Processes Of Obtaining Nicotinamide Per Se Patents (Class 546/317)
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Patent number: 10112889Abstract: The invention relates to a continuous method for producing a tenside, containing a compound of the formula (1), wherein R2 is a fatty acid alkyl residue and R1 is a linear or branched C1 to C12 hydrocarbon residue, and x is in the range from 1 to 15 by conversion of fatty acid alkyl esters or fatty acid triglycerides having an N-n-alkylized polyhydroxy compound in the presence of an alkali catalyst or a catalyst selected from hydroxides or alcoholates of the 2nd and 4th secondary group of the periodic system at a temperature in the range from 40 to 300° C.Type: GrantFiled: November 9, 2015Date of Patent: October 30, 2018Assignee: CLARIANT INTERNATIONAL LTD.Inventors: Jörg Appel, Dennis Heitmann, Sarah Werner
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Patent number: 9074508Abstract: The present invention relates to an exhaust-gas purification device by means of which combustion exhaust gases emerging from combustion devices, in particular diesel engines, can be purified. At least a regeneration of the soot particle filter and/or the NOx catalytic converter can be attained by means of the exhaust-gas purification device.Type: GrantFiled: September 30, 2011Date of Patent: July 7, 2015Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Robert Szolak, Alexander Susdorf, Thomas Aicher
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Publication number: 20150126734Abstract: The present disclosure relates to a single pot process for preparation of a N,N-di substituted carboxamide compounds of formula (I), said process comprising: reacting a carboxylic acid with a di-substituted carbamoyl chloride in presence of an organic tertiary base to obtain the N,N-di substituted carboxamide compounds of formula (I). The process of the present disclosure involves a simple step, and it is energy and time saving process for preparation of N,N-di substituted carboxamides.Type: ApplicationFiled: December 20, 2011Publication date: May 7, 2015Applicant: DIRECTOR GENERAL, DEFENCE RESEARCH & DEVELOPMENT ORGNISATIONInventors: Ambati Narasimha Rao, Kumaran Ganesan, Rajagopalan Vijayaraghavan
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Patent number: 8952170Abstract: An improved catalytic process for the production of pyridine carboxylic acid amides, by catalytic hydration reaction of pyridine nitriles with solid heterogeneous catalyst wherein the process involve effective utilization and recycling of the catalytic components, and reactants.Type: GrantFiled: April 14, 2012Date of Patent: February 10, 2015Assignee: Jubilant Life Sciences, Ltd.Inventors: Mahendra Kumar, Shailendra Kumar Singh, Ashutosh Agarwal
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Publication number: 20140081029Abstract: An improved catalytic process for the production of pyridine carboxylic acid amides, by catalytic hydration reaction of pyridine nitriles with solid heterogeneous catalyst wherein the process involve effective utilization and recycling of the catalytic components, and reactants.Type: ApplicationFiled: April 14, 2012Publication date: March 20, 2014Inventors: Mahendra Kumar, Shailendra Kumar Singh, Ashutosh Agarwal
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Patent number: 8575204Abstract: Compounds of formula (I): are inhibitors of p38 kinase and are useful in the treatment of conditions or disease states mediated by p38 kinase activity or mediated by cytokines produced by the activity of p38.Type: GrantFiled: February 26, 2010Date of Patent: November 5, 2013Assignee: GlaxoSmithKline LLCInventors: Nicola Mary Aston, Paul Bamborough, Ann Louise Walker
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Publication number: 20130123505Abstract: A carboxamide can be produced in a high yield by a method for producing a carboxamide, for example, represented by formula (4): (wherein R1 and R3 are as defined below), the method comprising a step of allowing a carboxylic acid ester represented by formula (1): (wherein R1 represents an optionally substituented C1-C20 hydrocarbon group or an optionally substituented C3-C20 heterocyclic group, and R2 represents an optionally substituented C1-C20 hydrocarbon group), an amine represented by formula (2): R3—NH2 ??(2) (wherein R3 represents a hydrogen atom or an optionally substituented C1-C20 hydrocarbon group), and a formamide compound represented by formula (3): (wherein R3 is as defined above) to react in the presence of a metal alkoxide.Type: ApplicationFiled: July 13, 2011Publication date: May 16, 2013Inventors: Junichi Tomokawa, Takahiro Kimura, Norihiko Hirata
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Publication number: 20120022262Abstract: The present invention relates to a process for the hydrolysis of nitriles of the formulae and respectively of amides of the formulae in which R is in each case hydrogen or C1-20-alkyl, to give the corresponding amides and/or acids and respectively to give the corresponding acids.Type: ApplicationFiled: April 21, 2008Publication date: January 26, 2012Inventors: Lothar Ott, Andreas Heyl, Norbert Clausen, Gregor Michalik, Herbert Vogel
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Patent number: 8084476Abstract: This invention provides a compound of the formula (I): wherein X represents a carbon atom or the like: Y represents imino, or the like: R1 represents an alkyl group having from 1 to 6 carbon atoms or the like: R2 and R3 independently represents a hydrogen atom or the like. These compounds are useful for the treatment of disease conditions mediated by prostaglandin such as pain, or the like in mammalian. This invention also provides a pharmaceutical composition comprising the above compound.Type: GrantFiled: February 10, 2009Date of Patent: December 27, 2011Assignee: Raqualia Pharma Inc.Inventors: Hiroki Koike, Kana Kon-i, Yukari Matsumoto, Kazunari Nakao, Yoshiyuki Okumura, Tatsuya Yamagishi
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Publication number: 20100190992Abstract: Nicotinamide compounds of the formula (1) and processes for the preparation thereof are described.Type: ApplicationFiled: May 28, 2008Publication date: July 29, 2010Applicant: BAYER CROPSCIENCE AGInventors: Sergii Pazenok, Uwe Stelzer, Harry Blaschke, Arnd Neeff, Lubbertus Mulder
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Patent number: 7709506Abstract: Compounds of formula (I): are inhibitors of p38 kinase and are useful in the treatment of conditions or disease states mediated by p38 kinase activity or mediated by cytokines produced by the activity of p38.Type: GrantFiled: August 7, 2006Date of Patent: May 4, 2010Assignee: GlaxoSmithkline LLCInventors: Nicola Mary Aston, Paul Bamborough, Ann Louise Walker
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Patent number: 7456291Abstract: Use of a combination of two vitamin compounds, i.e. riboflavin (also known as vitamin B2) and nicotinic acid (also referred to as niacin) or, as an alternative thereto, the corresponding amide, i.e. niacinamide or nicotinamide (also known as vitamin PP) for the treatment of various forms of primary headache, such as classical migraine or migraine with an aura, common migraine or migraine without an aura, complicated migraine and cluster headache or histamine headache. The invention also concerns compositions for the treatment of primary headaches which are based on the two aforesaid active ingredients.Type: GrantFiled: July 20, 2001Date of Patent: November 25, 2008Inventor: Giampiero Valletta
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Patent number: 7378412Abstract: Compounds or their salts having general formula: A-B—C—NO2 wherein: A is a drug radical; B is a linker; and C is a bivalent radical.Type: GrantFiled: December 30, 2004Date of Patent: May 27, 2008Assignee: Nicox S.A.Inventor: Piero Del Soldato
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Patent number: 7345176Abstract: The present invention relates to an improved process for conversion of cyanopyridines to nicotinamides. More particularly the present invention relates to preparation of nicotinamides and isonicotinamides which finds its usage in the preparation of anti-TB drug i.e. isoniazid and as an intermediate of vitamin B12. The present invention also relates to a process for a catalyst useful for the preparation of nicotinamide and isonicotinamide.Type: GrantFiled: May 9, 2005Date of Patent: March 18, 2008Assignee: Council of Scientific and Industrial ResearchInventors: Subhash Chandra Ray, Baldev Singh, Hiralal Prasad, Prodyot Kumar Sarkar, Pashupati Dutta, Shyam Kishore Roy, Anup Kumar Bandyopadhyay, Raja Sen
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Patent number: 7317105Abstract: The invention relates to a method for producing 4-haloalkylnicotinamides having the formula (I): wherein R1 is (C1-C4)haloalky, comprising subjecting one or more 3-((C1-C4)haloalkyl-3-oxo-1-alkenylamino)nitriles of the formula (II), (III) or (IV): R1—C(O)—CH?CH—NH—CH?CH—CN??(II) R1—C(O)—CH?CH—NH—CH(ZR2)—CH2—CN??(III) R1—C(O)—CH?CH—NH—CH(Hal)—CH2—CN??(IV) where R1 is as defined above, R2 is the same or different and is (C1-C6)-alkyl and Z is the same or different and is O, S or NR1, to a ring-closing reaction and simultaneous hydrolysis in the presence of a strong acid.Type: GrantFiled: May 9, 2003Date of Patent: January 8, 2008Assignee: Bayer Cropscience AGInventor: Sergiy Pazenok
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Patent number: 7297796Abstract: Novel sulfamoyl benzamide compounds, pharmaceutical compositions containing the sulfamoyl benzamide compounds, and methods of their pharmaceutical use are disclosed. In certain embodiments, the sulfamoyl benzamide compounds are agonists and/or modulating ligands of cannabinoid receptors and may be useful, inter alia, for treating and/or preventing pain, gastrointestinal disorders, inflammation, auto-immune diseases, ischemic conditions, immune-related disorders, hypertension, neurological disorders, and neurodegenerative diseases, for providing cardioprotection against ischemic and reperfusion effects, for inducing apoptosis in malignant cells, for inhibiting mechanical hyperalgesia associated with nerve injury, and as an appetite stimulant.Type: GrantFiled: October 13, 2005Date of Patent: November 20, 2007Assignee: Adolor CorporationInventors: Roland E. Dolle, Karin Worm, Q. Jean Zhou
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Patent number: 7288658Abstract: The present invention relates to a process for the manufacture of compounds of formula wherein the substituents are as described herein which comprises the steps of a) reacting a compound of formula with a compound of formula to form a compound of formula b) converting the OH/?O function of compounds of formula XIV/XIVa into a leaving group P with a reagent containing a leaving group, selected from POCl3, PBr3, MeI and (F3CSO2)2O to form a compound of formula wherein P is halogen or trifluoromethanesulfonate; c) substituting R2 for the leaving group P by reacting compound XV with HR2 to form a compound of formula and d) hydrolyzing the nitrile function in an acidic medium selected from H2SO4, HCl and acetic acid, to form a compound of formula I The compounds of formula I are valuable intermediates for the manufacture of therapeutically active compounds which have NK-1 antagonist activity.Type: GrantFiled: July 9, 2004Date of Patent: October 30, 2007Assignee: Hoffmann-La Roche Inc.Inventors: Wolfgang Goehring, Peter John Harrington, Lewis M Hodges, David A Johnston, Goesta Rimmler
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Patent number: 7125898Abstract: Compounds of formula (I): are inhibitors of p38 kinase and are useful in the treatment of conditions or disease states mediated by p38 kinase activity or mediated by cytokines produced by the activity of p38.Type: GrantFiled: February 10, 2003Date of Patent: October 24, 2006Assignee: SmithKline Beecham CorporationInventors: Nicola Mary Aston, Paul Bamborough, Ann Louise Walker
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Patent number: 7122539Abstract: Nitric acid salts with medicines active in the respiratory system pathology treatment.Type: GrantFiled: December 17, 2003Date of Patent: October 17, 2006Assignee: Nicox S.A.Inventor: Piero Del Soldato
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Publication number: 20040186297Abstract: The present invention relates to an improved process for conversion of cyanopyridines to nicotinamides More particularly the present invention relates to preparation of nicotinamides and isonicotinamides which finds its usage in the preparation of anti-TB drug i.e. isoniazid and as an intermediate of vitamin B12. The present invention also relates to a process for a catalyst useful for the preparation of nicotinamide and isonicotinamide.Type: ApplicationFiled: March 20, 2003Publication date: September 23, 2004Inventors: Subhash Chandra Ray, Baldev Singh, Hiralal Prasad, Prodyot Kumar Sarkar, Pashupati Dutta, Shyam Kishore Roy, Anup Kumar Bandyopadhyay, Raja Sen
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Publication number: 20040138270Abstract: The present invention describes compounds of the general formula I 1Type: ApplicationFiled: December 10, 2003Publication date: July 15, 2004Inventors: Georg Fertig, Frank Herting, Matthias Koerner, Manfred Kubbies, Anja Limberg, Ulrike Reiff, Michael Weidner
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Patent number: 6566403Abstract: This invention relates to new compositions comprising predominantly one enantiomer of an N-acetonylbenzamide fungicide, methods of preparing N-acetonylbenzamides, and their use as fungicides.Type: GrantFiled: June 16, 1997Date of Patent: May 20, 2003Assignee: Dow AgroSciences LLCInventors: Enrique Luis Michelotti, David Hamilton Young, Thomas Anthony McLaughlin
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Patent number: 6380218Abstract: A compound of formula (I) wherein m, n, o, p, q, r, A, B, D, E, R1, R2,R3, R4, R5, R6, R7 and R8 are as defined in the description, useful in the treatment of respiratory, allergic, rheumatoid, body weight regulation, inflammatory and central nervous system disorders such as asthma, chronic obstructive pulmonary disease, adult respiratory diseases syndrome, shock, fibrosis, pulmonary hypersensitivity, allergic rhinitis, atopic dermatitis, psoriasis, weight control, rheumatoid arthritis, cachexia, crohn's disease, ulcerative colitis, arthritic conditions and other inflammatory diseases, depression, multi-infarct dementia and AIDS.Type: GrantFiled: May 27, 1999Date of Patent: April 30, 2002Assignee: Pfizer IncInventors: Anthony Marfat, Robert J. Chambers, John W. Watson, John B. Cheng, Allen J. Duplantier, Edward F. Kleinman
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Patent number: 6271372Abstract: A process for the preparation of arylamides of heteroaromatic carboxylic acids of the formula: in which each An is nitrogen or CRn(n=1 to 5), with the proviso that at least one of the ring members is nitrogen and that two nitrogen atoms are not bonded directly to one another; R1 to R5, if present, independently of one another are hydrogen, C1-4-alkyl or aryl, one of the substituents R1 to R5 being a group of the formula —OR, in which R is an optionally substituted aromatic or heteroaromatic radical; R6 is hydrogen or C1-4-alkyl; and R7 is an optionally substituted aromatic or heteroaromatic radical. The amides are obtained from the corresponding heteroaromatic halogen compounds, the corresponding aromatic amines and carbon monoxide in the presence of a palladium phosphine complex. Compounds of this class are important herbicides.Type: GrantFiled: January 29, 1999Date of Patent: August 7, 2001Assignee: Lonza AGInventors: Jean-Paul Roduit, Georges Kalbermatten
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Patent number: 6251827Abstract: Acylsulfamoylbenzamides of the formula I and crop protection compositions comprising them are described. In this formula I, R1, R2, R3, R4 and R5 are various organic radicals and X is CH or N.Type: GrantFiled: September 25, 1998Date of Patent: June 26, 2001Assignee: Hoechst Schering AgrEvo GmbHInventors: Frank Ziemer, Lothar Willms, Thomas Auler, Hermann Bieringer, Christopher Rosinger
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Patent number: 6218543Abstract: Described are processes for the large, commercial scale production of USP grade nicotinamide, wherein the USP grade product is isolated using novel strategies which minimize product waste, and avoid the need for crystallizations and/or ameliorate complications arising in crystallization strategies. Preferred processes involve the processing of nicotinamide reaction crudes over both cation exchange and weak base resins and the subsequent recovery of USP grade nicotinamide by simple evaporation.Type: GrantFiled: July 21, 1999Date of Patent: April 17, 2001Inventors: Martin Grendze, Susan L. Vorhies
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Patent number: 6133478Abstract: A platinum complex useful as a catalyst for converting nitrites into amides comprises a platinum complex of dialkyl phosphine of stoichiometric formula: PtX(R.sub.2 POHOPR.sub.2)(PR.sub.2 OH) where R is an alkyl, alicyclic, chiral, alkylaryl group or substituted alkyl, alicyclic, chiral, alkaryl group or the two R groups attached to one phosphorous atom can form a heterocyclic ring with the phosphorous atom and X is H or a halide. The conversion takes place under reflux conditions to give a high yield of the amide.Type: GrantFiled: June 7, 1999Date of Patent: October 17, 2000Inventors: Adrian W Parkins, Talit Ghaffar
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Patent number: 5900484Abstract: A process for the preparation of arylamides of heteroaromatic carboxylic acids of the formula: ##STR1## in which each A.sup.n is nitrogen or CR.sup.n (n=1 to 5), with the proviso that at least one of the ring members is nitrogen and that two nitrogen atoms are not bonded directly to one another; R.sup.1 to R.sup.5, if present, independently of one another are hydrogen, C.sub.1-4 -alkyl or aryl, one of the substituents R.sup.1 to R.sup.5 being a group of the formula --OR, in which R is an optionally substituted aromatic or heteroaromatic radical; R.sup.6 is hydrogen or C.sub.1-4 -alkyl; and R.sup.7 is an optionally substituted aromatic or heteroaromatic radical. The amides are obtained from the corresponding heteroaromatic halogen compounds, the corresponding aromatic amines and carbon monoxide in the presence of a palladium phosphine complex. Compounds of this class are important herbicides.Type: GrantFiled: September 10, 1997Date of Patent: May 4, 1999Assignee: Lonza AGInventors: Jean-Paul Roduit, Georges Kalbermatten
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Patent number: 5863950Abstract: HIV protease inhibitors, obtainable by chemical synthesis, block the biological activity of the HIV protease enzyme, causing the replication of the HIV virus to terminate. These compounds, as well as pharmaceutical compositions that contain these compounds and possibly other anti-viral agents as ingredients, are thus suitable for the treatment of the HIV virus known to cause AIDS.Type: GrantFiled: October 27, 1994Date of Patent: January 26, 1999Assignee: Agouron Pharmaceuticals, Inc.Inventors: Siegfried H. Reich, Kathleen Lewis, Michael Melnick, Mary Ann M. Fuhry, Stephen Warren Kaldor
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Patent number: 5763614Abstract: 1,4-dihydropyridine derivatives and optically active 1,4-dihydropyridine derivatives with the following formula, having vasodilating activity based on calcium antagonism, and PAF antagonism, and methods of producing the same are disclosed: ##STR1## wherein (*) indicates a chiral center in the case of the optically active 1,4-dihydropyridine derivatives.Type: GrantFiled: June 10, 1994Date of Patent: June 9, 1998Assignee: Fujirebio Inc.Inventors: Hiroshi Ikawa, Akiyoshi Kadoiri, Yasuko Konagai, Tetsuaki Yamaura, Noriko Kase
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Patent number: 5756750Abstract: Described are preferred processes for hydrolyzing substituted and unsubstituted cyanopyridines in the presence of a base and under substantially adiabatic conditions to produce pyridine substituted amides and/or pyridine substituted carboxylic acids. Preferred processes can be conducted in a variety of continuous reactors including cascades of reaction vessels, loop reactors or flow tube reactors. More preferred are the efficient and advantageous preparations of nicotinamide and niacin, which serve as important members of the B-vitamin complex.Type: GrantFiled: February 7, 1997Date of Patent: May 26, 1998Assignee: Reilly Industries, Inc.Inventors: Wei Cao, Robert A. Kattau, George Kreilis
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Patent number: 5714518Abstract: HIV protease inhibitors, obtainable by chemical synthesis, block the biological activity of the HIV protease enzyme, causing the replication of the HIV virus to terminate. These compounds, as well as pharmaceutical compositions that contain these compounds and possibly other anti-vital agents as ingredients, are thus suitable for the treatment of the HIV virus known to cause AIDS.Type: GrantFiled: October 27, 1994Date of Patent: February 3, 1998Assignee: Agouron PharmaceuticalsInventors: Siegfried H. Reich, Mark J. Pino, Dzuy T. Nguyen, Anthony J. Trippe
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Patent number: 5614636Abstract: A process for the preparation of carboxamides of nitrogen-containing aromatic heterocyclic compounds from the corresponding N-heterocyclic compounds by reaction thereof with formamide in the presence of peroxodisulfuric acid or a peroxodisulfate.Type: GrantFiled: May 27, 1994Date of Patent: March 25, 1997Assignee: Lonza Ltd.Inventors: Jean-Paul Roduit, Alain Wellig, Karin Amacker, Martin Eyer
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Patent number: 5206372Abstract: Certain 2-chloropyridine derivatives, which are useful as starting materials for the preparation of various herbicides and fungicides, are prepared by cyclization of 1,3-butadiene derivatives in the presence of hydrogen chloride.Type: GrantFiled: May 29, 1991Date of Patent: April 27, 1993Assignee: Shell Research LimitedInventor: Ludwig Schroder
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Patent number: 5142057Abstract: A process for producing a carboxylic acid amide or ester, which comprises reacting an organic chloride having at least one chlorine atom on its ring of a substituted or unsubstituted, aromatic or heterocyclic hydrocarbon with carbon monoxide and an amine or an alcohol in the presence of a base by using as catalysts a palladium compound and a phosphine compound represented by the general formula (V):(R).sub.2 P--X--P(R).sub.2 (V)wherein R is an alkyl group or a substituted or unsubstituted phenyl group, and X is an alkylene group having 1 to 6 carbon atoms ##STR1## or a binaphthyl group.Type: GrantFiled: May 29, 1990Date of Patent: August 25, 1992Assignee: Nihon Nohyaku Co., Ltd.Inventors: Keiji Suto, Masaaki Kudo, Moriharu Yamamoto
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Patent number: 5107057Abstract: This invention relates to certain cyano-dienes and halopyridines and the processes for their preparation from a protected 1,3-dialdehyde and a cyano-diene.Type: GrantFiled: June 12, 1990Date of Patent: April 21, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: George C. Chiang, Felix E. Granchelli, Christopher Wright
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Patent number: 5008276Abstract: Fungicidal compounds of the formula (I): ##STR1## and stereoisomers thereof, wherein K is oxygen or sulphur; Z is optionally substituted aryl or optionally substituted heteroaryl; X is O, S(O).sub.n, NR.sup.4, CR.sup.1 R.sup.2, CHR.sup.5, CO, CR.sup.1 (OR.sup.2), C.dbd.CR.sup.1 R.sup.2, CHR.sup.1 CHR.sup.2, CR.sup.1 .dbd.CR.sup.2, CHR.sup.1 CR.sup.2 .dbd.CH, C.dbd.C, OCHR.sup.1, CHR.sup.1 O, OCHR.sup.1 O, S(O).sub.n CHR.sup.1, S(O).sub.n CHR.sup.1 O, CHR.sup.1 S(O).sub.n, CHR.sup.1 OSO.sub.2, NR.sup.4 CHR.sup.1, CHR.sup.1 NR.sup.4, CO.sub.2, O.sub.2 C, SO.sub.2 O, OSO.sub.2, CO.CO, COCHR.sup.1, COCHR.sup.1 O, CHR.sup.1 CO, CHOH.CHR.sup.1, CHR.sup.1.CHOH, ##STR2## CONR.sup.4, OCONR.sup.4, NR.sup.4 CO, CSNR.sup.4, OCS.NR.sup.4, SCO.NR.sup.4, NR.sup.4 CO.sub.2, NR.sup.4 CS, NR.sup.4 CSO, NR.sup.4 COS, NR.sup.4 CONR.sup.4, S(O).sub.n NR.sup.4, NR.sup.4 S(O).sub.n, CS.sub.2, S.sub.2 C, CO.S, SCO, N.dbd.N, N.dbd.CR.sup.1, CR.sup.1 .dbd.N, CHR.sup.1 CHR.sup.2 CH(OH), CHR.sup.1 OCO, CHR.sup.1 SCO, CHR.sup.1 NR.sup.Type: GrantFiled: October 17, 1988Date of Patent: April 16, 1991Assignee: Imperial Chemical Industries PLCInventors: John M. Clough, Christopher R. A. Godfrey, Stephen P. Heaney, Kenneth Anderton
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Patent number: 4681946Abstract: A process for the preparation of nicotinamide by amidation of a nicotinic acid/nicotinamide melt, vacuum distillation of the amidation mixture, removal of the nicotinamide as the bottom product and recycling of the top product, depleted with respect to nicotinamide, into the amidation stage together with addition of fresh amounts of nicotinic acid.Type: GrantFiled: November 14, 1985Date of Patent: July 21, 1987Assignee: BASF AktiengesellschaftInventors: Karl G. Baur, Volker Diehl, Peter Stops, Hans Hellbach, Erwin Brunner
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Patent number: 4503231Abstract: Hydrolysis of nitrile to amide by use of a quaternary ammonium hydroxide at 60.degree. to 95.degree. C.Type: GrantFiled: July 25, 1983Date of Patent: March 5, 1985Assignee: The Lummus CompanyInventors: George D. Suciu, Joon T. Kwon
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Patent number: 4447615Abstract: Crude nicotinamide is purified by a recrystallization and in this way freed especially from nicotinic acid and salts of nicotinic acid. As solvent there is used a 2-methylpropanol-1 containing water. The recrystallization takes place at a pH between about 7 and 10.Type: GrantFiled: July 29, 1981Date of Patent: May 8, 1984Assignee: Degussa AktiengesellschaftInventors: Helmut Beschke, Franz-Ludwig Dahm, Heinz Friedrich, Gunter Prescher
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Patent number: 4327219Abstract: In the hydrolysis of nicontinonitrile to nicotinamide, the hydrolysis effluent, containing nicotinamide, unconverted nicotinonitrile, ammonia and some ammonium nicotinate is stripped with gaseous ammonia to produce a molten nicontinamide bottoms, essentially free of nicotinonitrile, containing less than 10 wt % water and an overhead containing water vapor, ammonia and nicotinonitrile. An aqueous solution of ammonia and unreacted nicotinonitrile is recovered from the overhead and recycled to the hydrolysis, with gaseous ammonia in the overhead being recycled to the stripping.Type: GrantFiled: April 21, 1980Date of Patent: April 27, 1982Assignee: The Lummus CompanyInventor: Abraham P. Gelbein
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Patent number: 4314064Abstract: Nicotinamide is prepared from nicotinonitrile by hydrolysis at 120.degree. to 200.degree. C. employing alkali hydroxide.Type: GrantFiled: September 29, 1980Date of Patent: February 2, 1982Assignee: Detusche Gold- und Silber-Scheindeanstalt vormals RoesslerInventors: Helmut Beschke, Heinz Friedrich, Klaus-Peter Muller, Gerd Schreyer
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Patent number: 4304917Abstract: In the crystallization of a material from a liquid solution thereof wherein normal rapid cooling produces a non-filterable solid, the mixture of material and liquid is subjected to a high shear force field to produce a filterable slurry of the material, with the mixture being subjected to the shear force either during the cooling or subsequent thereto. The process is particularly applicable to recovering nicotinamide from a supersaturated aqueous solution thereof.Type: GrantFiled: June 18, 1980Date of Patent: December 8, 1981Assignee: The Lummus CompanyInventor: George D. Suciu
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Patent number: 4304937Abstract: A process of preparing a carboxylic acid amide which comprises reacting (a) an aldehyde with (b) at least one compound selected from the group consisting of ammonia, a primary amine and a secondary amine in the presence of a molecular oxygen-containing gas and palladium metal or platinum metal as the catalyst.Type: GrantFiled: November 13, 1979Date of Patent: December 8, 1981Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Nishikido Joji, Tamura Nobuhiro, Fukuoka Yohei
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Patent number: 4139536Abstract: Nicotinamide is recovered from the reaction mixture resulting from the hydrolysis of nicotinonitrile at elevated temperature by converting the nicotinamide into a melt while removing the solvent.Type: GrantFiled: April 12, 1976Date of Patent: February 13, 1979Assignee: Deutsche Gold- Und Silber-Scheideanstalt vormals RoesslerInventors: Helmut Beschke, Heinz Friedrich, Klaus-Peter Muller, Gerd Schreyer
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Patent number: 4128554Abstract: Carboxylic acid amides are obtained from aryl, heterocyclic, and vinylic halides and substituted derivates thereof, by reacting same with a primary or secondary amine and carbon monoxide, in the presence of a palladium catalyst and if necessry a tertiary amine at about 20.degree.-150.degree. C and from at least a half atmosphere pressure.Type: GrantFiled: March 10, 1977Date of Patent: December 5, 1978Assignee: University of DelawareInventor: Richard F. Heck