Praestol 2515 Equivalent — Low-Charge Anionic PAM Grade Screening
ChinaPAM can accept a Praestol 2515 enquiry and move to a low-charge anionic powder screening route once the full label, feed type and key process conditions are confirmed. Send the exact label as printed — bare 2515, 2515 TR or whichever suffix your bags carry — and the enquiry opens. ChinaPAM will quote the screening bracket, discuss sample arrangements and request any intake conditions needed to narrow the route.
Supply Route Comparison
Published reference data and the ChinaPAM route for Praestol 2515
PRAESTOL is a trademark of its respective owner. ChinaPAM is an independent manufacturer and is not affiliated with, endorsed by, licensed by or a distributor for the brand owner. The grade name is used only to identify the product a buyer is comparing. The two documents cited on this page are third-party patent publications from 2010 and 2015 — they are not ChinaPAM documents and they establish nothing about ChinaPAM. Our products are separately branded ChinaPAM grades and are not licensed copies.
| Parameter | ChinaPAM Supply Route | Praestol 2515 |
|---|---|---|
| Product form | Anionic polyacrylamide powder; grade selected after feed intake and MW confirmation | Granular Praestol polymer — US 2015/0284673 A1 Table 11 |
| Charge position | Low-charge bracket — 1042 and 1082 are the two anchor grades on the ChinaPAM low-charge axis | Low anionic charge per US 2015/0284673 A1 Table 11 (Ashland scale, 2015 publication); weakly anionic per WO 2010/006366 A1 (2010) |
| Molecular-weight position | Decided by feed intake and trial — neither primary record establishes the incumbent MW tier | UNKNOWN from both accepted primary records |
| Bulk density / viscosity | Confirmed against the quoted ChinaPAM grade at quotation | 42 lb/ft³ bulk density; >2000 cP (DW) / >180 cP (brine) — US 2015/0284673 A1 Table 11 historical values; not current brand-owner specifications |
| pH range | Confirmed against the quoted ChinaPAM grade | 5–12 per US 2015/0284673 A1 Table 11 |
| Formulation | Separately branded ChinaPAM grade | Weakly anionic copolymer of acrylamide and sodium acrylate — WO 2010/006366 A1. No identical-formula claim in either direction. |
| Current availability | Confirmed in the quotation against grade, destination and order conditions | Unknown in both accepted primary records |
| Documents | Current price, stock status, lead time, applicable TDS and sample arrangements are confirmed in the quotation. Batch-specific COA terms are confirmed with the shipment. | Two third-party patent publications (2010 and 2015) — not ChinaPAM documents and not current brand-owner specifications |
Specifications
| Incumbent Model | Praestol 2515 (retain TR when present; bare 2515 and 2515 TR are distinct purchasing labels) |
| Ionic Type | Low / weakly anionic polyacrylamide powder (US 2015/0284673 A1 Table 11; WO 2010/006366 A1) |
| Charge Band (Source) | Low — per US 2015/0284673 A1 Table 11 (Ashland scale, 2015 patent publication) |
| MW Band | UNKNOWN from accepted primary records; not established by either patent source |
| Bulk Density (Table 11) | 42 lb/ft³ — historical patent-table value; not a current specification |
| Solution Viscosity (Table 11) | Above 2000 cP distilled water; above 180 cP brine — historical patent-table values |
| Effective pH Range (Table 11) | 5–12 — per US 2015/0284673 A1 Table 11 |
| ChinaPAM Route | Low-charge anionic powder bracket; 1042 (MW low) and 1082 (MW very high) are bracket anchors, not co-equal equivalents |
| Route Boundary | Grade screening bracket — no single grade is named before MW need is confirmed by feed intake and trial |
| Current Availability (Either Side) | Unknown in the held sources; confirmed only in a quotation |
Key Features
- Low-charge anionic identity established across two independent patent publications from 2010 and 2015
- 2515 and 2515 TR treated as distinct purchasing labels; the grouped patent table row does not authorise suffix transfer
- Molecular-weight position kept open because neither accepted primary record establishes it — the trial decides
- Two bracket anchors (1042 and 1082) at opposite MW ends make the charge lane clear without overstating a cross-vendor MW match
- Patent table values carried as historical Ashland data points, not as current brand-owner specifications
- Praestol 2515 and 2640 occupy distinct charge positions in the same patent table; a buyer mistakenly applying 2640 medium-charge selection logic to a 2515 low-charge enquiry risks over-dosing or charge reversal before the feed is tested
- Two evidence-based failure modes surfaced, each with a cheap verification step that catches it before bulk commitment
Applications
- Low-charge anionic selection for a confirmed Praestol 2515 or 2515 TR purchase requirement
- Correcting a buyer enquiry where Praestol 2640 medium-charge selection logic was mistakenly applied to a Praestol 2515 low-charge requirement without a charge-demand check
- Weakly anionic bridging or charge-neutralisation duties where the low-charge position governs, screened on feed after intake
- Slurry or water applications where pH 5–12 operating range is the known constraint and charge demand is below medium
Get a Quote for Praestol 2515 Alternative Supply
Send the full label as printed — bare 2515 or 2515 TR as shown — or a photo of the bag. That is enough to open the enquiry. Feed type, pH, solids and your incumbent active dose sharpen the bracket and the trial plan.
Related Articles
The supply answer first: a low-charge screening bracket, no single grade pre-named
A confirmed Praestol 2515 enquiry gets a low-charge anionic powder screening bracket from ChinaPAM. ChinaPAM provides grade-selection support after reviewing the full label and process conditions. That is the commercial answer.
Molecular weight is not established by either accepted primary record, so no single grade is pre-selected and the trial decides which bracket position wins on the feed. 1042 and 1082 are the two bracket anchor points — one at low MW and one at very high MW on the ChinaPAM scale — and they define the charge lane, not a finished match.
Price, stock and lead time belong to the quotation and are not stated from the patent sources.
Identity lock: retain the full label including TR when present
The purchase label may read bare 2515 or 2515 TR. The TR suffix is a distinct purchasing label and is not transferred, dropped or assumed to mean the same thing as the bare grade without issuer evidence. Send the full label exactly as printed; any suffix variant not named in the accepted sources cannot be assumed interchangeable.
Praestol 2640 occupies the medium-charge position in the same US 2015/0284673 A1 patent table where 2515 sits at low charge. A buyer with a 2515 low-charge requirement who receives a 2640 medium-charge quote has not had their charge demand confirmed on the actual feed. These two grades need separate enquiry routes.
Send the exact label, or a photograph of the bag, to open the enquiry. The current TDS, where the buyer holds one, is reviewed alongside the label rather than assumed from this page.
Three facts the sources actually establish
Each fact below is tied to a specific document and locator. None is inferred from a resale listing.
| Fact | Source | What it does not establish |
|---|---|---|
| US 2015/0284673 A1 Table 11 lists 2515/2515TR: low anionic charge, bulk density 42 lb/ft³, solution viscosity above 2000 cP (DW) / above 180 cP (brine), pH 5–12. | US patent publication US 2015/0284673 A1, Table 11, 2015-10-08. | These are historical patent-table values, not current brand-owner specifications. Molecular weight is not given. 2515 and 2515TR sit in one row but remain distinct labels. |
| WO 2010/006366 A1 identifies Praestol 2515 as a weakly anionic copolymer of acrylamide and sodium acrylate. | WIPO patent publication WO 2010/006366 A1, 2010-01-21. | Chemical identity only. Does not establish MW, current specification or cross-vendor equivalence. |
| WO 2010/006366 A1 Example 4 prepares a Praestol 2515 flocculant solution for the patent's lithium-brine process. | WO 2010/006366 A1, Example 4. | A single patent process only. The lithium-brine context is specific to that example and is not a general application recommendation. |
Two failure modes and the check that catches each one
Both come out of the held evidence for this specific model, not from general advice.
| Trigger | Consequence | Verification step |
|---|---|---|
| Applying Praestol 2640 medium-charge selection logic to a Praestol 2515 low-charge enquiry without confirming the feed's actual charge demand. | A medium-charge route is quoted for a low-charge requirement, producing over-dosing or charge reversal on the process. | Lock the exact 2515 suffix and confirm the low-charge bracket position on the actual feed before selecting a primary route. Do not apply 2640 selection logic without a charge-demand check. |
| The grouped patent table row is read as proof that bare 2515, 2515 TR and any other suffix variants are interchangeable. | The quote, TDS and trial are built for the wrong grade designation, and a different product may be shipped. | Require the bag label or current TDS and keep each suffix as a separate identity until the issuer confirms otherwise. The accepted sources do not name every possible suffix — send the label exactly as printed. |
Intake, trial design and acceptance metrics
Useful intake, in order: full label including suffix; feed source and what produces it; particle-size distribution and clay or fines fraction if relevant to the flocculation duty; solids percentage; pH; conductivity; incumbent active dose stated as active polymer; current make-down concentration and maturation time; equipment; and the acceptance targets the duty is judged by.
ChinaPAM powder preparation runs at a 1–3 g/L recommended window, 5 g/L maximum, and no longer than 60 minutes at working concentration. Preparation concentration is not process dosage.
Before the trial, review preparation and equipment: confirm the powder wetting method and wetting time, the full maturation period before dilution to working concentration, the solution age at the point of application, and any transfer shear introduced by pumps or piping.
The trial runs on the same feed across a dose ladder rather than a single point. Both representative normal feed conditions and at least one adverse-feed condition — higher solids load, seasonal feed change or off-spec pH — must be tested. Mixing conditions must be identical across all runs. Patent-table values are not transferred as trial targets: they belong to the historical document and to the conditions it describes.
Agree acceptance metrics before the first jar: settling rate, clarity or turbidity, underflow solids, water recovery, active dose, floc shear tolerance and operability.
Go/no-go: proceed to quotation only after the exact suffix is locked and at least one tested route meets the pre-agreed same-feed acceptance targets under both normal and adverse conditions. If the suffix remains unresolved or the same-feed trial fails those targets, stop and return to diagnosis rather than naming a grade. Current price, stock status, lead time, applicable TDS and sample arrangements are confirmed in the quotation. Batch-specific COA terms are confirmed with the shipment.
Brand Equivalents & Replacements
ChinaPAM accepts a confirmed Praestol 2515 enquiry and screens its own low-charge anionic powder bracket against it. No single grade is named before the molecular-weight position is established; 1042 and 1082 are the controlled anchors at opposite MW ends. Screening by feed conditions and label confirmation comes first, then a quotation, and sample arrangements are discussed from there. Nothing on this page is a tested replacement or equivalent-performance statement: only a controlled same-feed trial can confirm whether the selected route performs on your duty.
| Brand | Grade | Notes |
|---|---|---|
| Ashland / Stockhausen Praestol | Praestol 2515 | US 2015/0284673 A1 Table 11 (2015 patent publication) lists 2515/2515TR: low anionic charge, bulk density 42 lb/ft³, solution viscosity above 2000 cP (DW) / 180 cP (brine), pH 5–12. WO 2010/006366 A1 (2010) identifies it as a weakly anionic acrylamide/sodium-acrylate copolymer. ChinaPAM offers a low-charge powder screening bracket. Bracket screening only. |
Need a replacement for a different grade? Contact us with your current product specs.
Frequently Asked Questions — Praestol 2515 Equivalent — Low-Charge Anionic PAM Grade Screening
Can ChinaPAM supply for a Praestol 2515 requirement?
Yes — ChinaPAM screens a low-charge anionic powder bracket against a Praestol 2515 requirement. Send the full label as printed, or a bag photo, and the enquiry opens. ChinaPAM will quote the screening bracket and discuss sample arrangements. No single grade is named before the molecular-weight need is confirmed, and no drop-in or identical-formula claim is made.
Why is no specific ChinaPAM grade pre-named for Praestol 2515?
Because neither accepted primary record establishes the molecular-weight position of 2515. Charge is established as low/weak anionic; MW is not. Naming a grade before the MW need is known would be a guess, not a qualified route. 1042 and 1082 are the bracket anchors that bound the low-charge axis on the ChinaPAM scale; the trial decides which end of that bracket wins on the feed.
My bags read Praestol 2515 TR — is that different from bare 2515?
2515 and 2515 TR appear in the same row of US 2015/0284673 A1 Table 11, but they remain distinct purchasing labels. Send the exact label as printed; ChinaPAM will carry the TR suffix through the enquiry unchanged. Do not drop or substitute the suffix without issuer confirmation.
The patent Example 4 uses Praestol 2515 in a lithium-brine process. Does that mean it is suited to my application?
No. WO 2010/006366 A1 Example 4 is a single patent process under the conditions that patent describes. It establishes that Praestol 2515 was used in that one context, not that it is a general-purpose grade for every briny slurry. The page cites the example because it is part of the evidence; it does not transfer that process to your feed.
Praestol 2515 and Praestol 2640 appear in the same patent table — does that mean either grade covers both enquiries?
No. US 2015/0284673 A1 Table 11 lists them in the same table, but they sit at different charge positions: 2515 at low/weakly anionic and 2640 at medium anionic. Applying 2640 selection logic to a 2515 requirement means selecting a medium-charge route without confirming the feed's actual charge demand. The two grades require separate screening paths.
What is confirmed in the quotation, and what is not stated here?
Current price, stock status, lead time, applicable TDS and sample arrangements are confirmed in the quotation. Batch-specific COA terms are confirmed with the shipment.
Trademark notice. Praestol 2515 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 separately branded ChinaPAM grades and are not licensed copies. Third-party facts on this page are attributed to US 2015/0284673 A1 and WO 2010/006366 A1, with their patent-publication role and dates preserved; the patent records are not current brand-owner specifications. Performance on your process should be confirmed by jar test or CST test before any change of supply.