成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List N,N,N',N'-TETRA(N-PROPYL)METHYLENEDIAMINE
10333-53-6

N,N,N',N'-TETRA(N-PROPYL)METHYLENEDIAMINE synthesis

5synthesis methods
-

Yield:10333-53-6 93.93%

Reaction Conditions:

at 120; for 2 h;Time;

Steps:

2 Example 2

Equipped with a blender,Thermometer and water separator in a 1000mL three-necked flask was added 444g of di-n-propylamineAnd 64g of 94% paraformaldehyde, with constant stirring, heated to 120 dehydration condensation reaction,The reaction was evaporated to dryness (about 2h), the reaction was completed. About 50g of di-n-propylamine is distilled off excessively under normal pressure,Then vacuum distillation, collecting 100 ~ 110 / 20mmHg) fraction,To obtain bis (di-n-propylamino) methane 402g (theoretical 428g),Yield 93.93%, content 98.9%.

References:

CN106632111,2017,A Location in patent:Paragraph 0027; 0028; 0029; 0030; 0031; 0032; 0049; 0051

N,N,N',N'-TETRA(N-PROPYL)METHYLENEDIAMINE Related Search: