Process for preparing overbased magnesium sulfonates

Details Process for preparing overbased magnesium sulfonates Process for preparing overbased magnesium sulfonates

1980-12-05

1982-08-31

Waltz, Thomas A.

Compositions

Electrolytes for electrical devices

252 18, 252 25, 252 33, 252 332, 252 334, C10M 140

Patent

active

043471471

ABSTRACT:
A method of preparing superbased magnesium sulfonates by dispersing MgO in the preformed low viscosity overbased magnesium sulfonates. The low viscosity overbased magnesium sulfonates is prepared by sulfonating an alkyl benzene with a material containing SO.sub.3, preferably oleum, and reacting the alkyl benzene sulfonate with magnesium oxide in the presence of a low viscosity diluent, such as No. 2 oil or LOPS (low odor paraffin solvent), together with water, alcohol, and CO.sub.2. The newness of the method lies in the steps of preferably positively utilizing oleum which contains a minor amount of sulfuric acid as a promoter and utilizing also a surfactant couple of a C.sub.12 -C.sub.18 fatty acid such as oleic acid and an ethanol amide such as a lauryl diethanol amide, which may be Witcamide 5138; where a ready made sulfonate is used, such as SA697 (Conoco), H.sub.2 SO.sub.4 is utilized. In certain instances the amide may be omitted with satisfactory results occurring by using the acid alone.
Of particular interest is the preparation of a concentrated magnesium sulfonate wherein the water and alcohol are removed by distillation and a diluent such as LOPS or No. 2 oil is added to produce a slurry.
An important feature of this process lies in the reduction in size of the magnesium oxide particles. CO.sub.2 is preferentially bubbled through the mixture after introduction of the magnesium oxide and at a temperature range of 30.degree.-80.degree. C. with stirring. A typical zone of particle size is 40-50% of about 200 A and 50-60% of 0.1-1.0 microns. This is quite advantageous where an emulsion is formulated and the percentage of magnesium is in the area of 14-23% and preferably 20% or over.

REFERENCES:
patent: 3223630 (1965-12-01), Grayson
patent: 3372118 (1968-03-01), Rense
patent: 3451931 (1969-06-01), Kahn et al.
patent: 3539511 (1970-11-01), Sabol et al.
patent: 3783131 (1974-01-01), Le Suer
patent: 3857790 (1974-12-01), Saunders et al.
patent: 4049560 (1977-09-01), Dominey
patent: 4059536 (1977-01-01), Lallement et al.

Affiliated with

Also associated with

Rating

Process for preparing overbased magnesium sulfonates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing overbased magnesium sulfonates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing overbased magnesium sulfonates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2183543