Dimeric alcohol-bis and trimeric alcohol-tris-sulphates and ethe

Details Dimeric alcohol-bis and trimeric alcohol-tris-sulphates and ethe Dimeric alcohol-bis and trimeric alcohol-tris-sulphates and ethe

1997-10-01

1999-07-13

Kopec, Mark

Cleaning compositions for solid surfaces, auxiliary compositions

Cleaning compositions or processes of preparing

Liquid composition

558 20, 558 38, 558 44, 558 34, 510127, 510290, 510351, 510352, 510357, 510358, 510414, 510424, 510429, 510495, 510498, C11D 112, C11D 129

Patent

active

059226706

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
This invention relates to dimer alcohol bis- and trimer alcohol tris-sulfates and ether sulfates, to a process for their production by reaction of dimer and trimer alcohols with sulfating agents and subsequent neutralization and to their use as surface-active substances and as liquefiers for pastes.


DISCUSSION OF RELATED ART

2. Prior Art
Gemini surfactants are compounds which have two hydrophilic groups and two hydrophobic groups per molecule. These groups are generally separated from one another by a so-called spacer. This spacer is usually a carbon chain which should be long enough to create a sufficient distance between the hydrophilic groups for them to be able to act independently of one another (cf. M. Rosen, Chemtech (1993), pages 20 et seq; F. Menger, C. A. Littau, J. Am. Chem. Soc. 115 (1993), pp. 10083 et seq).
The surfactants described in the cited literature references are distinguished by an unusually low critical micelle concentration and by their ability drastically to reduce the surface tension of water. Unfortunately, these surfactants are difficult to synthesize and, in some cases, can only be obtained by multistage syntheses. The complicated synthesis pathways inevitably lead to relatively high costs which is a disadvantage for application and use on an industrial scale.
The problem addressed by the present invention was to provide a process for the production of new Gemini surfactants which would enable these surfactants to be simply and inexpensively obtained in high yields.


DESCRIPTION OF THE INVENTION

The present invention relates to dimer alcohol bis-sulfates and trimer alcohol tris-sulfates and ether sulfates which are obtainable by reaction of dimer alcohols and/or trimer alcohols or addition products thereof with alkylene oxides with a sulfating agent and subsequent neutralization with an aqueous base.
It has surprisingly been found that, in the sulfation of dimer and trimer alcohols or alkoxylates thereof, the corresponding bis-sulfates and tris-sulfates are obtained in high yields and with high degrees of sulfation. The compounds obtained are so-called Gemini surfactants, the two anionic sulfate groups generally being spaced about 18 carbon atoms apart which ensures that these two hydrophilic groups are able to act independently of one another.
The present invention also relates to a process for the production of dimer alcohol bis-sulfates and trimer alcohol tris-sulfates and ether sulfates, characterized in that dimer alcohols and/or trimer alcohols or addition products thereof with alkylene oxides are reacted with a sulfating agent and the product of this reaction is neutralized with an aqueous base.


Dimer and Trimer Alcohols

The dimer and trimer alcohols used in accordance with the invention are commercially available compounds and may be obtained, for example, by reduction of dimer and trimer fatty acid esters. The dimer and trimer fatty acids themselves may be obtained, for example, by oligomerization of unsaturated fatty acids. The dimer and trimer fatty acids are generally mixtures of acyclic and cyclic dicarboxylic acids containing on average 36


Dimer and Trimer Alcohol Alkoxylates

The dimer and trimer alcohol alkoxylates used as starting compounds may be obtained in known manner by alkoxylation of the dimer and trimer alcohols. The alkoxylates preferably used include, for example, the ethoxylates and propoxylates or adducts containing both ethoxy groups and propoxy groups in the molecule. A particularly preferred embodiment of the invention is characterized by the use of adducts containing an average of 1 to 20 moles of ethylene oxide per OH group and, optionally, an average of 1 to 5 moles of propylene oxide per mole of alcohol. The degrees of alkoxylation mentioned are statistical mean values which, for a special product, may be a whole number or a broken number. Preferred dimer and trimer alcohol alkoxylates have a narrow homolog distribution (narrow range ethoxylates, NRE).
To carry out the process

REFERENCES:
patent: 1968797 (1934-07-01), Bertsch
patent: 4024078 (1977-05-01), Gilbert et al.
patent: 4217296 (1980-08-01), Berkowitz
patent: 4269786 (1981-05-01), Berkowitz
patent: 4735735 (1988-04-01), Borggrefe et al.
patent: 4765926 (1988-08-01), Plummer
patent: 4832876 (1989-05-01), Ahmed
patent: 5117032 (1992-05-01), Fabry et al.
patent: 5290484 (1994-03-01), Lutz
patent: 5811384 (1998-09-01), Tracy et al.
patent: 5846923 (1998-12-01), Reierson
M. Rosen, Chemtech, pp. 30-33 (Mar. 1993).
J. Am. Chem. Soc. 115:10083-90 (1993).
A. Hinze, Fette & Ole, pp. 47-51 (1994).

Affiliated with

Also associated with

Rating

Dimeric alcohol-bis and trimeric alcohol-tris-sulphates and ethe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dimeric alcohol-bis and trimeric alcohol-tris-sulphates and ethe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dimeric alcohol-bis and trimeric alcohol-tris-sulphates and ethe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2275675