Hard-to-Filter & Chemical
C12 Process Media Filtration
Petrochemical Process Media Purification
Key outcomes
- Catalyst life extended approximately 40%: downstream catalyst service life extended approximately 40% (customer feedback)
- Improved product purity: improve process product purity, reduce impurity content
- Reduced unplanned shutdowns: reduce unplanned process shutdowns caused by impurities
Case Study
Stage 1 · Customer Problem
Customer Background & Pain Points
A large-scale petrochemical integrated enterprise requires high-standard physical purification of the circulating or reaction medium C12 (C12 alkane/olefin) in certain fine chemical processes (such as alkylbenzene production or detergent raw material processing) to ensure the efficiency of subsequent chemical reactions. In the petrochemical process circulation, C12 media quality directly affects production benefits.
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Catalyst Poisoning & Coking
If the media contains fine solid particles (upstream corrosion products or catalyst fragments), it blocks downstream fixed-bed reactors, causing catalyst activity decline.
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Product Color & Indicator Control
Trace impurities under high-temperature reactions may cause the final product color to exceed standards, affecting the grade evaluation of fine chemical products.
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High-Flow Interception Bottleneck
The process requires maintaining high single-pass filtration efficiency at 30m³/h flow rate; ordinary commercial filter units struggle to maintain precision under high differential pressure and high flow.
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Chemical Compatibility Requirements
C12 is an organic medium with specific chemical corrosion resistance requirements for seals and filter cartridge materials.
Stage 2 · Process Media Clarity Analysis · NEW
C12 Process Media Laboratory Analysis
Samples of the C12 circulating/reaction medium were taken upstream of the fixed-bed reactor to characterize the main contamination categories affecting catalyst life and product purity.
| Metric | Before Filtration | Target / After Filtration | Improvement |
|---|
| Particle count (ISO 4406) | ~23/21/18 | ~15/13/10 | ~3 ISO codes lower |
| Solid impurities (catalyst fragments, corrosion products) | Visible fines, 5–50 μm | Intercepted at 5–10 μm, β₅ ≥200 | Single-pass capture |
| Free water content | Trace emulsified water | Coalesced & separated | Reduced emulsion risk |
| Process media clarity | Slightly hazy under high temperature | Clear, transparent | Color/spec compliance |
| Catalyst bed differential pressure | Rising trend (coking) | Stable, low ΔP | Extended run length |
Note: ISO 4406 codes are indicative for the solid particulate load carried by the organic process medium; actual values depend on sampling point and upstream unit operation.
Stage 3 · Solution
30m³/h Dedicated Process Purification Unit
A 30m³/h dedicated process purification unit was developed for the enterprise's specific operating conditions. Custom high-precision filter cartridges (5–10 μm, β₅ ≥200) intercept micron-level impurities in the C12 media, protecting downstream catalytic reactors. The entire unit uses 316L stainless steel with fluororubber (FKM) or PTFE seals, ensuring no swelling or leakage under long-term organic media contact. A dual parallel structure (N+1 redundancy) supports filter cartridge maintenance or online monitoring without interrupting the production process.
Filtration Precision
5–10 μm, β₅ ≥200
Wetted Material
316L Stainless Steel
System Architecture
Dual parallel (N+1)
Pressure Vessel Standard
GB/T 150
Electrical Rating
Ex explosion-proof
Regeneration
Gas-pulse regeneration (brief 5-15 min safety pause)
Stage 4 · Results
Outcomes & Performance
The 30m³/h custom process purification unit provided the C12 process line with the required purification precision, ensuring the continuity of chemical reactions and protecting downstream catalysts. High-precision filtration effectively intercepted micron-level impurities, improving product purity and reducing impurity content. According to customer feedback, downstream catalyst service life was extended approximately 40%, and unplanned process shutdowns caused by impurities were effectively reduced.
~40%
Catalyst Life Extended
5–10 μm
Filtration Precision
| Indicator | Before | After | Result |
|---|
| Downstream catalyst service life | Baseline | Extended ~40% | Customer feedback |
| Process product purity | Impurity content elevated | Improved, reduced impurities | Grade compliance |
| Unplanned process shutdowns | Frequent (impurity-triggered) | Effectively reduced | Continuity secured |
| Particle count (ISO 4406) | ~23/21/18 | ~15/13/10 | ~3 codes lower |
| System differential pressure | Rising under high flow | Stable, low ΔP | Process balance kept |
Stage 5 · Lessons Learned · NEW
Key Takeaways for Hard-to-Filter & Chemical Applications
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Chemical Compatibility First
For organic process media like C12, specifying 316L wetted parts with FKM/PTFE seals upfront prevents swelling, leakage and cross-contamination over long service campaigns — a non-negotiable baseline for petrochemical service.
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High-Flow Precision Is a System Problem
Holding 5–10 μm, β₅ ≥200 at 30m³/h is beyond ordinary commercial filters. Optimized fluid dynamics and gas-pulse regeneration (sequential group processing ~32–64s/group) are required to keep ΔP stable without sacrificing single-pass efficiency.
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Dual Parallel Redundancy for Continuity
N+1 dual parallel design lets operators swap cartridges or run online monitoring with brief 5-15 min safety pause the process — the decisive factor in protecting catalyst life and avoiding unplanned shutdowns in continuous petrochemical production.
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Customer feedback
In petrochemical processes, tiny impurities can cause significant losses. This 30m³/h custom unit provides the required purification precision for our C12 process line. This is not just filtration — it is ensuring chemical reaction continuity and protecting catalysts. The equipment's stability meets our expectations.
Hard-to-Filter & Chemical
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