A kind of preparation method of nylon salt
A technology of nylon salt and diamine salt, applied in the field of nylon salt, can solve the problems of inaccurate determination of reaction end point and unenvironmental protection, and achieve the effects of improving the quality of salt formation, saving energy consumption and saving equipment cost.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0031] Take 1mol of terephthalic acid (166g) and add it to 170g of water, start stirring until uniform, and obtain a milky white terephthalic acid-water system; weigh 2mol of sodium hydroxide (80g) and add it to 90g of water, stir until dissolved After completion, the obtained aqueous sodium hydroxide solution is poured into the terephthalic acid-water system, and stirred until a clear solution is obtained, which is aqueous sodium terephthalate solution A.
[0032] Take 1 mol of decanediamine (172 g) and add it to 200 g of water to form an aqueous solution of decanediamine; add 2 mol of hydrochloric acid (73 g) to the aqueous solution of decanediamine to form decanediamine hydrochloride solution B.
[0033] Solution A and solution B are directly mixed, and white nylon salt with equimolar ratio is precipitated immediately, centrifuged, washed, and the filtrate after centrifugation is clarified. salt), the yield was 99%.
Embodiment 2
[0035] Take 1mol of terephthalic acid (166g) and add it to 170g of water, start stirring until uniform, and obtain a milky white terephthalic acid-water system; weigh 2mol of sodium hydroxide (80g) and add it to 90g of water, stir until dissolved After completion, the obtained aqueous sodium hydroxide solution is poured into the terephthalic acid-water system, and stirred until a clear solution is obtained, which is aqueous sodium terephthalate solution A.
[0036] Take 1mol of undecyl diamine (186g) and add it to 200g of water to make an undecyl diamine aqueous solution; add 2mol of hydrochloric acid (73g) to an undecyl diamine aqueous solution to make an undecyl diamine solution Diamine hydrochloride solution B.
[0037] Solution A and solution B are directly mixed, and then a white nylon salt with equimolar ratio is precipitated, centrifuged, washed, and the filtrate after centrifugation is clarified. The whole salt-forming time is about 10 minutes. After drying, nylon salt...
Embodiment 3
[0039] Take 1mol of terephthalic acid (166g) and add it to 170g of water, start stirring until it is uniform, and obtain a milky white terephthalic acid-water system; weigh 2mol of sodium hydroxide (80g) and add it to 90g of water, and stir until the dissolution is complete , Pour the obtained sodium hydroxide aqueous solution into the terephthalic acid-water system, and stir until a clear solution is obtained, which is the aqueous sodium terephthalate solution A.
[0040] Take 1mol of dodecyl diamine (200g) and add it to 220g of water to make an aqueous solution of dodecyl diamine; add 2 mol of hydrochloric acid (73g) to an aqueous solution of dodecyl diamine to make a dodecyl diamine solution Diamine hydrochloride solution B.
[0041] Solution A and solution B are directly mixed, and white nylon salt with equimolar ratio is precipitated immediately, centrifuged, washed, and the filtrate after centrifugation is clarified. salt), the yield was 99%.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More