41results about How to "No production" patented technology

The invention belongs to the field of new energy battery materials, and comprises a method for producing battery-grade ferric orthophosphate from titanium dioxide solid waste. The method comprises thefollowing effective steps: adding water for thoroughly dissolving the titanium dioxide solid waste, adding a flocculant, and then performing multi-stage sedimentation filtration to obtain a high-purity ferrous sulfate solution; thoroughly mixing the prepared ferrous sulfate solution and a phosphorus source solution according to a molar ratio of 1:1 in a reaction kettle, then controlling the pH ofthe solution to be 5-7, controlling the temperature at 25-35 DEG C, reacting for about 2 hours while stirring to obtain a ferrous phosphate slurry and sodium sulfate; filtering and washing the ferrous phosphate slurry and the sodium sulfate after a reaction to remove sodium sulfate, slurrying a filter cake after washing, and dispersing and sanding the ferrous phosphate slurry; mixing the sanded ferrous phosphate slurry and phosphoric acid according to a molar ratio of 1:1 to 1:2 in the reaction kettle, adding an oxidizing agent, thoroughly reacting, heating the slurry to 80-100 DEG C, and aging for 2-3 hours; cooling a ferric phosphate slurry after the reaction, washing and performing tympanic membrane suction filtration, then conveying and drying to remove free water, and then removing crystal water through calcination to obtain the battery-grade ferric orthophosphate.

The invention provides a tomato gray mold antagonistic strain B-04-glu which is characterized by comprising four steps for the preparation: firstly, a strain of Bacillus cereus for high-efficient antagonistic gray mold is filtered from a soil sample infected by gray mold, and is named as B-04; secondly, bacteria solution which contains the B-04 bacteria is cultured; thirdly, ultrapure water, 1mM Hepes and electric shock buffer solution are used for washing in turn; fourthly, beta-1, 3-dextranase genes are transformed into the B-04 bacteria through electric shock method, and then the antagonistic strain B-04-glu is obtained. The antagonistic strain B-04-glu belongs to biological prevention and cure and does not contain compositions such as pyrilamine, pyrrole, acylamide and so on of chemical pesticide, thereby the antagonistic strain B-04-glu has the advantages of innocuity, no environmental pollution, difficult production of drug resistance, no residue, easy production, long effective period, strong curing ability, good application effect, safety on non-targeted organisms and so on and has wide application prospect.

The invention relates to a preparation method for producing biodiesel by means of animal and plant waste oil at a high acid value, and belongs to the technical field of energy-saving environment-friendly biodiesel manufacturing. The method is characterized in that the collected animal and plant waste oil at the high acid value is processed according to the steps of degumming, pre-esterification, ester exchange, adsorption and decoloring and the like. Ferric sulfate is taken as a pre-esterification catalyst, is low in price and easy to take, does not have high requirements for a reaction kettle and is easy to separate after catalyzation is finished; the catalyst can be reused after being processed, and cost is effectively reduced. During the ester exchange stage, ethyl acetate is added, the reaction speed is increased, complete separation of coarse methyl ester and glycerin is accelerated, washing is not needed in the refining process of the coarse methyl ester, and waste water is prevented from being produced. The yield of products produced in the method is high, and the products meet the requirement of the GB/T2007 standard in China about biodiesel (BD100) for diesel fuel mixing. No waste water is produced in the whole process of production, and the method is environmentally friendly.

The invention relates to a hydraulic machine for single-piece fiber cement plate pressing. The hydraulic machine is characterized by comprising a hydraulic machine body and a multi-station conveying device, the hydraulic machine body is arranged in the middle of the multi-station conveying device, the multi-station conveying device comprises a conveyer belt, a driving roller, two tensioning rollers and a high-pressure water cleaning roller, the driving roller, one tensioning roller, the high-pressure water cleaning roller and the other tensioning roller are arranged in sequence to form the cyclic multi-station conveying device, a plate blank conveying machine and a dewatered plate blank conveying machine are arranged on the left side and right side of the hydraulic machine body, and plate blank suckers are arranged above the plate blank conveying machine and the dewatered plate blank conveying machine respectively. The hydraulic machine has the advantages that a plate blank or a pressed dewatered plate blank is directly conveyed to the pressing station or stacking station through the multi-station conveying device extending to the two ends of the hydraulic machine body, and vertical drainage can be achieved quickly during pressing due to the fact that the plate blank is conveyed through the fibrage conveyer belt.

The invention relates to a high-reliability clutch mechanism which comprises an inner shaft sleeve 1, an outer sleeve ring 2 and a driving component, wherein the outer edge of the inner shaft sleeve 1 is at least provided with a wedge-shaped groove; the driving component is arranged in the wedge-shaped groove, and the driving part, the outer sleeve ring 2 and the wedge-shaped groove form a one-way close fit structure capable of realizing forward-rotation clamping. The high-reliability clutch mechanism can be used for solving the problems of high fault occurrence possibility, poor reliability and high abrasion possibility of an existing clutch mechanism, has the advantages of high operation reliability, high stability, low noise, simple structure, easiness for manufacturing, high durability and the like, and is mainly used for manufacturing clutch devices of various vehicles and power devices.

Disclosed are a ferrite catalyst, its preparation method and use. The catalyst has a formula of FeA_aD_bO_c, wherein A is Mg atom, Zn atom or a mixture of these two atoms in any ratio; D is one or more atoms elected from the group consisting of Ni, Co, Mn, Ca, Mo or V; a=0.01˜0.6; b=0˜0.30; c is a number satisfying the valence. The catalyst is prepared by a method comprising mixing the metal oxide precursors according to the chemical ratios and grinding by ball milling to obtain the ferrite catalyst. The catalyst exhibits excellent activity and selectivity when used in a reaction for preparing butadiene by oxidative dehydrogenation of butene. The preparation of the catalyst is simple, controllable and well repeatable, with reduced waste water and waste gas during preparation.

The invention discloses a high-frequency and high-speed frequency testing system based on a phase locking technique, comprising a standard signal source, a power supply device, a PCB (printed circuit board), a plurality of testing units arranged on the PCB and a data storage and display device, wherein the standard signal source is electrically connected with each testing unit respectively; each testing unit comprises a data acquisition module, a phase locking module and a data distribution module; the data acquisition module is used for acquiring the signal frequency of a tested product correspondingly; the phase locking module is used for carrying out phase comparison on the acquired signal frequency of the tested product and the standard signal source so as to obtain a comparison result, driving the corresponding tested product according to the comparison result and leading the phase of the tested product to be consistently locked with the phase of the standard signal source; and the data distribution module is used for outputting a phase value of the locked tested product to the data storage and display device for storage and display. The invention also discloses a high-frequency and high-speed frequency testing method based on the phase locking technique.

The invention belongs to the technical field of environmental protection, and relates to the recycling of chromium-rich sludge, in particular to a method for producing chromium sesquioxide through chromium-rich sludge. The method comprises the following effective steps: a, firstly, washing and drying chromium-containing sludge; b, then, evenly grinding the dried chromium-containing sludge, transferring the chromium-containing sludge into a calcining kiln to directly heat the chromium-containing sludge, increasing the temperature of the chromium-containing sludge to 530 to 570 DEG C within 1.5to 2 hours, and then maintaining the temperature for 1 to 1.5 hours; c, transferring the chromium-containing sludge into a cooling kiln after heating is accomplished, reducing the temperature of the chromium-containing sludge to 60 to 90 DEG C, adding hydrochloric acid and water at the end of cooling, and uniformly stirring; d, transferring the uniformly stirred chromium-containing sludge into a filter press to perform filter pressing on the chromium-containing sludge, and washing filter residue to be neutral; e, adding water and hydrofluoric acid to the washed filter residue, stirring for 0.5hour, then transferring the filter residue into a filter press to perform filter pressing on the filter residue, and washing the filter residue to be neutral; f, then transferring the filter residueinto a high-temperature calcining kiln, performing burning and heating on the filter residue through coal gas, increasing the temperature of the filter residue to 1320 to 1400 within 2 hours, maintaining the temperature for 50 to 80 minutes, and then transferring the filter residue into the cooling kiln to reduce the temperature of the filter residue to below 40 DEG C, so as to obtain a finished product namely the chromium sesquioxide.

The invention mainly relates to a preparation method of a supported composite catalyst for oxidative synthesis of folic acid from 6-R-tetrahydrofolic acid. The preparation method of the supported composite catalyst for oxidative synthesis of folic acid from 6-R-tetrahydrofolic acid comprises the following steps: suspending a certain amount of a SBA-15 molecular sieve in chloroform/ethanol (2: 1) solution accounting for 10 times of the volume of the SBA-15 molecular sieve, adding a certain amount of tetraphenylporphyrin, conducting dissolving while stirring, performing refluxing for 2 hours, adding a certain amount of ethanol/water (5: 1) solution of nickel acetate and manganese acetate, and continuing refluxing for 4 hours; and carrying out filtering, performing washing with distilled water three times, and carrying out drying in vacuum to obtain the supported composite catalyst. The catalyst is used in a reaction for synthesizing folic acid through hydrogen peroxide oxidation of 6-R-tetrahydrofolic acid, and catalytic effect is good. The catalyst accounting for 2% of the weight of the raw material is used, the purity of the refined folic acid product can reach 98.5% or above, and yield is 90% or above.

The invention discloses a preparation method of a poly(ethylene oxide) and organic quicklime composite drying agent. According to the preparation method, quicklime is introduced into a vacuum ball mill tank of a planetary ball mill, air in the vacuum ball mill tank is removed via pumping, nitrogen is introduced into the vacuum ball mill tank, ethylene oxide is added, grinding is carried out, and after grinding, an obtained product is taken out from the vacuum ball mill tank and is dried so as to obtain the poly(ethylene oxide) and organic quicklime composite drying agent. The poly(ethylene oxide) and organic quicklime composite drying agent is excellent in moisture absorption effect; reaction after water absorption is mild; safety is high; preparation process is simple; cost is low; no side product is generated; and the preparation method is friendly to the environment, and is suitable for large-scale production.

An unfolding device is used to unfold a folded face of a blank of a folding box, and is suitable for paper, card paper or a paperboard as the blank of the folding box. A fixed unfolding body is disposed in the unfolding device, and the unfolding body is installed a scope of a conveying device conveying the blank. The unfolding device is characterized in that the unfolding body is a cone or a pyramid especially a side face of a cone or a pyramid. The unfolding device is advantageous in that the folding box and the unfolding device can perform long-term contact through a pyramidal unfolding device model not according to the shape of the blank so that safe folding without loss can be performed.