O-Xylene → Boric acid, calcium salt

HRID 1768890

Reaction equation

HRID 1768890 reaction equation
C(=O)([O-])[O-].[Ca+2:5].C1(C)C(C)=CC=CC=1.[B:14]([OH:17])([OH:16])[OH:15]>O>[B:14]([O-:17])([O-:16])[O-:15].[Ca+2:5].[B:14]([O-:17])([O-:16])[O-:15].[Ca+2:5].[Ca+2:5]

Participants

5

Reactant 3

HCID 7237O-XyleneHCID 7628Boric AcidHCID 10112Calcium Carbonate

Product 1

HCID 134660Boric acid, calcium salt

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
95 °C

Procedure

A solution of 200 g of a calcium carbonate overbased alkylsalicylate (TBN 280 mgKOH/g, calcium content; 10.0 wt. %) and 200 g of xylene were put in a 1000-ml four-necked flask fitted with a condenser and heated to 95° C. while agitating. To this mixture was added 20 g of orthoboric acid, and the temperature was gradually increased to 145° C., while the reaction water was removed by azeotropic distillation by spending time for 1.5 hours. Subsequently, the reactor contents were filtered to obtain a filtrate (solution) which was cooled and then centrifuged to remove any residual solids present. Finally, the xylene was removed in vacuo to obtain a calcium borate overbased alkylsalicylate.

Workup

  1. customfitted with a condenser
  2. customwas removed by azeotropic distillation by spending time for 1.5 hours
  3. filtrationSubsequently, the reactor contents were filtered
  4. customto obtain a filtrate (solution) which
  5. temperaturewas cooled
  6. customto remove any residual solids present
  7. customFinally, the xylene was removed in vacuo

Sources & evidence

ORD record
ord-4ec91b14d08047afab2c46c28cfd9104
Source dataset
uspto-grants-1995_01
Patent number
US05380508

Linked notes

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