Tannery process with effluent recycling
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 3, 2017
Issued Date -
N/A
app pub date -
Mar 20, 2014
filing date -
Dec 4, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A recycling process for achieving near-zero emissions of tannery effluent is characterized in that effluent recycling is carried out independently in soaking, liming, re-liming, de-liming bating, pickling chrome tanning, re-tanning, neutralizing, and dyeing procedures. The effluents in the above procedures can be recycled in each step. This process greatly reduces effluent discharge and helps solve the problem of tanning pollution. The process also improves the quality of the finished leather, effectively decreases loose grain rate and increases compactness and fullness of the finished product. The project can reduce chemical material consumption by 15%-55%. For example, the consumption of chromium powder can be reduced up to 65%. Consumption of other chemical materials can be reduced by more than 90%, while certain chemical materials can be essentially completely conserved.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- C14C Class
- 16 Applications Filed
- 14 Patents Issued To-Date
- 87.50 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C14C Class
- 0 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Apr 3, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 3, 2029 |
