CAS: 1341-49-7; Ammonium Hydrogen Difluoride

专利信息

专利号:US-5637285-A
优先权日:1996-01-30
标题 :Process for nitrogen trifluoride synthesis
发明人：CORONELL DANIEL G; HSIUNG THOMAS H-L; WITHERS JR HOWARD P; WOYTEK ANDREW J
权利人:AIR PROD & CHEM
摘要:The present invention is directed to a method for the synthesis of nitrogen trifluoride from elemental fluorine gas and a source of ammonia in a gas-liquid phase reaction comprising; 3 F2+NH4H(x-1)Fx->NF3+(3+x)HFwherein the melt ratio HF/NH3 represented by x in the above formula is at least 2.55 and the reaction liquid is agitated or mixed with a mixing apparatus with power input to the mixing apparatus at a high level equivalent to or greater than 1000 watts per cubic meter. This improved synthesis method allows for enhanced nitrogen trifluoride yields of 70% or greater.

专利号:US-2004175710-A1
优先权日:2001-05-22
标题:Method for in situ, on-chip chemical synthesis
发明人：HAUSHALTER ROBERT C
摘要:Apparatus and methods for the synthesis of arrays of molecules bound to a substrate, and in particular oligomeric molecules such as DNA oligonucleotides and peptides. The methods of the invention comprise providing a substrate having first and second surfaces and a plurality of isolated porous regions extending through the substrate and communicating with the first and second surfaces, contacting selected ones of the porous regions with a reagent, allowing the reagent to bind to or otherwise interact with the selected porous regions, and withdrawing unreacted first reagent from the substrate through the selected porous regions by introducing a pressure differential across the substrate. The events may be repeated as required to form oligomeric molecules.

专利号:US-10100028-B2
优先权日:2013-09-30
标 题:Synthesis routes for prostaglandins and prostaglandin intermediates using metathesis
发明人：YIANNIKOUROS GEORGE PETROS; KALARITIS PANOS; GAMAGE CHAMINDA PRIYAPUSHPA; AREFYEV DENIS VIKTOROVICH
权利人:IRIX PHARMACEUTICALS INC; PATHEON API SERVICES INC
摘要:Methods of synthesizing prostaglandins, prostaglandin analogs and their synthetic intermediates are described. The methods can comprise metal-catalyzed metathesis reactions. Also provided are synthetic intermediates that can be used in the synthesis of the prostaglandins and prostaglandin analogs.

专利号:US-8476471-B2
优先权日:2009-07-13
标 题 :Synthesis of prostanoids
发明人：YIANNIKOUROS GEORGE PETROS; KALARITIS PANOS; GAMAGE CHAMINDA PRIYAPUSHPA; ABERNATHY STEPHANIE BOSSE
权利人:YIANNIKOUROS GEORGE PETROS; KALARITIS PANOS; GAMAGE CHAMINDA PRIYAPUSHPA; ABERNATHY STEPHANIE BOSSE; IRIX PHARMACEUTICALS INC
摘要:The presently disclosed subject matter provides a method of synthesizing prostaglandins and prostaglandin analogs comprising the ring closing metathesis of compounds of Formula (I). Also provided are novel compounds of Formula (I) and Formula (II). In addition to their use as synthetic intermediates in the presently disclosed methods, compounds of Formula (II) can be used as prostaglandin and/or prostaglandin analog prodrugs.

专利号:US-10301185-B2
优先权日:2014-10-15
标 题:Solidothermal synthesis of zeolitic materials and zeolites obtained therefrom
发明人：MAURER STEFAN; Müller Ulrich; XIAO FENG-SHOU; MENG XIANGJU; WU QINMING
权利人:BASF SE
摘要:The present invention relates to a process for the preparation of a zeolitic material comprising YO 2 in its framework structure, wherein Y stands for a tetravalent element, wherein said process comprises the steps of:n (1) providing a mixture comprising one or more sources for YO 2 , one or more fluoride containing compounds, and one or more structure directing agents; (2) crystallizing the mixture obtained in step (1) for obtaining a zeolitic material comprising YO 2 in its framework structure;n nwherein the mixture provided in step (1) and crystallized in step (2) contains 35 wt.-% or less of H 2 O based on 100 wt.-% of YO 2 contained in the mixture provided in step (1) and crystallized in step (2), as well as to a zeolitic material comprising YO 2 in its framework structure obtainable and/or obtained according to said process, and to a zeolitic material per se comprising SiO 2 in its framework structure, wherein in the 29 Si MAS NMR spectrum of the as-synthesized zeolitic material the ratio of the total integration value of the peaks associated to Q3 signals to the total integration value of the peaks associated to Q4 signals is in the range of from 0:100 to 20:80, including the use of the aforementioned zeolitic materials.

专利号:US-10478811-B2
优先权日:2016-11-17
标 题 :Synthesis of MTW framework type zeolites via interzeolite transformation
发明人：ZONES STACEY IAN
权利人:CHEVRON USA INC
摘要:A method is disclosed for synthesizing MTW framework type zeolites via interzeolite transformation in the presence of polyethyleneimine.