HCID 131716490, compound → Zinc bromide

HRID 1708844Notes

Reaction equation

HRID 1708844 reaction equation
[Cl-:1].[Cl-].[Ca+2:3].[Cl-].[Na+:5].[OH2:6].[Cl-].[Cl-].[Ca+2].[Zn+2:10].[Br-:11].[Br-]>[Cl-].[Na+].O>[Br-:11].[Br-:11].[Ca+2:3].[Cl-:1].[Na+:5].[OH2:6].[Zn+2:10].[Br-:11].[Br-:11]

Participants

5

Reactant 2

HCID 131716490HCID 131716490, compoundHCID 131716491HCID 131716491, compound

Product 2

HCID 10421208Zinc bromideHCID 131716489HCID 131716489, compound

Reagents, catalysts & solvents 1

HCID 57417360Sodium chloride; waterSolvent

Procedure

The rate of degradation of the HEC gel is controlled by (1) the amount of non-reducing sugar added to the fluid and (2) temperature. The gel can be broken in hours or days. To achieve a faster break time at a given temperature, the concentration of non-reducing sugar is simply increased. The data in Table I also show that the rate of breaking is affected by the type of heavy brine. CaCl2 brine at 11.6 ppg and CaCl2 /ZnBr2 brines at 13 and 16.2 ppg give comparable breaks. Whereas 15.1 ppg CaBr2 brine and 16.2 ppg ZnBr2 gave shorter break times. Generally, gels in ZnBr2 brine break faster than in CaBr2 brine, which break slightly faster than gels in CaCl2 brine.

Workup

  1. waitThe gel can be broken in hours or days
  2. customgive comparable breaks

Sources & evidence

ORD record
ord-2bf15ba65a3549bb9daaddc406b17c31
Source dataset
uspto-grants-1990_08
Patent number
US04946604

Reaction notes

Loading…