Patent GB-991151-A (GB)
Title: Control of micro-organisms
IPC: C02F1/72
Filed: 1963-09-23
Abstract: A method of inhibiting deterioration by microbial attack of an organic substance, e.g. paper pulp, that is susceptible to deterioration in the presence of an aqueous liquid by the action of micro-organisms and inhibiting the formation of slime in said aqueous liquid in contact with the organic substance comprises adding e.g. to paper pulp during paper manufacture to said aqueous liquid a mono-substituted 2-bromo acetophenone of formula <FORM:0991151/C1/1> wherein n and n1 each represent 0 or 1 and when n is 0, n1 is 0, the 2-bromo acetophenone being such that, when n is 1 and n1 is 0, the point of attachment of the CH3O group is at any one of the positions designated as ortho, meta, and para and, when n or n1 are each 0 or when n and n1 are each 1, the point of attachment of the OH or CH3.CO2 group is at either of the positions designated as meta and para, in an amount sufficient to inhibit the growth of said micro-organisms.  Other specified organic substances are starch, proteinaceous substances, animal hides, vegetable tanning liquors and leather.  Specifications 809,351 and 848,244 are referred to.ALSO:The invention relates to 2-bromo-m-hydroxy acetophenone, which is prepared by reacting m-hydroxy acetophenone with bromine in chloroform solution.  The compound is used as a preservative (see Division A2).  Specifications 809,351 and 848,244 are referred to.ALSO:A method of inhibiting deterioration by microbial attack of an organic substance, e.g. paper pulp, that is susceptible to deterioration in the presence of an aqueous liquid by the action of micro-organisms and inhibiting the formation of slime in said aqueous liquid in contact with the organic substance comprises adding, e.g. to paper pulp during paper manufacture to said aqueous liquid, a mono-substituted 2-bromoacetophenone of formula <FORM:0991151/A5-A6/1> wherein n and n1 each represent 0 or 1 and when n is 0, n1 is 0, the 2-bromoacetophenone being such that, when n is 1 and n1 is 0, the point of attachment of the CH3O group is at any one of the positions designated as ortho, meta, and para and, when n and n1 are each 0 or when n and n1 are each 1, the point of attachment of the OH or CH3.CO2 group is at either of the positions designated as meta and para, in an amount sufficient to inhibit the growth of said micro-organisms.  Other specified organic substances are starch, protein-aceous substances, animal hides, vegetable tanning liquors and leather.  Specification 809,351 and 848,244 are referred to.ALSO:A method of inhibiting deterioration by microbial attack of an organic substance e.g. paper pulp, starch, proteinaceous substances, animal hides, and leather, that is susceptible to deterioration in the presence of an aqueous liquid by the action of microorganisms and inhibiting the formation of slime in the aqueous liquid in contact with the organic substance comprises adding to the aqueous liquid a mono-substituted 2-bromoacetophenone of formula <FORM:0991151/A1-A3/1> wherein n and n1 each represent 0 to 1 and when n is 0, n1 is 0, the 2-bromoacetophenone being such that, when n is 1 and n1 is 0, the point of attachment of the CH3 group is at any one of the positions designated as ortho, meta, and para and, when n or n1 are each 0 or when n and n1 are each 1, the point of attachment of the OH or CH3.CO2 group is at either of the positions designated as meta and para, in an amount sufficient to inhibit the growth of the micro-organisms.  Specifications 809,351 and 848,244 are referred to.ALSO:A method of inhibiting deterioration by microbial attack of paper pulp that is susceptible to deterioration in the presence of an aqueous liquid by the action of micro-organisms and inhibiting the formation of slime in said aqueous liquid in contact with the paper pulp comprises adding during paper manufacture to said aqueous liquid a mono-substituted 2-bromo acetophenone of formula:- <FORM:0991151/D1-D2/1> wherein n and n1 each represent 0 or 1 and when n is 0, n1 is 0, the 2-bromo acetophenone being such that, when n is 1 and n1 is 0, the point of attachement of the CH3O group is at any one of the positions designated as ortho, meta, and para and, when n or n1 are each 0 or when n and n1 are each 1, the point of attachment of the OH or CH3. CO2 group is at either of the positions designated as meta and para, in an amount sufficient to inhibit the growth of said micro-organisms.  Specifications 809,351 and 848,244 are referred to.