US3960937A — Ashless additives for lubricating compositions

Claim 1

Independent Claim 190 words

A process for the preparation of an ashless lubricant additive which comprises the steps: 1. first introducing into a reaction zone a petroleum sulfonic acid formed by sulfonating a high molecular weight, refined petroleum fraction having a viscosity of at least 50 to about 720 SUS at 210°F with a sulfonating agent selected from fuming sulfuric acid and liquid sulfur trioxide under sulfonation conditions and a polyamine selected from the group consisting of a. amines of the formula H.sub.2 N[(CH.sub.2).sub.x NH].sub.y H wherein x equals 2-6 and y equals 1-100, and b. a polymer of a 1,2-alkylene imine of the formula ##EQU15## wherein R" is selected from hydrogen and alkyl radicals having 1-14 carbon atoms, wherein the equivalents of petroleum sulfonic acid employed varies from 1 equivalent of petroleum sulfonic acid per mole of polyamine to 0.75A and the equivalents of the cyclic anhydride employed varies from 0.25 (A-E) to A-E, wherein A is the total equivalents of primary and secondary amines in the quantity of polyamine employed and E is the equivalents of petroleum sulfonic acid employed and allowing said petroleum sulfonic acid and said polyamine to interact, 2.

Claim 2

Dependent Claim 190 words

A process for the preparation of an ashless lubricant additive which comprises the steps: 1. first introducing into a reaction zone a petroleum sulfonic acid formed by sulfonating a high molecular weight, refined petroleum fraction having a viscosity of at least 50 to about 720 SUS at 210°F with a sulfonating agent selected from fuming sulfuric acid and liquid sulfur trioxide under sulfonation conditions and a polyamine selected from the group consisting of a. amines of the formula H.sub.2 N[(CH.sub.2).sub.x NH].sub.y H wherein x equals 2-6 and y equals 1-100, and b. a polymer of a 1,2-alkylene imine of the formula ##EQU15## wherein R" is selected from hydrogen and alkyl radicals having 1-14 carbon atoms, wherein the equivalents of petroleum sulfonic acid employed varies from 1 equivalent of petroleum sulfonic acid per mole of polyamine to 0.75A and the equivalents of the cyclic anhydride employed varies from 0.25 (A-E) to A-E, wherein A is the total equivalents of primary and secondary amines in the quantity of polyamine employed and E is the equivalents of petroleum sulfonic acid employed and allowing said petroleum sulfonic acid and said polyamine to interact, 2.

Claim 3

Dependent Claim 81 words

then introducing to the reaction zone a cyclic anhydride of a dicarboxylic acid and allowing it to interact with the product of the interaction between said petroleum sulfonic acid and said polyamine, said cyclic anhydride being represented by the formulas: ##EQU16## or ##SPC2## wherein R and R' can be the same or different and are selected from the group consisting of a hydrogen atom and cyclic, acyclic and aromatic hydrocarbyl groups having 1 to 6 carbon atoms to form said ashless

Claim 4

Dependent Claim 81 words

then introducing to the reaction zone a cyclic anhydride of a dicarboxylic acid and allowing it to interact with the product of the interaction between said petroleum sulfonic acid and said polyamine, said cyclic anhydride being represented by the formulas: ##EQU16## or ##SPC2## wherein R and R' can be the same or different and are selected from the group consisting of a hydrogen atom and cyclic, acyclic and aromatic hydrocarbyl groups having 1 to 6 carbon atoms to form said ashless

Claim 5

Dependent Claim 27 words

lubricant additive. 2. A process according to claim 1 wherein the polyamine is selected from diethylenetriamine, tetraethylenepentamine, and polyethylenimine and the cyclic anhydride is selected from maleic

Claim 6

Dependent Claim 47 words

A process according to claim 1 wherein the contacting temperature in steps (1) and (2) is from room temperature to about 300°F and steps (1) and (2) are conducted in the presence of solvents selected from hydrocarbons having from 5-12 carbon atoms and lube oil blending stocks

Claim 7

Dependent Claim 26 words

A process according to claim 1 wherein the ashless additive is recovered in a lube oil stock having a viscosity at 100°F up to about 150

Claim 8

Dependent Claim 22 words

A process according to claim 1 wherein water formed during the process is recovered by adding an azeotrope forming agent and azeotropically

Claim 9

Dependent Claim 12 words

A process according to claim 5 wherein the azeotrope forming agent is

Claim 10

Dependent Claim 24 words

A process according to claim 1 wherein water formed during the process is recovered by blowing with an inert gas at a temperature from

Claim 11

Dependent Claim 70 words

A process according to claim 1 wherein the equivalents of petroleum sulfonic acid employed varies from 0.15A to 0.65A and the equivalents of the cyclic anhydride employed varies from 0.35 (A-E) to 0.75 (A-E), wherein A is the total equivalents of primary and secondary amines in the quantity of polyamine employed and E is the equivalents of petroleum sulfonic acid employed with the further proviso that there be employed at

Claim 12

Dependent Claim 61 words

A process according to claim 1 wherein the petroleum sulfonic acid is sulfonated in (1) at a temperature in the range of about 50°to about 200°F with an acid-oil ratio of about 0.1:1 to about 0.7:1 when sulfuric acid is the sulfonating agent and a sulfur trioxide to oil ratio of about 0.02:1 to 0.2:1 when liquid sulfur trioxide is the

Claim 13

Dependent Claim 49 words

A process according to claim 1 wherein said petroleum sulfonic acid is treated with an inert gas under stripping conditions to remove free SO 2 in the oil and the stripping is continued until the petroleum sulfonic acid has been reduced in free SO 2 to about 0.15 weight

Claim 14

Dependent Claim 49 words

A process according to claim 10 wherein the petroleum sulfonic acid is contacted with nitrogen at a temperature in the range 80°-100°F for up to about 3 hours under stripping conditions until the free SO 2 in the oil has been reduced to about 0.15 weight percent or less.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1979-06-01	1979-12-01	1980-06-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1983-06-01	1983-12-01	1984-06-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1987-06-01	1987-12-01	1988-06-01	$7700.00	Window Closed / Lapsed

Ashless additives for lubricating compositions

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