10 results about "Ammonium bicarbonate" patented technology

A one-step process for preparing both cyanuramide and the ammonium hydrogen carbonate/sodium carbonate and ammonium chloride features that the synthetic amonia is directly delivered to the cyanuramide preparing step, where it is preheated to 350-400 deg.C and used as gas carrier of fluidized bed, and the gas from liquid urea washing tower is divdied into two channels, one returning back to crystallizer and used as cold gas and another being directly used to prepare ammonium hydrogen carbonate/sodium carbonate and ammonium chloiride. Its advantages are low cost and high catalytic efficiency.

The invention discloses a carbonization cleaning process of a carbonizer for producing heavy soda ash, particularly aiming at a carbonization cleaning process of an outside cool tower for producing heavy soda ash, characterized by: using marshalling operation, using one tower for cleaning, using the other three towers for producing soda, and washing the towers with an ammonia mother liquor II by turns; sending the ammonia mother liquor II in a cleaning tower, letting a mixed gas of carbon dioxide and nitrogen in the cleaning tower, dissolving sodium bicarbonate and ammonium bicarbonate and other scabs in the tower with the ammonia mother liquor II, and simultaneously reacting ammonia in the ammonia mother liquor II with carbon dioxide to achieve the purposes of carbon dioxide absorption and then precarbonization. According to the invention, because of no need of letting the hot ammonia mother liquor II be subject to cooling and then enter in the soda production tower, the carbonization conversion degree is effectively raised, and the carbonization cleaning process disclosed herein is beneficial for cleaning the carbonizer.

The invention discloses porous zinc oxide nano powder and a preparation method thereof. The method comprises the following steps: firstly, zinc nitrate hexahydrate is dissolved in anhydrous ethanol or deionized water, added with PEG 400 under the condition of magnetic stirring and uniformly mixed; secondly, ammonium bicarbonate is dissolved in the deionized water or the anhydrous ethanol; thirdly, the mol ratio of the zinc nitrate to the ammonium bicarbonate is 1 to 2.5, and a zinc nitrate ethanol solution or a zinc nitrate water solution is dripped into the deionized water and/or an anhydrous ethanol solution of the ammonium bicarbonate, and then precursor is obtained; fourthly, the precursor is washed by an ammonium bicarbonate water solution after centrifugal separation, washed by the anhydrous ethanol, dried, added with n-butylalcohol, uniformly dispersed and then refluxed for 1 to 2 hours at a temperature of between 115 and 120 DEG C, the n-butylalcohol is recovered by vacuum distillation, and the porous zinc oxide nano powder is prepared by utilization of afterheat to dry solid by distillation. The particle diameter of the porous zinc oxide nano powder is between 10 and 250 nanometers; the inside of a nano particle has a porous structure; and the aperture of an inner hole of the particle is between 5 and 120 nanometers.

The invention provides a three-dimensional wrinkle polylactic acid microballoon and a preparation method and uses thereof. The preparation method of the three-dimensional wrinkle polylactic acid microballoons is as follows: adopting ammonium bicarbonate deionized water solution of Fe3O4@ SiO2 nanoparticles as an inner phase, dichloromethane solution of polylactic acid as an interphase, deionized water solution of polyvinyl alcohol as an outer phase, and obtaining the three-dimensional wrinkle polylactic acid microballoons. The gas produced by the ammonium bicarbonate introduces mismatched stresses at emulsion interface, the nanoparticles added in the emulsion introduce multiple-gasification cores, and the three-dimensional wrinkle polylactic acid microballoons are successfully prepared and used in oil water separation and cell adsorption. The three-dimensional wrinkle polylactic acid microballoons are in multi-stage porous structure which can effectively increase specific surface area and can be used effectively in oil-water separation, and has good bio-compatibility which can be used in effective cell adhesion. The three-dimensional wrinkle polylactic acid microballoons have an excellent prospect in bio-application.

The invention discloses porous modified bentonite with foaming effect. The porous modified bentonite is characterized by being prepared from the following raw materials by weight: 85 to 90 parts of calcium bentonite, 1 to 2 parts of octadecyl trimethyl ammonium chloride, 1 to 2 parts of ammonium bicarbonate, 3 to 5 parts of activated carbon powder, 2 to 3 parts of sodium silicate, 0.8 to 1.3 parts of aminopropyltriethoxysilane, 2 to 2.5 parts of carboxymethyl cellulose, 5 to 7 parts of phenolic resin powder, 2 to 3 parts of crushed phoenix tree leaves and 3 to 4 parts of modified diatomite. According to the invention, a formula is reasonable; since bentonite is modified by adding foaming matters like ammonium bicarbonate and activated carbon powder and surfactants like octadecyl trimethyl ammonium chloride, the modified bentonite has porosity, so good adsorption effect is obtained; moreover, through good dispersion of the modified bentonite and the crushed phoenix tree leaves, the porous modified bentonite in the invention is porous and uniform in dispersion and is applicable as a water purification adsorbent, etc.

The invention discloses a calcium citrate producing method includes following steps: (1) contacting a citric acid fermentation clear liquid with heavy calcium carbonate to obtain a crude calcium citrate crystal; (2) acidically hydrolyzing the crude calcium citrate crystal with hydrochloric acid to obtain a solution and filtering the solution; and (3) contacting a filtrate with one or more of a carbonate of alkali metals, a hydroxide of the alkali metals, an oxide of the alkali metals, ammonium carbonate and ammonium bicarbonate. The producing method can obtain the crude calcium citrate crystal precipitation directly through reaction between the simply-filtered impurity-containing crude citric acid fermentation clear liquid and the heavy calcium carbonate and then the high-purity calcium citrate, which is 99.9-99.99% in purity and can reach a standard in United States Pharmacopeia USP33-NF28 and American food additives FCC5, can be obtain just by performing one filtering process for removing impurities and performing a contact reaction between the obtained filtrate and one or more of the carbonate of alkali metals, the hydroxide of the alkali metals, the oxide of the alkali metals, the ammonium carbonate and the ammonium bicarbonate.

The invention discloses a method for preparing lithium manganate by a wet-doping method. By the wet-doping method, manganese chloride solution, ammonium bicarbonate solution and lanthanum nitrate solution are reacted in aqueous solution. Lanthanum hydroxide and manganese carbonate are generated in a coprecipitation way. Manganic manganous oxide-doped crystals are obtained after high-temperature calcination, crushing and grading. Lithium carbonate and the manganic manganous oxide-doped crystals are mixed according to the molar ratio of lithium to manganese, and the molar ratio is 1.15:2. After being mixed effectively and uniformly, the above mixture is put into a kiln to be sintered at a high temperature. After cooling, crushing, grading, sieving and deironing of the sintered materials, spinel-shaped and lanthanum-doped lithium manganate is obtained. The method can combine materials and doping elements tightly. During the high-temperature calcination reaction, the doping elements can be inserted into crystal structures to be doped completely and fused with the doped crystals together. The doping of lanthanum element can raise the average oxidation state of manganese ions, inhibit Jahn-Teller effect effectively, reduce the capacity fading and raise the cycle performance.

The invention relates to a soil ripening regulating agent for a sweet orange garden. The soil ripening regulating agent mainly comprises pine needle soil, domestic sludge, cattle and sheep manure, yeast powder, ammonium bicarbonate, a water-retaining agent and a supersaturated sodium acetate solution. An application method of the soil ripening regulating agent includes mixing the above raw materials except for the supersaturated sodium acetate solution according to a specific ratio, turning the mixture under soil of the garden 5-7 days before sweet orange transplanting, and dumping the supersaturated sodium acetate solution while turning the soil. The soil ripening regulating agent is capable of promoting soil ripening within a short time, high in ripening degree and beneficial to soil tilth improvement and rapid enhancement of fertility, thereby being particularly suitable for soil regulation of the sweet orange garden.