers are less economically useful.

The stability of the fertilizer suspensions and the uniform concentration of the active ingredient are ensured by the use of stabilizing agents. These stabilizers can provide the above effect by increasing the density of the suspension and preventing the settling of the dispersed particles.

According to Japanese Unexamined Publication No. 58042158, stabilization of suspension fertilizer is sodium alginate, polyvinyl alcohol or carboxymethyl cellulose. by adding a stabilizer.

No. 2,362 loo. French Patent Publication No. 5,123,125 discloses a process in which a suspension of a fertilizer containing phosphorus and potassium compounds is stabilized by attapulgite.

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According to Czechoslovak Patent No. 197,493, bentonite is used as a stabilizer for suspension fertilizers.

However, the stabilizing agents listed do not sufficiently guarantee the stability of suspension fertilizers.

It is an object of the present invention to provide a suspension fertilizer containing a stabilizing agent which is more stable than known.

In addition to the stabilizing effect, the stabilizer used in the fertilizer suspension also has a biological effect in the soil.

The above object can be achieved by using a noble clay mineral containing montmorillonite as the main component in the stabilizer. An aqueous slurry of such clay minerals provides increased stability to the slurry.

A major advantage of montmorillonite-containing clay mineral is its ability to ion exchange in the soil, to bind the inclusion compounds and other cations / ammonium, calcium, potassium, etc. and then gradually release them into the soil for vegetation.

Another advantage is its high water retention capacity, which increases the water retention capacity of the soil.

It is also an advantage that the montmorillonite content forms organic complexes with humus and these complexes further enhance the water and nutrient retention properties of the soil.

The complexes formed facilitate the uptake of nutrients by the plants.

The noble clay mineral terminology used in the stabilizing slurry refers to the following composition:

30 to 8o% by weight montmorillonite,

1 to 10 weight percent illite,

2-3% by weight quartz, □ -5% by weight feldspar,

5-4% by weight of calcite or atagonite □ -6% by weight of plagioclase,

2 to 10% by weight of trace element / Ni, Cu, Ti, B, Ba /

3 to 2o by weight of humus.

The fertilizer suspension according to the invention is a suspension

2 to 65 parts by weight of fertilizer, / NP, NK, PK or NPK fertilizer, 1 to 3 parts by weight of stabilizing slurry, 0 to 2 parts by weight of additive / preferably limestone, dolomite, lime slurry, etc. / 5 to 5 parts by weight of thickener, preferably polyvinyl al 'koholj and contains the necessary amount of water for the loo part

The composition of the stabilizing slurry is as follows:

Noble clay minerals containing from 2 to 40 parts by weight per liter of montmorillonite, from 0.5 to 5 parts by weight of an alkali metal salt, from 0 to 5 parts by weight of zeolite (below 10 micron particle size) and in the amount required for the loose part.

·· · ··

The zeolite in suspension, as well as the montmorillonite and montmorillonite-humus complexes, promotes the release of trace elements and nitrogen.

According to the present invention, slurry fertilizers are prepared by mixing a plurality of noble clay minerals, water and, where appropriate, zeolite, from a potassium metal salt of 8 mm-10 cm Stable and / or a slurry, directly or just before use. a mixture of fertilizers and water and, where appropriate, a feed additive and bagasse,

B / A slurry of 8 to 10 cm of noble clay and water is made in a multistage mill and mixed immediately before use with a slurry of fertilizer and water, optionally with a reading additive, a slurry and an alkali metal salt.

In the formation of slag from noble clay minerals, the clay minerals in the system form complexes with humic substances by ion exchange or chemisorption.

Clay minerals are activated by the addition of alkali metal salts, which increases the amount of complexes and improves their soil-improving properties.

The stabilizing slurry according to the invention has an excellent property: extremely high stability.

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- 6 The stabilizing slurry is not required to be used immediately, but can be stored in slurry form for a longer period without risk of separation and only added to the fertilizer slurry immediately before use.

The alkali metal salt used in the stabilizing slurry is preferably sodium carbonate, sodium phosphate, lithium carbonate, lithium phosphate or a mixture thereof.

Preferably the polystyrene is a polyvinyl alcohol or a cellulose derivative.

The advantages of the suspension fertilizer according to the invention are as follows:

- Increased stability

- Ensure release of trace elements and nitrogen retardant, i

- Enhance the water retention capacity of the soil.

- Simple fabrication does not require pre-grinding of the montmorillonite-containing clay mineral and its activation in a separate operation.

Piece clay minerals may also be used to prepare the stabilizing slurry and, if desired, activation may be accomplished by simple addition of the alkali metal salt.

The following slurry fertilizers and their preparation process are illustrated by the following examples:

Example 1

ΝΡ The fertilizer suspension is prepared by dissolving lookg monoammonium phosphate in loo kg water. The mixture was neutralized with 65 kg of 20% ammonium hydroxide, then 100 kg of urea and 4.5 parts by weight of carboxymethylcellulose were added.

The stabilizer is prepared by weighing 5 parts by weight of an 8 cm average lump of montmorillonite, lo wt% illite, 15 wt% quartz, 5 wt% potassium feldspar, 2 wt% calcite into a multistage milling apparatus. raw clay minerals containing.

Synthetic zeolite with a particle size of 9.0 µm, 0.1 parts by weight of sodium carbonate and 93.9 parts by weight of water are added. After intensive milling, a stable slurry is obtained.

3o parts by weight of the slurry thus prepared are added to the above fertilizer slurry and 559 kg of water and the mixture is homogenized by stirring for 2o minutes.

Measure the air permeability of the fertilizer suspension, i.e. the volume percentage of the non-settled, floating dispersant.

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- 8 - Period / H / floating Ability % W / v / 0 loo, o 12 99.5 24 98.5 48 98, p 72 97.5

Example 2

NPK fertilizer suspension is prepared.

The active ingredient is: 2oo kg of phosphoric acid, 10 kg of ammonium nitrate, 10 kg of potassium nitrate.

The suspension has a water content of 254 kg.

The stabilizing agent was prepared in a multi-stage milling machine according to Example 1, consisting of 3,000 kg of lo cm clumps of precious clay mineral in 66 ° kg of water and 4 ° kg of natural zeolite.

The quarry contains 85% by weight of montmoriltonite, 2% by weight of illite, 7% by weight of quartz, 2% by weight of potassium feldspar, 4% by weight of plagioclase and 8% by weight of trace element.

The stabilizing slurry prepared as above is stored for 1 month. Subsequently, 32o kg of the stabilizing slurry and 3o kg of calcium carbonate, 6.4 lithium carbonate and 6 kg of water are added to the fertilizer slurry.

The mixture was homogenized for 35 minutes and the buoyancy was measured as in Example 1.

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Period / H / Floating power /% vol / 0 12 24 48 72 loo, o 98.5 97.9 97.5 97, p

3. Comparative Example

Example 1 was repeated, but using 8o _z um átlagszemcseméretü attapulgite clay mineral montmorillonite instead of the noble-containing preparation of the stabilizer.

The buoyancy of the fertilizer suspension thus stabilized is measured.

Duration / h /

Floatability / vol% / loo

96, p

9o, o

89, p

87, o · · · · · · ···················································· · · · ·

- lo The results show that the stabilizing effect of montmorillonite-containing clay minerals is much greater than that of other clay minerals.

Claims (2)

PATENT CLAIMS CLAIMS 1. A fertilizer suspension comprising a biologically active stabilizer comprising NP, NK, PK, NPK fertilizer active ingredient, additives, water and a stabilizer, characterized in that from 20 to 65 parts by weight of fertilizer, from 1 to 30 parts by weight of stabilizer. containing from 2 to 40% by weight of noble clay minerals containing not less than 3% by weight of montmorillonite and not less than 2% by weight of humus, 0 to 5% by weight of an alkali metal salt, 0 to 5% by weight of zeolite and water containing from about 0 to about 20 parts by weight of a reading additive, preferably ground dolomite, calcium carbonate, lime slurry, &lt; 9-5 parts by weight of sizing agent, preferably carboxymethylcellulose, and water to the extent of about 10 parts by weight. 2. Process for its production, A fertilizer suspension according to claim 1, characterized in that Slurry of A / 2-4% by weight of noble clay minerals containing at least 30% by weight montmorillonite, 2% by weight of humus, 0-5% by weight of alkali metal salt, 0-5% by weight of zeolite and water in a proportion by weight of loo 1 to 3o parts by weight of slurry is prepared and immediately after use, or immediately before storage, mixed with 2o-65 parts by weight fertilizer-heat-o-2o parts by weight reading additive, o-5 parts by weight bar • ** r 9V * • ·· -12 and with a mixture of water for 100 weight rocks, homogenize the resulting mixture B / 2-40 wt%, at least 30 wt # montmorillonite, 2% by weight. slurry containing humus, 0-5 wt.% zeolite and 100 wt.% water is made into slurry, and 1 to 30 wt.% is mixed with a mixture of 20-65 wt. fertilizer immediately before use. your active ingredient, 0-20 parts by weight of the additive Lugoze, 0-5 parts by weight of a siliconizing agent and 100 parts by weight of water of the desired grade, add up to 0.7 parts by weight of the alkali metal salt and homogenize the resulting mixture ·