SurTec® 941
Membrane Cleaner
for Micro- and Ultrafiltration Membranes
Properties
powder
alkaline
free of silicates
free of complexing agents
suited for all types of membranes
free of EDTA and NTA
Application
SurTec 941 is used for rinsing and pore clearing of micro- and ultrafiltration membranes
in case of decreasing efficiency of the membranes.
make-up value: 1% (0.5-3 %)
temperature: room temperature up to 90°C
application time: according to requirements
Technical Specification
(at 20°C) Appearance Bulk density (kg/l) pH-value (at 10 g/l)
SurTec 941 powder, white-brownish approx. 0.910 approx. 11.5
Maintenance and Analysis
Analyse and adjust the concentration of SurTec 941 regularly.
Sample Preparation
Take a sample at a homogeneously mixed position. Let it cool down to room temperature.
If the sample is turbid, let the turbidity settle down and decant or filter the solution.
SurTec 941 – Analysis by Titration
reagents: 1 N hydrochloric or sulfuric acid
indicator: methyl orange solution (0.04 %)
procedure: 1. Pipette 50 ml bath sample into a 250 ml Erlenmeyer flask.
2. Dilute to approx. 100 ml with deionised water.
3. Add 3 drops of indicator.
4. Titrate with 1 N acid from yellow to red.
calculation: consumption in ml · 0.21 = % SurTec 941
Ingredients
sodium hydroxide
carbonates
phosphates
nonionic surfactants
anionic surfactants
Stock Keeping
In order to prevent delays in the production process, per 1,000 l bath the following
amount should be kept in stock:
SurTec 941 25 kg
Product Safety and Ecology
The safety instructions and the instructions for environmental protection have to be
followed in order to avoid hazards for people and environment. The Material Safety Data
Sheets (according to European legislation) contain explicit details for this.
The following hazard designations and classifications into water hazard classes (WHC)
have to be taken into account:
product hazard designation water hazard class
SurTec 941 C - Corrosive WHC 2
Warranty
We are responsible for our products in the context of the valid legal regulations. The
warranty exclusively accesses for the delivered state of a product. Warranties and claims
for damages after the subsequent treatment of our products do not exist. For details
please consider our general terms and conditions.
Further Information and Contact
In our forum, you can discuss topics of the surface technology:
http://forum.SurTec.com/
If you have any questions concerning the process, please contact your local technical
department: http://SurTec.com/International.html
30 June 2011/DK, UK
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