US4131534A
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Preparation of carrier ampholyte mixtures
Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV
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Filing: 1977-12-14
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Granted: 1978-12-26
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Expires: 1997-12-14
Abstract
Abstract Carrier ampholyte mixtures are prepared by reaction between organic amino imino compounds and unsaturated carboxylic acid esters followed by hydrolysis.
Inventors
- 👤 Wilhelm Just
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:56
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44756; G01N27/44795; B; B01; B01D; B01D57/00; B01D57/02; G01N27/44704; G01N27/44747
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
108 words
A process for the synthesis of a carrier ampholyte mixture which comprises first reacting at least one organic compound substituted with at least two amino or imino groups and at least one unsaturated carboxylic acid ester containing an activated double bond in an anhydrous organic solvent at a temperature of from about 0° C to 50° C to produce a mixture of amino-carboxylic acid esters and thereafter hydrolyzing the esters to produce a mixture of amino-carboxylic acids; the carboxylic acid moiety of the unsaturated carboxylic acid ester being aliphatic and containing up to 12 carbon atoms; the ester moiety being aliphatic and containing up to 6 carbon atoms.
Claim 2
Dependent Claim
108 words
A process for the synthesis of a carrier ampholyte mixture which comprises first reacting at least one organic compound substituted with at least two amino or imino groups and at least one unsaturated carboxylic acid ester containing an activated double bond in an anhydrous organic solvent at a temperature of from about 0° C to 50° C to produce a mixture of amino-carboxylic acid esters and thereafter hydrolyzing the esters to produce a mixture of amino-carboxylic acids; the carboxylic acid moiety of the unsaturated carboxylic acid ester being aliphatic and containing up to 12 carbon atoms; the ester moiety being aliphatic and containing up to 6 carbon atoms.
Claim 3
Dependent Claim
27 words
A process according to claim 1 wherein the first reaction is carried out by adding increasing concentrations of one reactant to decreasing concentrations of the other reactant.
Claim 4
Dependent Claim
30 words
A process according to claim 1 wherein the reaction is carried out by maintaining the concentration of one reactant constant while adding increasing or decreasing concentrations of the other reactant.
Claim 5
Dependent Claim
18 words
A process as in claim 1 wherein the solvent is an alcohol containing up to four carbon atoms.
Claim 6
Dependent Claim
22 words
A process according to claim 1 wherein the organic compound is selected from the group consisting of diethylenetriamine, triethylenetetramine, tetraethylenepentamine and pentaethylenehexamine.
Claim 7
Dependent Claim
30 words
A process according to claim 1 wherein the ester is an ester of an acid selected from the group consisting of acrylic, methacrylic, methylenemalonic, ethylenemalonic, crotonic, maleic, fumaric, and itaconic.
Claim 8
Dependent Claim
30 words
A process according to claim 1 wherein the ester moiety contains an alkyl group selected from the group consisting of methyl, ethyl, propyl, isopropyl, n-butyl, sec. butyl and tert. butyl.
Claim 9
Dependent Claim
23 words
A process according to claim 1 wherein at least two organic compounds substituted with at least two amino or imino groups are employed.
Claim 10
Dependent Claim
16 words
A process according to claim 1 wherein at least two unsaturated carboxylic acid esters are employed.
Claim 11
Dependent Claim
40 words
A process according to claim 1 wherein the first reaction is conducted by initially preparing several fractions containing different ratios of each reactant and thereafter contacting the several fractions at a temperature of from about 0° C to 50° C.
Claim 12
Dependent Claim
29 words
A process according to claim 1 wherein the solvent is selected from the group consisting of benzene and methyl, ethyl, propyl, isopropyl, n-butyl, sec. butyl and tert. butyl alcohols.
Claim 13
Dependent Claim
16 words
A process according to claim 1 wherein the reaction temperature is from 0 to 40° C.
Claim 14
Dependent Claim
33 words
A process according to claim 1 wherein the hydrolyzed mixture is decolorized by hydrogenation utilizing a catalyst selected from the group consisting of raney nickel, platinum oxide, palladium, and palladium in activated carbon.
Claim 15
Dependent Claim
30 words
A process according to claim 1 wherein the hydrolyzed mixture is decolorized by hydrogenation utilizing a hydride selected from the group consisting of lithium aluminum hydride and sodium boron hydride.
Claim 16
Dependent Claim
83 words
An amino-carboxylic acid ester mixture comprising the reaction product of at least one organic compound substituted with at least two amino or imino groups and at least one unsaturaged carboxylic acid ester containing an activated double bond in an anhydrous organic solvent at a temperature from about 0° C to 50° C; the carboxylic acid moiety of the unsaturated carboxylic acid ester being aliphatic and containing up to 12 carbon atoms; the ester moiety being aliphatic and containing up to 6 carbon atoms.
Claim 17
Dependent Claim
83 words
An amino-carboxylic acid ester mixture comprising the reaction product of at least one organic compound substituted with at least two amino or imino groups and at least one unsaturaged carboxylic acid ester containing an activated double bond in an anhydrous organic solvent at a temperature from about 0° C to 50° C; the carboxylic acid moiety of the unsaturated carboxylic acid ester being aliphatic and containing up to 12 carbon atoms; the ester moiety being aliphatic and containing up to 6 carbon atoms.
Claim 18
Dependent Claim
21 words
A product of claim 15 wherein the organic compound is selected from the group consisting of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine.
Claim 19
Dependent Claim
29 words
A product of claim 15 wherein the ester is an ester of an acid selected from the group consisting of acrylic, methacrylic, methylenemalonic, ethylenemalonic, crotonic, maleic, fumaric, and itaconic.
Claim 20
Dependent Claim
29 words
A product of claim 15 wherein the ester moiety contains an alkyl group selected from the group consisting of methyl, ethyl, propyl, isopropyl, n-butyl, sec. butyl, and tert. butyl.
Claim 21
Dependent Claim
14 words
A product of claim 15, having a molecular weight up to 20,000 and more.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |