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By: Brent Hardman, P.E. 740 E. Monroe Road, St. Louis, MI 48880 www.powellfab.com High Strength Low Salt Hypo (HSLS Hypo) Improved Hypo Quality and Production.

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Presentation on theme: "By: Brent Hardman, P.E. 740 E. Monroe Road, St. Louis, MI 48880 www.powellfab.com High Strength Low Salt Hypo (HSLS Hypo) Improved Hypo Quality and Production."— Presentation transcript:

1 By: Brent Hardman, P.E. 740 E. Monroe Road, St. Louis, MI High Strength Low Salt Hypo (HSLS Hypo) Improved Hypo Quality and Production

2 What is High Strength Low Salt Hypo? 30% by wt. NaOCl with 8.5% by wt. NaCl 13% by wt. NaOCl with 3.7% by wt. NaCl 6% by wt. NaOCl with 1.7% by wt. NaCl Traditional Hypo: 13% by wt. NaOCl with 10.4% by wt. NaCl 6% by wt. NaOCl with 4.7% by wt. NaCl

3 HSLS Hypo Process Diagram Powell HSLS Hypo Generator Powell HSLS Hypo Salt Removal Cl 2 50% Caustic 30% HSLS Hypo Salt GPL Av. Cl 2

4 HSLS Hypo Solution

5 Salt Removal System

6 Traditional Hypo vs. HSLS Hypo Traditional Hypo HSLS Hypo NaOClNaClSG NaOClNaClSG Wt. % 30.0%XX 8.5% %XX 7.1% %XX 5.7% %13.0% %4.7% %11.9% %4.3% %10.4% %3.7% %8.3% %3.0% %6.3% %2.3% %4.7% %1.7% %2.4% %0.9%1.0376

7 Chemistry Advantages Reduction in Ionic strength of the solution: ◦ Slower decomposition resulting in a longer half-life ◦ Less chlorate ion formation ◦ Less perchlorate ion formation ◦ Less oxygen formation

8 Decomposition

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11 Chlorate Formation

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13 Perchlorate Formation

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15 Oxygen Formation

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17 What are the Production Advantages? Reduced chlorine and caustic consumption per gallon produced Recovery of salt for raw material savings Improved stability and reduced weight allow more flexibility of logistics ◦ Lower specific gravity will reduced the overall weight load for shipment of same volume ◦ Increased volume per shipment for same load weight

18 Chlorine and Caustic for HSLS Hypo With lower decomposition rates, diluted HSLS hypo can be shipped at a lower strength than traditional hypo. Assuming a storage time of 3 days to ship no less than 12.0% Traditional Hypo is typically manufactured at 13.0%. HSLS Hypo could be diluted to 12.6%. Difference accounts for 3.0% savings in raw materials.

19 Reduced Shipping Strength

20 Salt Savings for HSLS Hypo Approximately 3,300-3,600 lbs. of NaCl consumed to produce 2,000 lbs. of chlorine 2,000 lbs. of chlorine reacted to 30% NaOCl = 1230 lbs. of NaCl savings by reclaiming salt 1230 lbs. of reclaimed salt = 34-37% needed for original electrolysis Reclaimed salt is very pure; if returned back to chlor- alkali plant only requires secondary brine treatment

21 Salt Purity Element / Compound mg/kg NaCl99.85% Insolubles<0.005% Al<1.6 Ba<0.17 Ca0.39 Mg<0.3 Sr<1.6 Fe<0.03 SiO Na 2 SO 4 N/D

22 Storage HSLS Hypo

23 HSLS Hypo Shipping Advantages HSLS Hypo is stored on producers site at 50 ° F. One tank truck load (5,000 gal.) of 13.0% diluted HSLS Hypo contains 3,900 lbs. less salt than tradition hypo. 5,000 gal. tank truck load of 30% wt. equals 13,750 gallons of 13% wt. High dilution ratio allows for shipment flexibility. ◦ Shipment of 30% wt.  Economically ship 2.75 time farther  Increase total delivered volume by 2.75, diluted at distribution center or customer site ◦ Shipment of diluted product  Increased stability allows for decreased shipping strength

24 HSLS Hypo Shipping

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26 HSLS Hypo Summary HSLS Hypo with lower salt concentration offers a product that is more stable and lighter. ◦ Greater stability means less sodium chlorate and perchlorate formation during decomposition. Reclaim salt to improve chlor-alkali plant efficiencies. HSLS Hypo can improve the shipment economics by: ◦ Increasing shipping radius from the plant ◦ Lighter product therefore more hypo per load

27 Powell Contact Information Powell Fabrication & Manufacturing, Inc. 740 E. Monroe Road St. Louis, MI Ph: Fax: Website:


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