Abstract: Uncured solvent-based paint may be flushed from a paint delivery installation using a substantially non-aqueous composition containing one or more organic solvents and a polymer having acid and/or amine functional groups.

Abstract: In process for cleaning tray columns which are used for the purposes of rectifiying liquids comprising (meth)acrylic compounds, a basic liquid is conveyed downward through the tray column and a gas is passed through the column in countercurrent to the basic liquid at an average gas phase differential pressure over all trays of at least 0.5 mbar/tray.

Abstract: In one embodiment of the invention, a method of cleaning a workpiece is disclosed. The method comprises providing a mobile flushing unit and servicing the workpiece as follows: a) connecting a flexible hose of the mobile flushing unit to one end of the workpiece and connecting another flexible hose of the mobile flushing unit to a second end of the workpiece; b) flowing compressed air through each hose and the workpiece; c) pumping a cleaning fluid through each hose and the workpiece for a predetermined amount of time; d) ceasing cleaning fluid flow, followed by purging with air to remove the cleaning fluid from the workpiece; e) pumping water through each hose and the workpiece for a predetermined amount of time; f) ceasing water flow, following by another purge with air to remove the water from the workpiece; and g) disconnecting each hose from the workpiece.

Abstract: Prion infectivity adsorbed onto substrates (for example, chromatographic columns used to fractionate blood plasma) is removed by treatment with 2M sodium chloride. Optionally, the substrate is further washed with 0.1 M sodium hydroxide.

Abstract: In one embodiment of the invention, a method of cleaning a workpiece is disclosed. The method comprises providing a mobile flushing unit and servicing the workpiece as follows: a) connecting a flexible hose of the mobile flushing unit to one end of the workpiece and connecting another flexible hose of the mobile flushing unit to a second end of the workpiece; b) flowing compressed air through each hose and the workpiece; c) pumping a cleaning fluid through each hose and the workpiece for a predetermined amount of time; d) ceasing cleaning fluid flow, followed by purging with air to remove the cleaning fluid from the workpiece; e) pumping water through each hose and the workpiece for a predetermined amount of time; f) ceasing water flow, following by another purge with air to remove the water from the workpiece; and g) disconnecting each hose from the workpiece.

Abstract: A novel cleaning composition comprises a dilutant, a wetting agent, a chelating agent, an alkaline builder, and a chlorine provider. The dilutant is preferably water. The wetting agent is alkoxylated alcohol. The chelating agent is an acrylic/maleic acid copolymer. The alkaline builder is sodium hydroxide. The chlorine provider is sodium hypochlorite. A method comprises the steps of partially filling the whirlpool tub with water, activating the whirlpool pump to circulate the water, adding to the circulating water a cleaning composition comprising a dilutant, a wetting agent, a chelating agent, an alkaline builder, and a chlorine provider, running the whirlpool pump for a predetermined time to circulate the water and cleaning composition thoroughly through the internal plumbing, and draining the whirlpool tub completely.

Abstract: In one embodiment of the invention, a method of cleaning a workpiece is disclosed. The method comprises providing a mobile flushing unit and servicing the workpiece as follows: a) connecting a flexible hose of the mobile flushing unit to one end of the workpiece and connecting another flexible hose of the mobile flushing unit to a second end of the workpiece; b) flowing compressed air through each hose and the workpiece; c) pumping a cleaning fluid through each hose and the workpiece for a predetermined amount of time; d) ceasing cleaning fluid flow, followed by purging with air to remove the cleaning fluid from the workpiece; e) pumping water through each hose and the workpiece for a predetermined amount of time; f) ceasing water flow, following by another purge with air to remove the water from the workpiece; and g) disconnecting each hose from the workpiece.

Abstract: A method and cleaning composition for removing engine deposits from turbine components, in particular turbine disks and turbine shafts. This method comprises the following steps: (a) providing a turbine component having a surface with engine deposits thereon, wherein the turbine component comprises a nickel and/or cobalt-containing base metal; and (b) treating the surface of the turbine component with a cleaning composition to convert the engine deposits thereon to a removable smut without substantially etching the base metal of the turbine component. The cleaning composition comprises an aqueous solution that is substantially free of acetic acid and comprising: a nitrate ion source in an amount, by weight of the nitrate ion, of from about 470 to about 710 grams/liter; and a bifluoride ion source in an amount, by weight of the bifluoride ion, of from about 0.5 to about 15 grams/liter.

Abstract: The present invention relates to a facility parts cleaning solution for the processing of (meth)acrylic acid and/or (meth)acrylic esters and a cleaning method using the cleaning solution. An aqueous cleaning composition comprising 5 to 50 wt % of at least one alkali metal hydroxide selected from the group consisting of sodium hydroxide and potassium hydroxide, 0.01 to 1 wt % of a water-soluble amino acid, 0.001 to 0.05 wt % of N,N?-methylene bisacrylamide, and 0.001 to 0.05 wt % of azobisisobutyronitrile is used to clean facility parts for manufacturing (meth)acrylic acid and/or (meth)acrylic esters in order to easily remove polymers and deposits.

Abstract: The invention provides a method for the removal of contaminating materials from pipework, the contaminating materials comprising deposits on the pipework which cause a reduction in the effective internal diameter of the pipes and thereby effect a reduction in the rate of flow of a fluid through the pipework, the method comprising treating the contaminating materials with at least one carbamate salt. The methods is also suitable for the treatment of contaminating materials which have a particularly deleterious effect on fluid flow and comprise partial or total blockages of the pipework. The carbamate is preferably in the form of an aqueous solution, and a preferred carbamate salt is ammonium carbamate. The treatment may be carried out in the presence of an additive such as caesium carbonate or ammonium bicarbonate. Optionally the treatment may be accompanied by a pre-treatment or post-treatment with aid, this being followed by a water wash.

Abstract: A method of dissolving scale comprises contacting the scale with a solution of an alkali metal bisulfate. Another method of dissolving scale comprises contacting the scale with a solution of an alkali metal bisulfate and a strong mineral acid. A further method of dissolving scale comprises contacting the scale with a solution of an alkali metal bisulfate and an inorganic oxidizer.

Abstract: The invention relates to a method of low temperature cleaning and applying an antimicrobial treatment to food and beverage plant equipment. In addition, the method includes carbon dioxide compatible chemistry. The method may be achieved through a multi-step method.

Abstract: A method of cleaning potable liquid flow lines employing a high pH caustic cleaning solution or a low pH acid cleaning solution with a stable dye in sufficient concentration so as to have a visible color when the solution is further diluted. The cleaning solution is pumped through the lines. The lines then are flushed with clean water until no colored solution is discharged from the lines, indicating the lines have been purged of cleaning solution. The method can be used with draft beer, soft drink or other potable liquid flow lines to prevent inadvertent consumption of caustic cleaning solution along with subsequently dispensed potable liquid.

Abstract: An aqueous detergent composition is provided containing phosphoric acid or salt thereof, an organic phosphate surfactant, a nonionic surfactant, and water. The aqueous detergent composition may be employed to improved the adhesion of a coating to a substrate. Also provided is a method of improving the adhesion of a coating to a substrate.

Abstract: The invention relates to a method of low temperature cleaning and applying an antimicrobial treatment to food and beverage plant equipment. In addition, the method includes carbon dioxide compatible chemistry. The method may be achieved through a multi-step method.

Abstract: In a method of cleaning and refurbishing a process chamber component having a metal coating having a surface thereon, the surface of the metal coating is immersed in an acidic solution to remove at least a portion of the process deposits from the surface. Thereafter, the surface of the metal coating is immersed in a basic solution to remove substantially all the metal coating. The component may optionally be bead blasting to roughen a surface of the component, and the metal coating may be re-formed.

Abstract: This invention provides a method of treating a dry or processed fluid pipe line susceptible to the build-up of iron sulfide deposits by complexing the iron sulfide in the pipe lines. The method of the present invention introduces the composition on a continuous or a batch basis to a gas pipe line. The composition is made of a solution of 1) water, 2) [tetrakis(hydroxymethyl)phosphonium]sulfate or chloride, and 3) a soluble ammonium salt, such as ammonium chloride or the like.

Abstract: Disclosed is a cleaning method of a ceramic member, which permits removing with a high accuracy the contaminants from a ceramic member contaminated with the contaminant. The cleaning method comprises the steps of processing the contaminated ceramic member with an alkaline chemical liquid having a pH value not smaller than 10 in the presence of an ultrasonic wave, processing the ceramic member processed with the alkaline chemical liquid with a prescribed acidic chemical liquid in the presence of an ultrasonic wave, and heating the ceramic member processed with the acidic chemical liquid under temperatures not lower than 1,000° C.

Abstract: This invention provides fluid-dispensing devices attachable to an air-intake system of an internal combustion engine for introducing an engine cleaner composition into the air intake system. The invention also provides methods of cleaning internal combustion engines using the fluid-dispensing devices.

Abstract: Brass articles having leachable lead are contacted with an aqueous caustic solution that contains a chelating agent. A brass article can optionally be post-treated by contacting it with an aqueous solution containing anazole.

Abstract: Process for removing deposits from water-carrying systems and devices for water supply, or from their individual parts, in which the deposits are dissolved by means of an aqueous treatment solution and removed in dissolved form from the system or the device or their individual parts, wherein the deposits are dissolved by means of an aqueous treatment solution comprised of a combination of (i) a reducing agent, in particular in the form of a slat-like, reducing sulfur-oxygen compound, nitrogen-oxygen compound or phosphorous-oxygen compound, and (ii) a complexing agent having phosphonic acid groups or phosphonate groups or a complexing agent of the hydroxy acid type at pH values in the range of approximately 4.5 to 9.5, in particular from approximately 6.0 to 8.0.

Abstract: A method of cleaning potable liquid flow lines employing a high pH caustic cleaning solution or a low pH acid cleaning solution with a stable dye in sufficient concentration so as to have a visible color when the solution is further diluted. The cleaning solution is pumped through the lines. The lines then are flushed with clean water until no colored solution is discharged from the lines, indicating the lines have been purged of cleaning solution. The method can be used with draft beer, soft drink or other potable liquid flow lines to prevent inadvertent consumption of caustic cleaning solution along with subsequently dispensed potable liquid.

Abstract: A cleaning method is provided for an ultrapure water supply system having an ultrapure water production apparatus connected to a point of use of ultrapure water via a passage. In the cleaning method, a basic solution, for example, is circulated through the system to change the surface potential of fine particles in the system from an opposite to the same polarity as that of elements constituting the system, thereby facilitating the removal of the fine particles, and the fine particles are then discharged from the system to outside together with the basic solution. The cleaning method has excellent cleaning capability and also makes it possible to shorten the rinsing time required for removing the residual constituent of the cleaning solution.

Abstract: A method of dissolving scale comprises contacting the scale with a solution of an alkali metal bisulfate. Another method of dissolving scale comprises contacting the scale with a solution of an alkali metal bisulfate and a strong mineral acid. A further method of dissolving scale comprises contacting the scale with a solution of an alkali metal bisulfate and an inorganic oxidizer.

Abstract: A composition and method for the removal of scale from a substrate are disclosed. The composition and method are more specifically utilized for the in situ removal of silicate-containing scale from interior surfaces of boilers and other heat exchange equipment. The silicate-containing scale is deposited in the boilers as silicate-sulfate complexes of calcium, magnesium, aluminum, and other metal atoms that are present in water. The composition, which is circulated throughout the boiler to contact the interior surfaces, such as the boiler tubes, includes a chelating agent having at least two carboxylic acid functional groups, preferably citric acid. The composition also includes an alkali metal hydroxide basic agent. The preferred alkali metal hydroxides are either potassium or sodium hydroxide. The basic agent establishes an overall basic pH of from 7 to 14 in the composition to enable precipitation of the metal atoms from the composition after interaction with the chelating agent.

Abstract: A portable apparatus cleans a passage such as an oxygen line by circulating a cleaning medium, such as a silicated alkaline cleaner such as OCC, through the passage. A rinse medium, such as distilled water, may than be circulated through the passage. The cleaning medium and the rinse medium may be filtered, and a flush medium is preferably circulated through the passage after the circulation of the cleaning medium and before the circulation of the rinse medium.

Abstract: A method of cleaning articles, such as infant feeding bottles is disclosed. The method provides for the use of alkali metal chloride, more particularly sodium chloride. The salt is deposited into the article to be cleaned, then water is added, and then the article is shaken to cause the crystalline substance to contact the interior walls of the container, thereby cleaning and sanitizing the interior of the article.

Abstract: A method to remove scale build-up in a vessel having at least one screen is described and involves placing a cover inside the vessel such that it is located beneath at least one screen to separate the screen from the rest of the vessel. The cover in the vessel forms an upper portion and a lower portion in the vessel. Preferably, the cover is in close proximity to the screen which is located in the upper portion of the vessel. The method then further includes introducing a chemical formulation into the upper portion of the vessel in a sufficient amount to remove at least a portion of the scale build-up on the screen. A system to remove scale build-up is also described and includes a vessel having at least one screen. The system further includes a cover located inside the vessel and beneath at least one screen to separate the screen from the rest of the vessel and to form an upper portion and a lower portion in the vessel. Normally the cover is in close proximity to the screen.

Abstract: A method is taught for cleaning photographic chemistry product fouling, including a proteinaceous portion and a non-proteinaceous portion from a liquid delivery system. The method comprises the steps of displacing resident product solution in the piping with water, hydrodynamically cleaning the piping system using two-phase flow a first time, chemically cleaning the piping system with an aqueous bleach solution to remove the proteinaceous portion of the photographic chemistry product fouling, chemically cleaning the piping system with a functionalized ethyl acetate solvent to remove the non-proteinaceous portion of the photographic chemistry product fouling, and hydrodynamically cleaning the piping system using two-phase flow a second time after the chemical cleaning steps to remove remaining residue. Preferably, after the second hydrodynamic two-phase flow cleaning step, the delivery system is subjected to a high purity water rinse.

Abstract: A method of prevention maintenance preventing parts of an etcher from being eroded is disclosed. First, a layer of hydrogen-free chemical compound is formed on surface of the parts of the etcher according to one embodiment of the present invention. Otherwise, the parts of the etcher are immersed into a tank containing hydrogen-free chemical compound according to another embodiment of the present invention. After that, a standard process of prevention maintenance is performed by a cleaning agent.

Abstract: A portable apparatus cleaning a conduit including a housing, a filter and a pump. The filter is attached to the conduit to be cleaned and an aqueous solution reservoir, and is storable within the housing. The pump is attached to the aqueous solution reservoir, and to the conduit to be cleaned, and is storable within the housing. A method for cleaning a conduit, which includes connecting a power supply to a pump, connecting an aqueous solution reservoir to the pump, connecting a conduit to be cleaned to the pump, connecting the conduit to be cleaned to a filter, connecting the filter to the aqueous solution reservoir, running the pump for a specified period of time, disconnecting the aqueous solution reservoir from the pump and filter, connecting the pump and filter to a container of distilled water, and running the pump for at least one cycle.

Abstract: A descaling composition for use in removing scale deposited on a member made of titanium or a titanium alloy, the descaling composition containing a hydroxycarboxylic acid, a sulfamic acid and ammonium sulfate as effective components and effectively inhibiting titanium ions from dissolving out.

Abstract: Brass articles having leachable lead are contacted with an aqueous caustic solution that contains a chelating agent. The brass article can optionally be post-treated by contacting them with an aqueous solution containing hydrogen peroxide.

Abstract: Plant parts which are used for the production or processing of (meth)acrylic esters are cleaned by (a) emptying the plant parts, (b) flushing the plant parts with aqueous 5 to 50% strength by weight alkali metal hydroxide solution, (c) removing the alkali metal hydroxide solution from the plant parts, (d) if required, washing the plant parts with water and (e) if required, drying the plant parts.

Abstract: A method for removing an acidic deposit containing a sulfur compound, which comprises contacting the acidic deposit with an aqueous solution of an alkali metal carbonate and/or an alkali metal hydrogencarbonate to remove it.

Abstract: The cleaning method described above is characterized by allowing a cleaning agent comprising an oxidizing agent, a chelating agent and fluorine compound to flow on a surface of a material to be treated at a high speed to thereby clean the above surface according to the present invention, deposits adhering firmly to a surface of a material to be treated can readily be removed without damaging the material to be treated.

Abstract: Plant parts which are used for the production or processing of (meth)acrylic esters are cleaned by

Abstract: The present invention relates to methods for cleaning, rinsing, and/or antimicrobial treatment of medical carts, medical cages, and other medical instruments, devices or equipment. The method for cleaning employs a solid alkaline, for example a solid carbonate, cleaning composition for cleaning the medical cart, cage, instrument, device, or equipment. The method for rinsing employs a solid neutral or neutralizing rinse composition for rinsing the medical cart, cage, instrument, device, or equipment. The method for antimicrobial treatment employs a solid, for example a solid quaternary ammonium or solid halogen, antimicrobial composition, for antimicrobial treatment of the medical cart, cage, instrument, device, or equipment.

Abstract: A chemical cleaning method for cleaning an internal passage of an engine-run gas turbine engine airfoil wherein the airfoil is immersed in an inorganic hydroxide medium at superambient temperature and atmospheric pressure for a short time to remove accumulated oxides and dirt from the internal passage. The hydroxide medium can comprise molten KOH and immersion times of the engine-run airfoil not exceeding 10 minutes are involved.

Abstract: A composition for cleaning and decontaminating medical devices such as dialyzers. A per-compound oxidant, for example, hydrogen peroxide (H2O2) and/or peracetic acid, is mixed with a buffer such as dipotassium hydrogen phosphate. The pH of the composition is between about 5-11. The composition effectively cleans the device, can achieve high level disinfection and sterilization of the device and is non-corrosive to plastics and adhesives used in the device.

Abstract: Paint residues may be removed from spraying equipment and the like by flushing with aqueous compositions containing alkoxylated aromatic alcohols wherein the aromatic ring moieties of such alcohols do not bear any alkyl substituent containing more than 4 carbon atoms. Preferably, the aqueous compositions also contain an alkanolamine or other base. The alkoxylated aromatic alcohols contain an average of at least about 2 oxyalkylene moieties (preferably, oxyethylene moieties) per molecule.

Abstract: Brass articles having leachable lead are contacted with an aqueous caustic solution having a pH of about 10 to about 14 that contains a chelating agent. During contact, the brass articles can be sonicated. The brass articles can be optionally pretreated by contacting them with an aqueous solution containing an organic carboxylic acid and an inorganic per-salt. The brass article can optionally further be post treated by contacting them with an aqueous solution containing thiourea.

Abstract: Brass articles having leachable lead are contacted with an aqueous caustic solution having a pH of about 10 to about 14 that contains a chelating agent. During contact, the brass articles can be sonicated. The brass articles can be optionally pretreated by contacting them with an aqueous solution containing an organic carboxylic acid and an inorganic per-salt. The brass article can optionally further be post treated by contacting them with an aqueous solution containing sodium persulfate.

Abstract: A paint-removing method comprises the steps of putting dimethyl sulfoxide into a tank, raising the dimethyl sulfoxide at a temperature of approximately 35° C. to 189° C. in the tank; and soaking a member to be removed of paint into the dimethyl sulfoxide in the tank. The dimethyl sulfoxide is applying or blowing to a member to be removed of paint.

Abstract: A portable apparatus cleans a passage such as an oxygen line by circulating a cleaning medium, such as a silicated alkaline cleaner such as OCC, through the passage. A rinse medium, such as distilled water, may than be circulated through the passage. The cleaning medium and the rinse medium may be filtered, and a flush medium is preferably circulated through the passage after the circulation of the cleaning medium and before the circulation of the rinse medium.

Abstract: A system and related method for cleaning structures including structures with interior surfaces. The system includes a mixing chamber for selectively combining a cleaning gas and liquid droplets together so that the droplets are entrained in the gas. The combination is directed to the structure to be cleaned. The velocity of the gas combined with the density of the liquid droplets provides a washing momentum to effect removal of particulate matter from the structure. The system also includes a condenser and a separator for separating the liquid from the gas after cleaning. A filter is employed to isolate and measure the quantity of particulate removed from the cooling circuit. A rotameter forms part of the system and is used to measure the accumulated quantity of liquid suitable for effecting a satisfactory cleaning. The system and related cleaning method may be used to clean the cooling system of a rotor bucket.

Abstract: A chemical cleaning method for cleaning an internal passage of an engine-run gas turbine engine airfoil wherein the airfoil is immersed in an inorganic hydroxide medium at superambient temperature and atmospheric pressure for a short time to remove accumulated oxides and dirt from the internal passage. The hydroxide medium can comprise molten KOH and immersion times of the engine-run airfoil not exceeding 10 minutes are involved.

Abstract: A method of prevention maintenance preventing parts of an etcher from being eroded is disclosed. First, a layer of hydrogen-free chemical compound is formed on surface of the parts of the etcher according to one embodiment of the present invention. Otherwise, the parts of the etcher are immersed into a tank containing hydrogen-free chemical compound according to another embodiment of the present invention. After that, a standard process of prevention maintenance is performed by a cleaning agent.

Abstract: The cleaning method described above is characterized by allowing a cleaning agent comprising an oxidizing agent, a chelating agent and a fluorine compound to flow on a surface of a material to be treated at a bigh speed to thereby clean the above surface. according to the present invention, deposits adhering firmly to a surface of a material to be treated can readily be removed without damaging the material to be treated.

Abstract: A composition for a cleaning-in-place system is described. The composition has a halogen dioxide and a optionally hydroxide and does not require the use of a detergent to display excellent cleaning and disinfecting properties on processing equipment such as the equipment found in breweries, dairy plants and carbonated beverage plants.