How is the dissolution time of polyoxymethylene determined in the glyphosate industry?
Thread Content
I’ve just entered this industry and I’m not sure how to determine the dissolution time of polyoxymethylene in the glyphosate industry I hope the experts will be kind enough to share their insights. Thank you
Sample taken from the glass bottle; visual inspection shows it is clear and transparent, with no suspended particles or sediment
40 degrees, 50 minutes is enough
Reply to 2# fuhuaxmb: Should it be dissolved directly in water? Is it not necessary to add any other additives or similar substances to help with dissolution?
Can it be depolymerized using water directly? The original poster should take a look at the relevant materials first.
Could LSD provide some relevant information? Thank you so much!
The depolymerization process requires adjustments depending on the origin of the polyformaldehyde; for example, there is a significant difference between domestically produced polyformaldehyde and that imported from Europe. However, due to cost considerations, imported polyformaldehyde is now rarely used. Sampling for visual inspection is highly unscientific, as paraformaldehyde can dissolve in methanol when its degree of polymerization is 3 or less. Moreover, depolymerization and dissolution are two completely different concepts, and this must be clearly understood. The formaldehyde that dissolves in methanol during oligomerization actually cannot participate in the chemical reactions we need.
Depolymerization test: Methanol was added to a 1000-milliliter reaction flask equipped with a stirrer and a reflux condenser; the stirrer was started, then polyformaldehyde triethylamine was added. The mixture was heated in a water bath to 42 degrees Celsius, and the reaction proceeded at that temperature. The reaction mixture should be transparent within 30 minutes.
Reply to 9# Immortal Legend: Could you please ask again what is the amount of methanol added? What is the amount of triethylamine? What is the specific addition ratio? Thank you!
Will posting too many posts get them deleted? Will posting too many posts get them deleted? Will posting too many posts get them deleted? Will posting too many posts get them deleted? Will posting too many posts get them deleted? Will posting too many posts get them deleted?
@jxjlhgwf (540207) The requirements for the depolymerization process vary depending on the origin of the polyformaldehyde; for example, there is a significant difference between domestically produced polyformaldehyde and that imported from Europe. However, due to price considerations, imported polyformaldehyde is now rarely used. Sampling for visual inspection is highly unscientific, as paraformaldehyde can dissolve in methanol when its degree of polymerization is 3 or less. Moreover, depolymerization and dissolution are two completely different concepts, and this must be clearly understood. The formaldehyde that dissolves in methanol during oligomerization actually cannot participate in the chemical reactions we need. Could you go into more detail on depolymerization and dissolution?