Preparation of colloidal solid suspensions in aqueous solutions

Claim 2

AN ADDITIVE FOR FORMING A COLLOIDAL SUSPENSION OF ASPHALTIC SOLIDS IN AN AQUEOUS SOLUTION IN THE ABSENCE OF OIL WHICH COMPRISES: COLLOIDAL ASPHALTIC SOLIDS, AND A DISPERSANT PRESENT IN SAID ADDITIVE IN AN AMOUNT IN THE RANGE OF FROM ABOUT 1% TO ABOUT 50% BY WEIGHT THEREOF CONSISTING OF A MIXTURE OF WASTE LIGNIN LIQUOR PRESENT IN AN AMOUNT IN THE RANGE OF FROM ABOUT 25% TO ABOUT 75% BY WEIGHT OF SAID MIXTURE AND AN AMIDE PRESENT IN AN AMOUNT IN THE RANGE OF FROM ABOUT 25% TO ABOUT 75% BY WEIGHT OF SAID MIXTURE, SAID AMIDE BEING FORMED BY REACTING A SATURATED OR UNSATURATED FATTY ACID HAVING IN THE RANGE OF FROM ABOUT 14 TO ABOUT 18 CARBON ATOMS WITH N-METHYL TAURINE.

Claim 3

The additive of claim 1 wherein the amide is oleyl amide.

Claim 4

The additive of claim 2 wherein the dispersant is further characterized to be a substantially dry solid prepared by drying the oleyl amide-waste lignin liquor mixture.

Claim 5

The additive of claim 3 wherein the dry dispersant is present in said additive in an amount of about 4% by weight thereof.

Claim 6

The additive of claim 4 wherein the oleyl amide is present in said dispersant in an amount of about 50% by weight thereof and the waste lignin liquor is waste sulfite liquor present in the dispersant prior to drying in an amount of about 50% by weight of the dispersant.

Claim 7

An additive for forming a colloidal suspension of asphaltic solids in an aqueous solution in the absence of oil which comprises: colloidal asphaltic solids; and a dispersant present in said additive in an amount in the range of from about 1% to about 50% by weight of said additive, said dispersant being prepared by mixing in about equal amounts by weight the oleyl amide formed by reacting oleic acid with N-methyl taurine and waste sulfite liquor, and then drying said mixture.

Claim 8

An additive for forming a colloidal suspension of asphaltic solids in an aqueous solution in the absence of oil which comprises: colloidal asphaltic solids; and a dispersant present in said additive in an amount in the range of from about 1% to about 50% by weight of said additive, said dispersant being prepared by mixing in about equal amounts by weight the oleyl amide formed by reacting oleic acid with N-methyl taurine and waste sulfite liquor, and then drying said mixture.

Claim 9

The additive of claim 6 wherein the dried dispersant is present therein in an amount of about 4% by weight thereof.

Claim 10

An improved aqueous drilling fluid containing a colloidal suspension of asphaltic solids in the absence of oil which comprises: water; an additive consisting of colloidal asphaltic solids and a dried mixture of an amide and waste lignin liquor, the amide being present in said mixture in an amount in the range of from about 25% to about 75% by weight and being formed by reacting a saturated or unsaturated fatty acid having in the range of from about 14 to about 18 carbon atoms with N-methyl taurine, the waste lignin liquor being present in said mixture in an amount in the range of from about 25% to about 75% by weight prior to drying, and the dried amide-waste lignin liquor mixture being present in said additive in an amount in the range of from about 1% to about 50% by weight of said additive; and said additive being present in said drilling fluid in an amount in the range of from about 0.5% to about 2% by weight of said water.

Claim 11

An improved aqueous drilling fluid containing a colloidal suspension of asphaltic solids in the absence of oil which comprises: water; an additive consisting of colloidal asphaltic solids and a dried mixture of an amide and waste lignin liquor, the amide being present in said mixture in an amount in the range of from about 25% to about 75% by weight and being formed by reacting a saturated or unsaturated fatty acid having in the range of from about 14 to about 18 carbon atoms with N-methyl taurine, the waste lignin liquor being present in said mixture in an amount in the range of from about 25% to about 75% by weight prior to drying, and the dried amide-waste lignin liquor mixture being present in said additive in an amount in the range of from about 1% to about 50% by weight of said additive; and said additive being present in said drilling fluid in an amount in the range of from about 0.5% to about 2% by weight of said water.

Claim 12

An improved aqueous drilling fluid containing a colloidal suspension of asphaltic solids in the absence of oil which comprises: water; an additive consisting of colloidal asphaltic solids and a Dispersant prepared by mixing oleyl amide with waste sulfite liquor in equal amounts by weight and then drying said mixture, the oleyl amide being formed by reacting oleic acid with N-methyl taurine, and the dispersant being present in said additive in an amount of about 4% by weight of said additive; and said additive being present in said drilling fluid in an amount in the range of from about 0.5% to about 2% by weight of the water present therein.

Claim 13

An improved aqueous drilling fluid containing a colloidal suspension of asphaltic solids in the absence of oil which comprises: water; an additive consisting of colloidal asphaltic solids and a Dispersant prepared by mixing oleyl amide with waste sulfite liquor in equal amounts by weight and then drying said mixture, the oleyl amide being formed by reacting oleic acid with N-methyl taurine, and the dispersant being present in said additive in an amount of about 4% by weight of said additive; and said additive being present in said drilling fluid in an amount in the range of from about 0.5% to about 2% by weight of the water present therein.