Methanol → Boric acid, calcium salt

Temperatur

60 °C

Two hundred (200) grams of a neutral calcium alkylsalicylate (calcium content; 2.0 wt. %) (A), which had been diluted to an extent of effective concentration of 50% by weight with a lubricating oil fraction, 26 g of calcium hydroxide (B), 43.4 g (2.0 moles per mole of calcium hydroxide) of orthoboric acid (C) and 400 g of xylene (F) were put in a 1000-ml four-necked flask fitted with a condenser and heated to 60° C. while agitating. To this mixture were added 120 g of methanol (D) and 20 g of water (E), and the resulting mixture was heated up to a refluxing temperature (66° C.) under agitation and reacted for 4 hours. The reaction mixture was further heated to 140° C. for 1.5 hours to distill out the methanol, water and xylene. Finally the reaction product was diluted twofold with hexane and filtered to remove any residual solids present, and the hexane was distilled out to obtain a desired calcium borate overbased alkylsalicylate.

1. customwere put in a 1000-ml four-necked flask
2. customfitted with a condenser
3. temperaturethe resulting mixture was heated up to a refluxing temperature (66° C.) under agitation
4. customreacted for 4 hours
5. temperatureThe reaction mixture was further heated to 140° C. for 1.5 hours
6. distillationto distill out the methanol, water and xylene
7. additionFinally the reaction product was diluted twofold with hexane
8. filtrationfiltered
9. customto remove any residual solids present
10. distillationthe hexane was distilled out

ORD-Eintrag

ord-839575ac38a5430aa92f3d13c9dfd79b

Quelldatensatz

uspto-grants-1995_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05380508