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Topic: Peracid

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	U.S. Patent: 6008405 - Stabilized peracid solutions - December 28, 1999
		In addition to stabilising the peracid solution during storage, the presence of stabilisers in the peracid solution may also have the additional benefit of enhancing the stability of the peracid solution in use, and consequently increasing the efficacy of the solution.
		The peracid, which in fact may be a mixture of peracids, can be present in a wide range of concentrations, for example up to 40%, often up to 15% and more often up to 10%.
		Peracid compositions suitable for stabilization according to the present invention, and particularly those containing aliphatic peracids, are often conveniently derived by oxidation of the corresponding aliphatic carboxylic acid with aqueous hydrogen peroxide, optionally in the presence of a strong acid catalyst, and often contain residual amounts of both the carboxylic acid and hydrogen peroxide.
	www.everypatent.com /comp/pat6008405.html (5174 words)

	Glycolate ester peracid precursors - Patent 4959187
		A peracid of the structure ##STR73## wherein R is C.sub.1-20 linear or branched alkyl, alkoxylated alkyl, cycloalkyl, aryl, alkyl substituted aryl; and R' and R" are independently H, C.sub.1-20 alkyl, aryl, C.sub.1-20 alkyl, aryl, C.sub.1-20 alkylaryl, aryl substituted with OH, CO.sub.2 or SO.sub.3, and NR.sup.a+.sub.3, wherein R.sup.a is C.sub.1-30 alkyl.
		The peracid of claim 2 having the structure ##STR74## wherein R is C.sub.4-17 alkyl, or aryl.
		A singularly important embodiment of this novel peracid is to stabilize the same, by neutralizing the peracid with either (preferably) an alkaline earth or alkali metal hydroxide, to give rise to the alkaline earth and alkali metal salts of the peracid.
	www.freepatentsonline.com /4959187.html (8647 words)

	NISTAC::Other Bleach Activators
		The peracid activators are ester derivatives of a carboxylic acid where the oxygen is covalently bound through a polyhydroxy linking group to a leaving group that is displaceable in a peroxygen bleaching solution by perhydroxide anion.
		In both the enzyme-containing and non-enzyme containing compositions, peracid and exotherm control agents are combined in a discrete granule in which the amount of water is carefully controlled to result in, respectively, maximum peracid and enzyme stability.
		A stable liquid peracid precursor composition for delivering a bleaching and cleaning material is provided in which the liquid peracid precursor composition combines a dispersion medium which comprises a stabilizing effective amount of a liquid matrix and an emulsifier, and a dispersed phase that comprises a peracid precursor.
	www.k-state.edu /tech.transfer/NISTAC/03-07.htm (3499 words)

	Patent 6,518,307
		If the peracid is to be delivered to a food animal for the purpose of preventing contamination of meat surfaces during slaughter, then it is preferred that the peracid is administered over a period just preceding slaughter.
		It may therefore be desirable for the practice of this invention to mix the components of the peracid or peroxygen solution at or near the location at which the biocidal solution is to be used.
		Peroxygenated carboxylic acids are often known as, or referred to, by peracid compounds, peroxygen compounds, peroxo compounds and peroxides of organic acids.
	www.pharmcast.com /Patents/Yr2003/Feb2003/021103/6518307_Microbial021103.htm (2743 words)

	Bleaching with phenylene diester peracid precursors - United States Patent 4,964,870
		In one embodiment of the invention, the novel peracid precursors are combined with a source of hydrogen peroxide and sufficient quantities of buffer to impact an alkaline pH when the composition is placed in aqueous solution.
		The invention generally relates to novel peracid precursors Typical precursors are esters, imide or enol ester compounds which are combined with a source of peroxygen, such as hydrogen peroxide, sodium percarbonate or sodium perborate.
		This theory is for purposes of explanation and not meant to restrict the scope of the invention.
	xrint.com /patents/us/4964870 (5444 words)

	Getting Caught in the Vortexx - Using Peracid Sanitizers
		Peracid is a synthetic chemical that is widely used in the meat and poultry processing industry as a sanitizer for food contact surfaces.
		Overall, peracids have shown to be extremely effective in situations where a biofilm may be present in the milkline.
		Peracid is an irritant to the eyes, skin and respiratory tract, and care should be taken when using this chemical or products containing peracid.
	www.omafra.gov.on.ca /english/livestock/goat/news/dgg0309a4.htm (805 words)

	Detergent product
		A composition according to claim 1, wherein said source of peracid is in the form of suspended particles.
		A composition according to claim 1, wherein said source of peracid is selected from the group consisting of peracid precursors, preformed peracid, and mixtures thereof.
		A composition according to claim 3 wherein the source of peracid is selected from the group consisting of tetraacetylethylenediamine, nonanoyl oxy benzene sulphonate, nonanoyl amido caproic oxy beazene sulphonate, and mixtures thereof.
	www.kapere.com /995/detergent_product_6995125.html (499 words)

	epoxides
		Peracids are carboxylic acids with an extra oxygen atom inserted between the carbonyl group and the OH group.
		The peracid transfers an oxygen atom to the alkene in a single step so the stereochemistry of the double bond is retained.
		The mechanism of peracid epoxidation involves nucleophilic attack of the pi-electrons from the double bond.
	people.uis.edu /gtram1/organic/alkenes/epoxides.htm (288 words)

	Preparation of organic sulfone compounds
		The preferred amount of peracid employed in the conduct of the process of this invention is from about 1.5 moles to about 6 moles of peracid per equivalent of sulfide functional unit.
		Aqueous peracid solutions utilized as oxidising agents in the process of this invention can be generated by reacting the corresponding carboxylic acid with aqueous hydrogen peroxide in the presence of an appropriate catalyst, as disclosed in British Pat.
		To more particularly demonstrate the increased efficiency of the peracid oxidation process of this invention in comparison with known peracid oxidation processes, the experimental results of three representative examples of the process of this invention were compared with the experimental results from an example of a known process.
	www.skk-banjaluckapivara.com /invent/animal_feeder/preparation_organic_sulfone_compounds.html (3093 words)

	Peracid forming system, peracid forming composition, and methods for making and using
		Preferably, the peracid forming composition includes a chemical heater capable of releasing heat upon hydration.
		The water combines with the peracid precursor and peroxygen source to provide an aqueous peracid composition.
		contacting a surface having a microbial population with the aqueous peracid sanitizer solution for sufficient period to substantially reduce the population of microorganisms on the surface.
	www.kapere.com /245/peracid_forming_system_peracid_forming_composition_and_methods_for_6245729.html (635 words)

	U.S. Patent: 5008079 - Apparatus and method for sterilizing or disinfecting objects - April 16, 1991
		carrying out said disinfecting or sterilizing with an organic peracid in a concentration of more than about 7 up to about 50% in aqueous solution, said organic peracid being a powerful oxidizing agent and wherein the concentration of said peracid in aqueous solution is about 20 to 50%.
		carrying out said disinfecting or sterilizing with an organic peracid in a concentration of more than about 7 up to about 50% in aqueous solution, said organic peracid being a powerful oxidizing agent and wherein said disinfecting or sterilizing is additionally carried out at a temperature of about 20.degree.
		Contrary to the procedures of the prior art, even about a 20 to 50% organic peracid solution can be used with the present invention, with the concentration of the aqueous solution of the peracid used being advantageously about 40%, meaning that with the present invention a short sterilizing time, i.e.
	www.everypatent.com /comp/pat5008079.html (2896 words)

	esp@cenet description view
		Therefore, the reaction of the organic peracid precursors with the hydrogen peroxide releasing material is notably inhibited, thereby preventing the generation of organic peracids, which are bleaching species.
		The bleaching detergent composition of the present invention is in the form of granules or powders and contains an organic peracid precursor which produces an organic peracid having an alkyl group with 7 to 19 carbon atoms upon reaction with hydrogen peroxide in water, and a hydrogen peroxide releasing material.
		The organic peracids produced thereby include peroxy fatty acids, with a preference given to the peroxy fatty acids each having a linear alkyl group with 7 to 19 carbon atoms, particularly 8 to 14 carbon atoms.
	v3.espacenet.com /textdes?DB=EPODOC&IDX=EP0738777&QPN=EP0738777 (6811 words)

	Acyloxynitrogen peracid precursors (US4957647)
		Peracid precursors containing these leaving groups provide new, proficient and cost-effective compounds for fabric bleaching.
		Peracid and bleach activator compounds and use thereof in cleaning compositions
		Lewis, "Peracid and Peroxide Oxidations," In; Oxidation, vol.
	www.delphion.com /details?pn=US04957647__ (400 words)

	Patent 7,056,536
		The peracid normally exists in an equilibrium state with the original or fundamental acid and the peroxide source, usually hydrogen peroxide.
		Typical peracids include peracids of C.sub.1 to C.sub.12 carboxylic acids such as formic acid, acetic acid, propanoic acid, butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, and the like.
		Mixtures and combinations of the peracids may also be used in the systems of the invention, as well as other addenda as generally described herein.
	www.pharmcast.com /Patents100/Yr2006/June2006/060606/7056536_Sterilant060606.htm (1379 words)

	Chiral synthesis of alpha-aminophosponic acids
		The peracid utilized in step (a) is preferably an aryl peracid such as peroxybenzoic acid or 3-chloroperoxybenzoic acid.
		Acyl chlorides of amino acids may be prepared from the amino acid by treatment with thionyl chloride, phosphorus trichloride, or phosphorus pentachloride as is known to those of skill in the art.
		The acyl chloride may be reacted with the peracid by, for example, combining them in a solution or suspension and adding pyridine dropwise with cooling and stirring.
	www.emergenthomestore.com /techcat/electrical_switch/chiral_synthesis_alpha-aminophosponic_acids.html (5245 words)

	Pourable sulfone peracid compositions - United States Patent 5,039,447
		The invention relates to aqueous stable liquid bleaching compositions comprising a sulfone peroxycarboxylic acid, an anionic surfactant, a non-ionic surfactant and optionally a salt stabilizer.
		A composition of claim 1 wherein A is linear alkyl containing one peracid group and the sulfonyl group and peracid group are on the opposite side of the terminal carbon atoms of said A moiety.
		More preferably A is a hydrocarbyl group containing from 6 to 12 carbon atoms and containing no peracid group while B is a hydrocarbyl group containing from two to seven carbon atoms substituted with one peracid group.
	xrint.com /patents/us/5039447 (2812 words)

	DEA Resources, Microgram Journal, A Rapid and Simple GC/MS Screening Method for 4-Methoxyphenol in Illicitly Prepared ...
		The peracid oxidation of anethole also produces 4-methoxyphenol, which can be isolated from illicitly prepared PMA via a simple and rapid procedure, and subsequently identified via GC/MS.
		We have previously shown that 4-methoxyphenol is a specific marker for the synthesis of PMP2P via peracid oxidation of anethole [4].
		4-Methoxyphenol is a synthetic by-product formed during the peracid oxidation of anethole, and thus serves as a marker compound for PMA prepared using anethole as the original precursor.
	www.usdoj.gov /dea/programs/forensicsci/microgram/journal071203/mj071203_pg5.html (1651 words)

	DG3: DBA case T 0241/89 - 3.3.1 (Site not responding. Last check: 2007-09-10)
		The reduction in peracid stability causes a decrease in peracid concentration in the bleaching solution with consequent deterioration of bleach efficiency.
		Therefore, with respect to sufficiency, it is necessary to consider whether, in the absence of these specific details, the skilled person would be in a position to determine the amount of reactive titanium in any low temperature bleaching detergent composition falling within the terms of the preamble of the present Claim 1.
		In resolving this question, it should be borne in mind that the concept of reactive titanium in the context of the destabilisation of peracid in detergent formulations was introduced for the first time in the disputed patent.
	legal.european-patent-office.org /dg3/biblio/t890241eu1.htm (1434 words)

	The Peracid Oxidation of Isosafrole: A Review - [www.rhodium.ws]
		A peracid is a carboxylic acid which has been reacted with hydrogen peroxide to form a highly reactive peracid, which is able to transfer one of its oxygen atoms to the alkene, forming an epoxide (a three-membered ring containing two carbon atoms and one oxygen
		Almost any peracid can be used to oxidize alkenes, one of the most often used on small scales in professional laboratories is m-chloroperbenzoic acid, which is relatively stable in its pure state, or magnesium monoperoxy- phtalate.
		The advantage is that they do not have to be prepared immediately before use, but the drawback is their high molecular weight (very much of the peracid would be needed on a large scale) and that they are much more expensive than performic acid.
	www.erowid.org /archive/rhodium/chemistry/peracid.html (2371 words)

	[No title] (Site not responding. Last check: 2007-09-10)
		Two bonds to the blue oxygen of the peracid are broken, the bond to the other O (green) and the bond to the H (which is transferred to the red O).
		The pi electrons of the alkene form a bond to the blue O and an unshared pair of electrons on the blue O is used to form the other bond of the epoxide ring.
		The peracid has lost the blue O to form a normal carboxylic acid.
	www.du.edu /~jhornbac/organic/page438top.html (108 words)

	ARS \| Publication request: Peracid Formation Is Not the Basis for Resistance to Fungal Infection in Plants Transformed ... (Site not responding. Last check: 2007-09-10)
		Citation: Jacks, T.J., Rajasekaran, K., Stromberg, K.D., DE Lucca Ii, A.J., Van Pee, K.H. Peracid Formation Is Not the Basis for Resistance to Fungal Infection in Plants Transformed with Nonheme Haloperoxidase.
		In order to elucidate if peracid formation by HPO-P could be the basis for increased fungal resistance, effects of hydrogen peroxide-HPO-P mixtures on the lethality of acetate were determined.
		Thus, peracid generation by HPO-P is not the basis for enhanced antifungal activity in plants transformed with the HPO-P gene.
	www.ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=118148&pf=1 (408 words)

	Apparel Views: Your window to the world of apparel industry... (Site not responding. Last check: 2007-09-10)
		The peracid anion, CH3CO3-, is the low temperature bleaching species instead of the HOO-.
		Another peracid that has been commercialized is diperoxydodecanedioic acid, DPDDA [H03C(CH2)10-CO3H].
		It is effective over a range of oxidisable stains and because of the long chain length it behaves as pernonanoic acid does, solubilising lipophilic stains.
	www.apparelviews.com /processing/texbleaapril05.html (1354 words)

	Chemical Functional Definitions
		Hypochlorite, peroxides, peracids, singlet oxygen are very reactive chemical species; they react with certain parts of organic matter that are responsible for its color.
		However, many peracids are not sufficiently stable to be added to a detergent product.
		and bleach activators produces peracids; the latter are the actual bleaching agents.
	www.scienceinthebox.com /en_UK/glossary/bleaches_en.html (907 words)

	Bleach composition
		The peracid to bromide equivalent ration between 2:1 and 1:2 is preferred, but dye transfer and hygiene benefits are possible with a ratio up to 1:50.
		As the reaction of bromides with peracids probably involves a nucleophilic attack of bromide ion on the electrophilic peroxidic oxygen, the rate of reaction will depend on the concentration and reactivities of the bromide and peracid.
		Examples of aromatic peracids are monoperphthalic acid, perbenzoic acid, m-chloro-perbenzoic acid, diperisophthalic acid or mixtures thereof.
	www.sacnewsmonthly.com /invent/bleach_composition (2324 words)

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