CAS: 13463-43-9; Ferrous Sulfate Hydrate

专利信息

专利号:US-9174846-B2
优先权日:2009-09-18
标题 :Ferric phosphate and methods of preparation thereof
发明人：BECK LARRY W; SOLTANI MAHROKH; WANG LIYA
权利人:BECK LARRY W; SOLTANI MAHROKH; WANG LIYA; A123 SYSTEMS LLC
摘要:High-purity crystalline ferric phosphate material with desirable characteristics for use in synthesis of nano-sized LFP cathode material are described. The ferric phosphate dihydrate material has as disclosed herein has a molar ratio of phosphorous to iron is from about 1.001 to about 1.05, a surface area of from about 25 m 2 /g to about 65 m 2 /g, and is substantially free of metallic or magnetic impurities. Methods of synthesizing high-purity crystalline ferric phosphate material with desirable characteristics for use in synthesis of nano-sized LFP cathode material are also described. In some embodiments, one or more magnetic traps are used during the reaction process and/or after the formation of the final product to remove magnetic impurities. In some embodiments, a synthetic method of ferric phosphate using multiple steps is described, wherein the intermediate of the synthesis is isolated and purified to improve the purity of the ferric phosphate material. In some embodiments, an iron compound is added to an aqueous solution of phosphoric acid. The solution pH and temperature are controlled to ensure the complete dissolution of the iron compound. The desired iron phosphate crystalline material can be obtained with high purity and high crystalline phase purity by controlling the pH and temperature of the solution.

专利号:US-10961631-B2
优先权日:2016-04-29
标 题:Microwave assisted synthesis of metal oxyhydroxides
发明人：LEONARD KEVIN C; BARFOROUSH JOSEPH M; SEUFERLING TESS E; SONG KELLY R
权利人:UNIV KANSAS
摘要:A method for making a metal oxyhydroxide electrocatalytic material comprises titrating a precursor solution with a (bi)carbonate salt, the precursor solution comprising a first metal salt and a solvent, wherein the titration induces reactions between the (bi)carbonate salt and the first metal salt to provide first metal carbonate species in the titrated precursor solution; and exposing the titrated precursor solution to microwave radiation to decompose the first metal carbonate species to form the metal oxyhydroxide electrocatalytic material and carbon dioxide. Mixed metal oxyhydroxide electrocatalytic materials such as nickel-iron oxyhydroxide may be formed. Also provided are the materials themselves, electrocatalytic systems comprising the materials, and methods of using the materials and systems.

专利号:US-7892520-B2
优先权日:2006-07-31
标 题:Solid-state synthesis of iron oxide nanoparticles
发明人：LU JUN; NG KA MING; YANG SHIHE
权利人:UNIV HONG KONG SCIENCE & TECHN
摘要:The present disclosure includes a method for preparing an aqueous dispersion of γ-Fe 2 O 3 nanoparticles. The method includes grinding an iron (II) hydrated salt, an iron (III) hydrated salt, an inorganic salt, and alkali hydroxide in a grinding or milling machine. The inorganic salt may be a salt matrix that prevents growth and aggregation of the synthesized nanoparticles. The aqueous dispersion of γ-Fe 2 O 3 nanoparticles may optionally be hydrothermally treated to become an aqueous dispersion of α-Fe 2 O 3 nanoparticles. Also disclosed is a method for preparing an mixture of α-Fe 2 O 3 nanoparticles and γ-Fe 2 O 3 nanoparticles, in which at least an iron (III) hydrated salt, an inorganic salt, and alkali hydroxide are ground in a grinding or milling machine. Uses for the nanoparticles include: a magnetic resonance image contrast agent, a color print ink, an artificial tanning pigment, a photocatalyst for degradation of organic dye, a red pigment, an adsorbent for waste water treatment, a catalyst support, and a catalyst.

专利号:US-4866188-A
优先权日:1984-08-03
标 题 :Synthesis of cyclic ethers
发明人：SCHEBEN JOHN A
权利人:NAT DISTILLERS CHEM CORP
摘要:A process is disclosed for preparing a cyclic ether which comprises cyclodehydrating a polyhydroxy compound of the general formula n n HOR.sup.1 HC--R.sup.2 --CHR.sup.3 OH n n in which R 1 and R 3 , each of which is the same or different, is hydrogen or a lower aliphatic, cycloaliphatic or aryl group and R 2 is a divalent aliphatic group of 1 to 10 carbon atoms containing 0, 1 or 2 etheric oxygen atoms or 0, 1 or 2 secondary or tertiary amine nitrogen atoms and 0, 1 or more lower aliphatic, cycloaliphatic and/or aryl groups containing 0 or 1 hydroxyl groups at elevated temperatures in the presence of a catalytically effective amount of a Group VIII metal catalyst or a Group VIII metal-containing material to provide a cyclic ether of the general formula ##STR1## in which R 1 , R 2 and R 3 are as defined above. The process is especially useful for preparing the commercially important cyclic ethers tetrahydrofuran and 1,4-dioxane which are derived from 1,4-butanediol and ethylene glycol and/or diethylene glycol, respectively.

专利号:US-11964260-B2
优先权日:2016-08-08
标题:Method for manufacturing ammonia synthesis catalyst, and method for manufacturing ammonia
发明人：HOSONO HIDEO; KITANO MASAAKI; YOKOYAMA TOSHIHARU; LI JIANG; KAWAMURA SHIGEKI; KISHIDA Kazuhisa
权利人:TOKYO INST TECH; TSUBAME BHB CO LTD
摘要:Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal ammonia synthesis catalyst, in which there are restrictions in terms of producing method and producing facility, and particularly large restrictions for industrial-scale producing, in a more simple manner and so that the obtained catalyst has a high activity. This method for manufacturing an ammonia synthesis catalyst includes: a first step for preparing 12CaO·7Al 2 O 3 having a specific surface area of 5 m 2 /g or above; a second step for supporting a ruthenium compound on the 12CaO·7Al 2 O 3 ; and a third step for performing a reduction process on the 12CaO·7Al 2 O 3 supporting the ruthenium compound, obtained in the second step. This invention is characterized in that the reduction process is performed until the average particle diameter of the ruthenium after the reduction process has increased by at least 15% in relation to the average particle diameter of the ruthenium before the reduction process.

专利号:US-10160710-B2
优先权日:2017-09-20
标 题 :Synthesis method of 3,4-hexanedione
发明人：HE LEI; YUN SHAN; HONG KUN; GUO TAN; ZHU XIUFANG; ZHANG JIADONG; LI HUAJU; WANG CHAOYU; CHEN JING; XU YING
权利人:HUAIYIN INST TECHNOLOGY
摘要:A synthesis method of 3,4-hexanedione comprises a step of 4-hydroxy-3-hexanonen oxidation, and in the step of 4-hydroxy-3-hexanonen oxidation, water is used as a catalyst, acetic acid is used as a cocatalyst, and ozone is used as an oxidizing agent to carry out an oxidation reaction on 4-hydroxy-3-hexanonen, and after the reaction, distillation under reduced pressure is carried out to obtain the 3,4-hexanedione. According to the synthesis method of 3,4-hexanedione in the invention, in the process of 4-hydroxy-3-hexanone oxidation, the 4-hydroxy-3-hexanone is placed in the water, the ozone is used for oxidation on the 4-hydroxy-3-hexanone, and the acetic acid is used as the cocatalyst, so that the entire oxidation reaction process is mild in conditions and simple to operate, no sewage is produced when the final product (3,4-hexanedione) is obtained, and the yield is greatly increased.