7 results about "Enhanced dissolution" patented technology

The invention provides a method for selectively leaching titanium from red mud, and belongs to the field of red mud resourceful treatment. The method comprises the following steps: slurrying red mud to obtain red mud slurry; mixing the red mud with a deconstruction agent, and performing microwave activation to obtain active red mud; the method comprises the following steps: mixing active red mud with an acidic inhibitor, and carrying out wet impurity removal pretreatment to obtain a titanium-rich filter cake; and mixing the titanium-rich filter cake with a targeted leaching synergist for selective enhanced dissolution to obtain a titanium-rich solution. Firstly, a deconstruction agent is used for carrying out microwave activation on red mud, and the subsequent leaching reaction activity of the red mud is improved; then an acidic inhibitor is used for conducting wet impurity removal pretreatment on the active red mud, effective components in the acidic inhibitor can preferentially dissolve iron and aluminum elements in the red mud, meanwhile, dissolution of the titanium element is inhibited, and titanium is enriched in slag to obtain a titanium-rich filter cake; and finally, carrying out selective enhanced dissolution on the titanium-rich filter cake by using a targeted leaching synergist to realize selective efficient leaching of the titanium element.

Provided is an industrial and efficient method for producing hydroxypropyl methylcellulose acetate succinate that exhibits an enhanced dissolution rate into a solvent. This method includes a liquid removal step, a first drying step, and a second drying step, wherein the first drying step involves drying hydroxypropyl methylcellulose acetate succinate under reduced pressure until it reaches a water content above 0% by mass and lower than or equal to 30% by mass while maintaining the product temperature above 0° C. and lower than or equal to 25° C.

This invention provides a photosensitive resin composition, a photoresist curable film, and their applications. The photosensitive resin composition comprises an alkali-soluble resin, a photosensitive compound, and a crosslinking agent. The crosslinking agent has a structure as shown in the following formula. Through the design of a specific crosslinking agent structure and its compounding with other components, the photosensitive resin composition, during exposure, achieves enhanced dissolution inhibition in non-exposed areas due to the shielding of some hydroxyl and carboxyl groups by tert-butyloxycarbonyl groups. In exposed areas, the photoacid-generating agent decomposes and catalyzes the departure of tert-butyloxycarbonyl groups, exposing active groups and achieving alkali solubility. After photolithography and development, the film exhibits higher film retention and better contrast.

The present disclosure relates to oral naproxen sodium tablets containing roller compacted particles, methods of making the same, and methods of using the same. Naproxen sodium tablets are formulated and prepared by dry granulation, in particular roller compaction. The naproxen sodium tablet is produced by combining a dry granulation compatible excipient with a roller compaction method, and compared with commercially available oral naproxen sodium tablets prepared by a standard wet granulation method, the naproxen sodium tablet has the advantages that the dissolution rate general situation is enhanced, and the disintegration time is shortened.

The invention relates to the technical field of reactors, in particular to a system and a method for ultrasonic-enhanced dissolution of a supergravity polymer, which are used for solving the problems of long swelling time, incomplete dissolution and easiness in blockage of an existing polymer dissolution device. A plurality of layers of ultrasonic transducers are arranged on the surface of a shell of the polymerization dissolution packed bed in a staggered and crossed mode, namely in a W shape, and a packing shearing space combining autorotation and revolution is built in the shell. The device introduces high-strength ultrasonic cavitation and microjet effects while generating strong shearing and updating a liquid film by using the rotary packing ring, so that not only is a dead angle of a sound field eliminated, but also the device adapts to the change of load impedance in the dissolving process. Through deep coupling of macroscopic rotational flow and a microcosmic cavitation effect, rapid gel breaking and uniform dissolution of a high-viscosity polymer can be realized at a relatively low temperature rise, and the device is suitable for continuous and efficient preparation of oil field chemicals and sewage treatment agents.

The invention discloses a method for treating arsenic in waste acid through electrochemically-enhanced iron ion dissolution. The method comprises the steps of electrochemically-enhanced dissolution, generation of scorodite through a precipitation reaction and separation of precipitates. According to the method disclosed by the invention, the problems of low dissolution rate of iron ions, long reaction period and high operation cost in the traditional arsenic removal of contaminated acid are solved through a synergistic process of electrochemical enhanced iron ion release and scorodite directional crystallization; according to the electrochemical dissolution, iron oxide or iron-containing waste residues are adopted as an anode material, and the synergistic effect of a catalytic cathode and a direct-current electric field is combined, so that dissolution of iron ions is remarkably accelerated, efficient oxidation fixation of arsenic is synchronously promoted, and the reaction time is greatly shortened; the generated scorodite crystal structure is stable, and the fixation of arsenic can be realized.

The invention relates to the technical field of bamboo wood treatment, in particular to a mould-proof process for treating bamboo wood through cooperation of low-temperature freezing and ultrasonic waves. The mould-proof technology comprises the following steps that bamboo wood is sequentially subjected to water immersion treatment and freeze-thaw cycle treatment, and freeze-thawed bamboo wood is obtained; and the freeze-thawed bamboo wood is subjected to ultrasonic treatment under the water bath condition, and the modified bamboo wood is obtained. According to the mildew-proof process, the water-saturated bamboos are sequentially subjected to freeze-thaw cycle treatment and ultrasonic treatment, and the freeze-thaw cycle treatment can enable water permeating pores in the bamboos to be condensed into ice crystals to cause volume expansion, so that a transverse substance transmission channel is effectively established, the permeability is improved, and meanwhile, the macroscopic mechanical integrity of the bamboos is kept. The enhanced dissolution effect of the ultrasonic cavitation effect promotes dissolution of a microbial metabolism substrate and maintains the basic integrity of a cellulose microfibril network at the same time, so that a nutrient matrix required by microbial metabolism is fundamentally eliminated, and long-acting mildew prevention is realized.