Abstract:
The present invention relates to certain processes and compositions useful for inhibiting the growth of slime in water and, in particular, water used for industrial purposes; for example, in the manufacture of pulp paper, in the manufacture of paper, in cooling water systems and in effluent water treatment. The novel processes and compositions of the present invention are processes or mixtures which show unexpected synergistic activity against microorganisms, including bacteria, fungi, and algae, which produce slime in aqueous systems of bodies which are objectionable from either an operational or aesthetic point of view. Specifically, the invention is directed to the use of compositions comprising a combination of a mixture of 75% of 5chloro-2-methyl-4-isothiazolin-3-one calcium chloride and 25% 2methyl-4-isothiazolin-3-one calcium chloride and Bis(trichloromethyl)sulfone.
Abstract:
The present invention is directed to a system and a method for tensioning a pliable, flexible material such as a membrane or film with the objective of minimizing the wrinkling tendency of the membrane. The method comprises applying a sealing means to a surface, applying the flexible material to the subject surface and against the sealing means, exerting a compressive force against the membrane and sealing means to cause the sealing means to respectively engage, tension and seal the membrane against the surface. The improvement is the provision of a groove in which the sealing means is loosely positioned, which groove is so designed as to provide that when the sealing means is compressed it flows in the groove, and then expands outwardly of the groove to engage and tension the membrane. The aspect which provides minimization of the wrinkling or lapping of the flexible material is the design of the groove. The groove basically possesses an inclined floor or ceiling as the case may be, which ensures the outward flow of the sealing means during compression. The outward flow provides proper tensioning together with minimum wrinkling or lapping of the material.
Abstract:
The present invention relates to certain processes and compositions useful for inhibiting and/or controlling the growth of slime in water and, in particular, water employed for industrial purposes. Water employed in the manufacture of pulp paper and water employed in cooling water systems, as well as other industrial waters, provide environments which are conducive to slime formation. The novel compositions of the present invention are mixtures which show unexpected synergistic activity against microorganisms, including bacteria, fungi and algae, which produce slime in aqueous systems. The slime, of course, is objectionable from an operational and/or aesthetic point of view. Specifically, the invention is directed to and the use of compositions comprising a combination of 5-chloro-4-phenyl-1, 2dithiole-3-one and organo-bromine compounds (or mixtures thereof). The inventive compositions inhibit the growth of slime in water, or more specifically, possess biocidal activity against bacteria, fungi and/or algae. The organobromine compounds contemplated for use in accordance with the present invention may be exemplified by; bis-1, 4-bromoacetoxy-2-butyne; bis-1, 4bromoacetoxy-2-butene; alpha-bromo-p-methylacetophenone and betabromo-betanitrostyrene.
Abstract:
A Cathode, an Anode wrapped in filter paper or other barrier to oxygen diffusion, a Reference Electrode (and optionally an Auxiliary Electrode) are placed in an aerated electrolytic liquid. The open circuit potential between the Cathode and Reference Electrode is impressed upon a capacitor. By means of a two-position switch an operational amplifier then causes the potential of the anode, in a circuit including the Reference Electrode, Auxiliary Electrode (or the electrode previously used as the Cathode) and an Ammeter, to become equal to the open circuit cathode-reference electrode potential impressed upon the capacitor. The amplifier provides the necessary current of either polarity to achieve the equality. The polarizing current flowing through the Ammeter is read and a qualitative indication of the pitting tendency is obtained.
Abstract:
The present invention is directed to pulp bleaching processes, and in particular compositions for use in the bleaching process to enhance the efficiency of the process. It was discovered that if a low molecular weight water soluble polymer of acrylic acid, or water soluble salt thereof was added either alone or together with a carboxymethyl cellulose to the bleaching solution, that less bleaching solution was required.
Abstract:
The present invention relates to certain processes and compositions useful for inhibiting the growth of slime in water and, in particular, water used for industrial purposes; for example, in the manufacture of pulp paper, in the manufacture of paper, in cooling water systems and in effluent water treatment. The novel processes and compositions of the present invention are processes or mixtures which show unexpected synergistic activity against microorganisms, including bacteria, fungi, and algae, which produce slime in aqueous systems or bodies which are objectionable from either an operational or aesthetic point of view. Specifically, the invention is directed to the use of compositions comprising a combination of 2,2-Dibromo-3nitrilopropionamide and Sodium linear dodecyl benzene sulfonate.