Fatty amine polyoxyethylene ether carboxylate and preparation method thereof

Abstract

The present invention relates to a fatty amine polyoxyethylene ether carboxylate and a preparation method thereof, wherein problems that the foaming agent has poor thermal stability, produces precipitate after contacting divalent ions, and can not meet requirements of high temperature and high salinity stratum foam flooding in the existing foam flooding enhanced oil extraction technology are mainly solved with the present invention. The technical scheme comprises that: a fatty amine polyoxyethylene ether carboxylate having a molecule general formula (I) and a preparation method thereof are adopted, wherein M is one selected from an alkali metal, an alkaline earth metal or an ammonium group, R is a C8-C40 alkyl, and the sum of m and n is an integer of 1-40. With the technical scheme, the problems in the prior art are well solved, and the fatty amine polyoxyethylene ether carboxylate can be used for foam flooding enhanced oil extraction. The formula (I) is as the follow.

Description

technical field

[0001] The invention relates to a fatty amine polyoxyethylene ether carboxylate and a preparation method thereof. Background technique

[0002] The main oilfields in my country have entered a high water cut period after primary and secondary recovery. How to improve oil recovery and maximize the development of remaining reserves, tertiary oil recovery technology has played a very important role in ensuring stable and high production of oil fields. Among new technologies for tertiary oil recovery, chemical composite flooding is still one of the most promising methods. The oil displacement mechanism is mainly that the polymer increases the viscosity of the displacement water, reduces the oil-water mobility ratio, alleviates the channeling phenomenon, and improves the sweeping efficiency; the surfactant and the alkali reduce the oil / water interfacial tension, increase the capillary number, and promote the self-sustainability of crude oil. Desorption and effecti...

Examples

Embodiment 1

[0025] Synthesis of Dodecylamine Polyoxyethylene (7) Ether Carboxylate

[0026] (1) Add 93g (0.5 moles) of dodecylamine and 1% potassium hydroxide catalyst of amine weight to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 80-90°C, and turn on Vacuum system, dehydrated under high vacuum for 1 hour, then purged with nitrogen for 3 to 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 154g of ethylene oxide, controlling the pressure from 0.1 to 1.0MPa, temperature 120-180°C, carry out alkoxylation reaction; after the reaction, remove unreacted ethylene oxide, neutralize after cooling, decolorize, filter, and dehydrate to obtain dodecylamine polyoxyethylene (7) ether.

[0027] (2) 240 g (0.5 moles) of dodecylamine polyoxyethylene (7) ether synthesized in step (1) was started to heat up the stirring device to 70° C. and slowly added dropwise an ...

Embodiment 2

[0031] Synthesis of Dodecylamine Polyoxyethylene (3) Ether Carboxylate

[0032] (1) Add 93g (0.5 moles) of dodecylamine and 1% potassium hydroxide catalyst of amine weight to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 80-90°C, and turn on Vacuum system, dehydrated under high vacuum for 1 hour, then purged with nitrogen for 3 to 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 70g of ethylene oxide, controlling the pressure from 0.1 to 1.0MPa, temperature 120-180°C, carry out alkoxylation reaction; after the reaction, remove unreacted ethylene oxide, neutralize after cooling, decolorize, filter, and dehydrate to obtain dodecylamine polyoxyethylene (3) ether.

[0033](2) 160 g (0.5 moles) of dodecylamine polyoxyethylene (3) ether synthesized in step (1) was started to heat up the stirring device to 60° C. and slowly added dropwise an aq...

Embodiment 3

[0036] Synthesis of octadecylamine polyoxyethylene (20) ether carboxylate

[0037] (1) Add 135g (0.5 moles) of octadecylamine and potassium hydroxide catalyst with 1% weight of amine to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 80-90°C, and turn on Vacuum system, dehydrated under high vacuum for 1 hour, then purged with nitrogen for 3 to 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 440g of ethylene oxide, controlling the pressure from 0.1 to 1.0MPa, temperature 120-180°C, carry out alkoxylation reaction; after the reaction, remove unreacted ethylene oxide, neutralize after cooling, decolorize, filter, and dehydrate to obtain octadecylamine polyoxyethylene (20) ether.

[0038] (2) 570 g (0.5 mole) of stearylamine polyoxyethylene (20) ether synthesized in step (1) was started to heat up the stirring device to 80° C. and slowly adde...

technical field

[0001] The invention relates to a fatty amine polyoxyethylene ether carboxylate and a preparation method thereof. Background technique

[0002] The main oilfields in my country have entered a high water cut period after primary and secondary recovery. How to improve oil recovery and maximize the development of remaining reserves, tertiary oil recovery technology has played a very important role in ensuring stable and high production of oil fields. Among new technologies for tertiary oil recovery, chemical composite flooding is still one of the most promising methods. The oil displacement mechanism is mainly that the polymer increases the viscosity of the displacement water, reduces the oil-water mobility ratio, alleviates the channeling phenomenon, and improves the sweeping efficiency; the surfactant and the alkali reduce the oil / water interfacial tension, increase the capillary number, and promote the self-sustainability of crude oil. Desorption and effecti...

Examples

Embodiment 1

[0025] Synthesis of Dodecylamine Polyoxyethylene (7) Ether Carboxylate

[0026] (1) Add 93g (0.5 moles) of dodecylamine and 1% potassium hydroxide catalyst of amine weight to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 80-90°C, and turn on Vacuum system, dehydrated under high vacuum for 1 hour, then purged with nitrogen for 3 to 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 154g of ethylene oxide, controlling the pressure from 0.1 to 1.0MPa, temperature 120-180°C, carry out alkoxylation reaction; after the reaction, remove unreacted ethylene oxide, neutralize after cooling, decolorize, filter, and dehydrate to obtain dodecylamine polyoxyethylene (7) ether.

[0027] (2) 240 g (0.5 moles) of dodecylamine polyoxyethylene (7) ether synthesized in step (1) was started to heat up the stirring device to 70° C. and slowly added dropwise an ...

Embodiment 2

[0031] Synthesis of Dodecylamine Polyoxyethylene (3) Ether Carboxylate

[0032] (1) Add 93g (0.5 moles) of dodecylamine and 1% potassium hydroxide catalyst of amine weight to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 80-90°C, and turn on Vacuum system, dehydrated under high vacuum for 1 hour, then purged with nitrogen for 3 to 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 70g of ethylene oxide, controlling the pressure from 0.1 to 1.0MPa, temperature 120-180°C, carry out alkoxylation reaction; after the reaction, remove unreacted ethylene oxide, neutralize after cooling, decolorize, filter, and dehydrate to obtain dodecylamine polyoxyethylene (3) ether.

[0033](2) 160 g (0.5 moles) of dodecylamine polyoxyethylene (3) ether synthesized in step (1) was started to heat up the stirring device to 60° C. and slowly added dropwise an aq...

Embodiment 3

[0036] Synthesis of octadecylamine polyoxyethylene (20) ether carboxylate

[0037] (1) Add 135g (0.5 moles) of octadecylamine and potassium hydroxide catalyst with 1% weight of amine to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 80-90°C, and turn on Vacuum system, dehydrated under high vacuum for 1 hour, then purged with nitrogen for 3 to 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 440g of ethylene oxide, controlling the pressure from 0.1 to 1.0MPa, temperature 120-180°C, carry out alkoxylation reaction; after the reaction, remove unreacted ethylene oxide, neutralize after cooling, decolorize, filter, and dehydrate to obtain octadecylamine polyoxyethylene (20) ether.

[0038] (2) 570 g (0.5 mole) of stearylamine polyoxyethylene (20) ether synthesized in step (1) was started to heat up the stirring device to 80° C. and slowly adde...

Images