Water-in-oil type polyamide emulsifier for drilling fluid and synthetizing method thereof
A water-in-oil type, synthetic method technology, applied in chemical instruments and methods, drilling compositions, preparation of carboxylic acid amides, etc. Small, solve the effect of poor rheological properties and good rheological properties
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[0018] Specific embodiment 1: In this embodiment, a water-in-oil polyamide emulsifier for drilling fluid is prepared by using N-methyl-1,3-propanediamine, oleic acid and maleic anhydride as raw materials. The name is N,N-methyl maleic carboxylate alkylamidopropyl tertiary amine, and the general structural formula is HOOC-CH=CH-CO-N(CH 3 )-(CH 2 ) 3 -NH-CO-R; where R is CH 3 (CH 2 ) 2 -CH=CH-(CH 2 ) 7 -.
Example Embodiment
[0019] Specific embodiment two: this embodiment is different from specific embodiment one in that: the synthesis method of the water-in-oil polyamide emulsifier for drilling fluid is carried out according to the following steps:
[0020] 1. Add N-methyl-1,3-propanediamine and oleic acid to the three-necked flask, fix the three-necked flask in the electric heating mantle, insert the stirring rod into the straight mouth of the three-necked flask, fix the stirring device, three-necked flask The other two ports of the bottle are respectively equipped with a thermometer and a water separator, and the temperature is increased from room temperature to 100℃~110℃ under stirring conditions. After holding for 1 hour, the temperature is then increased from 100℃~110℃ to 150℃ ~170℃, keep for 10h~17h to obtain N-methylalkylamidopropyl secondary amine; the molar ratio of N-methyl-1,3-propanediamine to oleic acid is (0.6~1.2):1 ; The N-methyl-1,3-propanediamine structural formula is CH 3 -NH-(CH ...
Example Embodiment
[0029] Specific embodiment three: This embodiment is different from specific embodiment one or two in that: in step one, the temperature is increased from 110°C to 160°C. Others are the same as the first or second embodiment.
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