A method for making a calcium hydroxide solution for use in a carbonation reactor containing supercritical carbon dioxide to form calcium carbonate particles of a selected size.

The present disclosure provides Lazarev reactor that sustains reaction of two dimensional polymerization on the interface of two immiscible solutions A and B carrying components of reaction to the interface where reaction takes place and produces film of two dimensional polymer layers that are pulled out of reactor and rolled up on roll after drying excess of solvent out.

Process for precipitating a carbonate or (oxy)hydroxide comprising nickel from an aqueous solution of a nickel salt wherein such process is carried out in a vessel comprising (A) a vessel body, (B) one or more elements that control the hydraulic flow of the slurry formed during the precipitation and that induce a loop-type circulation flow, and (C) a stirrer whose stirrer element is in the vessel but located separately from the element(s) (B).

A method for monitoring polymerization processes can include reacting by polymerization a feedstock in the presence of a catalyst in a reactor to produce an effluent comprising a polymer and a solvent; measuring a density of the effluent; and calculating a monomer conversion rate and/or a polymerization rate for the polymerization based on the density of the effluent. A system for monitoring polymerization processes can include a reactor containing an effluent comprising a solvent, a polymer, and a monomer; a flash vessel fluidly coupled to the reactor to receive the effluent from the reactor; and an inline density meter fluidly coupled to the reactor, placed between the reactor and the flash vessel, and configured to measure a density of the effluent.

An ammonia-based multi-zone double-loop process for ultra-low emission of multi-pollutant. From an absorption tower inlet, the flue gas successively passes through cooling concentration crystallization, sulfur oxide absorption, water washing and purifying and dust and mist removing zones, which are separated by gas permeable liquid collecting plates, forming clean flue gas and discharged from an outlet. The cooling concentration crystallization zone, the sulfur oxide absorption zone, and the water washing and purifying zone are respectively provided with a plurality of sprayers, and respectively use a concentration liquid, an absorption liquid, and a water washing liquid as spraying liquids. The absorption, concentration and water washing liquids, after converging respectively, into absorption, concentration crystallization and water washing circulation tanks, the absorption, concentration and water washing liquids, respectively, are sprayed in a circulating manner through absorption, concentration and water washing pumps.

Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.

Processes and systems for the recovery of solvents from a feedstock are provided, as well as processes and systems for the recovery of target botanical compounds. The processes and systems include a heated mixing device, in which a feedstock can be simultaneously mixed and heated to vaporize and release a solvent or botanical compound from the feedstock. The vaporized solvent or botanical compound can be condensed and collected as recovered solvent or a recovered botanical compound.

A method for monitoring polymerization processes can include reacting by polymerization a feedstock in the presence of a catalyst in a reactor to produce an effluent comprising a polymer and a solvent; measuring a density of the effluent; and calculating a monomer conversion rate and/or a polymerization rate for the polymerization based on the density of the effluent. A system for monitoring polymerization processes can include a reactor containing an effluent comprising a solvent, a polymer, and a monomer; a flash vessel fluidly coupled to the reactor to receive the effluent from the reactor; and an inline density meter fluidly coupled to the reactor, placed between the reactor and the flash vessel, and configured to measure a density of the effluent.

A process and apparatus for the continuous conversion of isotropic carbonaceous materials into anisotropic mesophase pitch is disclosed. The invention disclosed herein addresses the need for lower production costs compared with traditional batch mesophase conversion of isotropic pitch. A unique thermal processing and in-process separation of reacted mesophase from the continuous matrix of fresh or partially reacted isotropic pitch is provided. Potential uses are for further continuous processing into carbon fibers or carbon form densification.

A composite material preparation system comprises a sealed reaction kettle for containing reactants and base materials; temperature and pressure detecting units for detecting the temperature and pressure inside the reaction kettle; and a heating unit for hydrothermally induced heating, based on the detected temperature and pressure values. The heating unit comprises an induction coil, an induction heating device, and a control mechanism for controlling the generation of an induction frequency of the induction heating device. The reaction kettle is located in the induction coil, both ends of the induction coil are mounted on an outer wall of the induction heating device, and the induction coil and the induction heating device have circulating water introduced inside. The device can prepare a composite material having good interface bonding, by utilizing induced heating under the premise of controllable temperature and pressure, and by utilizing the characteristic that the reactants themselves are heated.