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Publication numberUS2130505 A
Publication typeGrant
Publication dateSep 20, 1938
Filing dateApr 3, 1937
Priority dateOct 22, 1936
Publication numberUS 2130505 A, US 2130505A, US-A-2130505, US2130505 A, US2130505A
InventorsMunz Ferdinand
Original AssigneeGen Aniline Works Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Polyamino carboxylic acids and process of making same
US 2130505 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

-Patented Sept. 20, 1938 UNITED STATES PATENT OFFICE POLYAMINO CARBOXYLIC ACIDS AND PROCESS OF MAKING SAME Ferdinand Mi'mz, Fran kIort-on-the-Main, Germany, assignor to General Aniline Works, Inc., New York, N. Y., a corporation of Delaware No Drawing. original application October 22,

1936, Serial No. 107,020.

Divided and this application April 3, 1937, Serial No, 134,737. In Germany October 30, 1935 2 Claims. (cl. 260-534) This application is a division o f my copending application Ser. No. 107,020, filed October 22, 1936, which relates to the use ofamino polycarboxylic acids for avoiding and rendering 5 harmless the precipitates of water-insoluble metal salts, particularly formed owing to the hardness 1 In this manner polyamino-polycarboxylic acidsare obtained which correspond to the general formula:

noocnlc cmccon ,HOOCHC CHICOOE wherein R stands for a lower alkylene radicle.

The following example will :iurther illustrate how the said invention may be carried out in 26 practice, but the invention is not restricted to this example. The parts are by weight.

Example parts of ethylene diamine in an aqueous solution of 10% strength are mixed with 466 parts of the sodium salt of monochloracetic acid and 212 parts of sodium carbonate and the mixture is heated at to C. for 8 to 10 hours. Then v470 parts oi a hydrochloric acid of 20 B. are added. When cool an acid of the formula:

11000-1110 CHIGOOH N-CH -Clzh-N' HUGO-Hi0 011.0001: 10

precipitates, which is scarcely soluble in water and may be recrystallized from water.

I claim: d i 1. Polyamino polycarboxylicacids correspond:

ing to the formula: ll

noocmc cmcoon N v noocmc cmcoon wherein It stands for a lower alkylene' radicle.

2. A polycarboxylic acid of the formula;

aooc-mc omccon n-cm-cmnoes-mo which is scarcely soluble in water and may be recrystallized rrom water.

r'aanmann Mimz.

omcoon 25

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2532391 *Mar 15, 1947Dec 5, 1950Frederick C BersworthAlkylene polyamine derivatives
US2583890 *Apr 8, 1946Jan 29, 1952Uetikon Chem FabQuantitative determination of metals
US2583891 *Nov 13, 1950Jan 29, 1952Uetikon Chem FabQuantitative determination of metals
US4560516 *Jan 31, 1985Dec 24, 1985Ciba-Geigy CorporationProcess for the production of ethylenediamine tetraacetonitrile
US5208369 *May 31, 1991May 4, 1993The Dow Chemical CompanyDegradable chelants having sulfonate groups, uses and compositions thereof
US5258141 *Jan 26, 1993Nov 2, 1993The Dow Chemical CompanyDemetallization, desulfurization, detergents
US5389594 *Oct 12, 1993Feb 14, 1995The Dow Chemical CompanyUsed in detergents, herbicides, water treatment, cleaning products
US5447575 *Aug 12, 1994Sep 5, 1995The Dow Chemical CompanyCleaning surfaces with carboxy amine groups
U.S. Classification562/566
Cooperative ClassificationC07C227/02