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Alkanolamide
[Structural formula]
Wherein, R is at C .
[Physical and chemical properties] Alkanolamide, also known as detergent 6501, coconut acid diethanolamine condensate, foam stabilizing detergent CD-110, presents various appearances according to the composition and preparation method of fatty acid and alcohol amine
[Preparation method] Fatty acid alkanolamide type nonionic surfactants have the characteristics of foam stabilization and viscosity increasing, which can improve the decontamination ability and dirt-carrying performance of detergents, and have a good deoiling effect
(1) The preparation methods of fatty acid alkanolamide include direct method and lactide method
It can also be prepared by the reaction of fatty acid and ethanolamine
(2) Coconut oil is traditionally used to synthesize alkanolamides.
Add cotton oil and methanol [molar ratio 1: (3～4)] into the reactor, put in the calculated amount of potassium hydroxide , control the reaction temperature at 50～60℃, reflux for 1.
Put methyl cottonoleate and diethanolamine with a molar ratio of 1:1.
[Application] Alkanolamide has excellent penetrating power, cleaning power and foaming power, and it has an excellent synergistic effect when used in conjunction with other surfactants
Dissolve each component in water according to the formula amount, and clean it cyclically at 50～60℃ for 6～8h, then the greasy dirt in the system will be removed
In addition, in order to accelerate the penetration of the acidic cleaning solution in the hard and dense scale, a surfactant can also be used
Calculate the required amount of each component according to the formula and the amount of system scale, inject it into the cleaning system and circulate it with a pump, heat the water to 60℃ with steam, add the required amount of corrosion inhibitor and circulate evenly, and then add the required amount The sulfamic acid is circulated uniformly, the required amount of alkanolamide is added, and the cycle is cleaned until the cleaning end is reached
