68 results about "Thermal dissolution" patented technology

The invention discloses a silicon recovery method, which comprises: taking an industrial waste as a raw material, using an acid solution for acid leaching, filtering, and washing, then adding anhydrous sodium sulfate into an acid leaching residue, employing carbon as a reducing agent, and conducting high temperature fusion reaction so as to obtain sodium silicate, which is then subjected to thermal dissolution or high temperature water dissolution, thus obtaining water glass. The method of the invention has the characteristics of high silicon recovery rate, fewer residue, reasonable resource utilization, and adjustable water glass modulus ranging from 1 to 3.5, provides a new for industrial waste acid leaching slag silicon provides a new technological route for silicon extraction from the acid leaching residue of an industrial waste, and is conducive to resource comprehensive application of industrial wastes.

The invention relates to a method for extracting alpha-mangostin from a mangosteen fruit peel. The method comprises the following realization steps: (I) extracting the mangosteen fruit peel; (II) concentrating an extracting solution; mixing the extracting solution of every time and concentrating under reduced pressure to obtain a concentrated solution; (III) leaching the solution; (IV) carrying out silica gel column chromatography; (V) carrying out coarse crystallization; and (VI) carrying out recrystallization: adding a primary crystal into an organic solvent with the volume of 1 to 5 times to carry out thermal dissolution; placing the solution after finishing the thermal dissolution, reducing the temperature to a room temperature, carrying out recrystallization, and controlling the crystallization time to between 10 and 20 hours; and filtering and centrifugating a recrystallization liquid, drying the liquid in vacuum to obtain the 98 percent alpha-mangostin. The method has the advantages of simple process and short operation time.

The invention relates to a regeneration method and a device used for a membrane module deactivation catalyst layer in a membrane ozone catalytic reactor. The regeneration method comprises the steps of firstly, introducing air, heating and roasting to remove residual organic pollutants in a membrane module; then carrying out hot dissolution for 5-20 minutes by adopting mixed liquor of nitric acid and hydrochloric acid, and removing metal oxide attached to a membrane catalytic layer; after atomizing 5%-30% modified Mn-Si-Ti catalyst suspension, sucking under negative pressure to enable the modified Mn-Si-Ti catalyst suspension to enter a membrane supporting body, and loading the inner surfaces of holes of the suspension; and finally removing a modified Mn-Si-Ti catalyst adsorbed on the surface of a membrane separation layer by spraying and washing, and after immersing the outer surface of the membrane module into 15%-25% modified Ni-Co catalyst suspension for 5-10 minutes, drying the obtained sample at 80-150 DEG C to obtain the regenerative catalytic membrane module. By utilizing the regeneration method and the device for the deactivation catalyst provided by the invention, the deactivation catalyst can be effectively regenerated, the service life is prolonged, and the operating cost is reduced.

Disclosed is a method which can increase the dissolution efficiency in the thermal dissolution of a negative electrode active material or a composition mainly composed of the negative electrode active material that has been collected from a waste nickel-hydrogen battery, by introducing the negative electrode active material or the composition into a molten product of an alloy of an element constituting the negative electrode active material. The dissolution efficiency of the negative electrode active material or the composition mainly composed of the negative electrode active material can be increased dramatically by adding aluminum to the molten product of the alloy simultaneously with or subsequent to the addition of a negative electrode main collection product.

The invention discloses a stoichiometric analysis method for coal soluble organic matter. The method is used for performing effective and comprehensive analysis on GC / MS data, TOF-MS data and Orbitrap-MS data of the coal soluble organic matter. Firstly, an ID browser function of Mass Profiler Professional (MPP) software is used, and retrieval and comparison with standard spectrograms of a NationalInstitute of Standards and Technology (NIST) spectral library is performed to acquire structural information of compounds in measurable components of thermal dissolution matter, and subsequently principal component analysis and hierarchical cluster analysis of mass spectrometric data are realized by using R language programming in turn to study information of compound group composition and element composition, wherein the information of compound group composition and element composition is acquired by Orbitrap MS analysis of the coal soluble organic matter; sample classification information is acquired based on differences in the element composition and content of the compounds in the thermal dissolution matter; based on classification, compounds which are different among classes are acquired by using changes in multiples and t inspection; and intra-class differences are studied through molecular weight distribution, the number of carbon atoms and distribution of the number of equivalent double bonds, and the number of equivalent double bonds and distribution of relative content. The method can achieve comprehensive and efficient characterization and statistical analysis of the complex coal molecular structure at the molecular level.

The invention relates to a technique for preparing sodium dimethyl 5-sulfoisophthalate. A sulfonation kettle (a), an esterification kettle (B), an extraction kettle (C), a back washing kettle (D), a decolorization / impurity suction kettle (E), a filter (F), an intermediate crystallizing kettle (G), a centrifugal dehydrator (H), a thermal dissolution kettle (J), a fine filter (K), a terminal crystallizing kettle (L), a secondary dehydrator (M) and a drying machine (N) are used as technological equipment; and m-phthalic acid (1) and fuming sulfuric acid (2) are used as main raw materials. In the technical process of all steps, methanol (4), deionized water (7), a sodium carbonate solution (10), activated carbon (12), oxydol (13), compressed air (14), deionized water (7) and activated carbon (12) are sequentially added into related equipment according to the technical requirements to prepare the sodium dimethyl 5-sulfoisophthalate finished product (27) at specific temperature and time under technological conditions of the technical process of all the steps. The finished product has the advantages of high purity, good quality, low cost and high yield, relieves the environmental pollution, and has favorable economic and social benefits.

The invention provides an A type zeolite and a preparation method thereof. The invention solves the problems of high manufacture cost and complex process step of the A type zeolite in the prior art and the technical problems of reduced performance stability of the generated zeolite and difficult control of zeolite quality when the combustion ash, such as paddy husk ash, bagasse ash, diatomite, and the like are adopted as raw materials. The A type zeolite is prepared from burning ash, the main component of which is SiO2, as a raw material in an alkaline solution through hydrothermal reaction. The method comprises the following steps of: hydrothermally dissolving the burning ash in the alkaline solution; adding sodium metaaluminate for crystallization; washing in water, filtering and dryingto obtain the A type zeolite. The method has shorter reaction time, high crystallizing speed, more favorable and stable performance of the generated A type zeolite and obvious economic benefit, obviously reduces the production cost, simplifies the preparation step, and improves the yield and the market competition of products.

The invention provides a grading preparation method of a coal thermal dissolution substance and belongs to the field of coal chemical industry. The preparation method comprises specific steps as follows: coal and an organic solvent are mixed, a mixture is subjected to thermal dissolution treatment at the temperature of 360 DEG C in the atmosphere of inert gas, the coal and organic solvent mixture after the thermal dissolution treatment is centrifuged at the room temperature and washed with a thermal dissolution solvent, the organic solvent in a centrifugal washing solution is separated and recovered, and the coal thermal dissolution substance which is soluble at the room temperature is obtained; solid residues are subjected to centrifugal washing again with an N,N-dimethylformamide solvent at the room temperature, and the coal thermal dissolution substance deposited at the room temperature is obtained. The grading preparation method of the coal thermal dissolution substance realizes grading preparation of the coal thermal dissolution substance, requires no specific hot-filtration separation processing equipment in a preparation process, adopts a simple technology, and is lower in cost and applicable to industrial production, and grading extraction of the thermal dissolution substance is further helpful for follow-up processing and utilization of the coal thermal dissolution substance.