HCID 70614338, compound → Calcium terephthalate

HRID 839484Notes

Reaction equation

HRID 839484 reaction equation
[H-].[H-].[H-].[C:4]([O-:15])(=[O:14])[C:5]1[CH:13]=[CH:12][C:8]([C:9]([O-:11])=[O:10])=[CH:7][CH:6]=1.[Ca+2:16]>C(O)CO>[C:4]([O-:15])(=[O:14])[C:5]1[CH:13]=[CH:12][C:8]([C:9]([O-:11])=[O:10])=[CH:7][CH:6]=1.[Ca+2:16]

Participants

3

Reactant 1

HCID 70614338HCID 70614338, compound

Product 1

HCID 167516Calcium terephthalate

Reagents, catalysts & solvents 1

HCID 174Ethylene GlycolSolvent2×

Procedure

In a 20-l container equipped with an agitator was placed 3.0 l of an aqueous solution of 10 wt/vol% of calcium chloride. With stirring 11.3 l of another aqueous solution of 5 wt/vol% of sodium terephthalate was added thereto. Simultaneously with the addition, the solution became milky turbid, which indicated the formation of calcium terephthalate. The agitation was continued for 30 minutes. Next, solid/liquid separation was carried out to obtain calcium terephthalate trihydride, which was then heated at 200° C for 2 hours until anhydride. The resulting particles were plate particles with a thickness of 2 to 4 microns and a maximum diameter of 10 to 30 microns. A portion sampled from the dried calcium terephthalate was introduced and milled for 1 hour in a ball mill and then diluted with ethylene glycol so as to obtain a slurry of 10 wt/vol% of calcium terephthalate in ethylene glycol. The resulting slurry was classified by means of a centrifugal separator, obtaining granular calcium terephthalate anhydride having an average particle diameter of 4.0 microns and a volume shape factor of 0.20.

Workup

  1. additionwas introduced
  2. custommilled for 1 hour in a ball mill

Sources & evidence

ORD record
ord-570f091509374fd7987cbb0749ff1380
Source dataset
uspto-grants-1978_06
Patent number
US04096109

Reaction notes

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