Praestol 2640 Alternative — High-MW Anionic PAM Screening
ChinaPAM routes Praestol 2640 replacement inquiries through CNfloc K62 as the first high-MW, medium-charge anionic screening candidate; a side-by-side test on the buyer's actual feed confirms the final grade.
Supply Route Comparison
Published reference data and the ChinaPAM route for Praestol 2640
Source scope: US 2014/0080945 A1 identifies Praestol 2640 as Flocculant B, a high-MW anionic polyacrylamide, and reports its use in phosphate ore slurry and copper-tailings tests. US 2015/0284673 A1 Table 11 lists Praestol 2640 among Ashland granular polymers at medium anionic charge. These publications do not prove identical formulation or drop-in performance between Praestol 2640 and CNfloc K62.
| Parameter | ChinaPAM Supply Route | Praestol 2640 |
|---|---|---|
| Product identity | CNfloc K62 anionic granular powder | Praestol 2640 anionic polyacrylamide |
| Molecular-weight position | High on the ChinaPAM scale | High in US 2014/0080945 A1 Table I |
| Charge position | Medium on the ChinaPAM scale | Medium in US 2015/0284673 A1 Table 11 |
| Form | Granular powder | Granular polymer in US 2015/0284673 A1 Table 11 |
| Documented process context | Offered for process-specific screening; no completed head-to-head result claimed | Phosphate ore slurry and copper tailings patent tests |
| Selection basis | Side-by-side settling test on the actual feed | Existing incumbent or reference grade |
| Powder preparation | 1–3 g/L; maximum 5 g/L; ≤60 min | Not assigned from the reviewed sources on this page |
Specifications
| Primary Screening Route | CNfloc K62 — High MW / Medium charge anionic powder (ChinaPAM scale) |
| Positioned Against | Praestol 2640 |
| Praestol 2640 Identity | Anionic polyacrylamide; high MW |
| Praestol 2640 Charge | Medium (source scale) |
| Praestol 2640 Form | Granular polymer |
| Documented Test Contexts | Phosphate ore slurry; copper tailings |
| ChinaPAM Make-up | 1–3 g/L; maximum 5 g/L |
| ChinaPAM Dissolution | ≤60 min |
| Final Decision | Side-by-side test on the actual feed |
| Packaging | 25 kg PP woven bags with PE liner |
Key Features
- Praestol 2640 identified as an anionic, high-MW polyacrylamide in Hercules patent literature
- Granular form and medium anionic charge reported in an Ashland polymer test table
- Phosphate ore slurry and copper tailings documented as grade-specific test contexts
- CNfloc K62 used as the first high-MW / medium-charge screening candidate on the ChinaPAM scale
- Final grade confirmed on the buyer's actual feed; no drop-in or identical-formulation claim
Applications
- Phosphate ore slurry solid-liquid separation — documented test context
- Copper tailings solid-liquid separation — documented test context
- Comparable mineral-slurry screening after feed-specific validation
Get a Quote for Praestol 2640 Alternative Supply
Start with Praestol 2640, the required quantity and destination. Feed details or an incumbent label help us set the K62 comparison plan, but they are not required before you ask for a quote.
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What the Exact-Grade Sources Establish
US 2014/0080945 A1 Table I lists Praestol 2640 as Flocculant B: a synthetic organic, anionic, high-molecular-weight anionic polyacrylamide. Tables III-C and III-D use Flocculant B in phosphate ore slurry work, and Table V uses it in copper tailings work. Those tables document grade identity and test context; they do not create a universal operating window for every plant.
US 2015/0284673 A1 Table 11 lists Praestol 2640 among Ashland granular polymers and assigns Medium anionic charge. The same table lists 2500 as Nonionic and 2510 and 2515/2515TR as Low anionic, so this page does not classify neighboring grades from the number prefix.
Why K62 Is the First Screening Route
The current ChinaPAM master lists K62 as an anionic grade with high molecular weight and medium charge, and the applicable ChinaPAM TDS identifies it as a granular powder. That makes K62 the first documented same-type screening candidate for a Praestol 2640 inquiry.
The labels High and Medium come from separate supplier scales and are not converted into a numeric equivalence. K62 is offered as the first trial candidate. Acceptance follows the buyer's actual feed, process target and side-by-side result.
Selection Risks and Verification
A similar model number or broad charge label can send the trial to the wrong grade. Confirm that the incumbent is exactly Praestol 2640 and keep any suffix visible before setting the trial route.
Matching ion type, MW band and charge band does not guarantee the same response to mineralogy, dissolved salts, solids loading or plant shear. Compare the candidate and incumbent on the actual feed and record settling rate, supernatant clarity, compacted-bed result and floc stability before a bulk change.
Incomplete powder hydration or excessive shear can make a suitable grade look weak. Prepare the ChinaPAM powder within the stated concentration and dissolution limits and keep the bench and plant addition conditions comparable.
Dosage Guide
Prepare the ChinaPAM trial grade at 1–3 g/L, never above 5 g/L, and allow up to 60 minutes for complete dissolution. Bracket the current plant dose in a side-by-side test and compare settling rate, supernatant clarity, compacted bed and floc stability. The final plant dose remains process-specific.
Frequently Asked Questions — Praestol 2640 Alternative — High-MW Anionic PAM Screening
Which ChinaPAM grade should I start with for Praestol 2640 duty?
Start the screening with CNfloc K62. Praestol 2640 and K62 are both documented in their respective source systems as anionic grades in the high-MW / medium-charge position. The supplier scales are independent, so the shared descriptors nominate a trial candidate; they do not prove one-to-one equivalence.
What do the reviewed sources establish about Praestol 2640?
US 2014/0080945 A1 identifies Praestol 2640 as a high-molecular-weight anionic polyacrylamide and uses it as Flocculant B in phosphate ore slurry and copper tailings tests. US 2015/0284673 A1 Table 11 lists it as an Ashland granular polymer with medium anionic charge.
Does the number 2640 prove the charge level?
No model-number decoding is used for selection on this page. We use the exact-grade source rows for Praestol 2640 and the current ChinaPAM grade table for K62, then confirm the route on the actual feed.
Is CNfloc K62 a guaranteed drop-in equivalent?
No universal drop-in claim is made without a same-condition comparison. K62 is the first documented same-type screening route. Settling rate, supernatant clarity, compacted-bed result and floc stability decide whether it is accepted for the process.
What should I send for a quotation and trial plan?
Start with the exact incumbent grade, required quantity and destination. If available, add the label or TDS, feed type, pH, solids, current dose and the result you need. A document upload is helpful but is not required before asking for a quote.
Related Products
Trademark notice. Praestol 2640 and all other third-party product and brand names on this page are trademarks or registered trademarks of their respective owners. Henan Jinghua New Material Technology Co., Ltd. is not affiliated with, endorsed by, sponsored by or authorised by those owners, and no such relationship is implied. Those names are used here for the sole purpose of identifying the products our grades are compared against, which is necessary to describe what we supply. Our products are independently manufactured and are not licensed copies. Grade descriptors quoted for third-party products are taken from each manufacturer’s own published literature and follow that manufacturer’s own scale; we do not publish figures those manufacturers do not publish. Performance on your process should be confirmed by jar test or CST test before any change of supply.