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Publication numberUS2022262 A
Publication typeGrant
Publication dateNov 26, 1935
Filing dateFeb 19, 1932
Priority dateFeb 19, 1932
Publication numberUS 2022262 A, US 2022262A, US-A-2022262, US2022262 A, US2022262A
InventorsWhite James F
Original AssigneeMathieson Alkali Works Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stain removal
US 2022262 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Patented" Nov; 26,1935

" '7 RE OVAL I ,Niagara Falls, N. Y., assignorgto' I James F White The Mathieson Alkali'Works, 1110.; New *York,

' N. Y., a corporation of Virginia I No Drawing.

This invention relates to an improved stain removing process comprising treatment stained material with a chlorite, such as chlorite or calciumchlorite, and oxalic aqueous solution. an improved stain removing. composition.

Chlorites ar at the same time are destructive action with r salts 'of chlorous acid H0102.

Incarrying out the process of theinventlon, g the stained material is subjected to-treatment with aqueous solutions containing a chlorite, or v I the chlorite radical, and oxalic acid. 'I'helstained" single aqueous solution ontai rite and the oxalic i may be subjected an aqueoussoluti ous solution containing the oxalic acid,

alkaline or neutral but with advantage is'acid. Such acidity may be supplied bysuch acids or acid salts.

pie, from 10-25 grams per liter of sodium and from 10-25 grams per liter of oxalic acid;

The process and composition of the invention are of special value and application in The invention also includes e effective in removing stains and free from tendencies toward espect I particularly to cotton and rayon textiles. The oxalic acid, simlz larly, is effective in removing stains, operating in a peculiarly efiective manner in conjunction.

with the chlorites in this respect. Although the I oxalic acid has reducing properties it is oxidized but slowly by the-'chlorites. The chlorite radical and the oxalate radical are the components of these reagents essential to the process of the in- I I vention. The term chlorite is used in this applicalcium. chlorite is bestavoided. cation in its strict chemical sense to define the. q

The treating solutions may contain, for exam 'Application February 19, 1932 t SerialZ No. 594,153- II i chlorite, such'as sodium chlorite or calcium ch10 tive, the chlorite solution may'contain; for 'exg and'the-oxalicaci'd solution may contain, for example, about 6 grams perliter of oxalicacid. 10 V '1' The chlorites of the alkalirmetalsand the a1ka-' spect' to each other to avoid undesired preci I tion in the treating solution or solutions. j For The stainremoving compositionfoithe inven- ,uon comprises dry'gmixtures, oi -,these chlorites, 20* oxalate salts, such as sodiumoxalate, and acid agents 'such as 'boric acid,'sodlum acid su lfate--;' potassium acid phosphateand sodium silico' fiuor quiredquantity ofqstain removing solution, small one part of sodium o'xalatean'd tw tassium dihydrogen'phosphate, '11 claim:

subjecting the stain to treatment with an aqueous" solution comprising a chlorite. from the group.

earth metal chlorites, anda substance from the oxalates.

may be 2.-A sta1n removing pr'ocesswhich 1cornD 'Q ses' aqueous solution comprising a-chlorite' from} the Y group consisting of alkalij-metal-chlorites and alfrom the groupiconsistingof oxalic acid and water-soluble oxalates. t V I 3. A stain removing composition which com"- prises a dry mixture, of a water-soluble chlorite chlorite the resoluble-oxalate, and an acidifying agent.

JAMES n-wm'rn.

treatment'with anaqueous solution containing: theoxalic acid. i Inapplying thelatter alterna -m 'ample, about 16 grams per liter of so'dium chlorite" I line-earth-metals are useful in "carrying out the: invention. The several age'nts used in-anycne embodimentof the process are chosen 'withrepita- 15 example, the use of a sulfate inconjunction with r II I 'ide', These mixtures are-'st'ablaandg simply by material may be subjected "to treatmentwith a; solution in water, may; be used to prepareany'reQZS if;

ning both the chloe stained material treatment, with I containing the chlorite and a separate aqueouss'clution containing the oxalic acid. The aqueous solution containing oxalic acid may be an aqueous solution of oxalic acid or of an oxalate, such as sodium oxalate, and an acid or acid salt, such as acetic acidor, when'used in conjunction with sodium chlorite for'exainplasodium acid sulfate, potassium acid'phosphate .or sodium silico fluoride. The aqueous solution con-I taining a chlorite, when separate from the aqueor large. Thecompositionmaycomprise; forex ample, one part (by weight) oisodium'chIorite,

1. A' stain removing-process: which comprises consisting, or alkali-metal chlorltes and alkaline- 35 I group consistingloi oxalic acid-and water solubleb subjecting the stain totreatmentwith acid 40 kaline-earth-metal chlorites, and a substance from. the group consisting of'alkal i-me'tal .chlo- I rites and al-kalineearth-metal chlorites, a-water; t

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2430674 *Jan 11, 1943Nov 11, 1947Mathieson Alkali Works IncMethod of bleaching
US2482891 *Mar 16, 1945Sep 27, 1949Olin MathiesonSolid, stable chlorine dioxide generating compositions
US2529831 *May 3, 1947Nov 14, 1950Atlas Powder CoBleaching of organic material
US2739032 *Mar 30, 1953Mar 20, 1956Wilson William KIron-catalyzed decomposition of sodium chlorite
US3035883 *Nov 13, 1959May 22, 1962Olin MathiesonChlorite-permanganate cellulosic bleaching process
US5399288 *Jun 30, 1993Mar 21, 1995Abic LimitedSolid composition releasing chlorine dioxide
US6077495 *Feb 13, 1998Jun 20, 2000Engelhard CorporationMethod, composition and system for the controlled release of chlorine dioxide gas
US6238643May 6, 1999May 29, 2001Engelhard CorporationMethod and device for the production of an aqueous solution containing chlorine dioxide
US6294108Sep 28, 1999Sep 25, 2001Engelhard CorporationComposition for the controlled release of chlorine dioxide gas
US6582734Jul 20, 2000Jun 24, 2003Ecolab Inc.Antimicrobial composition useful for the treatment of bovine mastitis
US6602466Feb 16, 2001Aug 5, 2003Selective Micro Technologies, LlcApparatus and method for controlled delivery of a gas
US6607696Sep 12, 2000Aug 19, 2003Selective Micro Technologies, LlcApparatus and method for controlled delivery of a gas
US6764661Jun 27, 2000Jul 20, 2004Avantec Technologies, Inc.Device for producing an aqueous chlorine dioxide solution
US7160484Jan 12, 2001Jan 9, 2007Engelhard CorporationMethod and device for the production of an aqueous solution containing chlorine dioxide
US7220367Jun 12, 2001May 22, 2007Basf Catalysts LlcMethod and system for the controlled release of chlorine dioxide gas
US7922984Apr 12, 2011Selective Micro Technologies, LlcApparatus and method for controlled delivery of a gas
US8361409Feb 23, 2006Jan 29, 2013Odorstar Technology, LlcSystems and methods for producing aqueous solutions and gases having disinfecting properties and substantially eliminating impurities
US8673297Feb 28, 2006Mar 18, 2014Basf CorporationChlorine dioxide based cleaner/sanitizer
US8691154Feb 17, 2012Apr 8, 2014Diversey, Inc.Apparatus for the generation of cleaning and/or sanitizing solutions
US9078939Jan 23, 2012Jul 14, 2015Star-Brite Distributing, Inc.Disinfectant system
US9340756Feb 27, 2014May 17, 2016Basf CorporationChlorine dioxide based cleanser/sanitizer
US20010036421 *Jun 12, 2001Nov 1, 2001Engelhard CorporationMethod and system for the controlled release of chlorine dioxide gas
US20040022676 *Aug 22, 2002Feb 5, 2004Selective Micro Technologies, LlcApparatus and method for controlled delivery of a gas
US20060039840 *Aug 18, 2004Feb 23, 2006Avantec Technologies, Inc.Device and methods for the production of chlorine dioxide vapor
US20060039841 *Sep 19, 2005Feb 23, 2006Avantec Technologies, Inc.Systems and methods for producing aqueous solutions and gases having disinfecting properties and substantially eliminating impurities
US20070202095 *Feb 28, 2006Aug 30, 2007Speronello Barry KChlorine dioxide based cleaner/sanitizer
US20070237707 *Sep 29, 2005Oct 11, 2007Ramanath BhatSystem and method for generation and delivery of a biocidal agent
US20090142235 *Feb 23, 2006Jun 4, 2009Avantec Technologies, Inc.Systems and methods for producing aqueous solutions and gases having disinfecting properties and substantially eliminating impurities
WO2007100531A3 *Feb 16, 2007Oct 18, 2007Basf Catalysts LlcChlorine dioxide based cleaner/sanitizer
Classifications
U.S. Classification510/281, 8/137, 8/108.1, 510/477, 8/107, 510/108, 252/187.27, 510/283, 252/187.25, 510/302
International ClassificationC11D3/395
Cooperative ClassificationC11D3/3953
European ClassificationC11D3/395D