US3923679A - Salts of tetrahydrofuran polycarboxylic acids as detergent builders and complexing agents - Google Patents

Salts of tetrahydrofuran polycarboxylic acids as detergent builders and complexing agents Download PDF

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US3923679A
US3923679A US47682574A US3923679A US 3923679 A US3923679 A US 3923679A US 47682574 A US47682574 A US 47682574A US 3923679 A US3923679 A US 3923679A
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salt
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tetrahydrofuran
hexacarboxylate
trans
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John N Rapko
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Monsanto Co
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    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/20Organic compounds containing oxygen
    • C11D3/2096Heterocyclic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/04Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D307/18Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D307/24Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen

Abstract

Salts of tetrahydrofuran polycarboxylic acids represented by the formula

wherein R1, R2, R3, R4 and R5 are hydrogen or carboxylic acid groups, at least one of R1, R2, R3 and R4 being a carboxylic acid group when R5 is a carboxylic acid group are useful as complexing agents and/or detergency builders. The ester forms of such compounds, as well as the acids are useful as intermediates for production of the salts.

Description

ESE-99 United States Patent 191 Rapko 1 SALTS OF TETRAI-IYDROFURAN POLYCARBOXYLIC ACIDS AS DETERGENT BUILDERS AND COMPLEXING AGENTS Related U.S. Application Data Division of Ser. No. 385,131, Aug. 2, 1973, Pat. No. 3,835.163.

[75] Inventor:

[52] US. Cl. 259/99; 252/89; 252/97;

252/132; 252/135; 252/180; 252/DIG. 11 Int. Cl. CllD 7/54 Field of Search 252/89, 97, 99, 132. 135.

252/180, DIG. 11; 260/3473, 347.5

[56] References Cited UNITED STATES PATENTS 5/1971 Yang 252/135 1/1972 Lamberti et a1. 252/132 X 6/1974 Shen ..252/89 8/1974 Robinson ..252/89 Primary E.raminerThomas J. Herbert, Jr. Assistant Examiner-Bruce H. Hess Attorney, Agent, or Firm-Neal E. Willis; John E. Maurer; Thomas N. Wallin [57] ABSTRACT Dec. 2, 1975 Salts of tetrahydrofuran polycarboxylic acids represented by the formula 0 nooc coon nooc I R wherein R R R;,, R, and R are hydrogen or carboxylic acid groups, at least one of R R R and R being a carboxylic acid group when R, is a carboxylic acid group are useful as complexing agents and/or detergency builders. The ester forms of such compounds, as well as the acids are useful as intermediates for production of the salts.

I6 Claims, No Drawings SALTS OF TETRAHYDROFURAN POLYCARBOXYLIC ACIDS AS DETERGENT BUILDERS AND COMPLEXING AGENTS filed Aug. 2. 1973, now US. Pat. No 3,835,163.

BACKGROUND OF THE INVENTION This invention relates to novel tetrahydrofuran polycarboxylic acids and salts useful as complexing agents and detergency builders; to detergent formulations containing such compounds and to ester forms of such compounds useful, inter alia, as intermediates for preparation of the salts and acids.

The utility of compounds characterized by the ability to complex various metal and alkaline earth metal ions (particularly ions such as calcium ions which contribute to hardness" of water) in aqueous media and/or provide, in combination with various detergent surfactants, detergent formulations of enhanced cleansing ability is well recognized by those skilled in the art. Such compounds are used in water treating applications (e.g. to soften water) and/or as detergency builders.

Although many compounds having complexing and- /or detergency builder functionality are known the provision of novel compounds composed of only carbon, hydrogen and oxygen and having such functionality is desirable.

Since most known complexing agents form complexes with water hardness ions on a 1:1 mole basis, novel compounds having the ability to complex greater quantities of such ions are particularly desired.

SUMMARY OF THE INVENTION It is an object of this invention to provide novel compounds useful as complexing agents and/or detergency builders and intermediates for the synthesis of such compounds. A further object of the invention is to provide novel detergent formulations containing the builder compounds of this invention.

The compounds of this invention are tetrahydrofuran polycarboxylic acids, their salts and esters whose struc-- ture, synthesis, and use will be understood from the following description of the preferred embodiments.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The compounds of the present invention are repre- This is a division of application Ser. No. 385,131, 5 sented by the formula o xooc coox xooc R wherein X is hydrogen, alkali metal, ammonium, alkal nol ammonium, (wherein the alkyl group contains from l to 4 carbon atoms) or an alkyl group containing from l to 20 carbon atoms (it is not necessary that all X l groups in the compound be identical) and R R R R useful as complexing agents and/or as detergency builders.

Tetrahydrofuran-2,2,3,4,5,5hexacarboxylate salts,

especially in the trans configurations and preferably the I pentasodium salts, are preferred compounds of the invention in view of their ability to complex more than j one mole of calcium ion per mole of hexacarboxylate salt.

The ester forms of the compounds of this invention are useful as intermediates for preparation of the salt forms as will be apparent from the subsequent description of methods of preparing compounds of this invention. In addition, certain of the esters (particularly those having more than 4 carbon atoms in the ester alkyl groups) will be found to exhibit plasticizer properties or, in the case of the higher alkyl (9 to 20 carbon 1 atoms) esters, surfactant properties.

The ester forms of the compounds of this invention can be prepared by reactions represented by the equations:

compound.

For example: the use of dimethyl maleate will yield a mixture of the cis and trans configurations of whereas the use of dimethyl fumarate will yield the trans form of this compound.

The use of methyl acrylate will yield COOR' l-COOCH,

The use of methylene malonic ester CH C (COO CH will yield R'OOC O COOR' t V R'OOC l COOR' H- COOCH,

l H coocn,

The use of ethene 1,1,2 trimethylcarboxylate will yield R'OOC o COOR' ROOC l \COOR' n- -ccoocu,

OOCH, OOCH,

The use of ethene 1,l,2,2 tetramethylcarboxylate COOCHJ coocH,

4 Higher esters are obtained by use of higher alkyl carboxylate esters in the reaction or by transesterifying the lower esters with the appropriate alcohol. The R in the COOR groups occupying the 2.2,5,5 positions corresponds to the R in the alcohol (R'OH) used in the second reaction.

The reaction shown in the first equation can be conveniently conducted in an inert solvent, e.g., 1,2- dibromoethane, at a temperature sufficiently high to promote a reasonable rate of reaction, e.g. about 120C in the case of dimethyl fumarate. Preferably, the reaction is conducted under reflux and a nitrogen blanket to prevent volatilization or oxidation of the reactants. The product is recovered by conventional crystallization and filtration techniques. Reactions of this general type are fully understood by those skilled in the art, and are discussed, for example, in US. Pat. No. 3,317,567.

The alcoholysis reaction shown in the second equation is preferably conducted by mixing the product of the first reaction with the requisite amount of water and alcohol cooling to about 0 to 40C; adding gaseous HCl; filtering to remove NH Cl; adding concentrated sulfuric acid as a catalyst and refluxing to complete the reaction.

The corresponding alkali metal salts are readily obtained by conventional saponiftcation techniques (using less than stoichimetrie amounts of alkali metal hydroxide if a partial salt such as the preferred pentasodium tetrahydrofuran 2,2,3,4,5,5-hexacarboxy1ate is desired). The corresponding ammonium and alkanol ammonium salts are more easily obtained by neutralization of the acid forms of the compounds of this invention.

Acidulation of the salt with a strong acid, e.g., HCl, H or a strong acid ion exchange resin, will yield the acid forms of the compounds of this invention.

The tetrahydrofuran polycarboxylate salts of this invention are useful as agents for complexing metal and- /or alkaline earth metal ions in aqueous media. The amount of polycarboxylate required to effectively complex the ions in a given system will depend, to some extent, on the particular polycarboxylate salt being used and the particular metal or alkaline earth metal ions in the aqueous media. Generally, complexing is more effective in basic solution. Optimum conditions and amounts of complexing agent can readily be determined by routine experimentation.

The tetrahydrofuran polycarboxylate salts are also useful as builders in detergent formulations. Generally, the use of the alkali metal salts, particularly the sodium salt is preferred. However, in some formulations (such as liquid formulations where greater builder solubility is required) the use of ammonium or alkanol ammonium salts may be desirable.

The detergent formulations of this invention will contain at least 1% by weight and preferably at least 5% by weight of the polycarboxylate salts of this invention. In order to obtain the maximum advantages of the builder compositions of this invention, the use of from 5 to 75% of these polycarboxylate salts is particularly preferred. The tetrahydrofurna polycarboxylic salt compounds of this invention can be the sole detergency builder or these compounds can be utilized in combination with other detergency builders which may consti tute from 0 to by weight of the total builders in the formulation. By way of example, builders which can be employed in combination with the novel builder compounds of this invention include water soluble inorganic builder salts such as alkali metal polyphosphates, i.e., the tripolyphosphates and pyrophosphates, alkali metal carbonates, borates, bicarbonates and silicates and water soluble organic builders including amino polycarboxylic acids and salts such as alkali metal nitrilotriacetates, cycloalkane polycarboxylic acids and salts, ether polycarboxylates, alkyl polycarboxylates, epoxy polycarboxylates, other tetrahydrofuran polycarboxylates such as 1,2,3,4 or 2,2,5,5 tetrahydrofuran tetracarboxylates, benzene polycarboxylates, oxidized starches, amino (trimethylene phosphonic acid) and its salts, diphosphonic acids and salts (e.g., methylene diphosphonic acid; l-hydroxy ethylidene diphosphonic acid) and the like.

The detergent formulations of this invention will generally contain from 5 to 95% by weight total builder (although greater or lesser quentities may be employed if desired) which, as indicated above, may be solely the tetrahydrofuran polycarboxylic acids and/or salts compounds of this invention or mixtures of such compounds with other builders. The total amount of builder employed will be dependent on the intended use of the detergent formulation, other ingredients of the formulation, pH conditions and the like. For example, general laundry power formulations will usually contain 20 to 60% builder; liquid dishwashing formulations 11 to 12% builder; machine dishwashing formulations 60 to 90% builder. Optimum levels of builder content as well as optimum mixtures of builders of this invention, with other builders for various uses can be determined by routine tests in accordance with conventional detergent formulation practice.

The detergent formulations of this invention will generally contain a water soluble detergent surfactant although the surfactant ingredient may be omitted from machine dishwashing formulations. Any water soluble anionic, nonionic, zwitterionic or amphoteric surfactant can be employed.

Examples of suitable anionic surfactants include soaps such as the salts of fatty acids containing about 9 to 20 carbon atoms, e.g. salts of fatty acids derived from coconut oil and tallow; alkyl benzene sulfonates-- -particularly linear alkyl benzene sulfonates in which the alkyl group contains from to 16 carbon atoms; alcohol sulfates; ethoxylated alcohol sulfates; hydroxy alkyl sulfonates; alkyl sulfates and sulfonates; monoglyceride sulfates; acid condensates of fatty acid chlorides with hydroxy alkyl sulfonates and the like.

Examples of suitable nonionic surfactants include alkylene oxide (e.g., ethylene oxide) condensates of mono and polyhydroxy alcohols, alkyl phenols, fatty acid amides, and fatty amines; amine oxides; sugar derivatives such as sucrose monopalmitate; long chain tertiary phosphine oxides; dialkyl sulfoxides; fatty acid amides, (e.g., mono or diethanol amides of fatty acids containing 10 to 18 carbon atoms), and the like.

Examples of suitable zwitterionic surfactants include derivatives of aliphatic quaternary ammonium compounds such as 3-(N,N-dimethyl-N-hexadecyl ammonio) propane-l-sulfonate and 3-(N,N-dimethyl-N- hexadecylammonio)-2-hydroxy propanel -sulfonate.

Examples of suitable amphoteric surfactants include betains, sulfobetains and fatty acid imidazole carboxylates and sulfonates.

The quantity of surfactant employed in the detergent formulations of this invention will depend on the surfactant chosen and the end use of the formulation. In general, the formulations will contain from 5 to 50% surfactant by weight, although as much as or more surfactant may be employed if desired. For example, general laundry powder formulations normally contain 5 to 50%, preferably 15 to 25% surfactant; machine dishwashing formulations 0.5 to 5%; liquid dishwashing formulations 20 to 45%. The weight ratio of surfactant to builder will generally be in the range of from 1:12 to 2:1.

In addition to builder and surfactant components, detergent formulations may contain fillers such as sodium sulfate and minor amounts of bleaches, dyes, optical brightners, soil anti-redeposition agents, perfumes and the like.

ln machine dishwashing compositions the surfactant will be a low-foaming anionic surfactant which will constitute 0 to 5% of the formulation.

The term low-foaming" surfactant connotes a surfactant which, in the foaming test described below, reduces the revolutions of the washer jet-spray arm during the wash and rinse cycles less than 15%, preferably less than 10%.

In the foaming test, 1.5 grams of surfactant is added to a 1969 Kitchen-Aid Home Dishwasher, Model No. KOS-l6, manufactured by Hobart Manufacturing Company which is provided with means for counting revolutions of the washer jet-spray arm during wash and rinse cycles. The machine is operated using distilled water feed at a machine entrance temperature of 40C. The number of revolutions of the jet-spray arm during the wash and rinse cycles is counted. The results are compared with those obtained by operation of the machine using no surfactant charge and percentage decrease in number of revolutions is determined.

The surfactant should, of course, be compatible with the chlorine containing component hereinafter discussed. Examples of suitable nonionic surfactants include ethoxylated alkyl phenols, ethoxylated alcohols (both monoand di-hydroxy alcohols), polyoxyalkylene glycols, aliphatic polyethers and the like. The widely commercially utilized condensates of polyoxypropylene glycols having molecular weights of from about 1,400 to 2,200 with ethylene oxide (the ethylene j oxide constituting 5 to 35 weight percent of the condensate) are, for example, advantageously used in the 1 machine dishwashing formulations of this invention.

Suitable low-foaming anionic surfactants include alkyldiphenyl ether sulfonates such as sodium dodecyl diphenyl ether disulfonates and alkyl naphthalene sulfonates.

Mixtures of suitable low-foaming surfactants can be utilized if desired.

ln addition. machine dishwashing formulations will :ontain sufficient chlorine providing compound to provide 0.5 to 271 available chlorine. For example. the formulation may contain from 0.5 to preferably 1 to 3'7: ofa chlorocyanurate or from to 30% chlorinated trisodium phosphate. Suitable chlorocyanurates are sodium and potassium dichlorocyanurate; [(monotrichloro) tetra-(mono potassium dichloro)l pentaisocyanurate; (ntono-trichloro) (monopotassium dichloro) di-isocyanuratc.

Machine dishwashing compositions should additionally contain from 5 to 30% soluble sodium silicate having an SiO to Na O mole ratio of from lzl to 3.2:l preferably about 2.4:l to inhibit corrosion of metal parts of dishwashing machines and provide over-glaze protection to fine china.-

. Machine dishwashing compositions will generally contain at least l0'7r. preferably at least builder. up to a maximum of about 90% builder. The new builder compounds of this invention should constitute "at least 5% of the weight of the machine dishwashing formulation in order to obtain the full effects of their jinherent characteristics.

The invention is further illustrated by the following examples which deal with the preparation and use of the particularly preferred tetrahydrofuran 2.2-trans- Q'3.4.5.S-hexacarboxylate compounds. It will be recoginized by those skilled in the art that other compounds of this invention can be prepared and utilized in a simi- =lar manner pursuant to the preceding discussion. In the .cxamples. all parts and percentages are by weight uniless otherwise indicated.

EXAMPLE I Tetracyanocthylene oxide (56.6 grants); dimethyl fumarate (56.6 grants); ethylene dibromide solvent (450 ml.) are maintained at about 120C with stirring for about 22 hottrs under nitrogen atmosphere in a glass flask fitted with a reflux condenser. A dark brown solu- "*tion forms which is filtered while hot to remove minor iamounts of unidentified solid impurities. The filtrate is idricd on a rotary evaporator and the residue washed with diethylether and dried under nitrogen. The residue product is purified by dissolution in and crystallization from methyl alcohol followed by vacuum drying. The identity of the product as dimethyl tetrahydrofurantrans-3.4-dicarboxylate-2.2.5.5.-tctranitrile is con- 'firmed by elemental analysis and a H nuclear magnetic resonance spectrum in deuteratcd acetone in which the 3 and 4 protons appear as a singlet at 5.45 ppm; the ester (H protons as a singlet at 4.10 ppm vs. TMS (rel- 'ative areas 1:3).

Ninety grams of the dimethyl tetrahydrofurantrans- 3.4-dicarboxylatc-l2.5.5-tetranitrile; 2l grams water; 1.000 ml. methyl alcohol are charged to a glass flask and the temperature of the mixture is held between 0" ;to 40C while 50 grants of hydrogen chloride gas is bublbled into the mixture. The reaction mxiture is filtered to remove ammonium chloride; [.5 ml. concentrated sulfuric acid is added as catalyst to the filtrate which is then refluxed for about hours. Upon cooling. solid product separates from the solution and is removed by filtration. The solid is dissolved in chloroform; washed with 5'1- sodiutn bicarbonate and water. The chloroform solution is dried over magnesium sulfate and the chloroform evaporated to leave an oily residue. Dissolution of the residue in methanol followed by crystallization yields a pure crystalline product. The identity of the product as hexamethyl tetrahydrofuran 2.2-trans- 3.4.5.5 hexacarboxylate is confirmed by elemental analysis and a H nuclear magnetic resonance spectrum in deuterated chloroform which exhibits a singlet at 4.50 ppm corresponding to the 3 and 4 protons; a singlet at 4.02 ppm corresponding to the two CH ester groups at the 3 and 4 positions: a singlet at 3.88 ppm corresponding to the four ester CH groups at the 2 and 5 positions (relative areas l:3:4).

EXAMPLE ll A mixture of 55.4 grams 50% sodium hydroxide; 100 ml. water; 48.5 grams hexamethyl tetrahydrofuran 2.2- trans-3.4.5.5 hcxacarboxylate is heated under reflux at C for 24 hours in a glass flask. The solution is concentrated by distillation of methanol and water from the flask. The reaction mixture is cooled to room temperature and product precipitated by addition of 1.000 ml. methanol. The identity of the product as pentasodium monohydrogcn tetrahydrofuran 2.2-trans3,4.5.5 hexacarboxylate is confirmed by chemical analysis and a H nuclear magnetic resonance spectrum in deuterium oxide exhibiting a singlet at 4.1 ppm.

EXAMPLE lll Pentasodium monohydrogen tetrahydrofuran 2.2- trans-3.4.5.5 hexacarboxylate (289.2 mg.) is dissolved in 10 ml. deionized water and passed through a column packed with a strong acid ion exchange resin (sulfonated polystyrene marketed by Fisher Scientific Company under the trademark Rexyn l0l This procedure yields tetrahydrofuran 2.2-trans-3.4.5.5 hexacarboxylic acid. The titration curve of the acid with sodium hydroxide exhibits three breaks and indicates that four protons are highly acidic (apparent pKas equal to or less than 5.7); a fifth proton is less acidic (apparent pKa of about 6.8 l; and the sixth proton has an apparent pKa of about 9.].

EXAMPLE IV Pentasodium monohydrogen tetrahydrofuran 2.2- trans-3.4.5.5 hexacarboxylate is tested for sequestration function using the procedures described by Matzner et al. Organic Builder Salts as Replacements for Sodium Tripolyphosphate" Tenside Detergents. l0. Heft 3. pages I19 through I25 (1973). In this test. the divalent ion electrode shows two separate end points for titration of calcium ion with a solution of the hexacarboxylate salt. This is due to the formation of 2:l and lzl (Ca++/ligand) complexes. The average sequestration values (intensity multiplied by capacity expressed as a percentage of sodium tripolyphosphate sequestration value are in the range of 138 to 188% depending upon the complcx formed.

EXAMPLE Detergent formulations containing the percent builder shown in Table l below: l7% linear alkylbenzene sulfonate having an average molecular weight of about 230; l2? sodium silicate: remainder. sodium sulfate are prepared. The formulations are tested by washing identically soiled fabric swatches (indicated in the 10 washing machine. Excellent cleaning is obtained and,' in particular, the glassware is found substantially free from filming and spotting.

EXAMPLE Vlll Three machine dishwashing formulations are prepared which are identical to that of Example Vll except TABLE I Cotton Fabric A Rd Polyester/Cotton Fabric Rd 50% 37.5% 25% 50% 37.5% 25% Builder Builder Builder Builder Builder Builder Builder Pentasodium monohydrogen 28.7 27.l 2L3 13.5 l0.l 9.8 tetrahydrofuran 2.2-trans-3.4.5,5-hexacarboxylate Sodium Tripolyphosphate 26.2 l9.0 l4.5 12.0 8.7 5.7

that the followin surfactants are substituted for the EXAMPLE Vl g EXAMPLE Vll A machine dishwashing formulation containing 50% pentasodium monohydrogen tetrahydrofuran 2,2- trans-3,4,5,S-hexacarboxylate; 35% of an aqueous solution containing 47% sodium silicate having an SiO, to Na O mole ratio of 2.4; 3% of a condensate of ethylene oxide with polyoxypropylene glycol marketed by Wyandotte Chemical Corporation as Pluronic L-62; 1.2% potassium dichlorocyanurate; l0.8% sodium sulfate is prepared. The formulation is used to wash soiled dishes and glassware in a conventional automatic home dishethylene oxide-polyoxypropylene glycol:

l. condensate of an internal, vicinal. linear diol having an average chain length of l6 carbon atoms with 3 molecular proportions of ethylene oxide 2. condensate of N-decanol with 2-% molecular proportions ethylene oxide 3. sodium decydiphenyl ether disulfonate. All three formulations provide excellent performance in cleaning dishes and glassware in a conventional automatic home dishwashing machine.

Other compounds of this invention can be prepared by techniques similar to those disclosed in Example I. For example, Table ll, below, indicates the esters which are obtained by reaction of various CN\ /CN CN/C v compounds with various compounds followed by alcoholysis with methanol.

TABLE ll Product tetracyano ethylene oxide tetracyano ethylene oxide tetracyano ethylene oxide tetracyano ethylene oxide trimethyl ethene-l ,l .Z-tricarboxylate tetramethyl ethene-l .l .2.2-tetracarboxylate tetracyano ethylene oxide tricyano ethylene oxide tricyano ethylene oxide ethylene tricyano ethylene oxide tricyano ethylene oxide dimethyl malonate methyl aerylate dimethyl/methylene malonate methyl acrylate dimethyl methylene malonate dimethyl fumarate tricyano ethylene oxide TABLE ll-continued CN N R, R, Product CN Y R, R

pentacarboxylate tricyano ethylene oxide dimethyl maleate tricyano ethylene oxide tetramethyl ethene-l ,l ,2.2-tetracarboxylate mixture of pentamethyl tetrahydrofurancis-2.2,3.4,5 and 2.2-cis'3A-trans-5 pentacarboxylate mixture of cis and trans-hexamethyl tetrahydrofuran-2,2,33,4,5 and 2.2.3.435 hexacarboxylate heptamethyl tetrahydrofuran-2.2.3.3,4.4.5 heptacarboxylate Acids corresponding to the esters shown in Table ll, above, and their corresponding totally or partially neutralized salts can be prepared by saponification and acidulation techniques comparable to those exemplified in Examples I! and Ill.

What is claimed is:

l. A detergent formulation comprising (a) from 1 to 95% by weight of an alkali metal, ammonium or alkanol ammonium salt of a compound represented by the formula wherein R R,, R R and R, are selected from the group consisting of hydrogen and COOH, at least one of R, R;,, R and R being COOH when R, is COOH and (b) from 0.5 to 95% by weight of a surfactant selected form the group consisting of water soluble anionic, nonionic, amphoteric and zwitterionic surfactants.

2. A formulation according to claim 1 containing from 5 to 75% of said salt.

3. A formulation according to claim 1 wherein R R and R, are COOH and R and R, are hydrogen.

4. The formulation of claim I wherein said salt is pentasodium monohydrogen tetrahydrofuran 2,2,3,4,5,5- hexacarboxylate.

5. The formulation of claim 1 wherein said salt is pentasodium monohydrogen tetrahydrofuran 2,2-trans- 3 ,4,5 ,S-hexacarboxylate.

6. The formulation of claim 1 wherein said salt is hexasodium tetrahydrofuran 2,2-trans-3,4,5,5-hexacarboxylate.

7. The formulation of claim 1 wherein said salt is hexasodium tetrahydrofuran 2,2-trans-3,4,5,5-hexacarboxylate.

8. A machine dishwashing composition comprising (a) from 0 to 5% by weight of a surfactant selected from the group consisting of low-foaming anionic and non-ionic surfactants and mixtures thereof, (b) a chlorine providing material selected from the group consisting of potassium dichlorocyanurate; sodium dichlorocyanurate; [(mono-trichloro) tetra-(monopotassium dichloro)] penta-isocyanurate; (mono-trichlor) (mono-potassium dichloro) diisocyanurate; chloriwherein R,,, R,, R R and R, are selected from the group consisting of hydrogen and COOH, at least one of R,,, R,, R, and R, being COQH when R, is COOM.

9. A formulation according to claim 8 containing from 20 to of said salt.

10. A formulation according to claim 8 wherein R,

R and R, are COOH and R, and R are hydrogen.

11. The formulation of claim 8 wherein said salt is pentasodium monohydrogen tetrahydrofuran 2,2,3,4,5,5-hexacarboxylate.

12. The formulation of claim 8 wherein said salt is pentasodium monohydrogen tetrahydrofuran 2,2,- tran's-3 ,4,5 ,5 -hexacarboxylate.

13. The formulation of claim 8 wherein said salt is hexasodium tetrahydrofuran 2,2,3,4,5,5-hexacarboxylate.

14. The formulation of claim 8 wherein said salt is hexasodium tetrahydrofuran 2.2-trans-3,4,5,5-hexacarboxylate.

15. A formulation according to claim 8 containing at least 0.5% surfactant.

16. A method of complexing ions selected from the group consisting of metal ions and alkaline earth metal ions in an aqueous medium containing said ions by providing in said aqueous medium a quantity of an alkali metal, ammonium or alkanol ammonium salt of a compound represented by the formula sufficient to form complexes with said ions.

Mum p 7Q- 7 7 1 2 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION PATENT NO. 3,923,679

DATED 3 December 2, 1975 INVENTOR(5) 3 John N. RapkO It is certified that error appears in the above-identified patent and that said Letters Patent amhamymnamdasmwnmmw Column 2, line 48, last structure of Equation 1:

"NC 0 CN" NC 0 CN should be NC 1 Y NC Y v v R T R R' R 2 3 Columns 9 and 10, Table I, first line:

"Cotton Fabric ARd Polyester/Cotton Fabric Rd" should be Cotton Fabric A Rd Polyester/Cotton Fabric Column 12, line 62, O

O HOOC C/\C c on HO0C \\R W"? Rd Pg. 20f2 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION PATENT NO. 3,923,679 DATED December 2, 1975 INVENTOR(S) John N. Rapko It is certified that error appears in the abbve-identtfied patent and that said Letters Patent are hereby corrected as shown below:

should be nooc coon nooc R a l ('2 d b c Signed and Sealed this A ttest:

RUTH C. MASON C. MARSHALL DANN Arremng Officer ommissiuner ofParenls and Trademark:

Claims (16)

1. A DETERGENT FORMULATION COMPRISING (A) FROM 1 TO 95% BY WEIGHT OF AN ALKALI METAL, AMMONIUM OR ALKANOL AMMONIUM SALT OF A COMPOUND REPRESENTED BY THE FORMULA
2. A formulation according to claim 1 containing from 5 to 75% of said salt.
3. A formulation according to claim 1 wherein Ra, Rd and Re are COOH and Rb and Rc are hydrogen.
4. The formulation of claim 1 wherein said salt is pentasodium monohydrogen tetrahydrofuran 2,2,3,4,5,5-hexacarboxylate.
5. The formulation of claim 1 wherein said salt is pentasodium monohydrogen tetrahydrofuran 2,2-trans-3,4,5,5-hexacarboxylate.
6. The formulation of claim 1 wherein said salt is hexasodium tetrahydrofuran 2,2-trans-3,4,5,5-hexacarboxylate.
7. The formulation of claim 1 wherein said salt is hexasodium tetrahydrofuran 2,2-trans-3,4,5,5-hexacarboxylate.
8. A machine dishwashing composition comprising (a) from 0 to 5% by weight of a surfactant selected from the group consisting of low-foaming anionic and non-ionic surfactants and mixtures thereof, (b) a chlorine providing material selected from the group consisting of potassium dichlorocyanurate; sodium dichlorocyanurate; ((mono-trichloro) tetra-(monopotassium dichloro)) penta-isocyanurate; (mono-trichlor) (mono-potassium dichloro) diisocyanurate; chlorinated trisodium phosphate, said chlorine providing material being present in an amount sufficient to provide from 0.5 to 2% by weight available chlorine, (c) from 5 to 30% by weight soluble sodium silicate having an SiO2 to Na2O mole ratio of from 1:1 to 3.2:1 and (d) from 5 to 90% by weight of an alkali metal, ammonium or alkanol ammonium salt of a compound represented by the formula
9. A formulation according to claim 8 containing from 20 to 75% of said salt.
10. A formulation according to claim 8 wherein Ra, Rd and Re are COOH and Rb and Rc are hydrogen.
11. The formulation of claim 8 wherein said salt is pentasodium monohydrogen tetrahydrofuran 2,2,3,4,5,5-hexacarboxylate.
12. The formulation of claim 8 wherein said salt is pentasodium monohydrogen tetrahydrofuran 2,2,-trans-3,4,5,5-hexacarboxylate.
13. The formulation of claim 8 wherein said salt is hexasodium tetrahydrofuran 2,2,3,4,5,5-hexacarboxylate.
14. The formulation of claim 8 wherein said salt is hexasodium tetrahydrofuran 2,2-trans-3,4,5,5-hexacarboxylate.
15. A formulation according to claim 8 containing at least 0.5% surfactant.
16. A method of complexing ions selected from the group consisting of mEtal ions and alkaline earth metal ions in an aqueous medium containing said ions by providing in said aqueous medium a quantity of an alkali metal, ammonium or alkanol ammonium salt of a compound represented by the formula
US3923679A 1973-08-02 1974-06-06 Salts of tetrahydrofuran polycarboxylic acids as detergent builders and complexing agents Expired - Lifetime US3923679A (en)

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US3835163A US3835163A (en) 1973-08-02 1973-08-02 Tetrahydrofuran polycarboxylic acids
US3923679A US3923679A (en) 1973-08-02 1974-06-06 Salts of tetrahydrofuran polycarboxylic acids as detergent builders and complexing agents

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US3835163A US3835163A (en) 1973-08-02 1973-08-02 Tetrahydrofuran polycarboxylic acids
US3923679A US3923679A (en) 1973-08-02 1974-06-06 Salts of tetrahydrofuran polycarboxylic acids as detergent builders and complexing agents
DE19742437167 DE2437167C2 (en) 1973-08-02 1974-08-01
BE147194A BE818381A (en) 1973-08-02 1974-08-01 Compounds and formulations for detergency
FR7426824A FR2239465B3 (en) 1973-08-02 1974-08-01
NL7410341A NL7410341A (en) 1973-08-02 1974-08-01 Tetrahydrofuranpolycarbonzuren and salts
GB3396174A GB1436292A (en) 1973-08-02 1974-08-01 Tetrahydrofuran polycarboxylates and their use in detergent formulations

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Also Published As

Publication number Publication date Type
BE818381A (en) 1975-02-03 grant
NL7410341A (en) 1975-02-04 application
FR2239465A1 (en) 1975-02-28 application
US3835163A (en) 1974-09-10 grant
BE818381A1 (en) grant
DE2437167A1 (en) 1975-02-13 application
DE2437167C2 (en) 1982-06-09 grant
FR2239465B3 (en) 1977-06-03 grant
GB1436292A (en) 1976-05-19 application

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