ES2281310B2 - PROCEDURE FOR THE DOSED INTRODUCTION OF ADDITIVES IN PIPES AND IRRIGATION ISSUERS. - Google Patents

Abstract

Procedure for the dosed introduction of additives in pipes and irrigation emitters. Considering certain additives as additives, as well as root growth inhibitors, the procedure consists of incorporating said additives into the pipes and irrigation emitters after the latter is manufactured, specifically by immersing or contacting them with a solution based on said additives. , in order to be suitably absorbed, for subsequent emission to the land in a dosed form. This avoids having to add the additives to the extrusion or injection machines of pipes and irrigation emitters, as has been the case so far, so that any irrigation element already manufactured, can be transformed at any time into a dispenser without further to immerse it in the aforementioned solution, in which the additives are dissolved in a solvent that does not attack the constituent material of the pipes and / or irrigation emitters.

Description

Procedure for the dosed introduction of Additives in pipes and irrigation emitters.

Object of the invention

The present invention relates to a procedure for the introduction of additives, such as nutrients and / or root growth inhibitors, in pipes and irrigation emitters, that is in irrigation facilities by drip.

The object of the invention is to achieve the introduction of said additives in pipes and irrigation emitters in dosed form, after the manufacture of said components, and by absorption of additives by immersion in a solvent containing said additive.

The invention thus falls within the scope of the industry dedicated to the manufacture of irrigation facilities agricultural, especially drip irrigation facilities.

Background of the invention

In the field of underground or drip irrigation, the roots of plants, in their natural tendency to look for water and the nutrients, penetrate the exit holes of the same of the irrigation pipes, causing the obstruction of such holes

Different procedures are known for avoid root intrusion into irrigation pipes. One of these solutions is the incorporation of growth inhibitor root (ICR) or nutrient in the pipe, in the irrigation emitter or in some internal element of said issuer. The herbicide is released very slowly, looking at the ground next to the emitter, being reduced the amount of ICR contributed to the land and limiting the Root growth inhibition effect in the vicinity of the irrigation emitter. This system has proven effective and enduring for at least ten years.

Currently some system manufacturers of irrigation produce and commercialize localized emitters for irrigation Underground. In this sense, two types of emitters, turbulent type and self-compensating type, introducing herbicidal substances either in the body of the integrated emitter of polyethylene, either in a silicone membrane inside the transmitter.

So far only a few have been developed few additive dosage methods of the many methods that are applicable in the underground irrigation field.

The procedures currently employed by incorporation of the aforementioned additives to the emitting pipes they imply in all cases the need to incorporate the themselves during the manufacturing process of such pipes or emitters, as additional charges to be added in the processes of extrusion, injection or molding.

For example, ICRs have been incorporated into powder, mixed with the polymer powder to be used, being manufactured elements of said mixture by melting to pellets or by extrusion. In parallel, different polymers have been used such such as polyethylene, polypropylene, PVC, etc.

Frequently, the Root growth inhibitors (ICR) to pipes by dosage on active carbon and addition of said active carbon saturated additive as a load together with the other components that they will form the pipe material, such as together with the polyethylene or the binding material chosen to extrude the pipeline.

Ingredients have also been dosed during Extrusion, injection or component molding processes by direct addition of the component or the same microencapsulated during these processes.

These ways of dosing the components in the materials chosen, in its practical industrial application, presents numerous inconveniences among which we will mention some:

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Obliges to manufacture the chosen element with different compositions if you want to have elements of different doses (for example for vary the dosage according to the culture). For a particular case how can it be to incorporate an ICR in an issuer, if you wish to have of issuers with different contents in the ICR, it is necessary manufacture emitters of different compositions.

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The additives have to be stable at manufacturing temperature of the element. For example for extrusion at 200 ° C the ICR must be stable at that temperature and with a low vapor pressure to avoid losses due to volatilization during the process.

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If he additive (ICR) is toxic, all those procedures involve extraordinary precautions in the manufacture of the components They contain it.

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Whether manufacture elements with different additives, or a different line for each composition or can be produced contamination (for example in the cooling water of the extruded pipes).

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It is not possible to increase the dose achieved with a composition without returning to manufacture a different element.

Methods such as those mentioned above and others related to the same subject, appear among others, in the following documents:

- Rodney Ruskin ; Patent GB2174884 ( 1986 )

- Rodney Ruskin ; Patent WO 03039251. PCT / US02 / 35183 ( 2003 )

- Burton F., Cataldo D., Cline JF, Skiens W. E; Patent US5116414 ( 1992 )

- Palma G., Alvear M., Slazar I .; Bowl. Soc. Chil. Quim. , 47 , 175-180 ( 2002 )

- Lagaly G .; Patent DE 2742912 ( 1979 )

- Ducol JP; Patent WO2007000527 ( 2007 )

- Spadotto O .; Patent EP 1783414 ( 2007 )

- Blott PL, Greener B., Hartwell EY, Lee-Webb J. Nicolini D .; Patent WO2007031765 ( 2007 )

- Eckstein E., Hui PS, ECKSTEIN G .; US2002104903 ( 2002 ),

- Amsellem M .; Patent FR2786363 ( 2000 )

- Dinur E., Gorney M .; Patent EP0241836 ( 1987 )

- Lambert G., Buluschek B .; Patent EP0970602 ( 2000 )

- Brown RD, Pitchford EJ, Plotkin M., Christen HD, Dumitrascu O; Patent US4726520 ( 1988 )

- Spencer Lloyd ; US4095618 ( 1978 ).

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Description of the invention

The procedure that the invention proposes allows the incorporation of additives, that is to say nutrients and / or root growth inhibitors, in different elements components of underground irrigation systems, after manufactured said components.

As such components it is possible to mention the own ones underground irrigation pipes, irrigation emitters or drippers of any type, whether turbulent, self-compensating, etc., emitter components such as membranes for anti-suction, flow regulation, etc. He procedure is also applicable to specific components of compositions and designs suitable for use as additive dispensers to be introduced into the irrigation pipes by The same procedure as the issuers.

The procedure consists in submitting to said immersion elements or contact with additive solutions to incorporate in an appropriate solvent. By performing this simple procedure you get dosages of Radical Growth Inhibitors (ICR) suitable in each type of support just by changing the conditions of this immobilization by absorption.

The immobilization conditions can be summarized as follows:

Solvent.- It must be a bad solvent of the elements that will contact him or will be submerged in the same, preferably it should be little polar and its boiling point high, especially aromatic naphtha (CAS type 0064742-94-5).

Immobilization times.- For each case you must verify the dosage added to each time, since by variation of this parameter you can control the amount of additive incorporated. The times will be between 0.5 minutes and 80 days, although the most frequent cases are in the range of 1 to 10 days.

Immobilization temperatures.- They will be between -20 and 275ºC being a suitable temperature for In many cases, 25ºC.

Post-immobilization treatments.- In most cases it will be necessary to wash the elements after the immobilization time has passed. A case Frequent solvent suitable for washing is to use water or high salt water.

Preferred Embodiment of the Invention

The process of the invention is illustrated. through a series of examples of practical realization, in which, without limiting the scope of the invention, different are shown dosage conditions.

The examples are sorted and classified according to to some specific applications developed and verified experimentally, within the broadest group of applications that You have this procedure.

Among the ICRs to be immobilized through Irrigation elements include trifluralin, benfluralin, ethalfluralin and diuron.

For the preparation of absorbates in bottles of appropriate capacity, such as 250 ml, elements are placed of irrigation with an approximate weight per element of 3 grams, adding an appropriate solvent solution of so that they are immersed in it. They remain in the dissolution at room temperature for five days and subsequently dried and washed with running water for five minutes, to finally dry with a stream of air at room temperature.

Example 1 Dispensers with absorbed trifluralin such as ICR Application: Incorporation to underground irrigation pipes for prevent root intrusion into emitters

Dispensers obtained as described in the preparation of absorbates using treflan (50% trifluralin in solvent) are introduced into an irrigation pipe following the same sequence as the transmitters so that after each issuer include a dispenser (alternatively the number can be varied of dispensers).

The underground irrigation pipes obtained guarantee a dosing rate and a content in stable trifluralin along the irrigation line. Between his applications, it should be noted that it allows to design irrigation lines with different ICR loads depending on the crop to which they are intended and depending on flow rates and hours of irrigation just by varying the number of dosing elements to be introduced per meter of pipe. (0.2; 0.5; 1, 2 etc.).

Example 2 Dispensers with absorbed diuron as ICR Application: Incorporation to underground irrigation pipes for prevent root intrusion into emitters

Analog construction and applications that in the example 1, can be used in synergistic combination with the example one.

Example 3 Emitters (drippers) with trifluralin as ICR Application: Underground irrigation pipes to prevent root intrusion into emitters

In the preparation of absorbates on emitters Irrigation of any kind can be done with good results by immersion of oteros in treflan (trifluralin al 50% in commercial aromatic naphtha solvent (CAS 0064742-94-5) during times between 5 and 8 days at room temperature.

Claims (8)

1. Procedure for the dosed introduction of additives in pipes and irrigation emitters, specifically additives consisting of nutrients and / or inhibitors of root growth, in underground irrigation pipes, dosers, emitters or other components, characterized in that said components After manufacture, they are immersed or contacted with solutions of the corresponding additives in an appropriate solvent. 2. Procedure for the dosed introduction of additives in pipes and irrigation emitters, according to claim 1, characterized in that the immersion or contact is carried out for times between 0.5 minutes and 80 days, at temperatures in turn between - 20 and 275 ° C. 3. Procedure for the dosed introduction of additives in pipes and irrigation emitters, according to previous claims, characterized in that one or more solvents of such nature are used in the same that in them the pipes, dosers, emitters or other elements of insoluble are insoluble. The irrigation facility. 4. Procedure for the dosed introduction of additives in pipes and irrigation emitters, according to previous claims, characterized in that high boiling solvents are used therein, especially aromatic naphtha. 5. Method for the dosed introduction of additives in pipes and irrigation emitters, according to previous claims, characterized in that after the time of contact or immersion of the additives with the components, the latter are washed with water or water of high saline concentration. 6. Method for the dosed introduction of additives in pipes and irrigation emitters, according to previous claims, characterized in that the element used is an emitter, dropper or a tube fragment, which is immersed in a solution of inhibitor of root growth at temperature ambient. 7. Method for the dosed introduction of additives into pipes and irrigation emitters, according to one or more of the preceding claims, characterized in that the root growth inhibitor is trifluralin, benfluralin, ethalfluralin or analogous nitroaniline. 8. Method for the dosed introduction of additives into pipes and irrigation emitters, according to any of claims 1 to 6, characterized in that the root growth inhibitor is Diuron.