251 results about "Organic liquids" patented technology

The invention relates to the field of preparation of amino acid water-soluble fertilizers, and discloses a method for preparing an amino acid-containing water-soluble fertilizer by using slaughtering blood of bred livestock and poultry, which comprises the following steps: collecting the blood of the bred livestock and poultry in a slaughter house through a blood collection container, and adding an anticoagulant to obtain an anticoagulant raw material; the preparation method comprises the following steps: heating and disinfecting an anticoagulant raw material, and then adding bacillus subtilis and monopotassium phosphate to carry out enzymolysis treatment, so as to obtain a feed liquid after enzymolysis; then filtering, complexing treatment, ultraviolet sterilization treatment and sterilization are carried out in sequence; carrying out amino acid detection on the sterilized material liquid subjected to enzymolysis, and adding other nutrients to form an organic liquid fertilizer containing amino acid; and finally, carrying out preservative treatment, packaging and warehousing, and storing in a shade place to complete the preparation process of the amino acid water-soluble fertilizer. The invention solves the problems that the existing amino acid water-soluble fertilizer preparation raw materials are less, the amino acid water-soluble fertilizer preparation process is longer, and the environment is polluted due to the discharge of livestock and poultry slaughtering blood waste.

Provided is a medical adhesive agent. The adhesive agent comprises: a water-dispersible copolymer produced by the copolymerization of a monomer mixture comprising a (meth)acrylic acid alkyl ester, a carboxy-group-containing monomer, a nitrogen-atom-containing monomer, and a silane-based monomer; and an organic liquid component in which the number of hydroxyl groups per molecule is more than 1.

The invention provides an organic liquid suspension fertilizer as well as a preparation method and application thereof. Comprising the following components in parts by weight: 10-15 parts of chitosan mother liquor, 12-16 parts of amino acid fermentation mother liquor, 23-27 parts of gibberellin mushroom dreg fermentation liquor, 30-35 parts of vinasse fermentation liquor, 5-10 parts of potassium humate, 1-3 parts of a surfactant, 12-15 parts of a nitrogen fertilizer, 10-14 parts of a phosphate fertilizer, 26-31 parts of a potassium fertilizer, 3-8 parts of a trace element mixture and 35-40 parts of small molecule water. The organic liquid suspension fertilizer prepared by the invention can be used as a crop fertilizer, especially can improve the quality of potatoes and the yield and sugar content of beet, and reduces brown spot.

The invention discloses a green synthesis ammonia and organic liquid hydrogen storage combined device. The device comprises a water electrolysis hydrogen production device, a nitrogen production device, an organic liquid hydrogen storage device, a low-pressure gas compressor, a synthesis gas compressor and an ammonia synthesis device, the water electrolysis hydrogen production device produces hydrogen and conveys the hydrogen to the organic liquid hydrogen storage device and the synthesis gas compressor; the nitrogen making device is used for making nitrogen and conveying nitrogen to the organic liquid hydrogen storage device and the synthesis gas compressor; the organic liquid hydrogen storage device reacts hydrogen-poor organic liquid with hydrogen generated by the water electrolysis hydrogen production device to generate hydrogen-rich organic liquid, nitrogen is introduced into the hydrogen-rich organic liquid for dehydrogenation reaction, and the hydrogen and the nitrogen are input into the low-pressure gas compressor; the low-pressure gas compressor and the synthesis gas compressor compress hydrogen and nitrogen and input the compressed hydrogen and nitrogen into the ammonia synthesis device; and the ammonia synthesis device generates ammonia under the action of the catalyst. The gas-liquid mass transfer efficiency and the hydrogen desorption rate are improved, the energy consumption and the operation and maintenance cost of the compressor are reduced, and accurate adjustment of the hydrogen-nitrogen ratio is achieved.

The invention discloses an efficient liquid organic fertilizer and a preparation method thereof, and belongs to the technical field of organic fertilizers. The organic fertilizer is prepared from the following raw materials in parts by weight: 200-300 parts of livestock breeding wastewater, 50-80 parts of plant straws, 10-20 parts of a pretreating agent, 10-20 parts of EM bacteria, 20-30 parts of a compound microbial agent, 3-10 parts of an accelerant, 1-3 parts of monopotassium phosphate and 0.05-0.2 part of trace elements. The accelerant is composed of sunflower disc extract and sodium laureth sulfate according to the mass ratio of 3: 1; the pretreatment agent is a biochar-TiO2 composite material. According to the method, resource utilization of the livestock breeding wastewater is achieved, the wastewater is converted into the liquid organic fertilizer rich in nutrient elements, high-quality fertilizer resources are provided for agricultural production, harmful substances in the wastewater are effectively removed through combination of biological treatment and physical and chemical treatment technologies, safety and environment friendliness of the organic fertilizer are ensured, and the method is suitable for industrial production. The obtained organic liquid fertilizer has a remarkable effect of improving the yield and quality of potatoes, and has a good application prospect.

The invention relates to the related technical field of electrochemical electrodes, and discloses a preparation process and a use method of an electrochemical composite electrode, and the preparation process comprises the following steps: S1, weighing a certain amount of materials according to a mass ratio of a piezoelectric material to PVDF (or P (VDF-TrFE)) of 1: 20-4: 1, dissolving and dispersing in N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, the preparation method comprises the following steps: adding PVDF (or P (VDF-TrFE)) into a mixture of one or more polar organic liquids such as N, N-dimethylacetamide, dimethyl sulfoxide and the like, stirring or ultrasonically dispersing uniformly to prepare a PVDF (or P (VDF-TrFE)) solution with the mass percent of 5-20%; the composite electrode provided by the invention is low in production cost, simple in preparation method and easy to amplify to realize industrial production, the electro-catalytic performance of the composite electrode in circulating water treatment is remarkably improved through an optimized heat treatment process, and the electrode shows higher electrochemical efficiency in treatment of industrial wastewater containing high-concentration organic pollutants and has good application prospects. And the service life is prolonged to 6000 hours, and is prolonged by 20% compared with the service life of a traditional electrode.

A method of removing hydrogen sulfide from a subterranean geological formation includes mixing a cobalt-imidazolate material with an organic liquid containing one or more unsaturated oil to form a drilling fluid suspension with a pH of 10 or more. The cobalt-imidazolate material is a ZIF-67 and is present in an amount of 0.1 to 2.5 percent by weight of the drilling fluid suspension. The method further includes injecting the drilling fluid suspension in the subterranean geological formation and circulating the drilling fluid suspension in the subterranean geological formation and forming an oil-based mud to scavenge hydrogen sulfide from the subterranean geological formation.

The invention relates to a method for producing cationic starch having a degree of substitution of at least 0.2. The method comprises providing a process mixture comprising starch dispersed in a liquid process medium comprising water and an organic liquid, and interacting the starch with a cationizing agent in a cationizing step. Thereafter, the process mixture comprises a cationic starch dispersed in a liquid process medium, the liquid process medium comprising the reaction by-products formed. The cationic starch is separated from the liquid process medium in a separation step. In a distillation step, the liquid process medium is separated into an organic liquid phase and an aqueous phase, wherein the aqueous phase comprises reaction byproducts. The organic liquid phase is recycled back to any process step in which the organic liquid is present.

The invention discloses a dehydrogenation catalyst and a preparation method and application thereof, and relates to the field of dehydrogenation catalysts, and the preparation method comprises the following steps: taking a carrier, carrying out plasma pretreatment through reaction gas to obtain a pretreated carrier, and loading noble metal on the pretreated carrier to obtain the dehydrogenation catalyst, the reaction gas comprises one or more of oxidizing gas, reducing gas and neutral gas. The dehydrogenation catalyst is prepared by performing plasma treatment on the carrier and then loading the noble metal, and the cyclic stability of dehydrogenation reaction is improved when the dehydrogenation catalyst is applied to the organic liquid hydrogen storage material.

A method of removing hydrogen sulfide from a subterranean geological formation includes mixing a zinc-imidazolate material, ZIF-8, in an amount of 0.1 to 2.5 percent by weight with an organic liquid containing one or more unsaturated oils to form a drilling fluid suspension with a pH of 10 or more. The method includes injecting the drilling fluid suspension in the subterranean geological formation, circulating the drilling fluid suspension in the subterranean geological formation to form an oil-based mud, and scavenging hydrogen sulfide from the subterranean geological formation.

The invention provides a supported bimetallic catalyst and a preparation method and application thereof, the supported bimetallic catalyst comprises a carrier and an active component supported on the carrier, the carrier is a TiO2-Al2O3 composite oxide with an ordered mesoporous structure; the active components are oxides of transition metals and oxides of dispersed metals; the supported bimetallic catalyst has good catalytic activity, is low in cost and simple in preparation method, and can be applied to organic liquid hydrogen storage reaction.

The invention discloses a slurry hydrogen storage fuel cell system, which comprises: a hydrogen storage slurry circulation module for storing and circulating a slurry hydrogen storage material; the slurry hydrogen storage material comprises organic liquid and metal hydride; the fuel cell adopts a liquid metal anode; the fuel cell comprises an anode inlet and an anode outlet; a separator for separating the anode discharge; the metal hydride powder feeder is used for supplementing metal hydride powder to the hydrogen storage slurry circulating module; wherein the slurry hydrogen storage material reacts on a liquid metal anode interface to generate electric energy and form organic liquid vapor; and the organic liquid vapor is discharged into the separator from the anode outlet, is separated, is conveyed into the hydrogen storage slurry circulating module, and is mixed with the metal hydride powder from the metal hydride powder feeder to form a slurry hydrogen storage material. According to the invention, direct power generation of the slurry hydrogen storage material on the fuel cell anode interface is realized, and the power density of the system is greatly improved.

The invention is applicable to the technical field of hydrogen storage, and provides a preparation method of a nickel-based catalyst for organic liquid hydrogen storage, which comprises the following steps: simultaneously dropwise adding a metal salt solution of nickel and a precipitation solution into a carrier suspension for precipitation to obtain a catalyst precursor suspension; wherein the precipitation solution is an alkali solution; aging and filtering the catalyst precursor suspension to obtain a catalyst precursor, and washing, drying and calcining the catalyst precursor to obtain a nickel-based catalyst; grinding the obtained nickel-based catalyst into powder, fully mixing in deionized water, dropwise adding a small amount of noble metal precursor solution, and then stirring and evaporating to dryness; the method is simple in preparation process, the active metal in the prepared catalyst is uniformly dispersed and has good synergism with the noble metal, and the nickel-based catalyst can be used for hydrogenation reaction of hydrogen storage organic liquids such as N-ethyl carbazole, dibenzyl toluene, benzyl toluene, toluene, decahydronaphthalene and biphenyl and has excellent hydrogenation performance.

The invention belongs to the technical field of organic liquid hydrogen storage, and discloses a catalyst and a preparation method thereof, and hydrogenation and dehydrogenation methods of a liquid organic hydrogen carrier. The catalyst is used for hydrogenation and dehydrogenation of a liquid organic hydrogen carrier, the catalyst comprises a nickel element and an aluminum element, and the average particle size of the catalyst is 300-900 [mu] m. The catalyst provided by the invention has relatively high hydrogenation and dehydrogenation activity and long-period stability, meanwhile, the preparation cost of the catalyst is greatly reduced compared with that of a traditional noble metal catalyst, and further commercial application of an organic liquid hydrogen storage technology is facilitated.

The utility model provides a reaction tube cleaning device, and belongs to the technical field of hydrogen energy storage device cleaning. The reaction tube cleaning device comprises: a heating tank for accommodating and heating a reaction tube; the brush is used for cleaning the inner wall of the reaction tube; the cleaning liquid storage tank is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both communicated with the heating tank; the hydraulic machine is arranged between the liquid inlet and the reaction tube. According to the reaction tube cleaning device, the reaction tube is arranged in the heating tank, and the cleaning liquid pressurized by the hydraulic machine is conveyed into the heating tank through the cleaning liquid storage tank, so that the reaction tube can be cleaned by the cleaning liquid under a certain heating condition and certain pressure, and meanwhile, the inner wall of the reaction tube is cleaned by the brush, so that the reaction tube can be fully cleaned; and the device is suitable for small reaction tubes with various specifications in an organic liquid hydrogen storage system.

An ultrasound indicating (USI) device and method for monitoring ultrasonication is provided. The USI device comprises a container comprising a USI formulation. The USI formulation comprises an organic liquid, a pH dye and an activator.

The invention provides an organic liquid hydrogen storage reaction system. Comprising an organic liquid hydrogen storage hydrogenation reaction device and an organic liquid hydrogen storage dehydrogenation reaction device, the organic liquid hydrogen storage hydrogenation reaction device comprises an organic liquid hydrogen storage hydrogenation reaction container and an organic liquid hydrogen storage reaction chamber; the organic liquid hydrogen storage reaction chamber is communicated with a hydrogen-rich hydrogen oil placing container, a hydrogen placing container and a hydrogen-poor hydrogen oil placing container through pipelines respectively; the organic liquid hydrogen storage dehydrogenation reaction device comprises an organic liquid hydrogen storage dehydrogenation reaction container and an organic liquid hydrogen storage reaction chamber, and the organic liquid hydrogen storage reaction chamber is communicated with a hydrogen-rich hydrogen oil placing container, a hydrogen placing container and a hydrogen-poor hydrogen oil placing container through pipelines. By adopting the hydrogen storage device, different organic liquid hydrogen storage reaction chambers can be connected among the hydrogen-rich hydrogen oil placing container, the hydrogen placing container and the hydrogen-poor hydrogen oil placing container, so that more efficient hydrogen addition / dehydrogenation in the organic liquid hydrogen storage process is realized.

The invention relates to the field of impurity separation, and discloses a method for separating impurities in a liquid phase and application, the method comprises the following steps: (1) contacting a liquid-phase raw material with an adsorbent for adsorption to obtain a liquid-phase material flow; the liquid-phase raw material comprises an organic liquid hydrogen storage substance and impurities; the adsorbent preferentially adsorbs impurities in the liquid-phase raw material; (2) carrying out back-flushing desorption on the adsorbent by using part of the liquid-phase material flow to obtain a desorption solution; based on the total mass of the desorption solution, the impurity content in the desorption solution is 2-5%; (3) feeding the desorption liquid into a rectifying tower, carrying out rectification separation, and outputting the obtained tower bottom distillate and the residual part of liquid phase material flow as products; and (4) regenerating the adsorbent after backwashing desorption. The method has the characteristics of high purity of the organic liquid hydrogen storage substance, low cost and no introduction of new impurities.

The invention relates to the technical field of organic liquid hydrogen storage, and discloses an organic liquid hydrogen storage method and an organic liquid hydrogen storage continuous production system.The organic liquid hydrogen storage method comprises the steps that 1, in the presence of an alkylation catalyst, carbazole makes contact with an alkylation reagent for an alkylation reaction, and mixed hydrogen oil is obtained; wherein the alkylating reagent comprises first alkylamine and second alkylamine; the structural general formula of the first alkylamine is represented as R1nNH3-n, n is an integer selected from 1-3, and R1 is selected from C3-C6 straight-chain or branched-chain alkyl; the structural general formula of the second alkylamine is R2mNH3-m, m is an integer selected from 1-3, R2 is selected from C1-C4 linear or branched alkyl, and the number of carbon atoms of R2 is smaller than that of R1; and (2) in the presence of a hydrogenation catalyst, contacting the mixed hydrogen oil with hydrogen for hydrogenation reaction. The method can realize continuous hydrogen storage of the organic liquid, and is high in hydrogenation rate and low in energy consumption.

A method of removing hydrogen sulfide from a subterranean geological formation includes mixing a zinc-imidazolate material, ZIF-8, in an amount of 0.1 to 2.5 percent by weight with an organic liquid containing one or more unsaturated oils to form a drilling fluid suspension with a pH of 10 or more. The method includes injecting the drilling fluid suspension in the subterranean geological formation, circulating the drilling fluid suspension in the subterranean geological formation to form an oil-based mud, and scavenging hydrogen sulfide from the subterranean geological formation.

This invention relates to an aqueous polyurethane composition comprising: a liquid medium comprising at least one organic liquid having a solubility in water of ≥4 g organic liquid / 100 g water at 25°C, and water; at least one polyurethane polymer compound dispersed in the liquid medium; and optionally at least one coating formulation component. The polyurethane composition further comprises at least one thickener comprising at least one anionic polymer selected from anionic polyacrylamide, anionic polymethacrylamide, anionic polyacrylamide-polymethacrylamide, and / or a mixture of at least two thereof, and optionally, 0 to 0.12% by weight, preferably 0 to 0.05% by weight, more preferably 0 to 0.01% by weight, based on 100% of the total weight of the aqueous polyurethane composition, at least one compound selected from unbound or ionicly bound organic amines, ammonia, or a mixture of at least two thereof, wherein the aqueous polyurethane composition has a pH value ≤ 8.5, and wherein the at least one thickener is different from the at least one coating formulation component and the at least one polyurethane polymer. The present invention further relates to a kit-of-parts for preparing a waterborne polyurethane composition, a method for preparing a waterborne polyurethane composition, and the use of the waterborne composition.

This invention relates to the field of fertilizer technology, specifically to an organic liquid fertilizer based on straw enzymatic hydrolysate and its preparation method. The method includes: pretreating corn straw with potassium hydroxide, followed by enzymatic hydrolysis with cellulase and xylanase to obtain the enzymatic supernatant; sequentially treating the supernatant with an ultrafiltration membrane with a molecular weight cutoff of 3000 Da and a nanofiltration membrane with a molecular weight cutoff of 500 Da to collect oligosaccharides with a molecular weight window of 500-3000 Da; partially stabilizing the reducing end of the oligosaccharides with sodium borohydride; pre-complexing with boric acid at pH 8.4-8.8; then sequentially adding relatively low molecular weight sodium polyglutamate, calcium chloride dihydrate aqueous solution, and ultra-high molecular weight sodium polyglutamate to construct a sequential complexation system; subsequently adding potassium nitrate and citric acid aqueous solution; and finally, after filtration at 5 μm and heat treatment at 70℃, obtaining the organic liquid fertilizer. This fertilizer has a high proportion of 500-3000 Da oligosaccharides and a low reducing sugar equivalent, inhibiting storage precipitation and browning, and improving the retention rate of extractable oligosaccharides in the soil.

The present invention belongs to the technical field of catalysis and hydrogen storage, and specifically relates to a method for preparing a foamed sheet catalyst for hydrogen storage / desorption in an organic liquid. A compound containing Pd or Ru is dissolved in a solvent to form a Pd or Ru solution; a nano-carrier and a binder are then added and stirred to obtain a suspension; after the suspension is stirred to a colloidal state, a foamed metal is impregnated therein, and then the impregnated foamed metal is dried and placed in a reduction furnace; finally, reduction is performed under an Ar / H2 or H2 atmosphere to obtain a foamed sheet catalyst for hydrogen storage / desorption in an organic liquid. The method for preparing a foamed sheet catalyst for hydrogen storage / desorption in an organic liquid of the present invention loads the catalyst in a foamed three-dimensional macroporous material with a certain mechanical strength, so that sufficient active sites are exposed in the organic liquid, thereby improving the catalytic activity of the catalyst.

Disclosed are a soft bistable magnetic actuator, a fabrication method thereof, a fatigue testing device, and an auto underwater vehicle. The method for fabricating the soft bistable magnetic actuator includes the following operations: casting a soft precursor by injection molding, wherein the soft precursor consists of a soft deformable portion and a soft peripheral portion surrounded, the soft deformable portion is made of magnetic particles and polymer, and the soft peripheral portion is made of a magnetic particle, a mixture of organic liquid, and polymer; and extracting the organic liquid by an organic solvent shrinks the soft peripheral portion, buckles the soft deformable portion towards one side.

The present invention discloses a method for preparing a bimetallic catalyst for an organic liquid hydrogen storage process. The method comprises the following steps: mixing a nickel salt, a cobalt salt, ethylenediaminetetramethylenephosphonic acid, alanine, and a certain amount of deionized water to obtain a uniform composite active metal precursor impregnation solution; mixing the solution with pseudo-boehmite powder, ethylene glycol, hydrazine hydrate, and a dispersant and ultrasonically dispersing the solution to obtain a suspended fluid; then reducing the active metal component, adding a binder to the obtained semi-dry and semi-wet material, kneading the mixture, and extruding it into strips. Finally, drying the mixture to remove moisture and impurities, thereby obtaining a supported non-precious bimetallic cobalt-nickel hydrogenation catalyst for use in an organic liquid hydrogen storage process. The present invention obtains a supported non-precious bimetallic cobalt-nickel catalyst by adopting a suitable preparation method, which not only improves the activity of non-precious monometallic catalysts in the organic liquid hydrogenation process, but also avoids the high cost problem faced by using precious metal catalysts.

The invention belongs to the technical field of clean energy smelting, and particularly relates to an organic liquid hydrogen storage and fuel cell integrated system and method for hydrogen energy steelmaking. Comprising a solid oxide fuel cell module, an organic liquid hydrogen storage module and a hydrogen energy steelmaking module, high-temperature heat energy and electric energy generated by the solid oxide fuel cell module are transmitted to the hydrogen energy steelmaking module, and medium and low-temperature heat energy generated by the solid oxide fuel cell module is transmitted to the organic liquid hydrogen storage module; the organic liquid hydrogen storage module supplies hydrogen to the solid oxide fuel cell module and the hydrogen energy steelmaking module; a solid oxide fuel cell is adopted and is matched with organic liquid for hydrogen storage, so that efficient and stable hydrogen storage, heat supply and power supply integrated service is provided for hydrogen energy steelmaking; the organic liquid is used for storing hydrogen, so that a stable hydrogen storage service can be provided for hydrogen energy steelmaking, and a hydrogen storage service can also be provided for a solid oxide fuel cell.

The invention discloses a method for preparing a Ni-N-coated SAPO-34 catalyst by recycling coal-based olefin waste SAPO-34, and relates to the technical field of industrial waste catalyst reutilization, alkali treatment is adopted to directionally depolymerize an ordered crystal structure of the waste SAPO-34 catalyst, and carbon substances and macromolecular tar organic matters in a pore structure are exposed, so that the Ni-N-coated SAPO-34 catalyst is prepared. Soluble macromolecular organic matters in the SAPO-34 carrier are removed through efficient extraction to obtain the amorphous SAPO-34 carrier, the amorphous Ni-N-coated SAPO-34 catalyst is prepared by loading Ni and doping N, a macromolecular substrate is enhanced, the active site density can be approached, and the catalytic reaction activity and efficiency are improved; the irregular structure can further reduce the strength of secondary side reaction by increasing the diffusion speed of the macromolecular substrate and the target product. The catalyst is applied to a multi-aromatic-ring organic liquid hydrogen storage system, the hydrogenation efficiency of organic liquid is improved, the production cost is reduced, and disordered discharge is reduced through resource utilization of waste; the preparation process is simple, low in cost and remarkable in resource and environment benefits.

Systems and methods for dehydrating a mixture of organic liquid and water are disclosed. A mixture of the organic liquid and water is fed to a membrane. The mixture is then subjected to process conditions sufficient to cause pervaporation. A permeate comprising a higher weight percentage of water than the weight percentage of water in the mixture is recovered. A retentate comprising a higher weight percentage of organic liquid than the weight percentage of the organic liquid in the mixture is also recovered.

The present invention discloses a LOHC fuel cell power generation device, which releases hydrogen from an organic liquid material for hydrogen storage under the action of a catalyst and supplies it to the fuel cell for power generation. It includes an independent fuel cell chamber and a hydrogen storage and release chamber. A heat exchange structure is provided in the fuel cell chamber, and the heat exchange structure exchanges heat by contacting the liquid in the fuel cell chamber. A heat conduction structure is provided on the heat exchange structure, and the heat conduction structure penetrates out of the fuel cell chamber and inserts into the hydrogen storage and release chamber, and its end forms an enlarged end in the hydrogen storage and release chamber, and exchanges heat by contacting the liquid in the hydrogen storage and release chamber through the enlarged end. Different from the prior art, the present invention does not adopt the method of heat transfer by working fluid circulation, but directly uses a heat conduction structure for contact heat dissipation, and integrally sets the fuel cell chamber and the hydrogen storage and release chamber, thereby improving its integrity and reducing the problem of low heat transfer efficiency caused by too large a distance.

The present invention relates to the field of sanitary devices and in particular it relates to a disposable absorbent mat. usable in general to protect any surface which may come into contact with urine or other type of organic liquid. Said disposable absorbent mat (100) comprises: a liquid absorbing pad (1) having a predefined length and width delimiting an effective area (23); a sheet of liquid-impermeable material (2), coupled laid under said absorbent pad (1), so as to define a first (21) and a second (22) pair of opposite free edges. arranged outside the effective area (23) occupied by said absorbent pad (1); a sheet of liquid-permeable material (3), coupled superimposed on said absorbent pad (1) on the opposite side with respect to said sheet of liquid-impermeable material (2); first lateral closing means of said absorbent pad (1) against the leakage of liquids. Said absorbent mat (100) comprises a first (4) and a second (5) strip of liquid-impermeable material to define second lateral closing means of said absorbent pad (1) against the leakage of liquids, arranged orthogonally with respect to said first lateral closing means. The invention also relates to a process for manufacturing said disposable absorbent mat.