Method removing chemical, in the solar pond

Method
of preparing superabsorbent polymers for improve soil conditioner and Nutrients

 

 

Abstract

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The
present invention relates to potassium acrylate based superabsorbent polymers
(SAPs). Method for preparing superabsorbent polymer are revealed. A monomer is
polymerized by free-radical polymerization in the presence of cross-linker and
initiator for a gel. Which enhancing the soil conditioner by reformed the soil
pore size by realizing water slowly and improve nutrients using less water.
Present SAPS also used in hydroponic farming and save up to 90-95% water. SAPs
have various pore size particles mixed with a liquid which contain nano
nutrient solution. SAPs extent crop production with great efficiency, higher
quality crops, vast bloom and saving irrigation water. SAPs are usable in the
diaper, absorb body fluids, in wound dressings, in tissue engineering, in wire
and cable for water blocking, spill control for cleaning and removing chemical,
in the solar pond for solar energy.

 

 

Description

Method
of preparing superabsorbent polymers for improving soil conditioner and
Nutrients

 Field
of the Invention

This
invention relates to potassium acrylate based superabsorbent polymer, to a
method of manufacturing thereof, a method of formulating the superabsorbent
polymer, furthermore the use of SAPs product for soil conditioner and improve
nutrients. (US 6946189 B2) This procedure also contains a compound comprising
cross-linked potassium based absorbent copolymers together with fast and slow
soluble nano nutrients (US20030097864A1).

Background of the
Invention and Prior Art

Superabsorbent
polymers (SAPs) also known as hydrogel are water-insoluble, hydrophilic
cross-linked polymers, are able to absorb large amounts of aqueous liquids and
nano nutrients in liquid forms, such as potassium, calcium and phosphorus, and
of retaining the absorbed water or liquid nano nutrients under some amount of
pressure or load. It is also retaining the absorbed liquid amount in the normal
atmosphere at a slow speed without any pressure.

The
SAPs are produced by free radical polymerization under preferred use of
ethylenically unsaturated monomers, such as acrylic acid and alkali salts, in
aqueous solution. Absorption properties of polymers can different by selection
of the monomer composition, alkali salt, cross-linkers, initiators, and
polymerization condition and processing for the formation of the polymer gel.
Cross-linking is permitted to the polymer to absorb water or fluids without
dissolving. The initiator may be added in a single or multiple stages, also
multiple initiators may be used. Superabsorbent polymers materials occur in powder
form. The key advantages of SAPs powder are that they have a significantly
higher absorption capacity because of the larger surface area. The swelling
process of SAPs are, when polymer gel contact with solvent it tries to
penetrate into polymer network and create a 3D-molecular network, enlarge at
the same time, osmotic pressure and the network elastic force cause of the
swelling. 

In
an alternative embodiment, a monomer other than acrylic acid may be polymerized
in the presence of an initiator to form a polymer. The example of alternative
monomers includes methacrylic acid or acrylonitrile. The example of monomers
may also include acrylamide or methacrylamide. Some sulfonic acid may also use
for example vinyl sulfonic acid. Moreover, acrylates, such as sodium acrylates
and ethyl acrylates may also be used. Derivatives and mixtures of the
above-listed monomers may also be desirable.

SAPs
may be used as smart materials, for example for fabricating of sensors or
actuators for a wide number of industrial applications. Further application as
absorbent cores in the field of personal hygienic and sanitary field, there
innovative applications such as for example medical field for controlled
release drug formulations, absorb body fluid for example blood, in wound
dressing, artificial muscles, in tissue engineering for improve and restored
tissue functions, in wire and cable for water blocking, as spill control for
cleaning and removing chemicals, in solar pond for solar energy, also used in
agriculture and horticulture for example in devices for the controlled release
of water.

WO2012001707
A1, discloses the non-composites and composites superabsorbent polymers using
multiple monomers.

US
4051086 A, discloses a polyacrylamide polysaccharide graft copolymer treated
with glyoxal to increase its wicking action. The copolymer is applied by
coating on sand or soil particles.

US
5118719 A, discloses an enhancing absorption rate of superabsorbent by
incorporating a blowing agent using a combination of acrylic acid and sodium
acrylate. 

US
7009020 B2, discloses the method of forming superabsorbent polymer products
using cornstarch graft polymerization with acrylonitrile.

US
20020095965 A1, discloses the polyacrylamide suspension for used in agriculture
application.

EP
2535359 A1, discloses the controlled release agriculture product using citric
acid cross-linking of carboxymethylcellulose/hydroxymethylcellulose mixtures.

US
4303438 discloses graft polymers formed from lignosulfate with acrylic acid or
methacrylic acid which are used for improving soil structure. The graft
polymers of this invention are said to be superior as “most of them can be
diluted to any extent and sprayed without clogging of the nozzles.

CA
2549200 A1, discloses methods of making and using a superabsorbent polymer
product including a bioactive, growth-promoting additive using starch graft
polymerization.

US20030097864
A1, discloses hydro absorbent soil conditioner using potassium based acrylamide
cross-linked polymers which are applied as soil additive with various dosage.

The
prior art references do not disclose the process of applying insoluble
superabsorbent polymers to agriculture soils or crops with nano nutrients. In
fact, this property is not thought to be present in most polymers prepared for this
purpose as it is cited as an unexpected and highly desirable property of graft
polymers described in US 4303438.

In
1996 Esposito and co-workers, studying the synthetic process proposed by
Anbergen and Opperman, developed a method for increasing the absorption
properties of the gel, studied mainly on the physical properties of the
material. The basic idea was the induction of microporosity into the polymer
structure, so as to promote absorption and retention of water by capillarity.
Said microporosity was induced during the drying step, which was carried out by
phase inversion in a nonsolvent for the polymer, and the absorption properties
of the material thus obtained were markedly superior to those of the air-dried
gel, according to EP 2535359 A1.