Title:
ARYLALKYLSULFONIC ACIDS AND METHODS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2003/014070
Kind Code:
A1
Abstract:
This invention relates new and improved processes for the preparation of arylalkylsulfonic acids derived from aromatic or substituted aromatic molecules and AOS acid (generally a mixture of alkenesulfonic acid and sultones, produced from the sulfonation of alpha olefins) and to cleaning compositions comprising said arylalkylsulfonic acids. The invention involves the use of a superacid catalyst to effectuate the conversion of AOS acid and aromatic reactants to arylalkylsulfonic acid under substantially anhydrous conditions, whereby a substantial improvement in the rate of conversion of the reactants to arylalkylsulfonic acid and/or improvement in mono-alkylation selectivity is realized, as compared to methods of preparation previously disclosed. Also useful as an alkylation promoter is the arylalkylsulfonic acid reaction product itself, produced in situ or from a previous reaction (i.e., a self-catalyst heel). The new processes generally afford arylalkylsulfonic acids with substantially improved conversion yields, highly desirable lighter color, and reduced odor, as compared to previously known methods. The acids produced by the inventive process may be neutralized to form arylalkylsulfonates (i.e., a neutralized form of the acid) which are useful in a variety of end use applications as surfactants and/or emulsifiers.
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Inventors:
DADO GREGORY P (US)
BERNHARDT RANDAL H (US)
BERNHARDT RANDAL H (US)
Application Number:
PCT/US2002/024562
Publication Date:
February 20, 2003
Filing Date:
August 02, 2002
Export Citation:
Assignee:
STEPAN CO (US)
DADO GREGORY P (US)
BERNHARDT RANDAL H (US)
DADO GREGORY P (US)
BERNHARDT RANDAL H (US)
International Classes:
C07C303/22; C11D1/22; C07C309/24; (IPC1-7): C07C309/01; C07C309/02; C07C309/09; C11D1/12
Foreign References:
| US5523469A | 1996-06-04 | |||
| US5069810A | 1991-12-03 | |||
| US4415504A | 1983-11-15 |
Other References:
DATABASE CAPLUS [online] CHEM. ABSTRACTS (COLUMBUS, OHIO, USA); VANDONI ET AL.: "Synthetic detergents behavior in the agricultural oil", XP002162361, accession no. STN Database accession no. 79-125240
DATABASE CAPLUS [online] CHEM. ABSTRACTS (COLUMBUS, OHIO, USA); MUTH C.W.: "Synthesis of polysulfonates for enhanced oil recovery by chemical flooding", XP002957421, accession no. STN Database accession no. 95:64683
See also references of EP 1419142A4
DATABASE CAPLUS [online] CHEM. ABSTRACTS (COLUMBUS, OHIO, USA); MUTH C.W.: "Synthesis of polysulfonates for enhanced oil recovery by chemical flooding", XP002957421, accession no. STN Database accession no. 95:64683
See also references of EP 1419142A4
Attorney, Agent or Firm:
Crawford, Brad (300 South Wacker Drive Suite 320, Chicago IL, US)
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