CAS: 7681-53-0; Sodium Hypophosphite

专利信息

专利号:US-7332634-B2
优先权日:2002-07-23
标题:Method for the continuous purification by distillation of 1,2-propylene glycol that accumulates during the synthesis of propylene oxide without coupling products
发明人：BASSLER PETER; GOEBBEL HANS-GEORG; TELES JOAQUIM HENRIQUE; RUDOLF PETER
权利人:BASF AG
摘要:The invention relates to a continuously operated process for the purification by distillation of the 1,2-propylene glycol formed as by-product in the synthesis of propylene oxide, wherein the mixture formed in the synthesis which contains the 1,2-propylene glycol is separated in a dividing wall column into low-, intermediate- and high-boiling fractions and the 1,2-propylene glycol is taken off as intermediate boiler at the side offtake of the column.

专利号:US-3956184-A
优先权日:1974-04-24
标题:Method of preparing silver catalyst for synthesis of formaldehyde by oxidizing methyl alcohol
发明人：KRUGLIKOV ANATOLY ABRAMOVICH; YAKOVENKO ZEMFIRA IVANOVNA; ROZNINA MARINA IVANOVNA; ROGACHEVA ANNA MALOFEEVNA; BELOUSOV GERMAN IVANOVICH
权利人:KRUGLIKOV ANATOLY ABRAMOVICH; YAKOVENKO ZEMFIRA IVANOVNA; ROZNINA MARINA IVANOVNA; ROGACHEVA ANNA MALOFEEVNA; BELOUSOV GERMAN IVANOVICH
摘要:The method of preparing a silver catalyst for synthesis of formaldehyde by oxidizing methyl alcohol which consists in that a carrier is impregnated with an aqueous or an aqueous-alcohol solution containing complex ions of silver having the general formula [Ag(X) n ] + or [Ag(Y) 2 ] - , where X is ammonia, ethylenediamine, triethylenetetramine or triaminotriethylamine, Y is a thiocyanate, cyanide, acetate, or hydroxyl ion, and n is 1 or 2. The impregnated carrier is processed, at a temperature of from 10° - 100°C, with a reducing agent taken in the quantity sufficient to reduce the silver completely from said ion. The thus-prepared catalyst is dried at a temperature of from 80° to 400°C. It is recommended that the catalyst be washed with water before drying. The thus-prepared catalyst has a highly developed active surface with a small content of silver (the specific surface of the catalyst is 0.7 - 7 square meters per gram, with the metal silver content of the catalyst being from 5 - 10 per cent by weight). The catalyst is highly active and has good selectivity in the process of formaldehyde synthesis from methyl alcohol. The yield of formaldehyde with the proposed catalyst is from 75 - 80 per cent, calculating with reference to the passed methyl alcohol, with the selectivity of the process being from 89 - 95 per cent.

专利号:WO-9961509-B1
优先权日:1998-05-21
标题:Synthesis of semi-crystalline polyphthalamides through reactive extrusion of hexamethylene terephthalamide oligomer with lower melting, semi-crystalline or amorphous polyamides
发明人：LEBOEUF CHRISTIAN; HARBOURNE DAVID ALAN
权利人:LEBOEUF CHRISTIAN; HARBOURNE DAVID ALAN
摘要:This invention relates to the synthesis of semi-crystalline polyphthalamides (i.e. containing monomeric units of terephthalic acid and hexamethylene diamine) through reactive extrusion of hexamethylene terephthalamide oligomer, or the oligomer of another 6T-rich copolymer, with lower melting semi-crystalline or amorphous polyamides. This process is particularly useful since it is centered around the use of stirred autoclaves for the synthesis of the 6T oligomer and the semi-crystalline or amorphous polyamides which are subsequently combined in a twin screw extruder equipped for devolatilization of water of reaction. It can also be used for the modification of existing semi-crystalline or amorphous polyamides (not necessarily phthalamides) with low levels of 6T.

专利号:US-2024424490-A1
优先权日:2021-01-25
标 题 :Method of synthesis of carbon-supported platinum group metal or metal alloy nanoparticles
发明人：WNUK PAWEL; LEWERA ADAM; JURCZAKOWSKI RAFAL; POWALA FILIP; KOLODZIEJCZYK JAN
权利人:UNIV WARSZAWSKI
摘要:The presented invention relates to a method of synthesis of carbon-supported platinum group metal or metal alloy nanoparticles, which comprises the following steps:n adsorbing on carbon support complexes of a platinum group metal with a urea complexing agent selected from a group comprising urea, urea derivative, a mixture of urea with at least one urea derivative, and a mixture of at least two urea derivatives; and reducing the complexes adsorbed on the carbon support to metal nanoparticles, forming a product of carbon-supported metal nanoparticles. nn The invention also provides the use of the carbon-supported platinum group metal or metal alloy nanoparticles obtained by the method of the invention as catalyst. n The present invention further relates to a method of adsorption of precursors of platinum group metals on the surface of a carbon support and use of complexes of platinum group metals with urea complexing agent for adsorption of platinum group metal precursors on carbon support.

专利号:WO-2023039068-A1
优先权日:2021-09-08
标题:Compositions and methods for synthesis of peptide nucleic acid intermediates
发明人：COULL JAMES M; GILDEA BRIAN D
权利人:NEUBASE THERAPEUTICS INC
摘要:The present disclosure provides intermediates for the synthesis of peptide nucleic acid (PNA) backbones and monomers, such as cyclic intermediates, and methods of making the same.

专利号:US-5146008-A
优先权日:1988-06-16
标 题:Process for the synthesis of aromatic phenyl substituted diols
发明人：GARDANO ANDREA; COASSOLO ALFREDO; CASAGRANDE FRANCESCO; FOA MARCO; CHAPOY LARRY L
权利人:HIMONT ITALIA
摘要:A process for the synthesis of phenyl substituted aromatic diols, obtained by dehydrogenation of the corresponding substituted cyclohexyl derivatives in the presence of a palladium supported catalyst, said palladium supported catalyst being prepared by a process which comprises treating a palladium hydrolysis compound with reducing agents.