37results about How to "Easy desorption and regeneration" patented technology

The invention discloses a metal organic skeleton-graphite oxide nano composite adsorption material and a preparing method thereof. The material is composed of graphite oxide and chromium-based metal organic skeleton. The preparing method of the material comprises the following steps of: dissolving chromium nitrate and terephthalic acid in deionized water, stirring and simultaneously adding hydrofluoric acid dropwise, then adding graphite oxide and uniformly stirring to obtain reaction liquid, and conducting hydro-thermal reaction under program temperature controlling; and after sequentially conducting washing with water and washing with ethanol for the decomposed materials, centrifuging, drying and obtaining the metal organic skeleton-graphite oxide nano composite adsorption material. Theadsorption capacity of the adsorption material for hydrocarbon volatile organic matters is greatly increased, and the adsorption material is easy for desorption and regeneration. The preparing methodhas simple process and low cost.

The invention discloses a method for adsorbing and separating a sulfur-containing acid gas. The method comprises the following step: by taking an anion-containing metal-organic frame material as an adsorbent, selectively adsorbing the sulfur-containing acid gas in a gas mixture so as to obtain a purified gas, wherein the sulfur-containing acid gas comprises one or more of sulfur dioxide, sulfur trioxide and hydrogen sulfide. The anion-containing metal-organic frame material used in the method has a great number of regularly arranged inorganic anion functional groups with negative electricity, the size of the aperture of an MOF material can be adjusted in a controllable manner by adjusting the size of organic ligand, or a three-dimensional channel spatial structure can be adjusted through an interpenetration structure. The inorganic anions with negative electricity can form an electrostatic environment in a limited space of the MOF material, sulfur-containing acid gas molecules can be selectively adsorbed by virtue of an electrostatic effect of the electrostatic environment and lacked electron atoms of the acid gas, and thus high-capacity high-selectivity separation of the sulfur-containing acid gas can be achieved.

The invention discloses a method for reducing and removing metal impurities from ammonium molybdate solution by using ion exchange resin, relating to the deep purification technology of the ammonium molybdate solution in chemical industry field. The method comprises the following steps: firstly selecting three suitable cationic exchange resins according to the kinds and contents of the impurities metal ions in a molybdenic acid solution; adopting ammonium water to implement transamination treatment for the resins, and putting the resins in the ion exchange columns which are serially connected according to a certain order; regulating the to-be-treated ammonium molybdate solution to be weakly acidic with nitric acid, and leading the treated ammonium molybdate solution through serially connected ion exchange columns in turnat a certain speed for implementing ion exchange treatment; and adopting the ammonium water to adjust the ammonium molybdate exchange processing liquid subjected to columns treatment to alkalescence after the exchange treatment is finished. The method can uniformly reduce the concentration of the impurities metal ions in the ammonium molybdate solution to be lower than 3 ppm, and the metal ions comprise calcium, magnesium, aluminum, zinc, ferrum, nickel, copper, cadmium, chromium, manganese, bismuth and plumbum; and the method cannot change the components and the concentration of the ammonium molybdate solution. The ion exchange resins can be reused, so that the operation cost can be efficiency reduced, and the continuous impurity removing production in large-scale can be realized.

The utility model relates to a refining method of by-product HCl gas in organic chlorine production process, the by-product HCl gas passes by the absorption post filled with absorption resin at flow speed of 0.1-0.5m / s under constant-temperature constant-pressure, the removal ratio of the organic in the HCl gas can reach 99.8 percent, afterwards the absorption resin that absorbs the organic is desorbed by 110-160 DEG C saturation vapor, the desorption ratio can exceed more than 99 percent, the desorption liquid is condensed, oil-gas separated, recycled to obtain the organic mixture containingbenzene or chlorobezene, the mixture is furthermore distilled and separated to obtain the benzene or chlorobezene, finally the absorption resin after desorbed by the vapor is dried by 110-140 DEG C hot air, and then cooled to room temperature for next stage absorption. The absorption resin can be reused after desorption and regeneration.

The invention discloses a modified polyamino macroporous resin, a preparation method and a waste gas treatment method for acrylic acid production. The modified resin is an amino-modified macroporous resin. Compared with the ordinary macroporous resin, due to the special interaction between the amino group and the carbonyl hydrogen molecule, it has a better adsorption effect on acrolein and under alkaline conditions. Easy to desorb and regenerate, with stable performance. The resin of the invention can realize the recovery of toluene in the waste gas of acrylic acid, return it to the acrylic acid refining process and use it as an azeotroping agent for recycling, and realize the resource utilization of waste gas. At the same time, the exhaust gas after adsorption treatment meets the national emission index requirements, reducing the waste gas incineration treatment and further reducing energy consumption, resulting in great environmental protection and obvious economic benefits.

The invention discloses a treatment method of waste water in hydroxybenzoic acid production, which is characterized by comprising the following steps of: (1) conducting pretreatments of acidation, precipitation and filtering on waste water; (2) conducting adsorption treatment on the filtrate obtained in the step (1) at the temperature of 5-40 DEG C and at the flow of 0.5-2 column volume per hour through an adsorption column filled with modified macroporous absorbent resin; and (3) conducting biochemical treatment on the adsorption effluent obtained after step (2). The p-hydroxybenzoic acid recycled by the method and the intermediate thereof can be reused as raw materials in the original production technique, and waste water treatment and recycling of waste are realized simultaneously. Themethod has good waste water treatment effect, is easy for desorption and regeneration, reduces the use amount of the modified macroporous resin, and is easy for industrialized implementation.

The present invention is process of treating effluent from the production of dye intermediate 1-amino-8-naphthol-3, 6-disulfonic acid and recovering resource. The process includes: distilling pre-treatment of the effluent; adsorbing 1-amino-8-naphthol-3, 6-disulfonic acid, intermediate product and other organic matter from the effluent with macroporous weak alkaline resin ND900 in serially connected three column; neutralizing the adsorbed columns treated water with alkali and decompression distilling; and final aerobic biochemical treatment for the water to reach exhaust standard. The processcan reduce CODcr in the effluent from 16,700 mg / l to below 100 mg / l. The used resin may be desorbed with NaOH+H2O desorbing agent for reuse, and the desorbed liquid may be distilled for recovery.

The invention discloses an ultra-microporous ionic polymer material based on hyperbranched ionic liquid and preparation and alkyne / olefin separation application thereof. The ultra-microporous ionic polymer material has the characteristics of high anion density and narrow pore size distribution, and the structural properties are regulated and controlled by changing a hyperbranched structure and anion and cation types. High-selectivity separation of acetylene and propyne is realized by utilizing a strong hydrogen bond environment constructed by high anion density and a size screening effect, sothat alkyne in alkyne and olefin mixed gas is removed to a very low degree, and olefin gas with extremely low alkyne content is obtained. The material prepared by the method has the advantages of highstability, simple preparation, strong controllability of material structural properties, good adsorption performance, easy desorption, greenness, environmental protection, and good industrial application prospect.

The invention discloses a modified macroporous resin and a method for treating wastewater produced by butyl acrylate. The modified macroporous resin is a macroporous resin modified by amino groups. Compared with ordinary macroporous resins, due to the special intermolecular effect of amino groups on carboxyl groups and hydroxyl groups, it is effective against acrylic acid, n-butanol, and polymerization inhibitors. Better adsorption effect, easy desorption and regeneration, stable performance. The present invention can recycle components such as acrylic acid, n-butanol, and polymerization inhibitor in butyl ester wastewater, and use them as raw materials for butyl ester esterification reaction to realize resource utilization of waste materials and produce obvious economic benefits; moreover, the treated wastewater can reach national According to the requirements of the wastewater discharge index, it can be directly discharged into the sea, which can reduce the pressure of subsequent wastewater treatment and produce great environmental benefits.