reactor ph optimization - validation report
DESCRIPTION
Reactor PH Optimization - Validation ReportTRANSCRIPT
FPG Oleochemicals
Category:FPG – Utility Plant
Subcategory:Glycerin Acidulation pH Optimization-Validation Report
Originator:Faudzi Abd Rahman
Date Approved:
15/2/2008
Owning Area:Refined Glycerin
Technical Standard #:U001/08
OBJECTIVE:
The objective of this Experimental Order is to increase Dowtherm Header Process Control Strategy . This will also reduce the amount of salt generation in crude glycerin. This is a concurrence type validation.
CONCLUSION:
From the EO, it is concluded that the acidulation pH can be increased up to 3 in order to produce refined glycerin that is able to meet the specification as per GCAS #95897935. At acidulation pH higher than 3, there is possibility that Fatty Acid & Ester in refined glycerin is not able to meet the specification of 0.3% Max.
FINDINGS & OBSERVATIONS:
Based on the observation during the whole period of EO from July 23 2007 until December 6 2007, few observations were made as below:
At acidulation pH of 3 there is reduction in HCL index and NaOH consumption. At the same time NaCl content in crude Glycerin reduce to around 2.8%. No issue observed on crude glycerin and refined glycerin quality.
At acidulation pH of 3.5 and 4.0, there is quality issue on high Fatty Acid & Ester carry over in RG distillate at Glycerin Still. FA&E content was higher than the maximum limit of 0.35. Quality summary of Glycerin Still distillate when acidulation pH at 3.5 and 4.0 as per attachment:
Therefore the acidulation pH can only be increased up to 3. The crude glycerin and refined glycerin quality summary during the EO period is attached below:
RECOMMENDATION:
Therefore it is recommended that that acidulation pH to be controlled between 0.5 and 3.0.Other operating parameters for Crude Glycerin recovery system is as per table 1.
Table 1
Location Critical Parameters Range Target
Glycerin Reactor Acidulation Feed Temperature
80 max < 80
pH into reactor 0.5 – 3.0 2.5Acidulation Interface
Level40-80 75
pH of Neutralized Glycerin
5.0 – 7.0 5.3
Glycerin Evaporation
Feed Tank Level 110 - 410 405
Evaporator Pot Level 40 - 60 50Evaporator Pressure 70 70
Pot Temperature 98 - 103 100Crude Glycerin pH 5 - 7 6
Glycerin Hotwell Hotwell pH 6 - 10 7Hotwell level 40 - 60 50
ATTACHMENT:
SIGNATURES:
By signing below, we indicate that the Validation Report is sufficient to revise the Process Control Strategy (Glycerin / Utilities) FPG-II-022.
Role Name Signature Date
OriginatorMohd Faudzi Abd Rahman
Mohd Faudzi Abd Rahman
14/1/2008
Validation System Owner
Mohd Fairuz Azli B Sulong
10/2/2008
Operation Manager
Azahari Bin Din 13/2/2008
QA ManagerHasni B Hj
Ahmad15/2/2008