EP0148148A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Production of sodium alkanoyloxybenzene sulfonate
Assignee: Monsanto Co
•
Filing: 1984-12-20
•
Granted: —
•
Expires: 2004-12-20
Abstract
Abstract A process is provided for preparing sodium alkanoyloxybenzene sulfonate by the reaction of anhydrous sodium phenol sulfonate with an alkanoylhalide in the substantial absence of solvent or inert reaction medium. The sodium alkanoyloxybenzene sulfonates are useful in detergents.
Inventors
- 👤 Gary James Lynch
- 👤 Chung Yu Shen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 07:58
CPC Classifications
C; C07; C07C; C07C309/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
42 words
A process for preparing sodium alkanoyloxybenzene sulfonate which comprises reacting substantially anhydrous sodium phenol sulfonate with an alkanoylhalide at a temperature in the range of about 90 0 C to about 200°C in the substantial absence of solvent or inert reaction medium.
Claim 2
Dependent Claim
42 words
A process for preparing sodium alkanoyloxybenzene sulfonate which comprises reacting substantially anhydrous sodium phenol sulfonate with an alkanoylhalide at a temperature in the range of about 90 0 C to about 200°C in the substantial absence of solvent or inert reaction medium.
Claim 3
Dependent Claim
14 words
The process of Claim 1 wherein the reaction is conducted under substantially anhydrous conditions.
Claim 4
Dependent Claim
14 words
The process of Claim 2 wherein the alkanoylhalide is C6-C12 alkanoylchloride or mixtures thereof.
Claim 5
Dependent Claim
18 words
The process of Claim 3 wherein the temperature is in the range of about 120°C to about 160°C.
Claim 6
Dependent Claim
17 words
The process of Claim 4 wherein the reaction is conducted with a stoichiometric excess of the alkanoylchloride.
Claim 7
Dependent Claim
13 words
The process of Claim 5 wherein the alkanoylchloride is octanoyl or nonanoyl chloride.
Claim 8
Dependent Claim
50 words
A slurry process for preparing sodium alkanoyloxybenzene sulfonate which comprises mixing under substantially anhydrous reaction conditions sodium para-phenol sulfonate with at least twice the stoichiometric amount of alkanoylhalide at a temperature in the range of about 90°C to about 200°C in the substantial absence of solvent or inert reaction medium.
Claim 9
Dependent Claim
50 words
A slurry process for preparing sodium alkanoyloxybenzene sulfonate which comprises mixing under substantially anhydrous reaction conditions sodium para-phenol sulfonate with at least twice the stoichiometric amount of alkanoylhalide at a temperature in the range of about 90°C to about 200°C in the substantial absence of solvent or inert reaction medium.
Claim 10
Dependent Claim
16 words
The proess of Claim7 wherein the temperature is in the range of about 120°C to 160°C.
Claim 11
Dependent Claim
18 words
The process of Claim 8 wherein the alkanoylhalide is C 6 - C 12 alkanoylchloride or mixtures thereof.
Claim 12
Dependent Claim
14 words
The process of Claim 9 wherein the alkanoylchloride is octanoyl chloride or nonanoyl chloride.
Claim 13
Dependent Claim
51 words
A semi-dry process for producing sodium alkanoyloxybenzene sulfonate which comprises mixing under substantially anhydrous reaction conditions sodium para-phenol sulfonate with about 5% to about 20% stoichiometric excess of alkanoylhalide at a temperature in the range of about 90°C to about 200°C in the substantial absence of solvent or inert reaction medium.
Claim 14
Dependent Claim
51 words
A semi-dry process for producing sodium alkanoyloxybenzene sulfonate which comprises mixing under substantially anhydrous reaction conditions sodium para-phenol sulfonate with about 5% to about 20% stoichiometric excess of alkanoylhalide at a temperature in the range of about 90°C to about 200°C in the substantial absence of solvent or inert reaction medium.
Claim 15
Dependent Claim
18 words
The process of Claim 11 wherein the alkanoylhalide is C 6 - C 12 alkanoylchloride or mixtures thereof.
Claim 16
Dependent Claim
18 words
The process of Claim 12 wherein the temperature is in the range of about 120°C to about 160°C.
Claim 17
Dependent Claim
13 words
The process of Claim 13 wherein the alkanoylchloride is octanoyl or nonanoyl chloride.
Claim 18
Dependent Claim
40 words
The process of Claim 13 wherein the reaction is conducted stepwise by adding to the sodium para-phenol sulfonate with sufficient agitation the alkanoylchloride in two or more proportions at sufficient time intervals to maintain a substantially dry flowable reaction mass.
Claim 19
Dependent Claim
13 words
The process of Claim 15 wherein the alkanoylchloride is added in three proportions.
Claim 20
Dependent Claim
11 words
The process of Claim 15 wherein the alkanoylchloride is nonanoyl chloride.
Claim 21
Dependent Claim
11 words
The process of Claim 15 wherein the alkanoylchloride is octanoyl chloride.
Claim 22
Dependent Claim
21 words
The process of Claim 15 wherein the time intervals are in the range of about 10 minutes to about 30 minutes.
Claim 23
Dependent Claim
13 words
The process of Claim 19 wherein the alkanoylchloride is octanoyl or nonanoyl chloride.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.