Abstract: This invention relates to an ion exchange column for the removal of bacteria from a liquid medium wherein the column has, as an indicator to indicate when the column capacity for removal of bacteria is exhausted, a filter having submicron pores which will become plugged after a short period of usage with an exhausted bacteria-removing ion exchange column so that pressure build up will noticeably reduce the flow of liquid exiting from the filter thereby indicating to the user that the ion exchange column is exhausted. This invention also relates to a process for removing bacteria from a liquid medium wherein a bacteria containing medium is passed through an ion exchange column capable of removing such bacteria and then through a filter having submicron pores. When the capacity of the ion exchange column for removing bacteria is substantially exhausted, bacteria are removed by the submicron filter which quickly plugs.

Abstract: A method is disclosed for inhibiting the polymerization of N-substituted aminoalkyl acrylic monomers at ambient and above ambient temperatures such as during preparation, purification or storage of the monomers by adding thereto nabam, maneb, zineb, mancozeb, or a salt of tin (II), copper (I), manganese (II) or cobalt (II) in an amount effective to inhibit polymerization.

Abstract: This invention discloses an improved process for the manufacture of .alpha.,.beta.-unsaturated carboxylic acid esters from a .beta.-alkoxycarboxylic acid ester prepared by contacting an olefin having 2 to about 15 carbon atoms with an alcohol and carbon monoxide, where this alkoxycarbonylation reaction is performed with mutually independent improvements which include (A) reacting the compounds in the presence of a catalyst having as the major catalytic agent a salt of a platinum group metal and as a co-catalyst a salt of a metal selected from the group consisting of mercury (II) and tin (II), with a reoxidizing agent which is a salt of a multivalent metal having an oxidation potential more positive than the platinum group metal salt, (B) performing the reaction in an improved solvent system comprising the monohydric alcohol, the .beta.-alkoxycarboxylic acid ester and a solvent having a boiling point higher than that of the .beta.