Novel lignin-based water-in-oil emulsion demulsifier, preparation method thereof and treatment method of crude oil water-in-oil emulsion
A lignin-based, water-in-oil technology, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of poor demulsification effect and large dosage, so as to enhance the affinity, enhance the surface activity, and improve the broad-spectrum performance effect
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[0024] According to the second aspect of the present invention, the present invention provides a preparation method of the above-mentioned novel lignin-based water-in-oil emulsion breaker, the preparation method comprising: in the presence of an initiator and a solvent, enzymatically hydrolyzing lignin, hydrophobic The solution radical polymerization reaction of the body and the hydrophilic monomer was carried out to prepare the acrylate copolymer.
[0025] In the present invention, in the enzymatic lignin: lignin content ≥ 90 wt%, residual sugar content ≤ 5 wt%, ash content ≤ 5 wt%, phenolic hydroxyl content ≥ 10 wt%.
[0026] The hydrophobic monomer may be selected from one or more of butyl acrylate, methyl methacrylate, 2-ethylhexyl acrylate and lauryl acrylate.
[0027] The hydrophilic monomer may be acrylic acid or methacrylic acid.
[0028] Preferably, the initiator includes initiator A and initiator B;
[0029] Described initiator A is calcium chloride and hydrogen pe...
Embodiment approach
[0037] According to a preferred embodiment of the present invention, the preparation method comprises the following steps:
[0038] 1) dissolving part of the hydrophobic monomer in part of the solvent to prepare a hydrophobic monomer solution;
[0039] 2) dissolving enzymatic lignin and initiator A in a part of the solvent to prepare an enzymatic lignin solution;
[0040] 3) Under nitrogen protection, heat up the hydrophobic monomer solution and the enzymatic lignin solution to activate respectively, then mix the hydrophobic monomer solution and the enzymatic lignin solution, and add part of the initiator B to react;
[0041] 4) mix part of the hydrophobic monomer, part of the hydrophilic monomer, part of the initiator B and part of the solvent, and add it to the reaction system obtained in step 3) to react;
[0042] 5) Mix the remaining reactive monomers, initiator B and solvent evenly, and add them to the reaction system obtained in step 4) for reaction, the reactive monome...
Embodiment 1
[0062] A preparation method of a novel lignin-based water-in-oil emulsion breaker, comprising the following steps:
[0063] Step 1: Weigh 15 grams of hydrophobic monomers (10 grams of butyl acrylate and 5 grams of methyl methacrylate) and 25 grams of N,N-dimethylformamide into Reactor 1 and stir until completely dissolved.
[0064] Step 2: Weigh 1.6 grams of enzymatic lignin, 0.2 grams of calcium chloride, 0.2 grams of hydrogen peroxide and 10 grams of N,N-dimethylformamide into the reactor 2, stir well until completely dissolved.
[0065] Step 3, replace the air in reactors 1 and 2 with nitrogen and continuously feed nitrogen, heat reactor 1 to 80°C, and reactor 2 to 50°C. After 20 minutes, add the mixture in Reactor 2 into Reactor 1, stir well and mix well. Continue to feed nitrogen into reactor 1, add 0.14 g of benzoyl peroxide to start the reaction. The reaction was carried out at 80° C. for 1 hour.
[0066] Step 4, weigh 2 grams of hydrophobic monomer (butyl acrylate),...
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