Abstract: This invention generally provides a class of novel cationic resin comprised of a cross-linked polyamine having pendant tertiary and/or quaternary amine groups linked to amine groups in said polyamine by a hydrocarbon chain including a hydroxyl group in the .beta.-position with respect to the polyamine chain. In general, these resins can comprise the reaction product of a polyamine having secondary amine groups, a crosslinking agent, and a cationizing agent having an epoxide group and a tertiary or quaternary amine (quaternary ammonium) group. These cationic resins have been found to be useful for a variety of operations in the manufacture of paper and paperboard, especially as drainage aids and stabilizers for dispersed rosin sizing agents.

Abstract: Enzymatic dehalogenation of undesirable nitrogen-free organohalogen compounds is carried out by adding a dehalogenase to an aqueous composition comprising a nitrogen-free organohalogen compound and a nitrogen-containing cationic polymer. The enzymatic dehalogenation of the nitrogen-free organohalogen compound is achieved without any substantial effect upon the nitrogen-free organohalogen compound. The dehalogenation method may be carried out via continuous, batch, or semi-continuous processes.

Abstract: Enzymatic dehalogenation of undesirable nitrogen-free organohalogen compounds is carried out by adding a dehalogenase to an aqueous composition comprising a nitrogen-free organohalogen compound and a nitrogen-containing cationic polymer. The enzymatic dehalogenation of the nitrogen-free organohalogen compound is achieved without any substantial effect upon the nitrogen-free organohalogen compound. The dehalogenation method may be carried out via continuous, batch, or semi-continuous processes.

Abstract: A process for making wet strengthened paper comprises (1) treating an aqueous suspension of papermaking fibers with a composition comprising (a) a cationic polymer that cures at a neutral pH and is capable by itself of conferring wet strength to paper, the resin having a multiplicity of 3-hydroxyazetidinium ion groups along the polymer chain, and (b) a water-soluble carboxyalkylated polyamine polymer or a carboxylic acid salt thereof.

Abstract: A process for making an alkyl ketene dimer by the dehydrohalogenation reaction of a C.sub.8 -C.sub.32 aliphatic fatty acid chloride with a tertiary amine in an inert solvent and the product of the process; the solvent comprising at an oxygenated hydrocarbon.

Abstract: Enzymatic dehalogenation of undesirable nitrogen-free organohalogen compounds is carried out by adding bacteria to an aqueous composition comprising a nitrogen-free organohalogen compound and a nitrogen-containing cationic polymer. The enzymatic dehalogenation of the nitrogen-free organohalogen compound is achieved without any substantial effect upon the nitrogen-free organohalogen compound. The dehalogenation method may be carried out via continuous, batch, or semi-continuous processes NCIMB 40271, 40272, 40273 and 40274 were deposited on Apr. 2, 1990. NCIMB 40313 was deposited on Aug. 31, 1990 and NCIMB 40383 was deposited on Mar. 11, 1991.

Abstract: This invention generally provides a class of novel cationic resin comprised of a cross-linked polyamine having pendant tertiary and/or quaternary amine groups linked to amine groups in said polyamine by a hydrocarbon chain including a hydroxyl group in the .beta.-position with respect to the polyamine chain. In general, these resins can comprise the reaction product of a polyamine having secondary amine groups, a crosslinking agent, and a cationizing agent having an epoxide group and a tertiary or quaternary amine (quaternary ammonium) group. These cationic resins have been found to be useful for a variety of operations in the manufacture of paper and paperboard, especially as drainage aids and stabilizers for dispersed rosin sizing agents.

Abstract: A process for the manufacture of improved water soluble polyaminopolyamide-epichlorohydrin resins is disclosed. The polyaminopolyamide-epichlorohydrin reaction is continued until between 70% to 100% of the total charge of epichlorohydrin has reacted. The polyaminopolyamide-epichlorohydrin mixture is then treated with a specified amount of a halogen-free mineral acid. Preferably the mineral acid is selected from the group consisting of sulphuric acid, phosphoric acid, nitric acid and sodium hydrogen sulphate. Following the completion of the acid addition the reaction is continued to effect at least a 10% reduction in the polymer bound organochlorine concentration, based on the composition of the reaction mixture at the time of the acid addition.