81results about How to "Raw materials are safe and easy to obtain" patented technology

The present invention discloses a konjac bean curd. The konjac bean curd comprises the following effective components in parts by weight: 50-60 parts of konjac flour, 5-6 parts of dietary alkali and 2,500-3,000 parts of pure water, and each of the raw materials is safe and easily obtained. At the same time, the present invention also discloses a handmade method of the konjac bean curd. The dietary alkali and konjac flour are respectively dissolved using different methods, and then the two materials are subjected to a gel reaction to produce the konjac bean curd. The method is simple and easy to realize, and controllable in whole processes, can help people to make the fresh, healthy and assured favorite food by themselves at home without leaving home, and enriches a table life of a majority of ordinary people.

The invention relates to the technical field of industrial smoke nitric oxide emission reduction and denitrification and relates to a novel SNCR (selective non-catalytic reduction) and SCR (selective catalytic reduction) hybrid denitrification system. The novel SNCR and SCR hybrid denitrification system comprises a preparation and storage module, a conveying circulating module, a metering and diluting module, an on-line NOX monitoring module, an automatic control module, a distribution module, a spraying module, a boiler and an SCR reactor. According to the novel SNCR and SCR hybrid denitrification system, an existing SNCR and SCR denitrification system is improved and united, so that full-automatic intelligent operation is realized; the automatic control module can accurately calculate a demand of a denitrification reducing agent by monitoring a nitride generation amount and other data in smoke gas on line and in real time according to the real-time change of a load of the boiler and feed back information to the metering and diluting module; the metering and diluting module can quickly adjust corresponding equipment to accurately provide the corresponding amount of the reducing agent to the distribution module and the spraying module; the reducing agent and smoke gas are sprayed in the boiler and a flue and are then mixed to enter the SCR reactor to implement denitrification reaction; therefore, the beneficial effects of high denitrification efficiency, high automation degree, low investment cost and good denitrification effect are achieved.

The present invention discloses the preparation process of CdSe / CdS, CdSe / ZnS and other II-VI type core-shell quantum dot. The CdSe / CdS and CdSe / ZnS core-shell quantum dot are prepared with cadmium acetate, zinc acetate or other inorganic compound, instead of Cd(CH3)2, Zn(CH3)2 or other inflammable, detonable and expensive organic metal compound, as material. The prdouct has excellent single dispersivity, improved fluorescent property, high quantum yield, high stability, and may be used widely as the fluorescent mark for biological detection and analysis.

A preparation method of high-efficiency photocatalyst SrTiO3 relates to the field of functional materials. The strontium titanate precursor is prepared by thermal decomposition through organic metal strontium salt and organic metal titanium salt, and then calcined to obtain high-efficiency photocatalyst SrTiO3. Mix strontium acetylacetonate, isopropyl titanate and an organic solvent, stir at 30-40°C to dissolve completely; heat up to 80-160°C, then stir at constant temperature for 1-2 hours; increase the temperature by 20°C, then Stirring at a constant temperature for 4-8 hours to prepare a strontium titanate precursor; washing the strontium titanate precursor, then centrifuging and drying to obtain a powder; calcining the powder at 300-900 ° C for 1-3 hours to obtain SrTiO3. The selected raw materials are safe and easy to obtain, the process steps are simple, pollution-free, and the equipment requirements are low. The prepared strontium titanate high-efficiency photocatalyst can effectively degrade the methylene blue solution, has high photocatalytic activity, and can be reused for many times.

The invention provides a preparation method and an intermediate of pinoxaden. The preparation method includes: using 2-methylacrolein as a raw material; subjecting the raw material to cyclization andaromatization to obtain herbicide-pinoxaden. Compared with the prior art, the preparation method has the distinguishing features and the advantages that a completely different preparation strategy isadopted; a completely different nonaromatic compound is used as the raw material which is safe and easy to obtain; the preparation method is few in three wastes, low in cost and conducive to industrial production.

The invention discloses a method for preparing CdSe quantum dots. CdSe quantum dots with different particle sizes are prepared under relatively mild conditions by using cadmium oxide and selenium powder as raw materials. This method can avoid the use of extremely flammable, explosive, expensive and toxic compounds such as tri-n-octylphosphine (TOP) or tri-n-butylphosphine (TBP) used in the literature, and is safe, easy and repeatable to operate. No need to use glove box, low cost. The obtained product is uniform and has good monodispersity, and the particle size is controllable. The synthesized CdSe quantum dots can be used as fluorescent labeling materials, light-emitting devices, lasers and other fields, or can be used for biological detection and analysis after further modification.