1
Takata Masahiro, Takamura Mamoru, Uchida Shinichi, Sasaki Masamitsu: Process for production of acrylic acid.. Nippon Catalytic Chem, November 30, 1988: EP0293224-A1 (47 worldwide citation)

A process for the production of acrylic acid by the two-stage catalytic vapour-phase oxidation of propylene with molecular oxygen, the first stage for oxidising propylene to produce mainly acrolein and the second stage for oxidising acrolein to produce mainly acrylic acid. The process comprises supp ...


2
Masahiro Takata, Mamoru Takamura, Shinichi Uchida: Process for production of acrylic acid. Nippon Shokubai Kagaku Kogyo, Burns Doane Swecker & Mathis, June 8, 1993: US05218146 (20 worldwide citation)

A process for the production of acrylic acid by the two-stage catalytic vapor-phase oxidation of propylene with molecular oxygen, the first stage for oxidizing propylene to produce mainly acrolein and the second stage for oxidizing acrolein to produce mainly acrylic acid, which process comprises sup ...


3
Tatsuya Kawajiri, Michio Tanimoto, Daisuke Nakamura: Process for production of acrylic acid. Nippon Shokubai, Sherman and Shalloway, February 17, 1998: US05719318 (13 worldwide citation)

As an improvement for the process for production of acrylic acid by subjecting acrolein or an acrolein-containing gas to gas-phase oxidation with molecular oxygen in a fixed bed multitubular reactor, there is provided a novel process capable of producing acrylic acid at a high yield by suppressing t ...


4
Kawajiri Tatsuya, Tanimoto Michio, Nakamura Daisuke: Process for production of acrylic acid. Nippon Catalytic Chem, September 3, 1997: EP0792866-A1 (13 worldwide citation)

A process for production of acrylic acid by subjecting acrolein or an acrolein-containing gas to gas-phase oxidation with molecular oxygen in a fixed bed multitubular reactor, wherein each reactor tube comprises two or more kinds of catalyst particles of different volumes so as to form a plurality o ...


5
Günther Bub, Jürgen Mosler, Franz Felix Kuppinger, Andreas Sabbagh, Guido Stochniol, Jörg Sauer, Markus Winterberg, Udo Knippenberg, Günter Latoschinski, Franck Furno, Thorsten Schwärtzke, Jörg Leistner: Acrylic acid and water-absorbing polymer structures based on renewable raw materials and process for their production by dehydration. Evonik Stockhausen, Smith Moore Leatherwood, May 10, 2011: US07939597 (12 worldwide citation)

The present invention relates to a process for production of acrylic acid, comprising the steps of a) dehydration of glycerine to an acrolein-comprising dehydration product; b) gas phase oxidation of the dehydration product to obtain an acrylic acid-comprising monomer gas; c) bringing into contact o ...


6
Tanimoto Michio, Mihara Ichiro, Kawajiri Tatsuya: Process for production of acrylic acid. Nippon Catalytic Chem, May 15, 1996: EP0711745-A1 (11 worldwide citation)

Acrylic acid can be produced efficiently by subjecting acrolein to catalytic gas-phase oxidation in the presence of a molybdenum/vanadium-based oxide catalyst prepared by using particular substances as the raw materials of the individual metal elements constituting the catalyst. A preferable example ...


7
Kazuhiko Sakamoto, Sei Nakahara, Takahiro Takeda, Masatoshi Ueoka, Yohji Akazawa: Process for the production of acrylic acid. Nippon Shokubai, Sherman and Shalloway, July 28, 1998: US05785821 (10 worldwide citation)

The present invention provides an improved process for production of acrylic acid by subjecting propylene and/or acrolein to catalytic gas-phase oxidation with a molecular oxygen-containing gas. In the process, the mixed gas obtained by the catalytic gas-phase oxidation is contacted with an aqueous ...


8
Sakamoto Kazuhiko, Nakahara Sei, Takeda Takahiro, Ueoka Masatoshi, Akazawa Yohji: Process for production of acrylic acid. Nippon Catalytic Chem, June 11, 1997: EP0778255-A1 (10 worldwide citation)

An improved process for production of acrylic acid by subjecting propylene and/or acrolein to catalytic gas-phase oxidation with a molecular oxygen-containing gas. The mixed gas thus obtained is contacted with an aqueous collecting agent comprising acrylic acid, acetic acid and a poorly-soluble-in-w ...


9
Michio Tanimoto, Ichiro Mihara, Tatsuya Kawajiri: Process for production of acrylic acid. Nippon Shokubai, Sherman and Shalloway, April 14, 1998: US05739392 (8 worldwide citation)

Acrylic acid can be produced efficiently by subjecting acrolein to catalytic gas-phase oxidation in the presence of a molybdenum/vanadium-based oxide catalyst prepared by using particular substances as the raw materials of the individual metal elements constituting the catalyst. A preferable example ...


10
Tatsuo Shiraishi, Susumu Kishiwada, Yoshihiko Nagaoka: Process for production of acrylic acid. Sumitomo Chemical Company, Birch Stewart Kolasch and Birch, May 30, 1978: US04092354 (8 worldwide citation)

A process for production of acrylic acid by the gas phase catalytic oxidation of acrolein with molecular oxygen in the presence of a catalyst, characterized in that the catalyst is a metal oxide catalyst containing as the metal elements Mo, V, Cu and X in a ratio of 12 : 0.1-16 : 0.1-8 : 0.01-12 as ...