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公开(公告)号:US5962728A
公开(公告)日:1999-10-05
申请号:US961800
申请日:1997-10-31
IPC分类号: C07C263/20 , C07C265/14 , C07C263/18
CPC分类号: C07C263/20 , C07C2101/14
摘要: The present invention relates to a process for isolating aliphatic isocyanate monomer(s) from a liquid or viscous paste composition comprising polymeric isocyanate residues and the aliphatic isocyanate monomer(s), and for isolating solid polymeric isocyanate residue from said composition. Also disclosed is the aliphatic isocyanate monomer(s) and the solid polymeric isocyanate byproduct produced by this process.
摘要翻译: 本发明涉及一种从包含聚合异氰酸酯残基和脂族异氰酸酯单体的液体或粘性糊组合物中分离脂族异氰酸酯单体并用于从所述组合物中分离固体聚异氰酸酯残基的方法。 还公开了通过该方法生产的脂族异氰酸酯单体和固体聚合异氰酸酯副产物。
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公开(公告)号:US5002880A
公开(公告)日:1991-03-26
申请号:US461721
申请日:1990-01-08
申请人: Robert W. Mason
发明人: Robert W. Mason
IPC分类号: C12P13/00
摘要: The present invention relates to a process for making an isocyanate which comprises the steps of: (a) reacting an amine with dimethyl carbonate in the presence of a hydrolase enzyme catalyst, preferably at a temperature not exceeding 50.degree. C. to form a methyl urethane, and (b) subjecting said methyl urethane to an elevated temperature in order to thermally cleave the urethane to produce an isocyanate.
摘要翻译: 本发明涉及一种制备异氰酸酯的方法,其包括以下步骤:(a)在水解酶催化剂存在下,优选在不超过50℃的温度下使胺与碳酸二甲酯反应,形成甲基氨基甲酸酯 ,和(b)使所述甲基氨基甲酸酯经受高温以热裂解聚氨酯以产生异氰酸酯。
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公开(公告)号:US3969487A
公开(公告)日:1976-07-13
申请号:US279696
申请日:1963-04-26
申请人: Thomas E. Austin , Robert W. Mason
发明人: Thomas E. Austin , Robert W. Mason
CPC分类号: C01B21/09
摘要: A process for making chlorodifluoroamine by introducing a mixture of an inert gas and elemental fluorine into a reaction zone containing a mixture or alkali metal azide and alkali metal chloride at a reaction temperature not substantially above 50.degree.C.
摘要翻译: 在不超过50℃的反应温度下,通过将惰性气体和元素氟的混合物引入到含有混合物或碱金属叠氮化物和碱金属氯化物的反应区中来制备氯二氟胺的方法。
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公开(公告)号:US08076526B2
公开(公告)日:2011-12-13
申请号:US12383904
申请日:2009-03-30
申请人: Robert W. Mason
发明人: Robert W. Mason
IPC分类号: C07C7/08
CPC分类号: C07B63/00
摘要: A process for isolating a conjugated diene from a hydrocarbon mixture is disclosed. The process comprises distilling the hydrocarbon mixture in the presence of an extraction solvent comprising an N,N-dialkyl aliphatic amide and from 12 to 50 weight percent furfural to separate a distillate and a conjugated diene-rich extract; and recovering the conjugated diene from the extract.
摘要翻译: 公开了一种从烃混合物中分离共轭二烯的方法。 该方法包括在包含N,N-二烷基脂族酰胺和12至50重量%糠醛的萃取溶剂的存在下蒸馏烃混合物以分离馏出物和富含共轭二烯的提取物; 并从提取物中回收共轭二烯。
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公开(公告)号:US5488187A
公开(公告)日:1996-01-30
申请号:US290575
申请日:1994-08-15
申请人: Robert W. Mason
发明人: Robert W. Mason
IPC分类号: C07C201/08 , C07C201/16 , C07C205/06
CPC分类号: C07C201/08 , C07C201/16
摘要: Aromatic nitration reactions and, more specifically, a process for nitrating benzene to produce dinitrobenzene or mononitrobenzene in the absence of sulfuric acid and in the absence of any dipolar aprotic solvent.
摘要翻译: 更具体地说,是在不存在硫酸的情况下和在不存在任何偶极非质子溶剂的情况下硝化苯以产生二硝基苯或单硝基苯的方法。
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公开(公告)号:US20110014372A1
公开(公告)日:2011-01-20
申请号:US12460227
申请日:2009-07-15
摘要: A method for passivating at least part of the feed conducting conduit of a pyrolysis furnace to reduce the deposition of coke in that conduit, the passivation being accomplished by employing at least one phosphorous containing compound.
摘要翻译: 一种用于钝化热解炉的至少部分进料导管的方法,以减少该导管中的焦炭沉积,该钝化是通过使用至少一种含磷化合物来实现的。
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公开(公告)号:US5354924A
公开(公告)日:1994-10-11
申请号:US108035
申请日:1993-08-17
申请人: Robert W. Mason
发明人: Robert W. Mason
IPC分类号: C07C201/08 , C07C201/16 , C07C205/06 , C07C205/11
CPC分类号: C07C201/16 , C07C201/08
摘要: Aromatic nitration reactions and, more specifically, a process for nitrating toluene to produce dinitrotoluene in the absence of any dipolar aprotic solvent.
摘要翻译: 芳香族硝化反应,更具体地说,在不存在任何偶极非质子溶剂的情况下硝化甲苯以产生二硝基甲苯的方法。
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公开(公告)号:US5001272A
公开(公告)日:1991-03-19
申请号:US402322
申请日:1989-09-05
申请人: Robert W. Mason
发明人: Robert W. Mason
IPC分类号: C07C201/16 , C07C205/06
CPC分类号: C07C201/08 , C07C201/16
摘要: Aromatic nitration reactions and, more specifically, a process for nitrating toluene to dinitrotoluene. The process involves a liquid phase nitration reaction of anhydrous nitric acid and toluene in a molar ratio of between about 5:1 and about 9:1 of nitric acid to toluene in a reactor at a reaction temperature of between about 40.degree. C. and about 70.degree. C., in the absence of sulfuric acid and in the absence of any dipolar organic solvent, to produce a mixture containing dinitrotoluene, and isolating said dinitrotoluene by contacting said mixture with a phase separating effective amount of an alkali or alkaine earth metal nitrate salt to cause phase separation of said dinitrotoluene.
摘要翻译: 芳香硝化反应,更具体地说,是将甲苯硝化成二硝基甲苯的方法。 该方法包括在反应器中在约40℃至约约40℃的反应温度下,反应器中无水硝酸和甲苯以约5:1至约9:1的硝酸与甲苯的摩尔比进行液相硝化反应 在不存在硫酸的情况下,在不存在任何偶极有机溶剂的情况下,制备含有二硝基甲苯的混合物,并通过使所述混合物与相分离有效量的碱金属或碱土金属的硝酸盐相分离来分离所述二硝基甲苯 盐引起所述二硝基甲苯的相分离。
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公开(公告)号:US4804792A
公开(公告)日:1989-02-14
申请号:US149258
申请日:1988-01-28
申请人: Robert W. Mason , R. K. Steely
发明人: Robert W. Mason , R. K. Steely
IPC分类号: C07C205/06 , C07C79/10
CPC分类号: C07C201/08
摘要: Nitration of benzene or toluene, and more specifically to such a reaction in a molten nitrate salt medium.
摘要翻译: 苯或甲苯的硝化,更具体地说是在硝酸盐硝酸盐介质中的这种反应。
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公开(公告)号:US20100243424A1
公开(公告)日:2010-09-30
申请号:US12383904
申请日:2009-03-30
申请人: Robert W. Mason
发明人: Robert W. Mason
IPC分类号: B01D3/40
CPC分类号: C07B63/00
摘要: A process for isolating a conjugated diene from a hydrocarbon mixture is disclosed. The process comprises distilling the hydrocarbon mixture in the presence of an extraction solvent comprising an N,N-dialkyl aliphatic amide and from 12 to 50 weight percent furfural to separate a distillate and a conjugated diene-rich extract; and recovering the conjugated diene from the extract.
摘要翻译: 公开了一种从烃混合物中分离共轭二烯的方法。 该方法包括在包含N,N-二烷基脂族酰胺和12至50重量%糠醛的萃取溶剂的存在下蒸馏烃混合物以分离馏出物和富含共轭二烯的提取物; 并从提取物中回收共轭二烯。
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