US 4,225,446 A · Process for preparing highly basic magnesium sulfonates

Abstract

A process for preparing highly basic magnesium sulfonates useful as lubricants including (a) forming an admixture of an oil-soluble sulfonic acid, a previously overbased magnesium sulfonate having a TBN in excess of about 200, a lower alkanol, and a volatile solvent, (b) heating the admixture to neutralize the acid, (c) cooling the first admixture and then forming a second admixture by adding magnesium oxide, naphthenic acid, a lower alkanol and a diluent oil, (d) carbonating the second admixture with carbon dioxide, while simultaneously adding water and ammonia or an ammonium compound as promoters, during the addition of about the first 25% of the carbon dioxide, (e) heating the carbonated solution to remove water and the lower alkanol, (f) further carbonating the solution for a short time between 180.degree. F. and 220.degree. F., (g) heating the solution to remove water, (h) diluting the solution with volatile solvent, (i) clarifing the solution, and (j) removing the volatile solvent, preferably by heating under vacuum.

Claims43

Dependent claims

A process for preparing a fluid, highly basic magnesium sulfonate comprising:

(a) forming, in the presence of a volatile solvent, an admixture of an oil-soluble sulfonic acid and a magnesium sulfonate having a TBN in excess of about 200;
(b) neutralizing the sulfonic acid;
(c) forming a second admixture of:
(i) the sulfonate prepared from the first admixture, (ii) magnesium oxide, (iii) a naphthenic acid, and (iv) a lower alkanol;
(d) treating the second admixture with carbon dioxide;
(e) treating the second admixture with (i) water and (ii) ammonia or an ammonium compound during the initial phase of the carbon dioxide treatment;
(f) heating the carbonated solution to remove water and the lower alkanol;
(g) cooling and thereafter treating the water and lower alkanol depleted solution with additional carbon dioxide;
(h) heating the further carbon dioxide treated solution to remove water;
and
(i) thereafter clarifying the solution.

8 more elements

A process for preparing a fluid, highly basic magnesium sulfonate comprising:

(a) forming, in the presence of a suitable solvent, an admixture of an oil-soluble sulfonic acid, a magnesium sulfonate having a TBN in excess of about 200, and a lower alkanol;
(b) heating the admixture to neutralize the sulfonic acid;
(c) cooling the admixture to a temperature below about 120.degree. F. and thereafter forming a second admixture of:
the sulfonate prepared from the first admixture, a magnesium oxide having a bulk density between about 13 and 20 lbs/ft.sup.3, an Iodine No. between about 35 and 60 meq/100 g and a particle size less than about 200 mesh, and a lower alkanol.
(d) treating the second admixture with at least about one mole of carbon dioxide per reactive mole of magnesium oxide at a temperature between about 100.degree. F. and 120.degree. F.;
(e) treating the second admixture with (i) water and (ii) ammonia or an ammonium compound, substantially all of the water and the ammonia or ammonium compound being added after carbon dioxide treatment has begun, during the addition of about the initial 25% of the carbon dioxide;
(f) heating the carbonated solution to a temperature in excess of about 250.degree. F. to remove water and the lower alkanol;
(g) treating the water and lower alkanol depleted solution with additional carbon dioxide for about 10 to 30 minutes at a temperature between about 180.degree. and 220.degree. F.;
(h) heating the further carbon dioxide treated solution to a temperature in excess of about 250.degree. F. to remove water;
and
(i) thereafter clarifying the treated solution and removing at least a substantial amount of the volatile solvent.

8 more elements

A process for preparing a fluid, highly basic magnesium sulfonate comprising:

(a) forming an admixture of:
(i) an oil-soluble sulfonic acid, (ii) a magnesium sulfonate, having a TBN in excess of about 200, in an amount sufficient to neutralize the sulfonic acid, (iii) a volatile solvent, and (iv) a lower alkanol present in an amount of from about 0.25 to 2 percent by weight of the sulfonic acid and solvent;
(b) heating the admixture to a temperature in excess of about 180.degree. F. to neutralize the sulfonic acid;
(c) forming a second admixture, at a temperature below about 120.degree. F., of:
(i) the neutralized sulfonic acid, (ii) a magnesium oxide having a bulk density between about 13 to 20 lbs/ft.sup.3, an Iodine No. between about 35 and 60 meq/100 g and a particle size smaller than about 200 mesh, (iii) a naphthenic acid having an acid number between about 150 to 200 in an amount of from about 1 to 15 percent of the weight of the final product;
and (iv) a lower alkanol present in an amount of from about 15 to 40 percent by weight of the magnesium oxide;
(d) treating the second admixture with at least about one mole of carbon dioxide per reactive mole of magnesium oxide at a temperature between about 100.degree. F. and 120.degree. F.:
(e) treating the admixture with water and ammonia, substantially all of the water and ammonia being added after the carbon dioxide treatment has begun, during the addition of about the initial 25% of the carbon dioxide, the water being added in an amount of from about 35 to 75 percent by weight of the magnesium oxide, the ammonia being added in an amount of from about 3 to 12 percent by weight of the magnesium
(f) heating the carbonated solution to a temperature in excess of about 250.degree. F. to remove water and the lower alkanol;
(g) treating the water and lower alkanol depleted solution with additional carbon dioxide for about 10 to 30 minutes at a temperature between about 180.degree. F. and 220.degree. F.
(h) heating the further carbon dioxide treated solution to a temperature in excess of about 250.degree. F. to remove water;
and
(i) thereafter adding a volatile solvent to the solution, clarifying the solution, and removing at least a substantial amount of the volatile solvent from the clarified solution;
wherein a non-volatile diluent oil is added prior to clarification.

11 more elements

Dependencies are inferred from the claim text.

Process for preparing highly basic magnesium sulfonates

Life of this patent

Process for preparing highly basic magnesium sulfonates

Life of this patent

Abstract

Claims43