103results about How to "Reduce production safety hazards" patented technology

The invention provides a method for preparing iron-based magnetic activated carbon from by catalytic activation of radix puerariae waste residue with compound enzyme, and belongs to the technical field of activated carbon. The method comprises the steps of by taking the radix puerariae waste residue as the raw material, carrying out raw material pretreatment, preparing a radix puerariae activated substrate through catalytic activation with compound enzymes (cellulase, ligninase and pectinase), and preparing the magnetic activated carbon by doping iron, thereby obtaining the product. The method provided by the invention has the characteristics of wide raw material source, low waste material utilization cost, few production steps and low process energy consumption and no secondary pollution, and is beneficial to environment protection; the activated carbon product are excellent in adsorptive property and the magnetic properties and wide in application, and secondary pollution caused by difficult activated carbon recovery is not generated, etc. The method can be widely applied to preparation of the magnetic activated carbon by using the radix puerariae residue solid wastes as raw materials and doping iron; the activated carbon prepared by the method can be widely applied to the fields of waste water treatment, oil fume desorption and odor adsorption in food preservation and the like.

The invention discloses a water-based double-component light-cured polyurethane resin, which comprises the following components in part by mass: 10 to 60 parts of hydrophilic polyisocyanate serving as a component A, 5 to 40 parts of diol with the molecular weight of 400 to 3,000 and 10 to 50 parts of water-based hyperbranched resin containing photosensitive groups, wherein the diol and the water-based hyperbranched resin serve as components B. The resin is prepared by the following steps of: mixing the components B and the component A, adding deionized water, reacting completely with stirring, and thus obtaining the water-based double-component light-cured polyurethane resin of which solid content is 20 to 60 weight percent. The resin has a good environment-friendly effect, the preparation method is simple and facilitates industrialization, the ratio of soft and hard chain segments and the density of photosensitive groups of the prepared resin can be adjusted according to different performance requirements, and the resin has a broad application prospect in the fields of coating, adhesive and ink.

The invention discloses a multi-station automatic feeding device for sheet forming. The multi-station automatic feeding device comprises a machine frame, wherein a guide rail is fixed to the machine frame; a suction disc mechanical hand capable of reciprocating is mounted in a position corresponding to each forming station on the guide rail; the suction disc mechanical hand comprises a sliding seat mounted on the guide rail in a sliding fit way, a transverse arm transversely extending to the forming station, a suction disc fixed on the lower side at the extension end of the transverse arm and a drive device fixed to the sliding seat and used for driving the transverse arm to lift up and down; each sliding seat is in threaded connection with a transmission screw rod fixed to the machine frame; and each transmission screw rod is in drive connection with a servo motor fixed to the machine frame. Each suction disc mechanical hand can be utilized by each forming station to suck a workpiece from a previous station and convey the workpiece to the next station, so that the mechanical automatic feeding can be achieved, the labor intensity of staff is reduced, the production efficiency is improved, and the potential safety hazard in production is reduced.

A mechanical arm driven in a compound manner comprises double slide arms and drive devices. The double slide arms include the outer slide arm and the inner slide arm embedded in the outer slide arm and connected with the outer slide arm in a sliding manner. The outer slide arm is connected with a slide rail base through slide rails in a sliding manner. The drive devices are installed on the slide rail base and include the first drive device and the second drive device. The first drive device comprises a servo motor, a speed reducer and a belt wheel I. The servo motor drives a conveyor belt I through the speed reducer and the belt wheel I so that an outer profile can be driven to slide up and down. The second drive device comprises a cylinder. A piston rod of the cylinder is connected with the outer profile and pushes the outer profile to slide. Two belt wheels II are arranged on the outer profile. A conveyor belt II is assembled between the belt wheels II. The inner side of the conveyor belt II is fixed to an inner profile, and the outer side of the conveyor belt II is fixed to the slide rail base. The outer profile moves up and down so as to drive the inner profile to move up and down at a double speed relative to the outer profile. By means of the mechanical arm, the stroke is increased, space is saved, the operation precision and efficiency are improved, the material mass range is widened, and safety is high.

The invention discloses an automatic discharging die-cutting machine and belongs to the field of machinery. The automatic discharging die-cutting machine comprises a frame, a motor assembly, a die-cutting table plate and a die-cutting assembly and is characterized by further comprising a discharging assembly. The discharging assembly comprises a discharging support, a discharging arm, a suction device, a discharging motor and a transmission device. The discharging support comprises a slide way and a rocker which are mounted on a support body, and the slide way has a certain radian. The discharging arm comprises a sucker holder and a discharging arm body, and the suction device comprises a vacuum pump, a position switch, an electromagnetic reversing valve, a sucker, an air storage device and a pipeline. The discharging motor is connected with the transmission device and a travelling end of the discharging arm body sequentially, a die-cutting limiting switch and a discharging trigger switch are arranged on the frame, the die-cutting limiting switch is in circuit connection with a motor, and the discharging trigger switch is in circuit connection with the discharging motor. Compared with the prior art, the automatic discharging die-cutting machine has the advantages that automatic discharging can be realized, labor intensity is relieved for workers, and labor is saved.

The invention discloses a method for extracting lignin by using a hydrothermal and alkali synchronous activation method, and belongs to the technical field of biomass extraction from pretreated lignin. According to the method, a product is prepared by taking biomass such as ramulus mori (leaves) as raw materials, and carrying out simple process of biomass pretreatment, hydrothermal and alkali synchronous activation, acid-adjusting and precipitation of the lignin and lignin extraction. The method has the characteristics that raw materials are easily obtained and have low price; the prepared lignin product has high recovery rate and small chemical modification; the production process is simple; by the use of dilute acid, the lignin precipitates and the acidity and alkalinity of an activationsolution can be neutralized, environmental protection is facilitated and the like. The method disclosed by the invention can be widely applied to lignin extraction and also can be used for extractinghigh value natural products in the biomass; the high value transformation of the biomass is realized.

The invention belongs to the field of organic synthesis, and discloses a synthesis method for hydroxytyrosol. The method comprises a step b that: a reaction is carried out on 3-bromine-4-hydroxy phenylethanol, an alkali metal hydroxide and a copper catalyst, wherein the copper catalyst is at least one selected from 8-hydroxyquinoline copper, copper acetylacetonate and BFMO-cuprous iodide. According to the process route, hydroxyl protection and deprotection steps are omitted, bromine does not need to be replaced with methoxyl, hydroxyl substitution is achieved in a sodium hydroxide aqueous solution under catalysis of the copper catalyst, and therefore, selectivity is good, the reaction route is short, the product can be obtained only through two steps, and the problem that an existing process route is too long is solved.

The invention provides a micro-emulsified peppermint essence for cigarette paper, which comprises the following components in parts by weight: 4-15 parts of zanthoxylum-like peppermint oil, 2-10 partsof Asian peppermint oil, 1-5 parts of menthol, 5-15 parts of cyclodextrin, 10-30 parts of an emulsifier and 25-50 parts of distilled water, and is prepared by a micro-emulsification method. The micro-emulsified mint essence for cigarette paper can be well applied to cigarette paper perfuming production, can significantly endow cigarettes with mint natural characteristic aroma and cool feeling with better consistency before and after the cigarettes are smoked, and improves the smoking quality of the cigarettes.

The invention discloses a method for synthesizing 2-amino-5-chlorobenzophenone by a microchannel reactor, belongs to the field of synthesis of psychoactive drugs in organic synthesis, and solves the problems of low yield, poor purity, high risk of violent explosion, degradation caused by high reaction time under high temperature and high pressure conditions, low frequency of catalyst recycling andreuse and the like during the synthesis of a traditional catalytic hydrogenation reactor. The method for synthesizing the 2-amino-5-chlorobenzophenone in the microchannel reactor specifically includes the following steps: 1). adding hydrogenation reaction precursor 5-chloro-3-phenyl-2,1-benzisoxazole into an organic solvent, and then adding an activated-carbon-loaded noble metal catalyst to obtain a mixture as a material I to enter a preheating module of the microreactor; and 2). after preheating of the material I, injecting the material I and material II hydrogen into a reaction module groupof the microreactor for reaction, collecting a reaction solution flowing out from a cooling module, and treating to obtain the 2-amino-5-chlorobenzophenone. The method is suitable for the large-scaleproduction of the 2-amino-5-chlorobenzophenone.

The invention provides a filtering device allowing activated carbon to be replaced through an automatic program.The filtering device comprises an electroplating liquid tank feed pump connected with an electroplating liquid tank, an activated carbon treatment device, a secondary filter, an activated carbon discharge tank, an activated carbon replacing tank, an activated carbon conveying pump, an intelligent control system, a solenoid valve assembly and a pipeline assembly connected with the solenoid valve assembly, wherein the electroplating liquid tank feed pump, the activated carbon conveying pump and the solenoid valve assembly are connected with a control module in the intelligent control system, an activated carbon separator is arranged at the outlet end of the activated carbon treatment device, and the activated carbon treatment device is connected with a pressure display meter.A traditional activated carbon electroplating liquid filtering system is improved, the effect of automatically replacing the activated carbon is achieved, all equipment operation is automatically controlled basically, the filtering device is easy and convenient to use and high in treatment efficiency, the efficiency is remarkably improved compared with an existing scheme of cleaning a filter, and a great deal of pure water for cleaning the filter is saved.

The invention discloses an environmental-friendly method for preparing bromine-based alkyl. The method comprises the steps as follows: adding a hydrobromic acid solution in a reaction vessel in advance, and then preheating until steam is generated; and slowly adding the mixture of the hydrobromic acid solution and an ethanol solution into the reaction vessel or slowly adding both in a separated way at the same time, as for the former way, during the adding process, heating the reaction vessel to 100-140 DEG C to cause reaction so as to prepare bromine-based alkyl, wherein the ethanol solution is the normal butanol solution or the methanol solution; and bromine-based alkyl is bromobutane or bromomethane. According to the invention, poisonous and harmful raw materials are reduced from the source, which reduces potential safety hazards during production and ensures the occupational safety and health of staff. During the process, no waste gas is generated, no solid waste is discharged, and waste water can be recycled after being subjected to neutralization and desalting processing, as a result, zero discharge of 'the three wastes' is realized, and the purpose of environment protection is achieved. Therefore, the method has the advantages of low cost, simplicity in operation, and easiness in industrialization application.

The invention discloses a graphene hygienic disinfection wet tissue, which comprises a graphene spunlace non-woven fabric and a wet tissue liquid, and the wet tissue liquid comprises ultrapure water and isopropanol, wherein the ultrapure water accounts for 25%-60% of the weight of the wet tissue liquid, the isopropanol accounts for 40%-75% of the weight of the wet tissue liquid, and the viscose content of the graphene spunlace non-woven fabric is 10%-50%. According to the invention, because of strong permeability and sterilization and disinfection effects of isopropanol, the concentration of disinfection liquid can be reduced, a disinfectant does not need to be added, and the harm of chemical substances is avoided. The graphene has a sterilization effect, and three sterilization mechanismsof the graphene perform sterilization in a physical mode, so that the graphene has a very good sterilization effect on bacteria. The hygienic disinfection wet tissue does not contain irritant substances such as essence, does not have side effects on skin surface disinfection, has diverse uses, is convenient to carry and use, is rapid to volatilize without residues. The hygienic disinfection wet tissue of the invention has the advantages of simple production process, convenient operation and 99.9% of killing effect on Escherichia coli, Staphylococcus aureus, Candida albicans and the like.