Claims
- 1. A method of preparing a lubricating oil concentrate of a detergent-dispersant sulfurized alkoxylated product consisting essentially of:
- a. first contacting a polyalkene of an average molecular weight between about 500 and 50,000 with P.sub.2 S.sub.5 in the presence of between about 0.1 and 1 wt. % sulfur at a temperature between about 100 and 320.degree.C., said P.sub.2 S.sub.5 comprising between about 5 and 40 wt. % of the reaction mixture,
- b. secondly diluting the polyalkene-P.sub.2 S.sub.5 with mineral lubricating oil to form a lube concentrate of between about 10 and 90 wt. % of said lubricating oil,
- c. thirdly contacting the polyalkene-P.sub.2 S.sub.5 lube concentrate with steam at a temperature between about 100 and 260.degree.C. utilizing at least about a mole ratio excess of steam in respect to said polyalkene-P.sub.2 S.sub.5 reaction product,
- d. fourthyl removing inorganic phosphorus acid from the steam treated polyalkene-P.sub.2 S.sub.5 concentrate,
- e. fifthly contacting the inorganic acid free, steam hydrolyzed polyalkene-P.sub.2 S.sub.5 concentrate with an alkylene oxide of the formula: ##EQU4## where R.sup.1 and R.sup.2 are hydrogen or an alkyl containing 1 to 6 carbon atoms in a mole ratio of said inorganic phosphorus acid free, steam hydrolyzed P.sub.2 S.sub.5 -polyalkene reaction product to said alkylene oxide of at least about 1:1,
- the improvement which comprises the step of contacting the alkoxylated inorganic free, steam hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product of Step e with added sulfur at a temperature between about 130.degree. and 300.degree.C. utilizing an initial polyalkene:added sulfur mole ratio of between about 1:0.5 and 1:10 to form said sulfurized alkoxylated product.
- 2. A method in accordance with claim 1 conducted in an inert atmosphere.
- 3. A method in accordance with claim 2 wherein said polyalkene is a polybutene of a molecular weight between about 500 and 2,000 and said alkylene oxide is ethylene oxide.
- 4. A method in accordance with claim 2 wherein said polyalkene is polyisobutene of a molecular weight of about 1200 and said alkylene oxide is ethylene oxide.
- 5. A finished lubricating oil composition comprising a major amount of lubricating oil and between about 0.1 and 10 wt. % of a detergent dispersant sulfurized alkoxylated product in a lubricating oil concentrate thereof, said concentrate prepared by the method consisting essentially of:
- a. first contacting a polyalkene of an average molecular weight between about 500 and 50,000 with P.sub.2 S.sub.5 in the presence of between about 0.1 and 1 wt. % sulfur at a temperature between about 100.degree. and 320.degree.C., said P.sub.2 S.sub.5 comprising between about 5 and 40 wt. % of the reaction mixture,
- b. secondly diluting the polyalkene-P.sub.2 S.sub.5 with mineral lubricating oil to form a lube concentrate of between about 10 and 90 wt. % of said lubricating oil,
- c. thirdly contacting the polyalkene-P.sub.2 S.sub.5 lube concentrate with steam at a temperature between about 100.degree. and 260.degree.C. utilizing at least about a mole ratio excess of steam in respect to said polyalkene-P.sub.2 S.sub.5 reaction product,
- d. fourthly removing inorganic phosphorus acid from the steam treated polyalkene-P.sub.2 S.sub.5 concentrate,
- e. fifthly contacting the inorganic acid free, steam hydrolyzed polyalkene-P.sub.2 S.sub.5 concentrate with an alkylene oxide of the formula: ##EQU5## where R.sup.1 and R.sup.2 are hydrogen or an alkyl containing 1 to 6 carbon atoms in a mole ratio of said inorganic phosphorus acid free, steam hydrolyzed P.sub.2 S.sub.5 -polyalkene reaction product to said alkylene oxide of at least about 1:1,
- the improvement which comprises the step of contacting the alkoxylated inorganic acid free, steam hydrolyzed polyalkene P.sub.2 S.sub.5 reaction product of step e with added sulfur at a temperature between about 130.degree. and 300 .degree.C. utilizing an initial polyalkene: added sulfur mole ratio of between about 1:0.5 and 1:10 to form said sulfurized alkoxylated product.
- 6. A composition in accordance with claim 5 wherein said method is conducted in an inert atmosphere.
- 7. A composition in accordance with claim 5 wherein in said method polyalkene is polybutene of a molecular weight between about 500 and 2,000 and said alkylene oxide is ethylene oxide.
- 8. A composition in accordance with claim 5 wherein in said method said polyalkene is polyisobutene of a molecular weight of about 1200 and said alkylene oxide is ethylene oxide.
Parent Case Info
This is a division, of application Ser. No. 330,914, filed Feb. 9, 1973.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
330914 |
Feb 1973 |
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