60results about How to "Wide operating conditions" patented technology

The invention provides a method for recycling impurity salts generated in industrial wastewater treatment. The method comprises the following steps: (1) calcining impurity salts generated in an industrial wastewater treatment process, cooling, dissolving in pure water, and obtaining a high-concentration sodium chloride solution; (2) performing solid-liquid separation, and removing residual organisms in the solution; (3) successively removing sulfate radicals and calcium ions, adjusting the pH of the solution to neutral, and obtaining a high-purity sodium chloride solution; and (4) crystallizing the high-purity sodium chloride solution obtained in step (3), obtaining a sodium chloride crystal product, and washing to obtain the high-purity sodium chloride crystal product. By adopting the method, the effective treatment and recycling of impurity salts generated in the industrial wastewater zero emission process of electric power, petroleum chemistry, coal chemistry and the like; moreover, the method is simple in treatment process and moderate in operation conditions, and is a high-efficiency and stable impurity salt recycling method; and a final product sodium chloride is high in recycling rate and purity.

A chopper for receiving the straw and/or chaff from a combine harvester includes a housing with a chopping rotor to transport the materials though a discharge opening onto a tailboard construction with downwardly facing guide surface and fins for spreading of the crop materials. A rotary spreader has a plurality of fan members with blades rotatable for discharge to a respective side of the rotary spreader. An arrangement is operable so that in a first mode the crop material is spread wholly by the tailboard and in a second mode the crop material is spread at least mainly by the rotary spreader. In the second mode the tailboard remains position above the rotary spreader which is therefore located underneath a guide surface with fins of the guide surface facing downwardly adjacent the blades. The movement to the second ode is provided by the rotary spreader being moved forwardly and downwardly.

The invention discloses a method for preparing a 4A zeolite molecular sieve desiccant with high crystallinity through a raw material of common natural kaolin. The method comprises the following steps: taking kaolin as the raw material, roasting the kaolin by a direct roasting method or a dry-process alkali roasting method, colloidizing, crystallizing, and suction filtrating and cleaning the kaolin through deionized water, and then drying the kaolin; and adding clay mineral bentonite or kaolin crude ore into the kaolin for granulation, and then obtaining the 4A zeolite molecular sieve desiccant after roasting. The method has the advantages that the method has a simple preparation process, raw material available, and loose operating conditions; and the synthesized 4A zeolite molecular sieve has the characteristics of high crystallinity, small particle size, good dispersibility, and high static water adsorption rate and high strength against crushing. The static water adsorption rate of the desiccant reaches 21.5 weight percent, and the strength against crushing reaches 62.1N/particle. The indexes reach the standards of the Department of Chemical Industry.

An improved method for making a photoresist stripping solution for a metal-containing semi-conductor substrate where the stripping solution comprises a blend of at least one organic sulfonic acid with a halogen-free hydrocarbon solvent wherein concentrations of trace amounts of residual sulfuric acid and sulfur trioxide in the blend are reduced to very low levels.

The invention discloses a method for preparing a chromium-based composite plating layer in an environment-friendly trivalent chromium plating bath. The method adds different particles in a basic electrolyte containing chromium chloride to prepare the chromium-based composite plating layer which has even surface and is firmly combined with a substrate by selecting appropriate process conditions. The method has the advantage that the thickness of the prepared chromium-based composite plating layer is more than 50mu m. The composite plating layer has the hardness higher than that of a hexavalent chrome electroplating layer and the tribological property equivalent to that of the hexavalent chrome electroplating layer, and can substitute the prior hexavalent chrome electroplating technology under various friction working conditions.

The invention discloses a method for preparing a ZnO/attapulgite composite antibacterial agent, comprising the following steps: dissolving water-soluble inorganic zinc salt in distilled water, adding attapulgite powder in the solution, stirring and dispersing for 15min by ultrasonic wave at the same time, and continuing stirring to obtain turbid liquid consisting of the attapulgite and the water-soluble inorganic zinc salt; and adding NaOH solution in the turbid liquid, stirring till fully mixing to obtain turbid liquid of zinc hydroxide and the attapulgite, filtering the turbid liquid, taking filter residue and drying, calcining, and naturally cooling to the room temperature to obtain the ZnO/attapulgite composite antibacterial agent. The invention has the advantages of simple preparation process, convenient operation and low cost, takes the attapulgite with larger specific surface area as a carrier to absorb a certain amount of ZnO, thus being capable of effectively improving the antibiosis property of ZnO; and the prepared material can be widely used in fields such as antibiotic plastics, antibiotic ceramics, cosmetics packaging materials and the like.

The invention improves a preparation method of 3, 5-dihydroxy heptyl-6-gadoleic acid derivative. Asymmetric reduction is performed on intermediate 3-hydroxy-5-oxo-6-heptenoic acid ester derivative, alkali hydrolysis is performed on the obtained 3, 5-dihydroxy heptyl-6-heptenoic acid ester derivative crude product which is treated by alkali hydrolysis to obtain 3, 5-dihydroxy heptyl-6-gadoleic acid sodium salt derivative which is extracted and purified to obtain 3, 5-dihydroxy heptyl-6-gadoleic acid sodium salt derivative solution, then 3, 5-dihydroxy heptyl-6-gadoleic acid sodium salt derivative is converted into 3, 5-dihydroxy heptyl-6-gadoleic acid derivative, and 3, 5-dihydroxy heptyl-6-gadoleic acid sodium salt derivative is again converted into 3, 5-dihydroxy heptyl-6-gadoleic acid ester derivative with high yield, and purification methods such as recrystallization are performed to obtain purified 3, 5-dihydroxy heptyl-6-gadoleic acid ester derivative. The purified 3, 5-dihydroxy heptyl-6-gadoleic acid ester derivative is then hydrolyzed into 3, 5-dihydroxy heptyl-6-gadoleic acid sodium salt derivative which is finally converted into 3, 5-dihydroxy heptyl-6-gadoleic acid calcium salt derivative. 3, 5-dihydroxy heptyl-6-gadoleic acid derivative with high quality is obtained.

The invention relates to a method for preparing hydroxyethyl cellulose with high degree of substitution. The method prepares the hydroxyethyl cellulose by crushing, alkalifying, etherifying, neutralizing, separating, cleaning and drying a raw material cellulose. The method can produce the hydroxyethyl cellulose with high degree of substitution of between 2.2 and 3.5, and is applicable to production by universally adopted conventional vertical stirring reaction kettle without reforming the conventional equipment when put into production.

A tri-anionic-nonionic surfactant has the following structure formula, wherein H<2x+1>C<x> and H<2n+1>C<n> are alkyl group chains, x is an integer of 8 to 24 and n is an integer of 8 to 24 and x can be equal to or different from n; O(CH2CH2O)y and (CH2CH2O)m are polyoxyethylene groups, wherein y is an integer of 1 to 30 and m is an integer of 1 to 30, and y can be equal to or different from m; Y is an anionic group; and M is Na<+>, K<+> or NH<4><+> ions. A preparation method includes the following steps: 1) preparing an alkylphenol polyoxyethylene ether hydroxymethyl intermediate; 2) preparing a tri-alkylphenol polyoxyethylene ether nonionic surfactant; and 3) preparing the tri-anionic-nonionic surfactant. The surfactant has excellent alkali resistance, salt resistance and high temperature resistance, is excellent in dispersing property and anti-decomposition capability, has excellent compatibility with a polymer and is suitable for the fields of development and exploitation of oil reservoir in severe conditions, such as high temperature, high slat, thick oil, low permeation and the like.

The invention discloses a method for producing o-nitroaniline by multiple series-connected kettles. The method comprises the following steps of: adding ammonia water and o-chloro nitrobenzene to eight series-connected ammonification autoclaves, and carrying out ammonification reaction on materials when the content of the materials in each autoclave reaches 45-55%; adding ammonia water and o-chloro nitrobenzene to the first and second ammonification autoclaves when the temperature of each ammonification autoclave reaches 185-195 DEG C and the pressure reaches 4.0-4.4Mpa, and adding liquid ammonia to the fourth and sixth ammonification autoclaves at the same time; discharging the materials in the eighth ammonification autoclave to a discharge buffering tank, and then discharging to a flash distillation tank; washing the depressurized materials flash-distilled by the flash distillation tank with water to obtain an ammonified mixture; and pumping the ammonified mixture to a rectifying tower for rectifying, returning o-chloro nitrobenzene to the ammonification process from the tower top for continuing reaction, cooling o-nitroaniline in the tower kettle, and discharging to a finished product tank. In the invention, continuous kettle type ammonification and rectifying separation process are combined, thereby achieving the purposes of improving the productivity, saving the energy and reducing the consumption.

The invention relates to a method for treating lead-containing wastewater by using corn stigma as a biomass adsorbent. The method comprises the steps as follows: (1) the corn stigmas is washed, dried and sheared, wherein the average length is 3-4 cm, so that corn stigmas biomass adsorbent is obtained;(2) the pH value of the lead-containing wastewater to be treated is regulated to 1.0-6.0, the above corn stigmas biomass adsorbent is added, and oscillation and adsorbing are performed, wherein the use amount ratio of the lead-containing wastewater and the corn stigmas biomass adsorbent is (30-50mL):(0.05-0.25g), the adsorption temperature is 20-30 DEG C, and the adsorption time is 0.5-10 h. According to the invention, compared with other biomass adsorbent, the biomass adsorbent adopted in the method has the advantages as follows: the preparation process is simpler, the steps are less, the raw materials of the adsorbent are wide in source, and cheap in price, and belong to agricultural wastes; the prepared corn stigma biomass adsorbent has a good treatment effect on heavy metal at low concentration, is over 95 percent in the adsorption rate, and the adsorption can be basically completed within 30 minutes.

The invention relates to a method for preparing a 4A zeolite molecular sieve with illite-containing kaolin. The method comprises the following steps of: (1) calcining illite-containing kaolin and NaOH particles together at the temperature of 250-400 DEG C for 2 hours, activating, cooling, grinding and smashing to obtain alkali-calcined kaolin; (2) mixing the alkali-calcined kaolin with a certain amount of distilled water, stirring at the temperature of 60 DEG C for 2-4 hours to obtain a gelatination product, and stirring the gelatination product at the temperature of 90 DEG C for 2-4 hours to obtain a crystallization product; and (3) leaching the crystallization product, washing and drying to obtain the 4A zeolite molecular sieve. The illite-containing kaolin is taken as a raw material, so that the adverse effect on a synthetic molecular sieve caused by incapability of activating illite serving as a difficultly-separable mineral in kaolin ore during low-temperature calcining is reduced effectively, the calcining temperature is low, and the energy consumption is low.

Disclosed are a new Mercury-free flat light source structure capable of enhancing and adjusting brightness, maintaining stable and uniform discharge, and improving luminous efficiency, and a large flat light source apparatus using the same Mercury-free flat light source structure as a unit cell capable of adjusting the brightness and causing local discharges in selected areas, and a driving method thereof. The flat light source structure according to the present invention includes an upper substrate made of a light transmitting material; a lower substrate separated from the upper substrate by a distance; a barrier rib for maintaining the distance, thereby defining a discharge space filled with a discharge gas with a predetermined pressure; a phosphor coated on at least one of the inner surfaces of the upper substrate and the lower substrate, respectively; a pair of main electrodes disposed at predetermined positions on the surface of the upper or lower substrate and applied with a predetermined driving voltage, frequency and duty ratio to excite the phosphor by plasma generated due to electric field induced in the discharge space; an auxiliary electrode formed at a predetermined position on the lower and/or upper substrate(s) to have a parallel component which is parallel with any one of the main electrodes when viewing the discharge space from the upper substrate and a perpendicular component which traverses the electrodes across the pair of main electrodes.

The invention provides a triple anionic-nonionic surfactant, and a preparation method and application thereof, belonging to the technical field of surfactants. The preparation method of the inventioncan overcome the technical problems of generation of inorganic salts, randomness of products, low yield and the like in conventional preparation methods. According to a technical scheme in the invention, the preparation method comprises the following two steps: preparation of a hydroxymethyl alkyl phenol polyoxyethylene ether intermediate; and preparation of the triple anionic-nonionic surfactant.The triple anionic-nonionic surfactant is applicable to exploitation of high-temperature high-salt petroleum reservoirs.

The invention discloses a long-distance pipeline wax-cleaning agent and a wax-cleaning conveying technology method. The wax-cleaning agent is prepared by complex formulation of crude oil, 0 # diesel oil and solvent oil 90 #, wherein the crude oil comprises lower than 6% of wax and has a solubility parameter of 7.0-8.0, and the weight ratio of crude oil: 0 # diesel oil: solvent oil 90 # is 6-8:3-1:1. The wax-cleaning conveying technology method comprises the following steps: 1) estimating the effective volume of a pipeline for wax cleaning; 2) mixing the 0 # diesel oil and the solvent oil 90 # in a weight ratio of 3-1:1, and then mixing the crude oil and a diesel oil and solvent oil mixed solution in a weight ratio of 6-8:1; 3) heating to enable the output temperature to be 50-70 DEG C; 4) pumping a wax-cleaning agent mixed solution into the pipeline from a first station in three times with the dosage for each time being the effective pipeline volume, when oil head arrives a terminal station, testing the wax content of the wax-cleaning agent, and stopping pipeline conveying for 3 days; 5) in sixth and ninth day later, repeating the steps of 2) to 4), and performing the second and third addition of the wax cleaning agent, testing the wax content of the wax-cleaning agent at the terminal station in every 2 hours, and calculating the wax dissolving rate; and 6) outputting from the terminal station.

The invention discloses an electrode capable of reversing polarity, and application thereof. The electrode comprises a substrate, a middle layer and a catalyst layer, wherein the substrate comprises metal or alloy thereof; the middle layer is arranged on the substrate and comprises platinum group metal and platinum group metal oxide; and the catalyst layer is disposed on the middle layer, and the catalyst layer includes a mixed metal oxide. The electrode can be used as an electrode for electrolysis, electrodialysis or electroplating. The electrode can meet the working environment requirements of the cathode and the anode at the same time, the environmental tolerance is improved, and the protection of the substrate is realized; and polarity reversal can be carried out, and sediments on the surface of the electrode can be quickly and efficiently cleaned.

The invention relates to a method for capturing and separating effective components in liquorice by utilizing a mixed-mode agarose gel medium. The method is characterized in that the mixed-mode agarose gel medium with ion exchange and hydrophobic ligands is used for capturing and separating acidic saponin substances and flavonoid substances in liquorice; the two substances are effectively adsorbedin the agarose gel medium in an adsorption mode, and effective separation of the acidic saponin substances and the flavonoid substances is realized by changing the pH value of an eluent. According tothe method for capturing and separating liquiritin and glycyrrhizic acid substances in liquorice, the result can approximately reach that the purity of the liquiritin substances is 65%-95%, and the yield is 80%-98% (calculated by taking the liquiritin as a standard substance); the purity of glycyrrhizic acid substances is 60-95%, the yield is 75-95% (calculated by taking ammonium glycyrrhizinateas a standard substance), the purity and the yield are relatively high, and the method has important significance for a component separation process of natural products and a traditional Chinese medicine extraction and purification process.

The invention relates to a sodium hydrogen selenite preparation method which includes the steps that: (1) the selenium dioxide is dissolved in water to generate solution I; (2) the sodium hydroxide is added to the solution I; the PH is adjusted to equal to 2-9, so as to obtain the solution II; (3) the solution II is evaporated, condensed and crystallized to obtain crystal water sodium hydrogen selenite; (4) the crystal water sodium hydrogen selenite is dried to obtain the sodium hydrogen selenite product. The sodium hydrogen selenite preparation method is a safe, efficient and environmental protection preparation process; the preparation adopts the selenium dioxide, water and sodium hydrate as the source materials to generate the sodium hydrogen selenite and water; and then the water is removed to obtain the target product. The sodium hydrogen selenite preparation method has the advantages of generating no other hazardous substance in the production process, simple steps, convenient operation condition, easy industrial popularization and application.