CAS: 13462-86-7; Barite

专利信息

专利号:US-5447706-A
优先权日:1991-03-05
标 题:Direct synthesis of hydrogen peroxide by heterogeneous catalysis, catalyst for the said synthesis and method of preparation of the said catalyst
发明人：VAN WEYNBERGH JACQUES; SCHOEBRECHTS JEAN-PAUL; COLERY JEAN-CLAUDE
权利人:SOLVAY INTEROX
摘要:Method for the direct synthesis of an aqueous solution of hydrogen peroxyde from hydrogen and oxygen by hydrogenous catalysis in a three-phase system in which the hydrogen and oxygen are reacted directly in a gas state, at a pressure above atmospheric pressure, on the surface of a solid hydrogenous catalyst in suspension in a granular state in an aqueous liquid phase, said catalyst consisting of a metal compound selected from pure palladium or an association of palladium with at least one other noble metal, and impregnated on a substrate comprising at least one compound selected from alkaline-earth metal sulfates or phosphates. A catalyst is disclosed for the production of an aqueous liquid phase of hydrogen peroxyde consisting of a metal compound selected from pure palladium or an association of palladium with at least one another noble metal, and impregnated on a substrate comprising at least one compound selected from alkaline-earth metal sulfates or phosphates. A method of preparing the catalyst by precipitation of the palladium or palladium mixture with at least one other noble metal on the granular substrate is also disclosed.

专利号:US-2014264194-A1
优先权日:2013-03-18
标 题:In-Situ Synthesis of Multi-Core Core Electoconductive Powders
发明人：MICHAELS EMILY W; MILLIGAN DEANNA; MORRIS DAVID
权利人:MILLIKEN & CO
摘要:This invention relates to the in-situ synthesis of multi-core electroconductive powders. The multi-core ECPs of the present invention are made using an in-situ synthesis method which eliminates the need for combining mixtures of various types of single-core ECPs in order to achieve the desired end-use product. The multi-core ECPs described herein exhibit very little coloration. They also exhibit low electrical resistivity and contain reduced amounts of antimony.

专利号:US-6403793-B2
优先权日:2000-06-12
标 题 :Intramolecular glycosidation process for the synthesis of (2R, 2-alpha-R, 3a)-2-[1-(3,5- bis (trifluoromethyl) phenyl)ethoxy]-3-(4-fluorophenyl)-1,4-oxazine
发明人：PYE PHILIP J; ROSSEN KAI
权利人:MERCK & CO INC
摘要:The present invention is concerned with novel processes for the preparation of (2R-cis)-2-[[1-[3.5-bis(trifluoromethyl)phenyl]ethenyl]oxy]-3-(4-fluorophenyl)-4-(phenylmethyl) mopholine. This compound is useful as an intermediate in the synthesis of compounds which possess pharmacological activity.

专利号:US-6252092-B1
优先权日:1999-04-30
标 题 :Process for synthesis of 5-alkylbenzodioxoles
发明人：BORZATTA VALERIO; BRANCALEONI DARIO; BATTISTINI CHRISTIAN
权利人:ENDURA SPA
摘要:The following description refers to a new process for the synthesis of 5-alkylated benzo[1,3]dioxole, comprising the following steps in sequence: catalytic hydrogenation of 4-acylphenol; acylation; displacement catalysed by Lewis acids; treatment with an inorganic basic compound and hydrogen peroxide; reaction with alkyl dihalides or dialkoxyalkanes. n The process described herein, which yields 5-alkylbenzo[1,3]dioxoles, is economic and can be easily scaled up to industrial size.

专利号:US-4578485-A
优先权日:1984-02-08
标 题 :Synthesis of spectinomycin analogs by an improved Grignard process
发明人：WHITE DAVID R
权利人:UPJOHN CO
摘要:The invention concerns a method for the synthesis of 6'-ethyl spectinomycin and analogs thereof, including intermediates utilized in the method. The method comprises converting an enamine by a Grignard addition to various novel dienones not hitherto known. The dienones are then hydrogenated and deblocked to obtain 6'-ethyl spectinomycin and analogs thereof. The 6'-ethyl spectinomycin and analogs thereof prepared by the invention exhibit especially good antibacterial activity.

专利号:US-6600040-B2
优先权日:2000-06-08
标 题:Process for the synthesis of (2R, 2-alpha-R, 3A)-2-[1-(3,5-bis(trifluoromethyl)phenyl)ethoxy]-3-(4-fluorophenyl)-1, 4-oxazine
发明人：BRANDS KAREL M JOS; TSAY FUH-RONG; CONRAD KAREN M; ZHAO MATTHEW M
权利人:MERCK & CO INC
摘要:The present invention is concerned with novel processes for the preparation of (2R, 2-alpha-R, 3a)-2-[1-[3,5-bis(trifluoromethyl)phenyl]ethoxy-3-(4-fluorophenyl)-1,4-oxazine. This compound is useful as an intermediate in the synthesis of compounds which possess pharmacological activity.