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:
Sep. 12, 1978
Filed:
Oct. 22, 1976
Applicant:
Inventors:
Ignatius Schumacher, Webster Groves, MO (US);
James E White, Coshocton, OH (US);
Assignee:
Monsanto Company, St. Louis, MO (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
203-8 ; 203 62 ; 203D / ; 562598 ; 26034676 ; 560-4 ;
Abstract
The prior art discloses a number of polymerization inhibitors for acrylic acid, acrylates and derivatives thereof, but such polymerization inhibitors have low vapor pressures. Consequently, when acrylic acid is vaporized, it tends to polymerize on cooling surfaces causing undesirable deposits on storage vessels and the like. However, when a polymerization inhibiting amount of 2,4-pentanedione is added to the monomer, the polymerization of acrylic acid on cooling surfaces is inhibited.