Patent application number | Description | Published |
20090270652 | PROCESS FOR TRANSFERRING HEAT TO A LIQUID COMPRISING DISSOLVED MONOMERIC ACRYLIC ACID, MICHAEL ACRYLIC ACID OLIGOMERS AND ACRYLIC ACID POLYMER - A process for transferring heat to a liquid F comprising dissolved monomeric acrylic acid, Michael acrylic acid oligomers, and acrylic acid polymer with the aid of an indirect heat exchanger to which are supplied the liquid F with a temperature T | 10-29-2009 |
20100022734 | PROCESS FOR SEPARATING ACRYLIC ACID PRESENT AS A MAIN CONSTITUENT AND GLYOXAL PRESENT AS A BY-PRODUCT IN A PRODUCT GAS MIXTURE OF A PARTIAL HETEROGENEOUSLY CATALYZED GAS PHASE OXIDATION OF A C3 PRECURSOR COMPOUND OF ACRYLIC ACID - A process for separating acrylic acid present as a main product and glyoxal present as a by-product in a product gas mixture of a partial gas phase oxidation of a C | 01-28-2010 |
20110036704 | PROCESS FOR REMOVAL OF ACRYLIC ACID FROM THE PRODUCT GAS MIXTURE OF A HETEROGENEOUSLY CATALYZED PARTIAL GAS PHASE OXIDATION OF AT LEAST ONE C3 PRECURSOR COMPOUND - A process for removal of a crude acrylic acid from a product gas mixture which comprises glyoxal as a by-product from a heterogeneously catalyzed partial gas phase oxidation of at least one C | 02-17-2011 |
20110140050 | PROCESS FOR INHIBITING POLYMERIZATION OF (METH)ACRYLIC ACID AND/OR (METH)ACRYLIC ESTERS - A process for inhibiting polymerization of (meth)acrylic acid and/or (meth)acrylic esters by introducing an oxygenous gas into the (meth)acrylic acid and/or the (meth)acrylic ester, in which the (meth)acrylic acid and/or the (meth)acrylic ester has a degree of purity of at least 95% and is in the liquid state. | 06-16-2011 |
20110162721 | PROCESS FOR CONVEYING A STREAM OF A LIQUID F COMPRISING (METH)ACRYLIC MONOMERS - A process for conveying a stream of a liquid F comprising (meth)acrylic monomers with a delivery pump P through a pipeline with circular cross-sectional area OF in which is mounted a restrictor B which firstly closes an area portion of the open cross-sectional area QF and secondly leaves open an area portion TF of the cross-sectional area QF, the outline of which comprises a circular arc of the circular outline of the cross-sectional area QF, said circular arc being within the lower tenth of the circular outline of the cross-sectional area QF. | 07-07-2011 |
20120085969 | PROCESS FOR INHIBITING UNWANTED FREE-RADICAL POLYMERIZATION OF ACRYLIC ACID PRESENT IN A LIQUID PHASE P - A process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P whose acrylic acid content is at least 10% by weight and which, based on the weight of the acrylic acid present therein, additionally comprises at least 100 ppm by weight of propionic acid and at least 100 ppm by weight of glyoxal, in which at least one chemical compound of the element copper is added to the liquid phase P, and the resulting liquid phases P to which a chemical compound of the element copper has been added. | 04-12-2012 |