Document 8VB1N69ZroyXG3wYM3XE1kxkm

Ethanolamines/Glycol Ethers Tier 3 Procedure Section No.: Issue No.: Original Date: Revision Date: Title: References: 5010 2.4 02/25/94 Author: Anthony Machie 05/19/97 Phosphorous Acid ( H3P03) Addition Glossary Of Equipment Identification (Text #114) 5010: Phosphorous Acid ( H3P03) Addition 1.0 Objective: 1.1 To inject H3P03 into the Ethanolamines reactor through T-211 to minimize T-271 bottoms flow, reduce impurities, and TEA Color. 2.0 Responsibility: 2.1 It is the responsibility of operations to ensure the safe and efficient execution of this procedure. 3.0 Method: 3.1 This material will enter the Ethanolamines system, by nitrogen pressure from D-225. 4.0 Safety notations: 4.1 A slicker suit, monogoggles and rubber gloves are required to do any work on the acid tank or lines. 4.2 If the plant trips on oxide, the acid system EBV will also trip. 4.3 If the acid system EBV closes, the acid control valve will also close. 4.4 The acid flow meter is a micromotion that can read flow in either direction. Negative flow will trip the EBV and close the control valve. Negative flow indicates that ammonia is backflowing into the acid lines and tank. 5.0 Special Notations: 5.1 All material produced during an acid run will be placed in the following tanks. MEA DV-250 DEA DV-260 for Monsanto spec. TEA DV-255 H3P03 None of this material may be shipped to Europe! Date Printed: April 18, 1998 Printed Copies Of This Document are Uncontrolled And Not Subject To Update. The Controlled Version Is Maintained In File:GE_OPDIS\Original\Amines\Amonia\5010.doc Page 1 Of 3 DO A 060198 CONFIDENTIAL 5.2 Glycol 2 cannot receive any A-5503 manufactured with phosphorous acid. The phosphorous may poison their catalyst. They must take TEA instead of A-5503. 5.3 The plant has demonstrated that the impurities and TEA color can be significantly reduced by the addition of approximately 100- 165 ppm of H3P03 .relative to the EO, into the process. 5.4 The flow of acid is controlled on the picsvax. It is ratioed to the EO flow. 5.5 The acid flow setpoint is calculated as follows. Acid Flow = PPM/1,000,000 x (EO Flow + NH3 Flow) 5.6 The A-5503 spec defines a maximum of 0.9% phosporous in T-271 bottoms. This should not be a problem based on the above formula. To caculate: % phosphorous in A-5503 = Acid Flow/T-271 Bottoms flow x 100 6.0 Startup of System and Transition into an Acid Campaign: 6.1 Valve the acid tank and line correctly to flow acid into T-211. Place the controller on computer control (remote). 6.2 Quit adding NaBH4 to DV-272 pots after the acid has been at setpointfor at least 12 hours. 6.3 Leave the Charcoal filter on line until the charcoal delta is less than 1 color unit. At this point, bypass the charcoal filter. 6.4 Verify non-acid storage tanks for transfer of check tanks. 6.5 Decrease still bottoms flow to 600 Ib/hr after the acid has been at setpoint for at least 12 hours or until the color has dropped significantly from the non-acid campaign. 6.6 Check the acid inventory. 7.0 Shutdown of System and Transition into a Non-Acid Campaign: 7.1 At the conclusion of an acid run, the whole injection line and pump must be flushed with cold condensate for about one hour and then double blocked and bled. 7.2 Add NaBH4 to DV-272 pots as per the procedure. 7.3 Put Charcoal filter on line as per the procedure. 7.4 Verify non-acid storage tanks for transfer of check tanks. 7.5 Increase still bottoms flow to 1200 Ib/hr. 7.6 Close transfer valves after completing all transfers to non-acid tanks. Date Printed: April 18, 1998 Printed Copies Ot This Document are Uncontrolled And Not Subject To Update. The Controlled Version Is Maintained In File:GE_OPDIS\Original\Amines\Amonia\5010.doc Page 2 Of 3 DO A 060199 CONFIDENTIAL 7.7 Notify Loading personnel that we are now on a non-acid run. They must check with the control room every morning before starting loading pumps to ensure the proper "line-up" of equipment. 8.0 Revisions: Revision No. 1 Revision No. 2 Revision No. 3 Revision No. 4 Revision No. 5 12-29-95 12-12-96 02-03-97 04-12-97 05-19-97 Yearly Review Updated for 12/96 - 1/97 plant trial Added section 6 and 7. Changed wording of section 3.1, 4.1, 5.3, 5.4, 6.1 Added sections 4.3, 4.4, 7.6, 7.7 Changed title from "Phosphorous Acid Injection Test" to "Phosphorous Acid Addition" Updated 5.3 and 5.5 to reflect ppm calculation based on total flow instead of EO flow only. Date Printed: April 18, 1998 Printed Copies Of This Document are Uncontrolled And Not Subject To Update. The Controlled Version Is Maintained In File:GE_OPDIS\Original\Amines\Amonia\5010.doc Page 3 Of 3 rn A 060200 CONFIDENTIAL