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Showing 1 to 18 of 18 for “"Polyphosphoric acid"”.

  1. Polyphosphoric Acid as a Reagent in Organic Chemistry

    Elston, Clayton TrevorUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:35:54Z (GMT). No. of bitstreams: 1 0009066.pdf: 4614760 bytes, checksum: f3cd93860f8823da438c9df100c13312 (MD5) Previous issue date: 1954

    uiuc Repository record

  2. Products From the Condensation of Acetophenone by Polyphosphoric Acid

    Johnson, Richard LynnUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:36:11Z (GMT). No. of bitstreams: 1 0013500.pdf: 2338837 bytes, checksum: 536159981c02d7697bd21ef200117c79 (MD5) Previous issue date: 1955

    uiuc Repository record

  3. The Hydrocarbons From The Polyphosphoric Acid Induced Condensation of Acetophenone

    Dejarlais, William JamesUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:36:38Z (GMT). No. of bitstreams: 1 0023318.pdf: 3336335 bytes, checksum: caf7d1a347de4995ec7c579a95e0d6bf (MD5) Previous issue date: 1957

    uiuc Repository record

  4. Self-condensation of ketones in the presence of polyphosphoric acid

    Roeske, Roger WilliamsUniversity of Illinois Urbana-Champaign1952

    uiuc Repository record

  5. I. Substituted Bis-Arene-Chromium Compounds. Ii. Structures of Hydrocarbons From the Polyphosphoric Acid Induced Condensation of Acetophenone

    Bush, Richard WayneUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:37:19Z (GMT). No. of bitstreams: 1 6001622.pdf: 3296636 bytes, checksum: 9552193003b080db3bc5488586701a5a (MD5) Previous issue date: 1960

    uiuc Repository record

  6. I. Synthesis of Compounds in the β-Carboline Series. II. Polyphosphoric Acid as a Dehydrating Agent in Organic Chemistry

    Werber, Frank XavierUniversity of Illinois at Urbana-Champaign1949

    uiuc Repository record

  7. I. The structure of the self-condensation product of 1-phenyl-2-pyrazoline. II. Reactions of acetophenone in the presence of polyphosphoric acid

    Bright, David BruceUniversity of Illinois Urbana-Champaign1952

    uiuc Repository record

  8. Novel Polyphenylquinoxaline and Polybenzimidazole Proton Exchange Membranes For High Temperature Fuel Cell Systems

    Seel, Darren Christopher

    … suitable for high temperature PEMFCs where polyphosphoric acid (PPA) is used as a condensation agent and as a casting solvent in a one-pot synthesis of polymer suitable for proton exchange membranes. This process, termed the "PPA Process," produces high molecular weight polymer with a …

    south-carolina Repository record

  9. A study of the synthesis and reactions of new polynuclear aromatic acids and related compounds

    Greenwood, Edward JamesVirginia Polytechnic Institute1966

    … carbinols during the distillation step. The keto-acid, 2-(3-chloro-l-naphthylmethyl)- 2’-carboxybenzophenone was prepared by the inverseaddition of the Grignard reagent of 2-(3-chloro-l-naphthylmethyl)bromobenzene to phthalic anhydride. Cyclization of this keto-acid with an acetic and hydrobromic …

    vt Repository record

  10. Synthesis and Chacterization of Novel Polybenzimidazoles and High-Solids Meta-Polybenzimidazoles

    Frankel, Jessica Sara

    … temperature PEM fuel cell systems, which uses polyphosphoric acid (PPA) as both the polycondensation agent and the casting solvent. This one-pot process, called the 'PPA Process', allows for the synthesis of high molecular weight polymer membranes with high acid-loading levels and good …

    south-carolina Repository record

  11. Exploring the Black Space of Compressive and Shear Modulus

    Morales Vega, Airam Marlee2017

    … the other three were modified with polymers and acids. Additionally, Polyphosphoric acid (PPA) is compared to the more traditional SBS polymer modification. PPA is currently prohibited in Arkansas because of a lack of information on its field performance. Three tests were performed: Uniaxial …

    arkansas Repository record

  12. Some chemistry of bromobenzopyrans

    Rahman, Md. MoshfiqurUniversity of Central Lancashire1995

    … of a phenol with an a,j3-unsaturated carboxylic acid. 2,4-Dimethylphenyl-3-methylbut-2-enoate was obtained as a by-product during the preparation of 2,2,6,8 tetramethylchroman-4-one from 2,4-dimethyiphenol and 3,3-dimethylacrylic acid in polyphosphoric acid. The ester in polyphosphoric acid …

    cent-lancashire Repository record

  13. The synthesis of novel indazole alkaloids with potential medicinal properties.

    Elhmalye, Elsanoussi.Sheffield Hallam University (United Kingdom).2005

    … a novel approach in which four p-monoacylated acid hydrazides 7a-d were prepared for cyclisation into indazoles 8a-d. Reaction of phenylhydrazine with benzoyl chloride, 4-benzyloxy benzoyl chloride and 4-nitrobenzoyl chloride gave hydrazides 7a-c whilst reaction of and 2-ethylphenyl hydrazine …

    sheffield-hallam Repository record

  14. Approaches to the synthesis of diazabiphenylenes

    Packham, Terence WilliamThames Polytechnic1983

    … of the dioxime(s) of this diketone and polyphosphoric acid then used as a catalyst to give the expected cis,trans,cis-4,10-diazatricyclo[6,4,0,0 2,7]- dodecane-3,9-dione as the major product. The Schmidt reaction of the diketone gave the known cis,trans,cis- 3,9-diazatricyclo[6,4,0,0 …

    greenwich Repository record

  15. Synthesis of Mononuclear Transition Metal Complexes and their Applications as Catalysts for Ethylene Polymerization

    Hamdi, ElagabUniversität Bayreuth

    … synthesized via condensation reactions using polyphosphoric acid which acts as solvent, oxidizing and dehydration agent. The condensation reactions proceeded readily to produce high yield products. Bis(benzimidazole)s can also be prepared by refluxing the reactant in 4 N hydrochloric acid for …

    bayreuth Repository record

  16. A study of aromatic cyclodehydration, I. Ortho effects II. The catalytic effect of metal oxides

    Spangler, Martin Ord LeeVirginia Polytechnic Institute1958

    … out in a sealed tube in hydrobromic and acetic acids at 150°C rather than at 117.5°C which was the temperature used previously. This increase was necessary to get a reaction with all the ketones concerned. Even under these conditions the 2'-hydroxy-2- benzylbenzophenone cyclized very poorly. …

    vt Repository record

  17. Mechanical and surface free energy characterization of asphalt concrete for moisture damage detection

    Abauwad, Ibrahim M.University of Illinois at Urbana-Champaign2016

    … butadiene styrene (SBS), SBS with LAS, and polyphosphoric acid (PPA) with HL. The effects of the additives and modifiers on the moisture susceptibility of the proposed AC mixtures were evaluated through several mixture- and component-level tests. The mixture-level tests are the modified …

    uiuc Repository record

  18. Synthesis and investigation of benzimidazole and carbazole ß-haematin inhibiting scaffolds with antimalarial activity

    L'abbate, Fabrizio PDepartment of Chemistry2018

    … synthesis, via a condensation reaction using polyphosphoric acid (PPA), 4-aminobenzoic acid and o-phenylenediamine to form the primary amine benzimidazole intermediate after which ani acylation reaction with the appropriate acid chloride furnished the desired compounds. β-haematin inhibition …

    cape-town Repository record