3267 results about "Hydrogen phosphate" patented technology

Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.

Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.

The invention belongs to the field of a biomaterial, in particular to a preparation method for hydroxyapatite / polylactic acid composite biological coat on magnesium alloy surface, and solves the problem that an electrolytic deposition hydroxyapatite (HA) coat is not quite compact through sealing treatment of polylactic acid, so that the composite coat can improve corrosion resistance of magnesiumalloy in human body fluid remarkably, and biological degradability of the composite coat is used for adjusting service cycle of the magnesium alloy in vivo. The preparation method is as follows: the magnesium alloy is subjected to electrolytic deposition in water solution consisting of calcium salt, dihydrogen phosphate or hydrogen phosphate or other additives, so as to obtain a mixture coat of several calcium phosphates; the mixture coat is treated by alkali metal hydroxide solution and then transformed into an even HA coat; the HA coat is soaked in polylactic acid solution and subjected to the sealing treatment; and finally the HA coat is dried to obtain the hydroxyapatite / polylactic acid composite coat. The preparation method which combines biological activity of the HA and biological degradability of the polylactic acid organically is used for corrosion protection of the magnesium alloy in biotic environment.

The invention discloses an alkali-free liquid setting accelerator which is prepared from the following components by weight percent: 18-40% of hydroxycarboxylic acid, 1-5% of phosphoric acid, 15-30% of aluminium hydroxide, 0-5% of alkylol amine, 0.01-0.2% of defoaming agent and the balance water. The alkali-free liquid setting accelerator of invention does not contain alkali metal ions, sulfate ions and other corrosive materials, is safe to use and has no bad effect on the durability of sprayed concrete, thus being capable to be used in the construction of sprayed concrete.

The invention provides a preparation method of drug and protein sustained-release alginate hybrid gel. The preparation method comprises the steps of preparing calcium alginate hydrogel, then soaking the calcium alginate hydrogel in inorganic salt solutions including trisodium phosphate, diammonium hydrogen phosphate, sodium silicate, sodium carbonate, sodium oxalate and the like at certain concentration to swell for a certain period of time, and soaking the swelled calcium alginate hydrogel into an aqueous solution of drugs and proteins with calcium ions at certain concentration for crosslinking for a period of time, thus obtaining the drug and protein sustained-release alginate hybrid gel. The calcium alginate hydrogel disclosed by the invention can be in the shape of a membrane, a microballoon, a fiber and the like. The method disclosed by the invention is simple to operate and does not adopt any poisonous and harmful solvent; the activity of the immobilized protein is high; the materials are good in biocompatibility; and the drug and protein sustained-release alginate hybrid gel is good in slow release performance, and has good application prospect in the fields of tissue engineering, controlled release, medicine and health, and the like.

The invention discloses a goat forage and a preparation method thereof. The goat forage is composed of the following raw materials, by weight, 50-60 parts of sorghum straw powder, 25-30 parts of Chenopodium album Linn. powder, 20-30 parts of pine leaf, 10-15 parts of Lolium perenne L., 15-20 parts of bagasse, 8-12 parts of Herba Taraxaci, 15-25 parts of soybean meal, 1-2 parts of a starter, 40-50 parts of corncob, 15-25 parts of rice bran, 10-15 parts of sunflower receptacle, 4-6 parts of a lyophilized powder additive, 3-5 parts of shell powder, 5-10 parts of zeolite powder, 3-5 parts of soybean oil, 2-4 parts of sodium alginate, 0.5-0.8 parts of calcium hydrogen phosphate, 0.01-0.02 parts of potassium iodate and 0.3-0.5 parts of salt. The forage contains all nutrition required by the growth of goats, guarantees the healthy production of the goats, provides healthcare values, and raises the growth speeds of the goats.

The present invention relates to a salt of carvedilol and / or corresponding solvates thereof, compositions containing such carvedilol and / or corresponding solvates thereof, and / or methods of using the aforementioned compound(s) in the treatment of certain disease states in mammals, in particular man. The present invention further relates to carvedilol phosphate salts, and / or solvates thereof, which include a novel crystalline form of carvedilol dihydrogen phosphate (i.e., which is the dihydrogen phosphate salt of 1-(carbazol-4-yloxy-3-[[2-(o-methoxyphenoxy) ethyl]amino]-2-propanol) and / or carvedilol hydrogen phosphate, etc.) and / or other corresponding solvates thereof, compositions containing these carvedilol phosphate salts and / or solvates, and methods of using the aforementioned salts and / or solvates to treat hypertension, congestive heart failure and angina, etc.

The invention discloses an inorganic phase-change material and a preparation method thereof. The inorganic phase-change material comprises at least one of a thickening agent and a water-retaining agent, and main thermit, nucleating agent, pH regulator, heat conducting agent, and water, wherein the main thermit is eutectic salt of sodium sulfate decahydrate and sodium hydrogen phosphate docecahydrate. The preparation method comprises the following steps: adding the main thermit in water, stirring in 40-45 DEG C water bath until completely fusing, adding the nucleating agent, the pH regulator, and the heat conducting agent and fully stirring to completely dissolve the nucleating agent and the pH regulator and uniformly disperse the heat conducting agent, then adding at least one of the thickening agent and the water-retaining agent and stirring to uniformly disperse the thickening agent or completely expanse the water-retaining agent, so as to obtain the inorganic phase-change material. The inorganic phase-change material of the invention has the characteristics of noninflammability and no toxicity, the phase change temperature is 21-27 DEG C, the latent heat of phase change is 214 kJ / kg, and the inorganic phase-change material has no attenuation of performance after 1000 weeks of the solidification-fusing cycle.

A process for preparing the collagen sponge includes such steps as extracting collagen in acetic acid by digestion of pepsinum, filtering, taking supernatant, neutralizing by sodium hydroxide, salting out in sodium chloride solution, centrifugal separation of deposit, dissolving it in acetic acid, dialyzing by acetic acid and then by the solution of bisodium hydrogen phosphate, and freeze drying.

The invention relates to an antibiotic-free piglet conservation material and a preparation method thereof. The conservation material comprises the following raw materials of puffed corn, wheat, a base material, efficient cream, soybean meal, fermentation soybean meal, whey powder, composite yeast, rice protein powder, stone powder, calcium hydrogen phosphate, lysine, methionine, threonine, choline chloride, liquid phytase, liquid xylanase, a acidifying agent, sodium butyrate and a premix compound. The antibiotic-free piglet conservation material can increase immunity of the piglet, prevents the piglet from generating drug resistance and appearing drug residue problems, maintains stability of intestinal flora, and improves digestion and absorption for forage of the piglet.

The invention relates to a curing agent for treating heavy metal pollution and a heavy metal curing method. The curing agent is prepared from following raw materials, by mass, 30-70 parts of a curing framework material, 20-60 parts of a curing cementing material and 5-10 parts of a curing promoter. The curing framework material is at least one of fly ash, blast furnace slag, carbide slag and calcined coal gangue powder; the curing cementing material is at least one of ordinary Portland cement and lime; and the curing promoter is at least one of potassium hydrogen phosphate, sodium hydrogen phosphate and aluminum sulfate. The heavy metal curing method includes following steps: mixing the curing agent, solid waste and water with stirring into paste to form a curing body, wherein a usage amount of the curing agent accounts for 30-50% of the dry weight of the solid waste; and maintaining the mixed curing body at normal temperature under a relative humidity of 90% for at least seven days, thereby finishing the heavy metal curing process. By means of the curing agent and the heavy metal curing method, a heavy metal curing efficiency is high and a treatment cost is low.

A method for manufacturing a cathode active material for a lithium rechargeable battery, including: selecting a first metal compound from a group consisting of a halide, a phosphate, a hydrogen phosphate and a sulfate of Mg or Al; selecting a second metal compound from a group consisting of an oxide, a hydroxide and a carbonate of Mg or Al; combining the first metal compound and the second metal compound to obtain a metal compound, the metal compound containing either Mg or Al atoms; mixing a lithium compound, a transition metal compound and the metal compound to obtain a mixture; and sintering the mixture.

The invention provides a feeding combination for brooding layers before six-week old, which includes a feeding I for layers before two-week old and a feeding II for layers between three to six-week old, wherein the feeding I comprises corn, puffed grains, puffed soybean meal, puffed soybeans, fermented soybean meal, insect protein, one level steam fish meal, plant oil, monosaccharide or disaccharides, calcium hydrogen phosphate, limestone powder, baking soda, compound trace elements, amino acid, choline chloride, salt, anti-stress agent, multi-vitamin, compound enzyme preparation and phytase raw materials; and the feeding II comprises corn, soybean meal, fermented soybean meal, puffed soybeans, insect protein, one level steam fish meal, plant oil, monosaccharide or disaccharides, calcium hydrogen phosphate, limestone powder, baking soda, compound trace elements, amino acid, choline chloride, salt, anti-stress agent, multi-vitamin, compound enzyme preparation and phytase. Compared with the existing layer feeding, the phase combination feeding is more reasonable and scientific, and the immunity and the survive rate of layers are obviously improved and the morbidity is obviously decreased.

The invention relates to a condensate bacillus feed additive and a preparation method, belonging to the technical field of microbial feed additives. The additive uses one or several of the fish meal, soybean meal, cottonseed meal, urea, ammonium sulfate, diammonium hydrogen phosphate, soybean peptone and yeast extract as the nitrogen source, and also takes one or several of the glucose, lactose, starch, cane sugar, maize flour and bran as the carbon source for fermentation; the number of viable bacteria reaches more than 1 multiplying 109 CFU / ml; after the additive is further concentrated and dried or directly adsorbed to the carrier, bacillus powder is obtained through spray-drying, and the number of viable bacteria reaches more than 1 multiplying 1010 CFU / g. The novel bacillus product produced with the submerged liquid fermentation method provided in the invention is free from toxic side effects, drug resistance and residue; the product can endure processing, intestinal habitat and storage.

The invention discloses a biological non-antibiotic complete feed for piglets and a preparation method thereof, and belongs to the technical field of animal feed. The invention solves the defects that current piglet feed rich in antibiotics destroys the intestine colony balance of piglets and reduces the piglet immunity. The feed comprises main ingredients of corn, extruded corn flour, dehulled soybean meal, wheat bran, degreased rice bran meal, peanut meal, germ meal and corn alcohol lees. The preparation method is as below: first fully stirring to mix stone powder, calcium hydrogen phosphate and salt into an additive semi-finished product, then adding corn and extruded corn powder, spraying oil for stirring granulation, so as to obtain biological non-antibiotic complete feed for piglets. The feed provided by the invention is mainly used for the piglets with yet incompletely developed immune system.

The invention discloses a special feed, prepared from distiller's grains, for a laying hen during an egg producing period. The feed comprises the following main raw materials: corns, bean pulp-43, rapeseed meal, the distiller's grains, DDGS (distillers dried grains with soluble), corn husks, stone powder, calcium hydrogen phosphate and a laying hen premix. The feed prepared by adopting an enzymatically hydrolyzing and fermenting process is good in absorptivity, the laying rate of laying hens is high, the production cost of the feed is reduced, and remarkable economic benefits are achieved.

The invention discloses a low-protein amino acid balance daily ration, a preparation method and the application thereof. The daily ration comprises the components based on parts by weight: 68-80 partsof corn, 3-20 parts of bean pulp, 6-20 parts of wheat bran and 4-5 parts of pre-mixed material, wherein the pre-mixed material comprises the following components: pig multi-vitamin, pig compound trace element, lysine, methionine, threonine, tryptophan, choline chloride, calcium carbonate, calcium hydrogen phosphate, phytase, common salt, ethoxy quinoline, trimethylamine B lactone, sodium glutamate and zeolite powder. Based on summary of the existing experimental data, the low-protein daily ration combines the actual conditions of China, utilizes the latest data information of raw materials made in China, fully takes the organic combination of the pre-mixed material and the main raw materials into account, and adopts a net energy system structure and a new nutrition model, thus developingthe utilization rate of feed to the utmost extent on the premise of ensuring the quality of animal products.

The invention discloses an extruded hard pellet feed for lactating sows, which is prepared by the following raw materials in parts by weight: 50-55 parts of corn, 3-4.5 parts of imported super steam fish meal, 3-5 parts of fermented soya bean meal, 8-10 parts of flour, 10-15 parts of wheat, 13.5-15.1 parts of non-transgenic soya bean, 2-4 parts of rapeseed meal, 5-10 parts of extruded-soybean, 1-2 parts of mineral substance premix, 0.2-0.3 parts of vitamins premix, 1.0-2.0 parts of calcium hydrogen phosphate, 2.5-4 parts of soybean oil, 1-2 parts of calcium propionate and 0.1-0.2 parts of oligosaccharide. The extruded hard pellet feed is prepared by tempering the raw materials in the formula by using a double-shaft squeezing well-done extruder under a certain condition and then curing under a certain curing condition. The crude protein of the extruded hard pellet feed is greater than 16.2%, the curing degree is above 80%, the extruded hard pellet feed has comprehensive nutrition and extrusion, the anti-nutrition factors are destroyed, and after the extruded hard pellet feed is used for feeding pregnant sows, the birth weights of piglets are above 1.6 kg in average.

An o-chloroaniline production method takes o-nitrochlorobenzene as raw material and is characterized in that the o-nitrochlorobenzene is dissolved in alcohol solvent in the presence of catalyst and additive and reacted with hydrogen at 10-120 DEG C and under 0.3-4.0 MPa; the reaction process is continuous reaction; after the completion of the reaction, the o-chloroaniline is obtained through treatment, wherein, the catalyst can be selected from one of the following: Ni / Al2O3, Raney Ni, Pt / C and Pd / C; while the additive can be selected from one, or two, or three of the following compounds: cyclohexylamine, ethylenediamine, ethanolamine, diethanolamine, triethanolamine, pyridine, liquid ammonia, ammonium bicarbonate, ammonium carbonate, sodium carbonate, sodium bicarbonate, potassium bicarbonate, potassium carbonate, potassium hydrogen phosphate, potassium dihydrogen phosphate, sodium hydrogen phosphate and sodium dihydrogen phosphate; the dosage of the catalyst takes up 0.05% to 20% of the mass of the o-nitrochlorobenzene; the dosage of the additive takes up 0. 5% to 20% of the mass of the o-nitrochlorobenzene; the alcohol can be methanol or ethanol; the dosage of alcohol takes up 30% to 150% of the dosage of the o-nitrochlorobenzene; the continuous reaction is realized through 1 to 6 tank reactors which are connected in series.

The invention belongs to the field of feeds, in particular to a feed for meat duck. The feed comprises the following components by weight: 10 to 40 parts of crude protein, 40 to 80 parts of corn flour, 20 to 50 parts of peanut meal, 10 to 30 parts of soybean meal, 1 to 4 parts of calcium hydrogen phosphate, 5 to 15 parts of wheat, 1 to 5 parts of salt, 5 to 20 parts of a premix, 1 to 5 parts of calcium carbonate, 5 to 15 parts of sesame meal, 5 to 20 parts of rapeseed meal, 1 to 4 parts of methionine, 2 to 8 parts of fish bone meal, 2 to 7 parts of plant extract, 10 to 20 parts of cottonseed meal, 10 to 20 parts of shell powder, 2 to 8 parts of choline, 2 to 7 parts of trace elements, 2 to 9 parts of plant oil, 1 to 5 parts of a compound enzyme preparation, 1 to 4 parts of amino acid, 1 to 4 parts of zinc sulfate, 2 to 6 parts of yeast powder and 4 to 12 parts of rice bran. According to the invention, amino acid is balanced and the plant extract is added on the basis of original common daily ration so as to improve immunity of meat duck; a protein feed or amino acid balanced feed especially applicable to duck is a low-protein feed in essence; a variety of raw materials are cooperatively used in the invention, so protein content of the feed is reasonable, which enables meat duck to grow fast and a marketing cycle of meat duck to be shortened; addition of the plant extract improves disease resistance of meat duck.

A flame-retardant resin composition which comprises a base resin and a flame retardant comprising (A) a calcium hydrogen phosphate and (B) at least one ingredient selected among (B1) a phosphorus compound, (B2) a nitrogen compound, (B3) a boron compound (such as a metal borate), (B4) a silicon compound (such as a (poly)organosiloxane or zeolite), and (B5) a metal compound (such as a metal hydroxide or metal oxide). The calcium hydrogen phosphate (A) may be, for example, a substantially anhydrous one. The phosphorus compound (B1) may be a (poly)phosphoric acid salt, a condensate of an organophosphorus compound, red phosphorus, etc. The nitrogen compound (B2) may be a salt of an aminated cyclic nitrogen compound with an oxyacid, a salt of an aminated cyclic nitrogen compound with a hydroxylated nitrogen compound, a urea compound, etc. The resin composition can have flame retardancy without the need of containing a halogenated flame retardant.

A substantially dry, flowable adjuvant compositions comprising, based on 100 parts by weight (“pbw”) of the adjuvant composition: (a) from about 25 pbw to about 75 pbw of a polysaccharide and (b) from about 75 pbw to about 20 pbw of a salt composition. In one embodiment, the salt composition is diammonium hydrogen phosphate, sodium carbonate or a combination thereof, and the polysaccharide is a derivatized guar. Also disclosed are methods of preparing such agricultural compositions comprising adding, to a heel solution, (a) a water dispersible adjuvant composition, in an amount effective to provide deposition and / or drift control properties, comprising, based on 100 pbw of the adjuvant composition: (i) from about 25 pbw to about 75 pbw of a polysaccharide, and (ii) from about 75 pbw to about 20 pbw of a salt composition, wherein an aqueous solution of the adjuvant composition has a pH value of between about 7 and about 12, and (b) an effective amount of an active. The adjuvant composition can further comprise (iii) from about 20 pbw to about 30 pbw of a dispersing agent, wherein typically the dispersing agent is sodium polyacrylate.

The invention discloses an additive for boosting maillard reaction of recombined tobacco leaves and a method for preparing the tobacco leaves by using the additive. The additive comprises 0.5-10% of diammonium hydrogen phosphate, 0.5-10% of ammonium glycyrrhetate, 0.5-8% of L-Aspartic acid, 0.5-10% of ammonia water, 0.5-10% of L-glutamic acid, 0.5-15% of coffee extractives, 1-20% of xylose, 0.1-10% of black tea extractives, 0.5-15% of burley tobacco paste, 1-10% of cured tobacco extractives, 0.1-8% of chamomile extractives, 1-8% of succinic acid, 1-10% of water-soluble metal complex, 7-40% of propylene glycol and the balance of water. The speed of the maillard reaction in the stages of extracting and concentrating tobacco materials is accelerated by the additive, so as to increase the fragrance of the tobacco leaves, reduce the wood flavor and relieve irritation. When the additive is used for preparing the tobacco leaves, the production technology is not changed and equipment is not added; the usage method is simple; the raw materials of the additive are easily obtained; and the cost is low.

The invention relates to the field of livestock breeding technology, which concretely relates to composite forage for controlling diarrhoea of pigling, and the forage is prepared by the following raw materials by weight: 100-120 parts of corn, 30-40 parts of rye bran, 25-30 parts of soybean meals, 30-35 parts of corn straws, 12-15 parts of bean curd residues, 18-20 parts of wheat middling, 3-4 parts of imported fish meals, 15-18 parts of dried yellow rice or millet wine residues, 3-4 parts of calcium hydrogen phosphate, 1-2 parts of magnolia barks, 2-3 parts of areca peels, 1-2 parts of agastache, 2-3 parts of gingers, 10-12 parts of Memorialis herbs, 6-8 parts of sweet potato peel, 4-5 parts of Compositae herbs, 4-5 parts of fried lablab bean powder, a proper amount of salts and 4-5 parts of feeding promoting agents. The prepared pigling forage is digestible and palatable, and has the nutrition components which meets rapid growth and development of pig, and magnolia bark, areca peel, agastache, ginger and other Chinese herbal medicine components have efficacies for moving qi, removing food retention, dissipating cold; and the fried lablab bean powder is matched, thereby the product can effectively control symptom of pigling diarrhea and enhance pigling physique.

The invention discloses feed for preventing diarrhea of weaning piglets. The feed consists of the following components in parts by weight: 200-300 parts of corn flour, 200-300 parts of rice meal, 100-180 parts of expanded soybean meal, 30-50 parts of fish meal, 220-270 parts of soybean meal, 80-120 parts of whey powder, 80-120 parts of glucose, 50-100 parts of serum concentrate, 20-45 parts of soybean oil, 20-45 parts of calcium hydrogen phosphate, 30-60 parts of calcium formate, 5-15 parts of lysine, 1-3 parts of methionine, 3-6 parts of threonine, 5-10 parts of compound trace elements, 1-2 parts of compound vitamin, 1-2 parts of probiotics, 10-20 parts of short chain fatty acids, 5-8 parts of organic compound acid, 0.5-1 part of enzyme preparation and 1-2 parts of phagostimulant. The feed provided by the invention can be used for effectively avoiding the negative growth of the weight of piglets, reducing the mortality rate of piglets subjected to weaning and the incidence of disease (diarrhea), realizing the rapid growth of the piglets, and obviously shortening the production cycle of the piglets.

The invention discloses non-resistant dust-free piglet creep formula feed and a preparation method thereof. The feed is prepared from the following components: corns, fermented corns, soybean meal, fermented soybean meal, expanded soybean flour, expanded corn flour, imported fish meal, spray-dried plasma proteins, dried porcine solubles, powdered whey, soybean oil, sucrose, molasses, sodium glutamate, a feeding promoting agent, Yibao phospholipid, yeast autolysate, an acidifying agent, stone powder, calcium hydrogen phosphate, table salt, 98.5 percent of lysine, 98.5 percent of threonine, 10 percent of tryptophan, special compound enzyme for early-weaned piglets, phytase enzyme, a micro-ecological preparation, a Chinese herbal medicine heath preserver, antibacterial peptide, immunopotentiator, 50 percent of choline chloride and a premix. The preparation method comprises the following steps: firstly, separately preparing granulated feed products and powdery feed products; and then mixing the granulated feed products with the powdery feed products to obtain the non-resistant dust-free piglet creep formula feed. According to the feed disclosed by the invention, antibiotics are not added, a formula is scientific, the dust of the product is low, the palatability and the immunity are improved, and a diarrhea ratio of piglets is reduced.

The invention relates to a feed of laying breeding geese, and the feed comprises, by weight: 28-32 parts of corn, 18-22 parts of paddy, 8-12 parts of wheat bran, 2-3 parts of fish meal, 13-18 parts of soybean meal, 1-3 parts of trace element, 1-3 parts of calcium hydrogen phosphate, 0.01-0.03 parts of methionine, 0.01-0.011 parts of multi-vitamin, 0.01-0.03 parts of choline, 0.073-0.078 parts of vitamin AD, 0.09-0.11 parts of sodium selenite, 3-5 parts of stone powder, 8-12 parts of grass meal and 0.20-0.25 parts of grit. The feed of laying breeding geese in the invention has extensive material source, low cost and simple processing technology. Breeding geese fed with the feed of the invention can have a high laying rate and a prolonged laying period.

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for diammonium hydrogen phosphate. A diammonium hydrogen phosphate product is prepared by subjecting a high pure urea phosphate solution and ammonia to a double decomposition reaction, reacting for 20-60 min under stirring and at a temperature of 50-80 DEG C by controlling a pH value at 7.8-8.2. Physical and chemical indexes of the diammonium hydrogen phosphate product are as follows: the total nutrient content of diammonium hydrogen phosphate is higher than 74%; the content of total nitrogen is 21.02-21.20%; the content of phosphorus pentoxide is 53.0-53.52%; moisture content is 0.25-0.32%; the content of water insoluble substances is 0.087-0.096%; and the content of fluoride is 0.1-0.14%. The diammonium hydrogen phosphate product fully meets an industrial first level product standard.

The invention relates to an oxo-vanadium phosphate catalyst, and a preparation method and application thereof. The catalyst is prepared through the following steps: preparing a precursor by performing ionothermal synthesis on vanadium pentoxide or metavanadate and phosphate or biphosphate used as raw materials in ionic liquid or eutectic mixture solvent at 120-180 DEG C under normal pressure; and then roasting. The synthesis method is operated under normal pressure, is safe and convenient, and has low requirements for equipment. The catalyst prepared through the method has a special spherical or claviform shape, has high specific surface area and can be used for cyclohexanol oxidation reaction.