Abstract:
A method of obtaining diamond and/or diamond-like modifications of boron nitride from carbon and/or boron nitride as initial material with the use of explosion energy, that energy being produced by detonation of a charge containing an explosive substance and the initial material.
Abstract:
A method of controlling the inlet valves of a compression-type chemical reactor consists in continuously measuring, during the operation of the reactor (1), the pressure inside its working chambers (4, 5) and supply lines (7, 6) and in determining the sign of the pressure differential (//cP) between the said working chambers (4, 5) and the corresponding supply lines (7, 6). Upon change of sign of the pressure differential (//cP) from "minus" to "plus" a signal is formed for relieving the inlet valves (8, 9) from any controlling influence with the exception of the pressure differential, whereas upon change of sign of the pressure differential (//cP) from "plus" to "minus" a signal is sent for the start of counting a time interval (u), after the expiration of which a signal is formed for closing the inlet valves (8, 9) of the chemical reactor (1). A device for controlling the inlet valves of the compression-type chemical reactor comprises drives (10, 11) for the inlet valves (8, 9) of the chemical reactor (1), pressure sensors (14, 15, 16, 17) mounted inside the working chambers (4, 5) and supply lines (6, 7), comparators (18, 19) connected to the outputs of the sensors (14, 15, 16, 17), units (12, 13) for controlling the drives (10, 11), the inputs of those units being connected, through timers (20, 21), to the outputs of the comparators (18, 19) and their outputs to the drives (10, 11), and a chronometer (22) connected to one of the comparators (18, 19).
Abstract:
A method of producing graphene sheets and plates from graphitic material including (a) mixing graphitic material particles in a liquid medium to form a suspension; (b) compressing the suspension; (c) directing the compressed suspension through a local constriction into an area of reduced pressure to decompress the suspension in less than 2×10−6 second to a pressure less than 20% of the compression pressure, thereby exfoliating graphene sheets and plates from the graphitic material.
Abstract:
A suspension of nanodiamond aggregates according to the present invention is a suspension of detonation nanodiamond aggregates. The suspension has such a pH and an electric conductivity as to meet one of conditions (1) and (2) as follows. (1) The suspension has a pH of 4 to 7 and an electric conductivity of 50 µS/cm or less per weight percent of the solids concentration of the suspension; and (2) the suspension has a pH of 8 to 10.5 and has an electric conductivity of 300 µS/cm or less per weight percent of the solids concentration of the suspension.
Abstract:
Provided is a new material produced by a detonation method using a non-gunpowder-based starting material which is inexpensive and is capable of stable supply, using carbon particles which include nanoscale graphite carbon and diamond. These coated particles are constituted by carbon particles, which are produced by a step for disposing an explosive material having a detonation velocity of 6300 m/s or more around a starting material including an aromatic compound having two or fewer nitro groups, and a step for detonating the explosive material, being coated on the surface of base material particles.
Abstract:
Solid materials may be processed using shockwaves produced in a supersonic gaseous vortex. A high-velocity stream of gas may be introduced into a reactor. The reactor may have a chamber, a solid material inlet, a gas inlet, and an outlet. The high-velocity stream of gas may be introduced into the chamber of the reactor through the gas inlet. The high-velocity stream of gas may effectuate a supersonic gaseous vortex within the chamber. The reactor may be configured to facilitate chemical reactions and/or comminution of solid feed material using tensive forces of shockwaves created in the supersonic gaseous vortex within the chamber. Solid material may be fed into the chamber through the solid material inlet. The solid material may be processed within the chamber by nonabrasive mechanisms facilitated by the shockwaves within the chamber. The processed material that is communicated through the outlet of the reactor may be collected.
Abstract:
The present invention is a method for producing carbon particles by detonation and relates to a production method that is characterized by comprising: a step in which an explosive material that is a liquid at normal temperature and normal pressure is arranged around a raw material that contains an aromatic compound having three or more nitro groups; and a step in which the explosive material is detonated. The production method of the present invention makes it possible to produce a good yield of diamonds by detonation.
Abstract:
Disclosed is a reactor and agitator useful in a high pressure process for making 1-chloro-3,3,3-trifluoropropene (1233zd) from the reaction of 1,1,1,3,3-pentachloropropane (240fa) and HF, wherein the agitator includes one or more of the following design improvements: (a) double mechanical seals with an inert barrier fluid or a single seal; (b) ceramics on the rotating faces of the seal; (c) ceramics on the static faces of seal; (d) wetted o-rings constructed of spring-energized Teflon and PTFE wedge or dynamic o-ring designs; and (e) wetted metal surfaces of the agitator constructed of a corrosion resistant alloy.
Abstract:
Apparatus and methods are provided for converting methane in a feed stream to acetylene. A hydrocarbon stream is introduced into a supersonic reactor and pyrolyzed to convert at least a portion of the methane to acetylene. The reactor effluent stream may be treated to convert acetylene to another hydrocarbon process.
Abstract:
Method and system for controlled nanodiamond synthesis based on treating of a specially prepared solid carbon source target including carbon containing material in liquid media by irradiation energy beam focused at a predetermined distance from the target surface and having parameters to produce a light-hydraulic effect impacting the target surface and leading to the forming of diamond nanocrystals.