Patent US4385008A successfully refreshed from Google Patents.
US4385008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleaching agent
Assignee: Solvay Interox Ltd
•
Filing: 1980-10-02
•
Granted: 1983-05-24
•
Expires: 2000-10-02
Abstract
Abstract The present invention relates to the provision in solid form of the magnesium salt of certain aromatic, cycloaliphatic or conjugated aliphatic compounds containing a peroxycarboxylic acid group and a carboxylate group, and optionally also an alkyl, carboxylate, sulphonate, nitro, chloro or bromo group, which can be employed as bleaching agents. One especially referred example is magnesium monoperoxyphthalate having the formula: ##STR1## The invention also provides processes for the preparation of the salts, by reaction between a magnesium compound and the organic peroxyacid/carboxylate compound in a solvent from which the salt precipitates, the latter preferably being obtained by reaction between hydrogen peroxide and the corresponding anhydride under controlled reaction conditions of temperature and reagent ratios. The invention further provides desensitized compositions and washing compositions containing the bleaching agents and processes for washing or bleaching, employing them, preferably at from ambient to 60° C.
Inventors
- 👤 Geoffrey J. Hignett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:10
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3945; C07; C07C; C07C407/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
177 words
In solid form, the magnesium salt of: Class (1) an aromatic carbocyclic compound substituted around the aromatic nucleus by a carboxylate group and a peroxycarboxylic acid group both groups being derivable from the corresponding aromatic carbocyclic anhydride by reaction with hydrogen peroxide, said aromatic carboxylic compound optionally being further substituted by at least one of the groups selected from alkyl, carboxylate, sulphonate, nitro, chloro and bromo groups or Class (2) a cycloaliphatic compound substituted around the cycloaliphatic nucleus by a carboxylate group and a peroxycarboxylic acid group both groups being derivable from the corresponding cycloaliphatic carbocyclic anhydride by reaction with hydrogen peroxide, said cycloaliphatic carboxylic compound optionally being further substituted by at least one of the groups selected from alkyl, carboxylate, sulphonate, nitro, chloro and bromo groups or Class (3) compounds other than those in class 1 in which the carbonyl group of the peroxycarboxylic acid substitutent is conjugated with the carbonyl group of a carboxylate substituent via olefinic unsaturation which carboxylate and peroxycarboxylic acid substituents are derivable from the coresponding anhydride by reaction with hydrogen peroxide.
Claim 2
Dependent Claim
177 words
In solid form, the magnesium salt of: Class (1) an aromatic carbocyclic compound substituted around the aromatic nucleus by a carboxylate group and a peroxycarboxylic acid group both groups being derivable from the corresponding aromatic carbocyclic anhydride by reaction with hydrogen peroxide, said aromatic carboxylic compound optionally being further substituted by at least one of the groups selected from alkyl, carboxylate, sulphonate, nitro, chloro and bromo groups or Class (2) a cycloaliphatic compound substituted around the cycloaliphatic nucleus by a carboxylate group and a peroxycarboxylic acid group both groups being derivable from the corresponding cycloaliphatic carbocyclic anhydride by reaction with hydrogen peroxide, said cycloaliphatic carboxylic compound optionally being further substituted by at least one of the groups selected from alkyl, carboxylate, sulphonate, nitro, chloro and bromo groups or Class (3) compounds other than those in class 1 in which the carbonyl group of the peroxycarboxylic acid substitutent is conjugated with the carbonyl group of a carboxylate substituent via olefinic unsaturation which carboxylate and peroxycarboxylic acid substituents are derivable from the coresponding anhydride by reaction with hydrogen peroxide.
Claim 3
Dependent Claim
30 words
A salt according to claim 1 characterised in that the aromatic nucleus in Class 1 is a benzene nucleus and the cycloaliphatic nucleus in class (2) is a cyclohexane nucleus.
Claim 4
Dependent Claim
14 words
A salt according to claim 2 characterised in that it has the formula ##STR3##
Claim 5
Dependent Claim
9 words
A salt according to claim 3 in hydrated form.
Claim 6
Dependent Claim
23 words
A salt according to claim 1 selected from the group consisting of magnesium monoperoxymaleate, magnesium monoperoxycitraconate and magnesium salt of cyclohexane 1-carboxylate-2-monoperoxycarboxylic acid.
Claim 7
Dependent Claim
122 words
A process for the production of magnesium salts comprising the steps of (1) forming a reaction mixture consisting essentially of (a) an organic acid containing a carboxylic acid group and peroxycarboxylic acid group or anion of said organic acid according to class 1, 2 or 3 described in claim 1 herein; (b) a magnesium compound which is a base relative to the carboxylic acid group of said organic acid; and (c) a solvent from which the resultant salt produced in the process precipitates, (ii) maintaining the reaction mixture at a temperature of not more than 30° C. until at least some magnesium salt of the organic acid has precipitated therefrom and (iii) separating the precipitated magnesium salt from the spent reaction mixture.
Claim 8
Dependent Claim
18 words
A process according to claim 6 characterised in that the solvent is a low molecular weight aliphatic ester.
Claim 9
Dependent Claim
62 words
A process according to claim 6 wherein the compound in class 1, 2 or 3 is obtained by reaction between hydrogen peroxide and the corresponding anhydride, in the course of which reaction the anhydride linkage is oxidatively cleaved to generate the peroxyacid group and the carboxylate group and the other substituents of the anhydride, if any, remain in the same relative positions.
Claim 10
Dependent Claim
23 words
A process according to claim 8 wherein hydrogen peroxide and the anhydride are reacted in a mole ratio of from 1:1 to 2:1.
Claim 11
Dependent Claim
24 words
A process according to claim 9 the wherein hydrogen peroxide and the anhydride are reacted in a mole ratio of from 1.01:1 to 1.2:1.
Claim 12
Dependent Claim
40 words
A process according to claims 8 or 10 wherein the hydrogen peroxide is employed as an aqueous solution having a concentration of 40 to 60% by weight hydrogen peroxide based upon the total amount of hydrogen peroxide and water introduced.
Claim 13
Dependent Claim
32 words
A process according to claims 8 9 or 10 wherein the amount of aqueous hydrogen peroxide solution employed is less than the amount at which it forms an emulsion with the solvent.
Claim 14
Dependent Claim
40 words
A process according to claim 8 characterised in that the reaction temperature is maintained at not more than 15° C. during the period when the anhydride and hydrogen peroxide are brought into contact, and for up to 15 minutes thereafter.
Claim 15
Dependent Claim
22 words
A process according to claim 6 characterised in that the magnesium compound employed is magnesium oxide, hydroxide, carbonate or a basic carbonate.
Claim 16
Dependent Claim
12 words
A process according to claim 8 wherein the anhydride is phthalic anhydride.
Claim 17
Dependent Claim
57 words
A process according to claims 6, 8 or 15 characterised in that the mole ratio of the magnesium compound to the organic acid/anion introduced as such or generated in situ from the corresponding anhydride is from 1:2 to 1.2:2 in which to represent the number of carboxylate groups in the organic acid/anion are formed from the anhydride.
Claim 18
Dependent Claim
28 words
A process according to claim 6 characterised in that the reaction between the magnesium compound and the organic acid/anion is carried out at from 15° to 30° C.
Claim 19
Dependent Claim
22 words
A process according to claim 17 characterised in that reaction period at 15° to 30° C. is from 0.5 to 5 hours.
Claim 20
Dependent Claim
37 words
A process according to claims 8, 12 or 14 characterised in that the aqueous hydrogen peroxide and solvent are mixed to form an homogeneous phase into which is introduced the anhydride and magnesium compound, sequentially or simultaneously.
Claim 21
Dependent Claim
66 words
A process according to claim 8 characterised by separating the solid magnesium salt from the liquid phase, at the end of the reaction period, determining as necessary the residual contents of anhydride, monoperoxy acid, hydrogen peroxide and magnesium compound in the liquid phase and recycling the liquid phase for reaction in a subsequent cycle after make-up of the reagents, taking into account the aforementioned residual contents.
Claim 22
Dependent Claim
57 words
A process according to claim 20 characterised in that the reagents are introduced during make-up in the mole ratio of magnesium compound to anhydride of from 5:4 to 4:5 and hydrogen peroxide to anhydride of from 1.1:1 to 1.3:1, the anhydride being added in an amount of from 0.35 to 0.75 moles per 1000 g reaction mixture.
Claim 23
Dependent Claim
16 words
A process according to claims 20 or 21 characterised in that the anhydride is phthalic anhydride.
References Cited (Backward Citations)
US2813896A
Cited
CH363329A
Cited
US2839470A
Cited
US3076852A
Cited
US3232979A
Cited
US3247244A
Cited
GB1041983A
Cited
GB1112778A
Cited
US3510512A
Cited
GB1156240A
Cited
US3494787A
Cited
US3639285A
Cited
US3929875A
Cited
US4154695A
Cited
US4225451A
Cited
FR2332322A1
Cited
US4288388A
Cited
US4134850A
Cited
US4060535A
Cited
US4178300A
Cited
US4294717A
Cited
US4259201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |