46results about How to "Increase the use concentration" patented technology

The invention discloses a continuous flow synthetic method for preparing 2-methylsulfonyl-5-trifluoromethyl-1,3,4-thiadiazole by oxidizing 2-methylthio-5-trifluoromethyl-1,3,4-thiadiazole. Compared with the prior art, the reaction time is shortened from the conventional 9-11 hours to few minutes, and the reaction efficiency is significantly improved; and the reaction adopts continuous flow, so that the accumulation of a large amount of peroxides at a high reaction temperature is avoided, and the inherent safety of the process is improved.

The invention relates to an oil agent and a preparation method thereof. The oil agent at least includes fluorine-containing polyether, and the quality of the fluorine-containing polyether is greater than or equal to 45% of the quality of the oil agent; the fluorine-containing polyether is ethylene oxide, [(1 , 1,2,2-tetrafluoroethoxy) methyl] random copolymer of oxirane and propylene oxide, its structural formula is: preparation method of the present invention: starter and strong base are blended, Then heat up to 105~125°C, then add ethylene oxide, [(1,1,2,2-tetrafluoroethoxy)methyl]oxirane and propylene oxide which are mixed uniformly, under protective atmosphere Polymerization reaction to obtain fluorine-containing polyether; then, mix fluorine-containing polyether, phosphate potassium salt and sodium alkylsulfonate uniformly at room temperature, and then add the mixture to mineral oil to obtain oil agent. The invention increases the hydrogen bond in the system, the increase of the hydrogen bond is beneficial to the improvement of the cloud point, and the quality of the oil agent can be maintained while increasing the concentration of the oil agent.

The invention provides an effervescent gas suspension proppant for slickwater fracturing. The effervescent gas suspension proppant comprises aggregate particles, wherein an inner coating and an outercoating are arranged on the outer layer of each aggregate particle, and the inner coating is located between the outer layer of each aggregate particle and the outer coating. An outer effervescent membrane can be subjected to a reaction rapidly in slickwater, self-generating bubbles are generated, and the generated self-generating bubbles can be effectively adsorbed on the surface of an inner membrane of the proppant, namely, the surface of the hydrophobic and aerophilic membrane, so that buoyancy of the proppant in the slickwater is improved, the proppant suspend in slickwater freely, and thepurpose of carrying sand by common cross-linking liquid is achieved.

In the method, sulfonated polymer is dissolved in organic solvent. Added organic modified montorillonite clay is dispersed on basal body of polymer evenly. Membrane is formed through slobbering method. Through drying and stripping membrane in water produces membrane needed. Solving difficult problem of methanol infiltration of proton exchange membrane in use for direct fuel cell of methanol, the invention possesses features of simpler technique, and low cost of material etc.

The invention relates to a heavy oil hydrogenating and modifying method, which is characterized in that a heavy oil raw material, heavy cycle oil and a catalyst are uniformly mixed in a premixing device, and are introduced with hydrogen in a liquid phase fluid bed reactor, a hydrotreatment reaction is carried out under the heavy oil hydrotreatment condition, the hydrogenation products is fractionated to light distillate oil and heavy distillate oil in a distillation column, the light distillate oil leads out the apparatus, the heavy distillate oil is circulated to the premixing device and is mixed with the heavy oil raw material; by taking total weight of the catalyst as a reference, the catalyst comprises 2-18wt% of metallic element and 82-98wt% of non metallic element, wherein, by taking the weight of the metallic element as a reference, more than 95wt% of metallic element is V, Ni and VI B family metallic element; by taking the weight of the non metallic element as the reference, more than 95% of non metallic element is C and S, and at least a part of S and the metallic element are existed with a sulfide form of the metallic element. The heavy oil hydrogenating and modifying method is suitable for hydrogenation and conversion of the heavy oil, and is especially suitable for hydrotreatment of inferior heavy oil with high metal, high charcoal residue and high condensed ring substance.

The invention relates to polyquaternary salt which is composed of a cation part and an anion part. The cation part is in the linear structure comprising the following repetitive units, wherein each of R1 and R2 is independently selected from one of hydroxyl substitutes of straight-chain alkylene and branch-chain alkylene of C1-C8 and straight-chain alkylene or branch-chain alkylene of C1-C8, and each of m, n, p, q is any integer of 1-8. The polyquaternary salt has efficient and broad-spectrum algae removing capacity, and dosage is low.

The present invention relates to bright warm-keeping lightness type fibers and a preparation method thereof, wherein mainly a polyester is subjected to special-shaped spinning hole melt spinning, oil agent feeding and winding so as to prepare the bright warm-keeping lightness type fibers, wherein the oil agent at least comprises a fluorine-containing polyether, the mass of the fluorine-containing polyether is more than or equal to 45% of the mass of the oil agent, the fluorine-containing polyether is a random copolymer of ethylene oxide, [(1,1,2,2-tetrafluoroethoxy)methyl]ethylene oxide and propylene oxide, and the structure formula is defined in the specification. The preparation method comprises: metering a polyester, extruding, cooling, oiling, stretching, carrying out thermal shaping, and winding so as to prepare the bright warm-keeping lightness type fibers. According to the bright warm-keeping lightness type fibers of the present invention, the fiber cross section shape is changed by the spinning while the fibers have the hollowness, the air permeability and the thermal insulation property are increased, and with the special cross section shape of the fibers, the bright surface light refraction effect is provided so as to make the fabric bright and gorgeous; and the fibers further have characteristics of lightness, light weight, and soft touch feeling.

The invention provides microcapsule guar gum which comprises guar gum and C5 petroleum resin coating the guar gum. The invention further provides a preparation method of the microcapsule guar gum. According to the embodiment of the application, the guar gum is coated with the C5 petroleum resin, so that the microencapsulation of the guar gum is achieved, a use concentration of the guar gum is increased under the condition that the guarant viscosity is not increased, the microcapsule guar gum with a very high concentration can be pumped over, the gum strength of the guar gum can be improved greatly, and cracks and solution caves of strata can be blocked off well.