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178results about How to "Process safety and environmental protection" patented technology

Low-cost preparation method for palbociclib

The invention relates to a low-cost preparation method for palbociclib. The low-cost preparation method comprises the following steps: by taking 2,4-dichloro-5-cyanopyrimidine as an initial raw material, performing cyano Grignard and hydrolysis so as to obtain 5-acetyl-2,4-dichloropyrimidine, protecting carbonyl, performing amination, removing carbonyl, performing acylation reaction by using diketene and amino so as to obtain 5-acetyl-4-acetoacetamide-2-chloropyrimidine, performing intramolecular dehydration on the product so as to obtain 6-acetyl-8-cyclopentyl-5-methyl-2-chlorine-8H-pyridino-[2,3-d] pyrimidine-7-ketone, protecting 6 acetyl groups by using carbonyl, further realizing reaction with an aminopyridine derivative so as to obtain 4-{6-[(6-1,1 dialkoxyl) ethyl-8-cyclopentyl-5-methyl-7-keton-7,8 dihydropyridino-[2,3-d]pyrimidine-2-amino]-pyridine-3-yl}-piperazine-1-carboxylic acid tert-butyl ester, and finally performing acid hydrolysis and neutralization to obtain palbociclib free alkali. By adopting the low-cost preparation method, the raw materials are easy to obtain, the cost is low, and the environment can be protected.
Owner:XINFA PHARMA

Three-phase, multi-way vacuum interrupter switchgear with internal ground switches

A three-phase vacuum interrupter switch assembly for power distribution systems comprises an outer case having at least one window and containing a plurality of component assemblies. The case interior is preferably free of oil and / or SF6 gas. Each component assembly comprises three internal disconnect switch assemblies, three vacuum interrupter bottle switch assemblies and three ground switch assemblies. Each vacuum interrupter bottle switch is coupled in electrical series with a corresponding internal disconnect switch assembly. Because the open / closed state of a bottle switch is not directly observable owing to its sealed interior, a direct visible indication of the state of the three-phase vacuum interrupter switch assembly is provided by a visually detectable contact rod of the corresponding internal disconnect switch that is visible through the case window. To prevent potentially serious damage caused by arcing between the contacts of the internal disconnect switch, the internal disconnect switch is prevented from opening or closing when the bottle switches are closed.When the component assembly is deactivated, some residual current may still remain. The ground switch assembly associated with the component assembly grounds such residual current as part of the deactivation process so that it is safe to have maintenance work performed. An interlocking mechanism ensures that the disconnect switch assembly, vacuum interrupter bottle switch assembly and ground switch assembly of each component assembly are opened and closed in a sequence that ensures proper and safe operation.
Owner:IMPACT POWER LLC A DELAWARE LLC

Manufacturing method for warm rolling of stainless steel/carbon steel composite board

The invention relates to the technical field of composite board production, in particular to a manufacturing method for warming rolling of a stainless steel / carbon steel composite board. According tothe method, a selected stainless steel board blank and a carbon steel board blank are subjected to surface treatment, then the composite contact side of stainless steel and carbon steel is coated withan impervious layer, drying is carried out at room temperature, then the two blanks are arranged in an aligning manner and symmetrically combined into a blank, the periphery of the composite blank obtained after combination is welded and sealed and subjected to vacuumizing treatment, then the composite blank is placed into a heating furnace to be subjected to multi-pass rolling, the composite blank is cooled in air after being rolled, and cut face smoothness treatment is carried out. According to the method, the stainless steel board blank is coated with the impervious layer, at a specific heating temperature section and heat preservation time, the stainless steel is protected, and the situation that in the rolling process, due to element dispersing, performance of the composite board isreduced can be avoided. By means of the impervious layer, mutual dispersion between Cr and C elements in the rolling process at a high temperature can be effectively avoided.
Owner:KUNMING UNIV OF SCI & TECH

Method for preparing anti-oxidization active camellia olefera cake polysaccharide

The invention relates to a method for extracting polysaccharide, in particular to an anti-oxidization polysaccharide extraction method in which camellia olefera cakes are used as raw materials. The method comprises the following specific steps: crushing the camellia olefera cakes to 60-80 meshes; adding into an aqueous solution with pre-dissolved cellulase (the enzymatic activity is greater than 15,000 u / g) for extraction, wherein the mass ratio of the cake powder to the aqueous solution is 1: (20-40); the using amount of the cellulase is 0.3-0.4% of the weight of the cake powder; the extraction temperature is 45-55 DEG C; and the extraction time is 3-5 hours; filtering the extract, concentrating, adsorbing by using polyamide for 8-12 hours, and eluting with deionized water; collecting the eluent, concentrating, adding 3-5 times of ethanol, and precipitating for 12-36 hours; and centrifugating to obtain precipitates after ethanol precipitation, and freezing and drying to obtain the grey white polysaccharide. According to the method, camellia olefera processing waste is fully utilized; the technical process is safe and environment-friendly; no toxic chemical reagents are used; and a new way for fully utilizing the camellia olefera processing waste is supplied.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY

Treatment method of waste water produced by adopting castor oil to prepare decanedioic acid

The invention belongs to the treatment technical field of decanedioic acid produced waste water, and particularly relates to a treatment method of waste water produced by adopting castor oil to prepare decanedioic acid, which adopts the technical scheme that: scrap iron is firstly added into an oxidation pond to form a stationary bed layer of solids; then the waste water with the solid foreign matters being filtered is discharged into the oxidation pond, and simultaneously the hydrogen dioxide solution oxidant with the concentration of 30 percent is added to the oxidation pond; air is sent into the oxidation pond through a blower; finally sulfuric acid is added into the oxidation pond to adjust the pH value to be 3 to 4, three-phase catalytic oxidation reaction is carried out, the active ingredient of catalyst is green copperas, the reaction temperature is 50 DEG C to 60 DEG C, and the reaction time is 4h to 8h; and after the reaction is ended, the waste water after being treated is discharged into a waste water adjusting pond, flocculating agent is also added into the waste water adjusting pond, and the well-treated waste water can be obtained after filtering the suspended substances and precipitates The method has simple process and moderate reaction conditions, is free from requiring the high temperature and high pressure, is easy to operate, has fast reaction speed, less equipment investment, high treatment efficiency, high removal rate of phenol in the waste water and no secondary pollution, and is environment-friendly and safe.
Owner:SHANDONG TIANXING BIOTECH

Sludge treatment process and system

The invention discloses a sludge treatment process which comprises the following steps: (1) sterilizing sludge so as to kill microorganisms in the sludge; (2) dewatering and drying the sterilized sludge so as to reduce the water content of the sludge; (3) separating the dried sludge, carrying out high temperature plasma treatment on the separated sludge, and burning separated smoke; (4) carrying out sludge-smoke separation on smoke generated by reburning treatment, carrying out high temperature plasma treatment on the separated sludge again, and purifying and cooling the separated smoke. The invention further discloses a sludge treatment system capable of carrying out the sludge treatment process. The sludge treatment system comprises a sterilizing device, a dewatering device, a drying device, a plasma gasifying or plasma vitrifying device and a purifying device. The sludge treatment system can realize harmless, reducing and resourceful treatment for the sludge and does not generate secondary pollution, is safe and reliable, and can realize thorough treatment for the sludge.
Owner:山东博润环保科技有限公司

Active material for cathode film, polyether polymer composition for cathode film, cathode film, and method for producing cathode film

The present invention relates to a technique for producing a cathode film having a thin and even thickness and having stable electrical characteristics at a high productivity by an extrusion molding method. That is, the present invention provides an active material for a cathode film comprising a lithium compound having a void fraction of 0.36 or less and a polyether polymer composition for a cathode film comprising a polyether polymer, an electrolytic salt compound which is soluble in the above polymer and the active material for a cathode film described above. The object described above can be achieved by extrusion-molding them.
Owner:ZEON CORP

Method for manufacturing mud rock sample by adopting white oil as refrigerant

The invention relates to a method for manufacturing a mud-rock sample by adopting white oil as a refrigerant. The method is characterized by comprising the steps of (1) drilling a mud rock sample column, namely (a) for mud cock and the mud cock with cracks, using the white oil as the refrigerant, and (b) drilling the mud rock sample column by adopting a common vertical rock sample drilling machine; (2) encapsulating a rock core column, namely (a) taking out the rock core column, putting the rock core column into heated absolute ethyl alcohol, and washing off the white oil on the surface and gaps of the rock core column, (b) sheathing a thermal shrinkable sleeve in time, and (c) baking the rock core column and the thermal shrinkage sleeve on an alcohol lamp simultaneously till the rock core column is tightly fastened by the thermal shrinkable sleeve; and (3) cutting a sample according to the permeability, namely (a) cutting the overlong rock core column of the mud rock and the thermal shrinkable sleeve on an end-surface cutting machine, wherein consistent length and permeability are required. The method has the advantages that the success rate of the sample can be increased, the rock core sample meeting the requirements can be processed, the environment-friendly effect is achieved and the labor efficiency is high.
Owner:PETROCHINA CO LTD +1

Acetoin synthesis method

The invention provides an acetoin synthesis method. The method comprises 1, catalyst preparation: mixing 4-methyl-5-beta-hydroxyethyl thiazole (I) and bromoethane according to a mole ratio of 1: 1, carrying out heating reflux in an acetoin solvent in an oil bath for a reaction, then carrying out stirring cooling to the room temperature, carrying out rotary evaporation, recovering the solvent, standing the white precipitates, carrying out suction filtration and washing, carrying out acetoin recrystallization and carrying out drying to obtain a catalyst 3-ethyl-4-methyl-5-hydroxyethyl thiazole bromide (II) and 2, carrying out acetaldehyde condensation to obtain acetoin, adding the catalyst 3-ethyl-4-methyl-5-hydroxyethyl thiazole bromide (II) into an acetaldehyde solution, adjusting pH to 9-10, carrying out heating stirring for a condensation reaction in a pressure reactor until the pressure in the pressure reactor is 0 MPa, mixing the reaction solution, the recovered solvent and solutions collected in standing, suction filtration and washing processes, and carrying out reduced pressure distillation to obtain acetoin (III).
Owner:HUAIYIN INSTITUTE OF TECHNOLOGY
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