O-Xylene → Boric acid, calcium salt

Temperature

60 °C

200 g of the same neutral calcium alkylsalicylate (A) as used in Example 1, 26 g of calcium hydroxide (B), 43.4 g (2.0 moles per mole of the 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 was added 20 g of water, and the resulting mixture was heated up to a refluxing temperature (66° C.) under agitation and reacted for 4 hours to obtain a reaction product. The reaction product was further heated to 140° C. for 1.5 hours to distill out the 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 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. customto obtain a reaction product
6. temperatureThe reaction product was further heated to 140° C. for 1.5 hours
7. distillationto distill out the water and xylene
8. additionFinally the reaction product was diluted twofold with hexane
9. filtrationfiltered
10. customto remove any residual solids present
11. distillationthe hexane was distilled out

ORD record

ord-8da2f68ee808453cb98e6a2dd422600a

Source dataset

uspto-grants-1995_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05380508