To describe a standard operating procedure (SOP) for the cleaning of dedicated storage tanks used for recovered & purified solvents.
1.0 PURPOSE:
To describe a standard operating procedure (SOP) for the cleaning of dedicated storage tanks used for recovered & purified solvents.
2.0 SCOPE:
The SOP describes in detail the method for cleaning of dedicated storage tanks used for recovered & purified solvents.
3.0 RESPONSIBILITY:
The responsibility of cleaning of dedicated storage tanks used for recovered & purified solvents as per the SOP lies with the staff of the rank not lower than operator of production department.
The responsibility of preparing, reviewing and approving the SOP lies with the Executive (Production), Head of Production and Head of QAD respectively.
4.0 METHOD:
4.1 Open the manhole cover and bottom valve.
4.2 Clean the inner surface of the storage tank with approximately 50 L. of soft water and drain.
4.3 Rinse the inner surface with the suitable solvent of approximately 10 L. and send for recovery.
4.4 Repeat 4.3 two more times.
4.5 Close the manhole cover and bottom valve.
4.6 Clean the outer surface of the storage tank with muslin cloth till it is free from visible foreign matter.
4.7 The total time taken for carrying out steps 4.1 to 4.6 is about 1 hour.
4.8 Frequency: Cleaning shall be done as follows
|
S.No. |
Name of the solvent |
Storage tank No. |
Frequency of cleaning |
|
|
Recovered Toluene Lot-1 Stage-1 |
21 |
After completion of 10 individual batches. |
|
|
Recovered Ethyl Acetate Stage-1 |
22 |
After completion of 10 individual batches. |
|
|
Recovered Toluene Lot-2 Stage-1 |
23 |
After completion of 10 individual batches. |
|
|
Purified IMS – Stage-III |
34 |
After completion of 5 purified batches. |
|
|
Recovered IMS – Stage-III |
33 |
After completion of 8 individual batches. |
|
|
Recovered MIBK– Stage-III |
36 |
After completion of 10 individual batches. |
|
|
Hexane MLs – Stage-III |
32 |
After completion of 6 individual batches. |
|
|
Water wash – Stage-III |
39 |
After completion of 10 individual batches. |
|
|
Sodium carbonate + water wash – Stage-III |
40 |
After completion of 10 individual batches. |
|
|
Recovered Hexane – Stage-III |
52 |
After completion of 5 purified batches. |
|
S.No. |
Name of the solvent |
Storage tank No. |
Frequency of cleaning |
|
|
Purified IMS – Stage-V |
44 |
After completion of 10 purified batches. |
|
|
IMS MLs – Stage-V |
31 |
After completion of 10 individual batches. |
|
|
Recovered IMS – Stage-IV |
35 |
After completion of 10 individual batches. |
|
|
Recovered IMS – Stage-IV |
37 |
After completion of 10 individual batches. |
5.0 RECORDING:
The cleaning operation shall be recorded by the staff of the rank not lower than operator of production department in the dedicated storage tanks cleaning record as shown in annexure.
Storage tank No.: SOPxxxxx
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Previous |
Time of cleaning Hrs-Min. |
Remarks |
Signature |
Checked |
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Duration |
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Production, cleaning, purified solvents
