Abstract: The invention relates to a retarder composition for the control of unwanted polymerization reactions during the production and processing of ethylenically unsaturated compounds, the composition comprising at least one di-substituted quinone compound and at least one hydroxylamine compound. Optionally, the composition also comprises at least one stable free radical nitroxyl compound and one or more formulation adjuvants. The invention also envisages a process stream comprising at least one ethylenically unsaturated compound, and a method for the prevention of unwanted polymerization reactions during the production and processing of ethylenically unsaturated compounds. The composition has been found to be far more effective than expected, given that the individual components show little or no efficacy when used alone, and poses much less hazard to humans than the compositions of the prior art.
Type:
Grant
Filed:
July 8, 2011
Date of Patent:
September 15, 2015
Assignee:
NUFARM UK LIMITED
Inventors:
Colin Loyns, Andrew Nigel Fawbert, Angela Jane Glossop, Peter Mark Price
Abstract: The invention concerns a formulation and method which allow for the efficient delivery of antipolymerants of low solubility into processes for the production of ethylenically unsaturated monomers, and associated process streams, and which avoid the potential health and safety problems and economic disadvantages which are associated with the methods of the prior art and facilitate the safe and efficient production of these monomers. Specifically, the invention provides an antipolymerant composition for the prevention of unwanted polymerisation reactions during the production and processing of ethylenically unsaturated compounds, the composition comprising a concentrated liquid formulation, wherein said concentrated liquid formulation is a suspension concentrate which comprises: (a) at least one compound selected from the group comprising phenols, quinones, thiazines, hydroxylamines and aromatic amines; (b) at least one dispersing agent; and (c) at least one polar or non-polar liquid carrier.
Type:
Application
Filed:
August 20, 2012
Publication date:
July 10, 2014
Applicant:
NuFarm UK Limited
Inventors:
Peter Price, Guillaume Duchamp, Angela Jane Glossop, Andrew Nigel Fawbert, Stephanie Mary Dwyer
Abstract: The invention relates to a retarder composition for the control of unwanted polymerisation reactions during the production and processing of ethylenically unsaturated compounds, the composition comprising at least one di-substituted quinone compound and at least one hydroxylamine compound. Optionally, the composition also comprises at least one stable free radical nitroxyl compound and one or more formulation adjuvants. The invention also envisages a process stream comprising at least one ethylenically unsaturated compound, and a method for the prevention of unwanted polymerisation reactions during the production and processing of ethylenically unsaturated compounds. The composition has been found to be far more effective than expected, given that the individual components show little or no efficacy when used alone, and poses much less hazard to humans than the compositions of the prior art.
Type:
Application
Filed:
July 8, 2011
Publication date:
May 9, 2013
Applicant:
NUFARM UK LIMITED
Inventors:
Colin Loyns, Andrew Nigel Fawbert, Angela Jane Glossop, Peter Mark Price