5results about How to "Fast removal" patented technology

Provided is a ceria particle for chemical mechanical polishing, and a slurry composition for chemical mechanical polishing containing the same. The surface of the ceria particle contains Ce 3+ and Ce 4+ When the ceria particle of the embodiment of the present application is used, by increasing the proportion of Ce 3+ on the surface of ceria, a high oxide film removal rate and an oxide film polishing selectivity ratio can be exhibited in a low content range, despite a small particle size.

The application provides a method for removing hydrogen chloride from a chloride intermediate, and belongs to the technical field of chemical production processes. The chloride intermediate is introduced into a mixer from a material inlet of the mixer, and enters a refining kettle through a two-way channel of the mixer; after the introduction of the chloride intermediate is stopped, refining gas is continuously introduced into the mixer from the material inlet of the mixer for purging, and the chloride is obtained. The method provided by the application can make the material in the refining kettle produce internal circulation by limiting the structure of the mixer, so as to play a role of sufficient stirring and accelerate the removal speed of hydrogen chloride in the chloride intermediate. The results of the examples show that, after the method provided by the application is used for purging for 30 min, the actually measured hydrogen chloride content can reach below 0.05 mg / L, the removal time is greatly reduced, and the annual energy consumption reduction rate can reach 87.5%.

This invention discloses a coaxial laser and jet electrolysis composite machining system, belonging to the field of special machining technology, which can solve the problem of the high difficulty of laser and electrolysis composite machining of precision micro-holes in the prior art. The system includes: a laser unit, an output optical fiber, a machining head, a liquid supply unit, and a first power supply; the laser unit provides a laser beam to the output optical fiber; the machining head is provided with a laser channel, and the output optical fiber is disposed within the laser channel for transmitting the laser beam to the area to be machined on the workpiece; a conductive structure is coaxially disposed on the outer side of the output optical fiber; a liquid channel is provided on the machining head, and the liquid channel is connected to the nozzle of the machining head; the liquid supply unit provides electrolyte to the liquid channel, so that the electrolyte is coaxially jetted from the gap between the nozzle sidewall and the conductive structure into the area to be machined on the workpiece; the anode of the first power supply is connected to the workpiece, and the cathode of the first power supply is connected to the conductive structure. This invention is used for laser and electrolysis composite machining.

The application relates to the technical field of wastewater treatment, and discloses a method for rapidly degrading phenol by using iron in phenol-containing wastewater, wherein safe and nontoxic cysteine is selected as a reaction initiator, and meanwhile, reduction and complexation are realized, so that the reaction is rapidly started, and the pH range of a traditional Fenton reaction is widened; Cu 2+ is selected as a reaction intensifier, Fe 3+ / Fe 2+ circulation is accelerated, phenol is rapidly degraded, and the degradation of other organic pollutants is synergistically improved; without preparing and adding complex and high-cost iron-containing activators, a small amount of iron contained in the wastewater is used as a Fe 2+ source, and recycling is formed in the system, so that the pollutant removal speed is greatly improved, and the generation of iron sludge is reduced. The technology has the advantages of being green, efficient, simple to operate and low in cost.

The present application belongs to the technical field of groundwater pollution remediation, and particularly relates to a biological remediation composition for remediation of contaminated groundwater, a remediation agent, and a preparation method and application thereof. The biological remediation composition for remediation of contaminated groundwater comprises a composite bacterial flora, a slow-release carrier material, a nutrient slow-release agent, a surfactant, and a stabilizer; the composite bacterial flora is composed of the following bacterial strains: Bacillus subtilis, Pseudomonas putida, Desulfovibrio and Serratia marcescens. The biological remediation composition provided by the present application has high remediation efficiency and improves the removal rate of diesel oil, chlorophenol, and sulfadimethoxine.