1050 results about "Peracetic acid" patented technology

Aqueous well treatment fluid compositions with biocidal activity are disclosed comprising a polymer for modifying fluid viscosity in the aqueous fluid, an organic monocarboxylic peracid being present in an anti-microbial amount of about 1 ppm to about 1000 ppm, and a controlled amount of hydrogen peroxide also being present. Peracetic acid is the preferred peracid. The viscosity-modifying polymer in the aqueous well treatment fluid composition may serve to reduce friction in the fluid or increase fluid viscosity. A method of using such compositions is also disclosed.

This invention relates to compositions and methods for removing overfilled substrates, preferably at a relatively high removal rates. Advantageously, a composition according to the invention can contain an oxidizer, preferably a per-type oxidizer such as a peroxide, periodic acid, and peracetic acid, and may also optionally contain an abrasive.

A wet-etch composition may include: peracetic acid (PAA); and a fluorinated acid; a relative amount of the PAA in the composition being sufficient to ensure an etch rate of (P-doped-SiGe):(P-doped-Si) that is substantially the same as an etch rate of (N-doped-SiGe):(N-doped-Si). Such a wet-etch composition is hereafter referred to as a PAA-based etchant and can be used to make, e.g., a CMOS MBCFET, an electrode of a capacitor, etc.

Provided are various methods, systems and reactors for producing peroxycarboxylic acid compositions, such as non-equilibrium compositions of peracetic acid, for example. The methods and systems relate to electrolytic generation of hydrogen peroxide or peroxide ions in a reactor, wherein the generated materials are reacted with an acetyl donor to form peracetic acid. In an embodiment, a source of alkali metal ions is provided to an anode chamber such that the ratio of concentrations of the alkali metal ions to protons in the anode chamber of a reactor is greater than 1.

The present invention relates to compositions including peroxyacetic acid and peroxyoctanoic acid and methods for preventing microbial growth in aqueous streams including the step of applying a composition of the invention to the stream. The compositions and methods can control microbial growth in aqueous streams used for transporting or processing food products.

A method for stabilizing a dilute peracetic acid solution containing less than about 5 wt % peracetic acid by controlling the concentration of hydrogen peroxide and the mole ratio of hydrogen peroxide to acetic acid and by introducing a stabilizer to provide sequestering activity. The method is particularly useful for the long-term stabilization of dilute peracetic acid solutions. Stabilized dilute peracetic acid solutions are also within the scope of this invention.

Aqueous well treatment fluid compositions are disclosed comprising an aqueous fluid containing polymer or copolymer for modifying fluid viscosity of the aqueous fluid and, in addition, an agent for effecting a controlled reduction in the aqueous fluid viscosity in a subterranean environment. The viscosity-reducing agent comprises a dilute concentration of peracetic acid. A method of using such compositions in oil- and gas-field treatment operations is also disclosed.

The invention provides self-disinfection chicken cage culture equipment. The self-disinfection chicken cage culture equipment comprises a frame, a cage and an egg conveying belt. A limiting plate is fixed to the upper portion of a front panel of the cage, the limiting plate is connected with an upper side plate in a sliding mode, hydraulic rods are fixed to the upper portion of a rear side plate, movable frames are fixed to the output ends of the hydraulic rods and fixedly connected with the limiting plate, a liquid inflow pipe is arranged on the upper portions of the side plates, and a medicine kettle is connected to the liquid inflow pipe in a threaded mode. Disinfection medicine is contained in the medicine kettle and comprises 60-90 g of folium artemisiae argyi, 60-90 g of sanguisorba officinalis, 60-90 g of gentiana scabra, 30-50 g of Rhizoma Ligustici, 30-50 g of cimicifugae foetidae, 30-50 g of cortex phellodendri, 30-50 g of rhizoma anemarrhenae, 30-50 g of curcuma zedoary, 30-50 g of radix sophorae flavescentis, 15-30 g of tripterygium glycosides, 15-30 g of Chinese azalea flowers, 15-30 g of calamine, 15-30 g of tenuifolia, 15-30 g of aloes, 15-30 g of ash bark, 15-30 g of radix scrophulariae, 10-20 g of chrysanthemums, 15 g of hydrargyrum oxydatum crudum and 15 g of peracetic acid. The self-disinfection chicken cage culture equipment is simple in structure, convenient to use and good in chicken output effect, the bodies of the chickens and the emptied cage are synchronously disinfected in the chicken output process, and the pathogenic bacterium contamination probability is reduced.

The invention relates to a temporary plugging agent for a medium/high-temperature (80-100 DEG C) oil-gas reservoir. The temporary plugging agent is prepared from the following components in percentage by mass: 2-20% of acrylamide, 0.02-0.5% of N,N-methylene-bisacrylamide, 0.005-0.03% of polymerization inhibitor, 0.05-0.3% of thickener, 0.005-1.0% of initiator, 0.1-10% of viscosity breaker and thebalance of water. The initiator is azobis(isobutylamidine hydrochloride), azodiisopropyl imidazoline or azodiisopropyl imidazoline hydrochloride; and the viscosity breaker is hydrogen peroxide, peracetic acid or peracetate. The temporary plugging agent can form high-strength gel under medium/high-temperature stratum conditions, can gelatinize within the specified time and thoroughly break the viscosity, does not damage the stratum after viscosity breaking, and can adapt to sectionalized reconstruction, repeated reconstruction and turning reconstruction of a long well interval of a medium/high-temperature oil-gas reservoir as well as temporary plugging operation of the well interval and stratum in need of temporary plugging.

A teat dip formula is disclosed for use on dairy animals with the objective of reducing or preventing mastitis. The teat dip formula preferably includes up to about 2% of peracetic acid in solution made by mixing acetic acid, hydrogen peroxide, and from up to about 5% by weight of composition of a thickening agent. Other constituents of the formula may include effective amounts of a skin conditioning agent or agents, a surfactant or surfactants and urea. A method of preparing and applying the formula is disclosed.

An Anti-Terrorism water quality monitoring system for continuously monitoring a potable water treatment system and related potable water distribution network that provides potable water to a municipality, city, housing development or other potable water consumer. The system includes the collection of data from the water distribution system and from the water treatment facility and from advanced separation processes which are integrated into analytical instruments. The data collected are stored in a remote database on a remote server computer or bank of computers and accessible by Homeland Security or its designated agency. Preferred parameters of monitoring include the turbidity and disinfectant such as chlorine, hypochlorous acid, sodium hypochlorite, calcium hypochlorite, ozone, chlorine dioxide, chloramines, hydrogen peroxide, peracetic acid.

The invention relates to a hydrogen peroxide and peracetic acid mixed disinfectant and a preparation method of the disinfectant. The disinfectant is prepared by the steps of mixing hydrogen peroxide, acetic acid and sulfuric acid at the room temperature to prepare mixture containing peracetic acid and hydrogen peroxide, feeding a stabilizer and a surface active agent into the mixture containing the peracetic acid and the hydrogen peroxide, and mixing. The mixed disinfectant comprises 3-9g/ 100g peracetic acid, 20-35g/ 100g hydrogen peroxide, 5-12g/ 100g acetic acid, 0.1-2g/ 100g sulfuric acid, 0.05-2g/ 100g stabilizer, 0.05-2g/ 100g surface active agent and the balance of water. The hydrogen peroxide and peracetic acid mixed disinfectant is good in stability, is capable of rapidly killing various microorganisms such as bacteria, mould, yeast, spores and the like, and is safe, non-toxic and free from secondary pollution.

Composition and method for production of peroxycarboxylic acid solutions for various disinfection and cleaning compositions that utilizes non-equilibrium peroxycarboxylic acid. More specifically compositions comprise peracetic acid (PAA) and methods for making non-equilibrium PAA are provided. Frozen compositions useful as antimicrobial ice are provided.

A surface which carries a material which is infected with prions is cleaned with an alkaline cleaning solution to remove as much proteinaceous material as possible from the surface. The cleaning agent is an alkaline cleaning agent which attacks prions remaining on the surface and which attacks prions removed from the surface during the cleaning step. After the cleaning solution is drained, a solution of surfactants, buffers, and heavy metal free corrosion inhibitors is circulated over the surface at 50°–60° C. The surfactants disperse and unclump the prion-contaminated material. A strong oxidant, preferably peracetic acid, is added to the solution to bring the peracetic acid concentration to 1,000–2,500 ppm. The peracetic acid or other strong oxidant attacks the prions, particularly the unclumped prion strands, deactivating the prions. After rinsing and drying, the surface may be wrapped in a microbe impermeable barrier and subjected to terminal sterilization, such as steam autoclaving.