53results about How to "Act as a solvent" patented technology

The invention provides a synthesis method for amphoteric ion modified starch for a well drilling fluid, wherein the synthesis method comprises the steps: weighing dimethylaminoethyl methacrylate and 1,3-propanesultone with the mass ratio of 2:1 to 9:1, adding 1,3-propanesultone to dimethylaminoethyl methacrylate, after reaction, filtering, extracting, and drying to obtain DMAPS; adding water to starch, stirring to obtain gelatinized starch, introducing N2, carrying out a reaction, and then adding an initiator; and dissolving acrylamide and DMAPS with a solvent, adding into the gelatinized starch after treatment, carrying out a reaction for 4-6 h at the temperature of 60-80 DEG C, to obtain a colloidal solid, cleaning with acetone to obtain a white precipitate, and finally drying and crushing to obtain the amphoteric ion modified starch. The modified starch obtained by the method can resist NaCl saturation and resist high content of CaCl2, has the filtrate loss reduction amount of a polymer decreased along with the increase of the salt content, and besides has the advantages of excellent shale inhibition performance.

The invention provides a water base drilling fluid, and a preparation method and application thereof. The drilling fluid comprises water, a zwitterionic polymer, anhydrous calcium chloride, a soil phase, and a flow pattern regulator, wherein, based on the weight of water, the usage amount of the zwitterionic polymer is 0.5 to 5 wt% of the usage amount of the water; the usage amount of the anhydrous calcium chloride is 20 to 70 wt% of the usage amount of the water; the usage amount of the soil phase is 0 to 6 wt% of the usage amount of the water; and the usage amount of the flow pattern regulator is 0.1 to 0.4 wt% of the usage amount of the water. The invention also provides a preparation method and application for the water base drilling fluid. According to the invention, through synergistic effects of the calcium chloride and the zwitterionic polymer, the water base drilling fluid in the invention has excellent rheological performance, filtration loss control performance, inhibition performance, sealing performance and lubrication performance.

The invention provides a synthesis method for an amphoteric ion copolymer for a well drilling fluid, wherein the synthesis method comprises the steps: weighing dimethylaminoethyl methacrylate and 1,3-propanesultone with the mass ratio of 2:1 to 9:1, adding 1,3-propanesultone to dimethylaminoethyl methacrylate, after reaction, filtering, extracting, and drying to obtain DMAPS; adding the obtained DMAPS and AM into a solvent, dissolving, then transferring into a reactor, next introducing N2, carrying out a deoxidization reaction, at the same time, heating up to 50-70 DEG C, then adding an initiator, carrying out a reaction to obtain a colloidal solid, and precipitating with acetone to obtain a white precipitate; and drying the obtained precipitate, and then crushing to finally obtain the amphoteric ion copolymer. The copolymer obtained by the method can sustain a temperature as high as 150 DEG C, resists NaCl saturation, resists CaCl2 saturation, has the filtrate loss reduction amount of a polymer decreased along with the increase of the salt content, and besides has the advantages of excellent shale inhibition performance.

The invention discloses a synthesis method of m-phenoxytoluene, relating to a synthesis method of a compound. The synthesis method comprises the following steps of: stirring and mixing m-chlorotoluene, sodium phenate, cuprous chloride, 8-oxyquinoline and polydiglycol in a reaction container at the room temperature, heating until the temperature of mixed liquor is 130-140 DEG C and then reacting for 8-9 hours under thermal-insulation stirring; finally, carrying out high-vacuum reduced pressure distillation and getting 100-110 DEG C of distillates to obtain the m-phenoxytoluene. In the invention, under the catalytic action of the cuprous chloride, the 8-oxyquinoline and the polydiglycol, the sodium phenate and the m-chlorotoluene are directly taken as raw materials to carry out single-step reaction to prepare the m-phenoxytoluene, wherein the m-chlorotoluene is a reactant and meanwhile takes the solvent action so that any solvent does not need to be additionally used, thereby greatly reducing cost.

The present invention provides a high-efficiency water-based drilling fluid and its synthesis method and application. The drilling fluid includes water, zwitterionic polymer, anhydrous calcium chloride, soil phase, and a flow regulator. Wherein, the weight of water is Benchmark, the dosage of zwitterionic polymer is 0.5-5wt% of water consumption, the dosage of anhydrous calcium chloride is 20-70wt% of water consumption, the dosage of soil phase is 0-6wt% of water consumption, and the dosage of flow pattern regulator is water 0.1‑0.4wt% of the dosage. The invention also provides a synthesis method and application of water-based drilling fluid. Through the synergistic effect of the calcium chloride and the zwitterionic polymer, the drilling fluid of the invention has excellent rheological properties, fluid loss control performance, inhibition performance, plugging performance and lubricating performance.

The invention relates to a preparing method for starch sulphate ammonium salt.The preparing method specifically comprises the steps that in a kneading machine, a starch sugar unit is put into sulfamic acid at the mole ratio of the starch sugar unit to sulfamic acid being 1:0.5-1:1.5, and a catalyst is put into the mixture at the mole ratio of the starch sugar unit to the catalyst being 1:0.25-1:1.5; the mixture is mixed and heated to 100-150 DEG C, starch is put into the mixture after the mixture is completely melt at the mole ratio of the starch sugar unit to starch being 1:1, a reaction is carried out at a constant temperature until no water vapor is generated in a reaction kettle, and then the mixture is cooled to the room temperature; ammonium hydroxide is used for neutralizing acid remaining in the reaction system to reach the pH of 8-10, ethyl alcohol with the purity of 95% is added to separate precipitate out, centrifugal separation is carried out at the centrifugal speed of 3500-9000 turns / min, drying is carried out at 40-50 DEG C, and a starch sulphate ammonium salt product is obtained.By means of the preparing method, the sulfonation degree of the product is increased, strong degradation on starch and the strong corrosion effect on equipment can be avoided by means of the adopted raw materials, and the preparing method has the advantages that operation is convenient, production cost is reduced while environment pollution is relieved, and the raw material cost and the requirement for equipment are low.

The invention provides a novel method for preparing betamethasone ketal by homogeneous reaction at normal temperature, which comprises the steps of: adding reagents of dichloromethane, triethyl orthoformate and boron fluoride etherate in a normal temperature homogeneous system; carrying out condensation reaction through Platts oxides and ethanediol to prepare betamethasone ketal; reacting for 2-15h, condensing filtrate again, extracting semi-condensed materials, and again putting the materials. The product content is not less than 90 percent and the yield is 115-118 percent. Compared with thetraditional process, the method has the advantages of shortening the reaction time, improving the content and the yield of the betamethasone ketal, reducing the environment pollution, discarding the benzene with huge hurt on the human body and the environment, ensuring that the production process is more environmentally friendly, lowering the labor intensity of workers, generating better social benefit, and being more beneficial to the massive industrialized production.

The invention discloses an organic waste gas adsorbent, which comprises active semi-coke as a carrier and divinylbenzene as a load, wherein the mass of active semi-coke accounts for 88-95% of the total mass of the adsorbent, and the mass of divinylbenzene accounts for 88% to 95% of the total mass of the adsorbent. The percentage of the total mass is 5-12%. The organic waste gas adsorbent loaded with divinylbenzene is obtained by impregnating the coupling agent and divinylbenzene with active semi-coke. The present invention uses activated semi-coke as a carrier, which has sufficient channels and low cost. Divinylbenzene is loaded by layer-by-layer assembly, and divinylbenzene is loaded on the inner and outer surfaces of the active semi-coke channels. Divinylbenzene not only serves as the supply part The strength support of the active semi-coke carrier. In addition, divinylbenzene can not only be used as an adsorption center after being carried on the active semi-coke, but also can act like a solvent to dissolve organic waste gas in the divinylbenzene layer.

The invention discloses a method for preparing flower-like AuPt alloy nanoparticles in a deep eutectic solvent with simple synthesis process, green reaction system and mild reaction conditions, and electrooxidative synthesis using the prepared flower-like AuPt alloy nanoparticles to modify electrodes. A new method of xanthone, this new electro-organic synthesis method is carried out at room temperature and in an open environment, the reaction conditions are very mild and environmentally friendly, and the yield of synthetic xanthone is high.

The invention provides a synthesis method for an amphoteric ion copolymer for a well drilling fluid, wherein the synthesis method comprises the steps: respectively weighing N,N-dimethylallylamine and 1,3-propanesultone with the molar ratio of 2:1 to 8:1, adding 1,3-propanesultone to N,N-dimethylallylamine, carrying out a reaction for 0.5-4 h at the temperature of 10-60 DEG C, finally, filtering, extracting, and drying to obtain N,N-dimethylallyl propanesulfonate (DAPS); adding the obtained DAPS and AM into a solvent, dissolving, then transferring into a reactor, then introducing N2, carrying out a deoxygenation reaction, next adding an initiator, carrying out a reaction to obtain a colloidal solid, and precipitating with acetone to obtain a white precipitate; and drying the obtained precipitate, and then crushing to obtain the amphoteric ion copolymer. The copolymer obtained by the method can sustain a temperature as high as 180 DEG C, resists NaCl saturation, resists CaCl2 saturation, has the filtrate loss reduction amount of a polymer decreased along with the increase of the salt content, and besides has the advantages of excellent shale inhibition performance.

The invention discloses a preparation method of N,N-dimethylallyl propanesulfonate, and is characterized in that the preparation method includes the following contents: firstly, respectively weighing N,N-dimethylallylamine and 1,3-propanesultone with the molar ratio of 2:1-8:1, and adding 1,3-propanesultone to N,N-dimethylallylamine; then at the temperature of 10 DEG C-60 DEG C, carrying out a reaction for 0.5-4 h; and finally, filtering, extracting, and drying to obtain N,N-dimethylallyl propanesulfonate. The method has the advantages of no need of use of a solvent, short reaction time and high product yield and is suitable for industrial application.