33 results about "Crystal deposition" patented technology

The invention relates to a method to make high purity cerium oxide that includes the following steps: taking ultrasonic leaching and extraction to gain rare earth sulfate enriched liquid; taking solid-liquid separation; taking neutralization deposition, taking solid-liquid separation, taking electrochemistry oxide to gain quadravalence cerous sulfate material liquid, taking ultrasonic fractional extraction, taking electrochemistry reducing to gain trivalence cerous sulfate, taking ultrasonic crystallization deposition to gain cerous sulfate crystal deposition, taking solid-liquid separation, drying and burning to gain the superfine high purity cerium oxide product of content over 99.99%, and the particle diameter is 0.01-10.0um. The advantages of the invention are that it improves leaching and extracting speed, improves yield, and purity, lowers cost and is environment protection.

The invention discloses a pipe bunch system of a hydrogenation reaction effluence air cooler applied in chlorine raw oil processing, which comprises four channel boxes and six tube grid pipe bundles. The channel boxes comprise outer side pipes and inner side pipes. The outlet of a first channel box is communicated with the inlet of a second channel box by a first tube grid pipe bunch and a second tube grid pipe bunch. The outlet of the second channel box is communicated with the inlet of a third channel box by a third tube grid pipe bunch and a fourth tube grid pipe bundle. The outlet of the third channel box is communicated with the inlet of a fourth channel box by a fifth tube grid pipe bundle and a sixth tube grid pipe bundle. Two rows of pipe bundles in a first tube pass adopt clad pipes, which avoids under-deposit corrosion of NH<4>Cl crystal deposition or local erosion caused by under-deposit corrosion in cooling process. As liquid water quantity is added, a second tube pass and a third tube pass adopt carbon steel pipe bundles, which can reduce the manufacturing cost of the REAC system. The inlet water of the reaction effluence flows into the first channel box horizontally and the outlet water of the reaction effluence flows out of the fourth channel box horizontally, thus avoiding uneven distribution of oil, air and water in the upper row of pipe bundle and the lower row of pipe bundle. The invention can increase safe operation cycle and the economic benefit of the hydrogenation REAC system.

A method of crystallization which comprises feeding to a crystallization vessel either a solution of terephthalic acid or a slurry solution in which part of terephthalic acid has been precipitated, crystallizing the terephthalic acid in the vessel to obtain a slurry comprising crystals and the solvent, and discharging the slurry, wherein the slurry discharged from the crystallization vessel is introduced into a liquid cyclone through a tangential-direction inlet, and the slurry component constituting a descending turning flow and flowing out through the lower outlet of the cyclone is returned to the crystallization vessel, while the slurry component overflowing through the upper outlet of the cyclone is discharged. Thus, crystals having a large particle diameter can be obtained. Furthermore, no crystal deposition or accumulation within the crystallization vessel occurs, and the crystallization operation can be stably conducted for long.

Disclosed is a novel compound useful as a charge transporting agent which has a high carrier mobility and with which a photosensitive layer can be stably formed without causing crystal deposition or pinhole formation during the formation of the photosensitive layer and also an organic photoreceptor for electrophotography having a high sensitivity and a low residual potential can be produced. The compound is represented by general formula (1). In general formula (1), R1 to R7 each represent, for example, an alkyl group, X1 represents, for example, -CH=CH-CH=CH2, X2 represents, for example, -CH=CH2, and k and l each represent an integer of 0 to 4.

The invention relates to a method to make high purity cerium oxide that includes the following steps: taking ultrasonic leaching and extraction to gain rare earth sulfate enriched liquid; taking solid-liquid separation; taking neutralization deposition, taking solid-liquid separation, taking electrochemistry oxide to gain quadravalence cerous sulfate material liquid, taking ultrasonic fractional extraction, taking electrochemistry reducing to gain trivalence cerous sulfate, taking ultrasonic crystallization deposition to gain cerous sulfate crystal deposition, taking solid-liquid separation, drying and burning to gain the superfine high purity cerium oxide product of content over 99.99%, and the particle diameter is 0.01-10.0um. The advantages of the invention are that it improves leaching and extracting speed, improves yield, and purity, lowers cost and is environment protection.

The invention discloses a method of forming the metal-insulation-metal capacitance on the base layer including dielectric layer, bronze bottom plate, bronze wire and blocking layer, the metal -insulation-metal capacitance is embedded in the bronze joint. This method includes the following processes: in the dielectric material on the blocking layer forms the through open hole with damascene structure and the placket on the flat plate of the metal-insulation-metal capacitance; deposit a dielectric layer on the relating placket, this dielectric layer is the middle insulation of the metal-insulation-metal capacitance; form a resist layer on the placket of the flat of the metal-insulation-metal capacitance; implement a photo etch procedure to eliminate the dielectric layer to unveil the bronze wiring, and the side wall of the through hole placket still has the dielectric layer to be as the metal block; then carry out the general bronze mutual connection technique (including metal block deposition, bronze crystal deposition, bronze electroplate, and chemical technological rubbing), so as to complete the metal-insulation-metal capacitance.

A flow corrosion-salt deposition device for supercritical water oxidation reaction coupling, including a supercritical water oxidation coupling section, a flow corrosion-salt deposition test section and a connecting pipeline section, the supercritical water oxidation coupling section includes a main pipe section, an organic compound mixture The inside of the main pipe section is a material channel composed of a tapered cavity, a throat cavity and a gradually expanding cavity connected in sequence from front to back. The rear end of the expanding cavity is provided with a thermocouple and a pressure tap. The organic compound mixer and the oxidant mixer are arranged outside the main pipe section; the flow corrosion-salt deposition test section includes a test pipe section, an electric heater is installed in the outer front section of the test pipe section, a cooling water jacket is installed in the outer rear section, and a thermocouple and a pressure tap are installed in the middle; The connecting pipe section includes a connecting pipe, which directly communicates with the rear end of the test pipe section and is provided with a thermocouple and a pressure tapping port. The invention can solve the problems of corrosion and salt deposition in supercritical water oxidation, and explore the microscopic characteristics of material corrosion and the crystallization deposition characteristics of inorganic salts.

This invention discloses a method for sterilizing and removing residual calcium from electrolytic tank. The method applies an instant reverse pulse wave multi-times the practicle working voltage to the electrolytic tank during the electrolysis process. The pulse wave voltage has potential difference enough to kill bacteria and viruses, and can vibrationally remove CaCO3 and other types of calciumdeposited onto the cathode plate, thus can avoid crystal deposition.

The invention discloses a method of forming the metal-insulation-metal capacitance on the base layer including dielectric layer, bronze bottom plate, bronze wire and blocking layer, the metal -insulation-metal capacitance is embedded in the bronze joint. This method includes the following processes: in the dielectric material on the blocking layer forms the through open hole with damascene structure and the placket on the flat plate of the metal-insulation-metal capacitance; deposit a dielectric layer on the relating placket, this dielectric layer is the middle insulation of the metal-insulation-metal capacitance; form a resist layer on the placket of the flat of the metal-insulation-metal capacitance; implement a photo etch procedure to eliminate the dielectric layer to unveil the bronze wiring, and the side wall of the through hole placket still has the dielectric layer to be as the metal block; then carry out the general bronze mutual connection technique (including metal block deposition, bronze crystal deposition, bronze electroplate, and chemical technological rubbing), so as to complete the metal-insulation-metal capacitance.

Oils and fats having a high 2-position palmitic acid content, which are used as a raw material for an oil / fat composition containing an XPX triglyceride having palmitic acid linked to position 2 thereof and X linked to positions 1 and 3 thereof, crystalize at low reaction temperature, likely leading to troubles such as clogging of a reaction vessel (X: an unsaturated fatty acid or a saturated fatty acid having not more than 10 carbon atoms). However, according to the present invention, when such oils and fats are mixed with a particular raw material fatty acid or a lower alcohol ester thereof,the cloud point of the raw material mixture can be set to 39.5 DEG C or lower, and therefore, crystal deposition does not occur even at a low reaction temperature.

A polymerizable liquid-crystal compound of formula (I) effective for preventing crystal deposition after coating with polymerizable liquid crystal (II) or a polymerizable liquid crystal similar thereto. P represents a polymerizable functional group; Sp represents a spacer or a single bond; Z1 and Z2 each represent —CO—O—; R0 represents a linear alkyl group having 1-15 carbon atoms; R2, R3 and R4 each independently represent an alkyl group having 1-4 carbon atoms, an alkoxy group having 1-4 carbon atoms, an alkoxycarbonyl group having 2-5 carbon atoms, an acyloxy group having 2-5 carbon atoms, an acyl group having 2-4 carbon atoms, an amide group having 2-5 carbon atoms, a cyano group, an amino group, a hydroxyl group, or a halogen atom; r1, r2 and r3 indicate an integer from 0-4; when r1, r2 and r3 each are 2 or more, then R2, R3 and R4 each may be the same or different; however, when R0 is a methyl group, then r2 is not 1.

The invention discloses an apparatus and a method for continuously separating o-isopropylphenol and p-isopropylphenol. The apparatus comprises: a tower 1 and a tower 2, wherein the tower 1 and the tower 2 are connected in series, rotation scrapers are respectively arranged on tower body axis centers inside the tower 1 and the tower 2, the lower portion inside the tower 1 is provided with a grid, the outer sides of the tower 1 and the tower 2 are provided with constant temperature material inlets, a liquid purification section, a crystal purification section, a melting purification section and a crystal deposition section are sequentially arranged inside the tower 1 from top to bottom, a residue liquid recovery section, a crystal re-purification section and a crystal re-deposition section are sequentially arranged inside the tower 2 from top to bottom, and an outlet on the bottom of the tower 1 is connected with the constant temperature material inlet on the middle part of the tower 2. The method comprises that: a material requiring separation is subjected to continuous re-crystallization in the tower 1 and the tower 2 to separate o-isopropylphenol and p-isopropylphenol. With the apparatus and the method, continuous material feeding and material discharging can be achieved, and high purity o-isopropylphenol and p-isopropylphenol products can be produced.

The invention relates to a method to make neodymium oxide that includes the following steps: mixing raw material, taking ultrasonic fractional extraction to gain enriched liquid containing Nd(NO3)3, taking ultrasonic to gain refined liquid of Nd(NO3)3, taking adsorption and trash extraction, taking solid-liquid separation, taking ultrasonic crystal deposition to gain Nd2(CO3)3 crystal deposit, taking solid-liquid separation, drying and burning to gain the superfine high purity neodymium oxide product that has content over 99.99%, and the particle diameter is 0.01-10.0um. The advantages of the invention are that it improves leaching and extracting speed, and the particle diameter is small, and particle size distribution equal.

A method using crystal deposition coating for modifying surface of fly ash for manufacturing a paper filler. The method comprises: after vibration screening to select fly ash with particle diameter of 30-55 μm, evenly mixing the fly ash with a Ca(OH)2 solution under room temperature; bubbling CO2 gas from the bottom of a reaction vessel under a stirring condition to realize modification via crystal deposition coating.