1. Materials and Reagents
Determination of KOH and KF in Regenerated KOH Samples by Manual Titration
Area
Unit
Operating Procedure #
Certified by
Revision #
Date
Page 3
Lab
OPS-LB-AL-006
1 of 1
Job Hazards
Yes
Access and Egress
Moving Parts
Activities of Others
Noise
Adverse Weather
Rail Movement
Chemical Exposure
Sharp Edges
Electricity
Slips, Trips, and Falls
Fatigue
Static Electricity
Fire and Explosion
Trip Injuries
Ground Contamination
Trapped Pressure
Manual Handling
Working at Height
Other:
Scope / Objective
PPE
Use
Standard (SSP-0011) Y
Full Face Shield / Goggles
Hood
Clothing—Chemical Protection
Gloves—Chemical
Personal Fall Protection
Respirator / Filter Mask
Supplied Air
References / Documents
MSDS on gasoline.
Unit Safe Upper & Lower Limits Spreadsheet
Equipment
Materials and Reagents
Special Instructions
Environmental
Determination of KOH and KF in Regenerated KOH Samples by Manual Titration 1
Tare 100 ml plastic titration cup on balance. 2
Add approximately 0.2 g KOH sample and record weight to 4 decimal places. 3
Transfer sample to 250 ml Erlenmeyer flask using several washings with DI water until a volume of 100 ml is reached. 4
Add several drops of phenolphthalein solution to flask along with stir bar. 5
Titrate sample on stir plate with 0.1 N HCL until color changes from pink to clear. 6
Record volume of HCL used to nearest 0.1 ml. 7
Place sample on hot plate and bring to a boil. If color changes back to pink add additional HCL and adjust volume recorded in Step 6. 8
Remove sample from hot plate and allow to cool for a couple of minutes. 9
Add 2 dropperfuls of methyl orange indicator solution using plastic disposable pipet. 10
Place sample on stir plate and titrate with 0.05 N Th(NO3)4 until sample color changes from orange to a deeper reddish orange color. 11
Record volume of Th(NO3)4 used to nearest 0.1 ml. 12
Calculate results as follows:
% KOH = (ml HCL)(0.1)(5.61) % KF = (ml Th(NO3)4)(0.05)(5.61)
wt. of KOH sample wt. of KOH sample 13
Report results in Labworks to the nearest 2 decimal places.
Completed Date:
Prepared By:
Approved By:
Note: This procedure is only valid at the time of printing. The control version can be found on the Meraux Refinery intranet.