6results about How to "Strong emulsifying ability" patented technology

The invention provides a graphene oxide composite oil-displacing agent and a preparation method and application thereof.The graphene oxide composite oil-displacing agent is prepared from poly (3-hydroxytyramine) and graphene oxide, the poly (3-hydroxytyramine) and the graphene oxide are combined through chemical bonds, the preparation method comprises the steps that hydrochloric acid 3-hydroxytyramine and the graphene oxide are subjected to a mixed reaction, and the graphene oxide composite oil-displacing agent is obtained. The obtained composite oil-displacing agent is applied to tertiary oil recovery. The composite oil displacement agent provided by the invention has excellent hydrophilicity, acid and alkali resistance and salt resistance, can form a stable water-in-oil emulsion with crude oil in a wide pH value range or under high salinity, and can improve the stability and viscosity of the emulsion; the emulsifying effect is strong, the emulsifying swept volume can be enlarged, and the application prospect in medium-low permeability oil reservoirs is wide; the preparation method provided by the invention is simple, convenient and high in practicability.

The invention discloses a composite emulsifier and a preparation method and application thereof, belonging to the technical field of emulsifiers. The cationic starch-sodium cholate composite emulsifier is prepared by the following method: sodium cholate and cationic starch are mixed, distilled water is added, and the mixture is heated and stirred at 50-60 DEG C in an oil bath for 0.5-2h to obtain the cationic starch-sodium cholate composite emulsifier solution, and then the obtained cationic starch-sodium cholate composite emulsifier solution is sealed and stored at 4 DEG C for 3-5h, and then vacuum freeze-dried at -30 DEG C for 24-36h to obtain the cationic starch-sodium cholate composite emulsifier. The preparation process of the invention is simple, the raw material source is abundant, the cost is low, and the use of industrial production is easy; the composite emulsifier provided by the invention has stable properties and strong emulsification ability; the invention uses cationic starch and sodium cholate as raw materials, is safe and non-toxic, has no problems such as phytotoxicity and pollution, and is green and environmentally friendly.

The invention belongs to the field of oil and gas fields, and provides a tall oil-based surfactant and a preparation method and application thereof.The preparation method of the tall oil-based surfactant comprises the steps that S1, tall oil acid and diethanol amine serve as raw materials and are subjected to an amidation reaction under the action of a solid base catalyst, and tall oil diethanolamide is obtained; s2, carrying out esterification reaction on the tall oil diethanolamide and maleic anhydride which serve as raw materials under the action of a solid acid catalyst and a negative pressure condition to obtain tall oil diethanolamide succinic acid monoester; and S3, mixing the tall oil diethanolamide succinic acid monoester and a sodium sulfite solution, reacting, adding ethanol after the reaction is completed, stirring, and filtering to obtain a liquid which is the tall oil-based surfactant. The tall oil-based surfactant disclosed by the invention can be independently used as a surfactant for an oil-displacing agent, and the chromatographic separation effect caused by different adsorbability of each component after a traditional compound oil-displacing agent system enters a stratum is overcome.

The invention discloses a DTPA derivative-containing low-nucleation pollution detergent and a preparation method thereof.The DTPA derivative is prepared by the steps that diethylenetriamine pentaacetic acid and ethanolamine are put into an enamel reaction kettle with a distillation device, an 18-crown ether-6 catalyst is added, constant-temperature stirring reaction is conducted under vacuum protection, condensation reflux dehydration is conducted, and the DTPA derivative is obtained after the reaction is completed. The preparation method of the low-nucleation-pollution decontaminant comprises the following steps: mixing the DTPA derivative, the nonionic surfactant, the bio-based surfactant, the coordination adsorbent and water, and adjusting the pH value to 5-9 by using citric acid or diethylenetriamine to obtain the low-nucleation-pollution decontaminant containing the DTPA derivative. According to the invention, raw materials which do not contain halogen and harmful elements such as sulfur, sodium, silicon, lead, mercury, arsenic, antimony and copper are selected as synergistic components of the decontaminant, so that the problem that the harmful elements cause serious damage to equipment is avoided, and corrosion inhibitor components which are generally required to be added in a conventional nuclear pollution decontaminant are omitted by optimizing the raw materials.

This invention relates to the field of oilfield chemistry, and discloses a betaine compound, its preparation method, and its application. The betaine compound has the structure shown in Formula I: In Formula I, m = 1-30; n = 1-15; R1 is a C1-C8 carbon chain alcohol or a C6-C8 aromatic alcohol; R2 and R3 are each independently hydrogen or methyl; R4 is a C1-C3 alkylene or hydroxylated alkylene; M ‑ SO3 ‑ or COO ‑ The betaine compound contains a large number of PO groups, increasing the size of the hydrophobic groups. Betaine percolators containing this compound, through the synergistic effect of the PO groups and betaine molecules, transform the active components of crude oil into low-molecular-weight components (such as fatty acids), reducing the interfacial film strength of the betaine and thus improving the deformability of the emulsion. The betaine compound of this invention can be used as a betaine percolator for fracturing in low-permeability reservoirs, further improving oil recovery.

The present application relates to a kind of high-efficiency industrial water treatment cleaning agent and its preparation method, belong to water treatment reagent technical field.The present application is by synthesizing the cashew phenol grafting male pinoate sulfonic acid sodium compound containing isomeric decanol polyoxyethylene 7 ether segment, cashew phenol segment and sulfonic acid group simultaneously, and cashew phenol grafting male pinoate sulfonic acid sodium compound, nitrilo tris (methylene phosphonic acid) trisodium salt, 1-isopropoxy-2-propanol, 2-amino-1-butanol and ethanol are physically compounded, to obtain cleaning agent;Cashew phenol grafting male pinoate sulfonic acid sodium compound contains nonionic surfactant segment and anionic sulfonate group simultaneously, and both synergistic cooperation, jointly improve surface activity, oil removal capacity, and long alkane hydrophobic chain segment, olefin segment and benzene ring in cleaning agent can be adsorbed on metal surface by hydrophobic interaction and conjugation, and negatively charged sulfonic acid sodium can repel corrosive negative ion, reduce the corrosion to metal.