10results about "Superphosphates" patented technology

This invention relates to the field of fertilizer production technology, specifically to a segmented ripening preparation process for low-free-acid, high-water-soluble superphosphate; the process includes the following steps: feeding phosphate rock powder into a ball mill for grinding to a particle size ≤120 mesh, preparing 93%±0.5% industrial sulfuric acid; adding phosphate rock powder at a molar ratio of available P2O5 to sulfuric acid of 1:1.05~1:1.07, adding 0.3%~0.5% (by weight of phosphate rock powder) of a modifying agent, and reacting at 65~70℃ for 40~50 minutes. In the later stage of the reaction, low-pressure steam of 0.2 MPa is introduced; staged maturation is carried out, first in a closed chamber at 55~60℃ for 24 hours, and then in a ventilated chamber at 45~50℃ and a wind speed of 0.8~1.0 m / s for 48 hours; granulation and screening are carried out, with the granulation drum rotating at 14~16 r / min and tilted at an angle of 3°~5°; through the above methods, the problems of high free acid, low proportion of water-soluble phosphorus and insufficient production efficiency in traditional processes are solved, and the product quality and production capacity are synergistically improved.

The present invention relates to a thin film photovoltaic unit (100) and a photoelectrochemical module comprising such a photovoltaic unit. The present invention further relates to methods for forming such a photovoltaic unit and such a photoelectrochemical module and to a use of such a module. The photovoltaic unit (100) comprises a transparent substrate (120), at least two photovoltaic cells (111, 112, 1121, 1122), a front contact layer (125), an absorber layer (130) and a back contact layer (135). The photovoltaic unit (100) is divided into a first photovoltaic subunit (111) and a second photovoltaic subunit (112), each of which comprises one or more of the photovoltaic cells that are series connected with each other. In each photovoltaic subunit, the back contact layer (135) comprises a first region (1351) that is electrically connected with the front contact of one of the photovoltaic cells of the respective photovoltaic subunit, and a second region (1352) that serves as a back contact of one of the photovoltaic cells of the respective photovoltaic subunit. The first and the second photovoltaic subunits (111, 112) share a common first region (1351) of the back contact layer (135). A cathode (160) is electrically connected with the first region (1351) of the back contact layer, and an anode (170) is electrically connected with the second region (1352) of the back contact layer (135) within each photovoltaic subunit.

The present invention relates to a thin film photovoltaic unit (100) and a photoelectrochemical module (200) comprising such a photovoltaic unit. The present invention further relates to methods for forming such a photovoltaic unit and such a photoelectrochemical module and to a use of such a module. The photovoltaic unit comprises a transparent substrate (120), at least two photovoltaic cells (1111, 1112, 1121, 1122), a front contact layer (125), an absorber layer (130) and a back contact layer (135). The photovoltaic unit is divided into a first photovoltaic subunit (111) and a second photovoltaic subunit (112), each of which comprises one or more of the photovoltaic cells that are series connected with each other. In each photovoltaic subunit, the back contact layer (135) comprises a first region (1351) that is electrically connected with the front contact (125) of one of the photovoltaic cells of the respective photovoltaic subunit, and a second region (1352) that serves as a back contact of one of the photovoltaic cells of the respective photovoltaic subunit. The first and the second photovoltaic subunits (111, 112) share a common first region (1351) of the back contact layer. A cathode (160) is electrically connected with the first region (1351) of the back contact layer, and an anode (170) is electrically connected with the second region (1352) of the back contact layer within each photovoltaic subunit.

Water-based coating compositions or paint having improved gloss retention, including a latex or water-dispersible polymer, a UV-VIS absorber comprising a substituted benzophenone capable of being a free radical generator, a hindered amine light stabilizer, and optionally a low-VOC coalescent provided in a preferably desired amount. A composition comprising a blend a UV-VIS absorber comprising a substituted benzophenone capable of being a free radical generator, a hindered amine light stabilizer, and a low-VOC coalescent, providing a thermally-stable coalescent that can be used in a paint formulation for gloss retention. Gloss retention of paints containing the UV-VIS absorber and hindered amine light stabilizer being markedly improved over paints that do not have both components present.

The application discloses a method for removing fluorine from white fertilizer by dry method and preparing fluorosilicic acid, which comprises the following steps: adding dried white fertilizer into a reaction container, mixing the white fertilizer with silicon powder and sulfuric acid under stirring, wherein the mixing ratio is that the molar ratio of SiO2 / F is 0.3-0.8 and the molar ratio of H2SO4 / F is 1-4; then conveying the mixed material to a calcining furnace for calcination; introducing fluorine-containing gas discharged from the calcining into a fluorosilicic acid preparation system, and obtaining fluorosilicic acid products with a purity of greater than or equal to 12 % through two-stage spray absorption; and continuing to use the fluorine-removing calcined slag as white fertilizer. The application can significantly improve the fluorine resource utilization rate and reduce resource waste; meanwhile, by adding sulfuric acid which has the dual functions of raw material and catalyst, the reaction temperature is effectively reduced, the energy consumption and equipment cost are reduced, and the reaction efficiency and process economy are further improved.

The application discloses a kind of to improve the compound medicament of hazel resistance to cold and preparation method thereof, belong to the technical field of cold resistance protective agent.The application utilizes polyvinyl alcohol, abscisic acid, light calcium carbonate, superphosphate, potassium sulfate, ethanol and water to prepare the compound medicament for improving the resistance to cold of hazel, with the help of polyvinyl alcohol and light calcium carbonate to build protective film, to reduce water loss;Abscisic acid is used to regulate the stress hormone level in hazel body, to enhance the stability of cell wall structure;By superphosphate and potassium sulfate, phosphorus and potassium elements are supplemented, the activity of cold resistance related enzyme is promoted, and the improvement of hazel resistance to cold is realized by the synergistic effect of multiple components.

The application discloses a kind of composite soil improver, including the following weight parts of components: superphosphate 30~40 parts, powder humic acid 20~25 parts, yellow humic acid metal complex 20~25 parts, jarosite 10~25 parts and lignosulfonate 5~8 parts.The application also provides a kind of preparation method of composite soil improver and its application.The application provides a kind of composite soil improver and its preparation method and application, introduce jarosite as potassium fertilizer slow-release carrier, add lignosulfonate as bonding and dispersion medium, the composite soil improver can realize the sustained release of potassium ion, simultaneously, the mineral skeleton that it releases potassium and remains is cemented with calcium ion and organic matter in soil, jointly promote the formation of water-stable aggregate structure, to realize the synergic improvement of potassium slow-release supply and soil structure construction.