The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 2001
Filed:
Jun. 26, 1998
Rashmikant Maganlal Contracter, Wilmington, DE (US);
Mark William Andersen, Charlottesville, VA (US);
Jean B. Myers, Wilmington, DE (US);
Gerard Hecquet, Bethune, FR;
Roland Kotwica, Pontpoint, FR;
Mireille Stojanovic, Paris, FR;
Charlotte Pham, Saverne, FR;
Michel Simon, St. Avold, FR;
Other;
Abstract
An improved method for manufacturing acrylic acid by vapor phase oxidation of propylene in a single step or reaction stage using as solid phase oxidant a mixture of two particulate solids comprising a bismuth molybdate multimetal oxide (e.g., Mo,Co,Bi,Fe,W,Si,K,O,) and a molybdenum vanadate multimetal oxide (e.g., Mo,V,Sr,W,Cu,O,). Such a process is advantageously carried out in a recirculating solids reactor system wherein the particulate mixture of solids in an oxidized state reacts with a feed gas containing propylene in a vertical riser reactor and after separation from the acrylic acid gaseous product the particulate mixture of solids in a reduced state is regenerated by contact with an oxygen containing gas in a separate regeneration reactor before recirculation to the riser for further reaction.