Detergent additives
AssigneeExxon Research & Engineering Co.
InventorAlan Michael Dominey
Life of this patent
Estimating the term…
Abstract
Producing an overbased magnesium phenate detergent by carbonating a mixture of a sulphur containing phenol, a smaller amount of a sulphonic acid, sulphonate or sulphate, an alkanol, magnesium oxide or hydroxide and a carboxylic acid, anhydride or salt.
Claims16
A process for preparing an overbased magnesium detergent having a total base number of about 200 to 250, which is useful in lubricating oil, said process comprising blowing carbon dioxide into a refluxing reaction mixture until reaction substantially ceases, said reaction mixture comprising:
- a. 15 to 40 wt. % of a member selected from the group consisting of:
- sulphurised C.sub.8 -C.sub.60 hydrocarbyl substituted phenol, C.sub.6 -C.sub.60 hydrocarbyl substituted thiophenol, and C.sub.6 -C.sub.60 hydrocarbyl substituted phenol or thiophenol mixed with a sufficient amount of elemental sulfur to sulfurize said phenol or thiophenol;
- b. 5-15 wt. % of a member selected from the group consisting of:
- alkaryl sulphonic acid having a molecular weight of about 300 to 700;
- alkali metal and alkaline earth metal salts of said sulphonic acid, and alkali metal and alkaline earth metal sulfate salts of the reaction product of sulphuric acid with a member selected from the group consisting of:
- cracked wax of 20 to 30 carbon atoms, C.sub.8 to C.sub.25 olefin, and C.sub.8 to C.sub.25 alcohol;
- c. 5-15 wt. % of an alcoholic material selected from the group consisting of:
- ethylene glycol, diethylene glycol, C.sub.1 to C.sub.5 monohydric alkanol, and C.sub.2 to C.sub.6 alkoxy alkanol;
- d. 2-15 wt. % of active magnesium oxide having a surface area of at least 80 square meters/gm;
- e. at least 0.1 wt. % of a member selected from the group consisting of:
- C.sub.1 to C.sub.18 aliphatic or aromatic, saturated or unsaturated, mono or polycarboxylic acid;
- anhydrides thereof;
- and ammonium and Group I and Group II metal salts of said C.sub.1 to C.sub.18 carboxylic acids;
- and
- f. at least 10 wt. % of a diluent oil.
A process for preparing an overbased magnesium detergent, having a total base number of about 200 to 250, which is useful in lubricating oil, said process comprising blowing carbon dioxide into a refluxing reaction mixture until reaction substantially ceases, said reaction mixture comprising:
- a. 15 to 40 wt. % of sulphurised C.sub.8 -C.sub.20 hydrocarbon substituted phenol;
- b. 5-15 wt. % of an alkaryl sulphonic acid, having a molecular weight of about 300 to 700;
- c. 5-15 wt. % of alcoholic material selected from the group consisting of:
- methanol, ethylene glycol, and C.sub.2 to C.sub.6 alkoxy alkanol;
- d. 2-15 wt. % of active magnesium oxide having a surface area of at least 80 square meters/gm;
- e. at least 0.1 wt. % of a member selected from the group consisting of:
- C.sub.1 to C.sub.4 aliphatic, saturated, monocarboxylic acid;
- anhydrides thereof;
- and ammonium and magnesium salts of said acid;
- and
- f. at least 10 wt. % of a diluent oil.
Dependencies are inferred from the claim text.