Method for preparing thick oil demulsifier
A technology of demulsifier and heavy oil, which is applied in the field of preparation of heavy oil demulsifier to improve the temperature resistance and demulsification effect
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[0009] The preparation method of a kind of heavy oil demulsifier provided by the embodiment of the present invention may comprise the following steps:
[0010] Step S1, the synthesis of block polyether, concrete synthesis is as follows:
[0011] Firstly, the prepared phenolic amine resin or polyene polyamine and catalyst are added into a closed pressure-resistant reactor filled with nitrogen, and the temperature is raised to 90-150° C. under stirring conditions.
[0012] Secondly, alternately add propylene oxide and ethylene oxide respectively, control the temperature between 90-150°C, and carry out the polymerization reaction at a pressure range of 0.2-0.6Mpa. After the polymerization reaction, the pressure in the reactor does not drop anymore, which means the reaction is complete. , to obtain multi-block macromolecular polyether. Multi-block macromolecular polyethers include polyether FA or polyether AE.
[0013] The polyether FA is composed of phenolic amine resin, propyl...
Embodiment 1
[0023] Weigh 30g of polyether AE and 10g of polyether FA into a 500ml four-necked bottle with a stirring rod, condenser, thermometer and sampling funnel, add 60ml of chloroform, stir evenly, cool down to 0°C with an ice-water bath, and weigh chlorosulfur Add 5.8 g of acid slowly into the four-neck flask with a sample addition funnel, and control the temperature at 10°C during the sample addition process. After the dropwise addition was completed, the temperature was raised to 40° C. to react for 1 hour. The solvent was evaporated under reduced pressure for use.
[0024] R(CH 2 CH 2 O) n H+HSO 3 Cl→R(CH 2 CH 2 O) SO 3 H+HCl;
[0025] Add 60ml of xylene to the four-neck bottle where the solvent has been evaporated, stir evenly, cool down to 0°C with an ice-water bath, add an appropriate amount of potassium hydroxide to adjust the pH value to about 8, weigh 1.2g of toluene diisocyanate, and slowly Add it to a four-necked bottle, and control the temperature at 5°C during ...
Embodiment 2
[0027] Weigh 35g of polyether AE and 5g of FA into a pressure-resistant reactor equipped with a stirring bar, vent pipe and thermometer, weigh 2.0g of sulfamic acid, and add 1.0g of urea into the reactor at the same time. Nitrogen was blown three times, the reactor was closed, the temperature was raised to 120°C while stirring, and the reaction was carried out at a constant temperature of 120°C for 6 hours. Cool down and take out for use.
[0028] R(CH 2 CH 2 O) n H+H 2 NSO 3 H→R(CH 2 CH 2 O) OSO 3 NH 4 ;
[0029] Add 40g of the product from the previous step into a 500ml four-necked bottle with a stirring rod, condenser, thermometer and funnel, add 60ml of xylene, stir evenly, cool down to 0°C with an ice-water bath, add an appropriate amount of potassium hydroxide to adjust the pH value Weigh 14g of toluene diisocyanate at about 8, and slowly add it into the four-necked bottle with the addition funnel, and control the temperature at 10°C during the addition process...
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