46results about How to "Handling process safety" patented technology

The invention discloses a process for treating chlorpyrifos pesticide wastewater, which comprises the process steps of acid analysis, complex extraction, Fenton oxidation, catalytic oxidation and the like. The present invention selects chlorpyrifos wastewater and the herbicide pendimethalin wastewater for mixed treatment, achieves waste treatment with waste, reduces the load of refractory organic pollutants in waste water, improves the biodegradability of waste water, and removes pollutants in waste water, For the purpose of improving the biodegradability of wastewater, the process is safe, advanced, clean and has low wastewater treatment cost.

The invention belongs to the technical field of automobile accessories and provides an automobile decorative sheet layer structure and the layer structure processing technology of the automobile decorative sheet layer. The automobile decorative sheet layer structure structurally comprises a non-woven layer, an aluminum part layer, a beech layer, a fiberboard layer and a walnut layer from inside to outside. The fiberboard layer is formed by wood fibers, a bonding formula, a flame-retarding formula and a waterproof formula. According to the processing technology, firstly, electrolytic oxidation is performed on the surface of the aluminum part layer, wax removing is performed before electrolytic oxidation, and a mixture of the flame-retarding formula, a gluing formula and the bonding formula is sprayed on the wood fibers which undergo hot grinding, and the fiberboard layer is formed through the procedures of drying, paving, hot pressing and sanding. The automobile decorative sheet layer structure and the layer structure processing technology of the automobile decorative sheet layer have the advantages that the technology processing process is green and safe and protects the environment; all the technology procedures are simple, therefore, yield is improved, a qualification rate is improved, production cost is reduced, and maintenance is easy; the layer structure after being processed is reasonable in layout, beautiful in appearance, and good in corrosion resistance, and the defects such as cracking and rusting are overcome; meanwhile, a high-quality film layer is formed on the outer surface of the layer structure, and therefore the corrosion resistance performance is enhanced.

The invention discloses a preparation method of an enzymatic grafting based antioxidant silk fibroin membrane, and belongs to the biological technical field of textiles. With the help of tyrosinase, antioxidant flavonoids compounds are grafted onto silk fibroin surface after catalytic oxidation; and by crosslinking of tyrosine and the flavonoids compounds in the enzymatic silk fibroin, the antioxidant properties of the silk fibroin membrane is enhanced. The specific processes include silk fibroin solution preparation, silk fibroin membrane preparation, grafting of the flavonoids compounds on the enzymatic silk fibroin and after treatment of the modified silk fibroin membrane. The silk fibroin membrane prepared by the preparation method has improved antioxidant and antimicrobial properties, and the membrane material mechanical properties also are improved. Compared with a silk fibroin membrane modification method based on chemical crosslinking, the enzymatic modification method is low in energy consumption, high in efficiency, less in pollution and in favour of environmental protection.

The invention discloses a method for immobilizing catalase with an enzymatic silk fibroin film, belongs to the field of textile biotechnology, aims to provide an environmental-friendly method for immobilizing catalase with the silk fibroin film, and expands the application of an enzymatic silk fibroin film material serving as a biosensor. Due to the catalytic oxidation function of tyrosinase, the silk fibroin film is grafted with catalase, so that not only is the immobilization between enzyme molecules and silk fibroin realized, but also the application performance of the silk fibroin film serving as a catalase carrier is improved. The method particularly comprises the technological processes such as preparation of a silk fibroin solution and the silk fibroin film, grafting enzymatic silk fibroin with catalase, washing with water, and carrying out aftertreatment. The enzymatic silk fibroin film prepared by the invention is used with a dissolved oxygen meter in a combined manner, so as to not only evaluate catalase contents in different systems, but also ensure repeated circulatory use; the properties of strength, elasticity and the like of the silk fibroin film are improved.

The invention discloses a method for carrying out real silk fabric anti-crease and antibacterial finishing by virtue of a laccase-TEMPO process. Quinones active groups are generated through catalyzing tyrosine residual groups in real silks by laccase so that chitosan molecules are grafted on the real silks; then 2,2,6,6-tetramethylpiperidine-nitrogen oxide (TEMPO) is added and is used for catalyzing chitosan and tyrosine in the real silks to generate formyl groups, so that the grafting amount and bonding firmness of the chitosan on the real silks are increased, and the real silk fabric anti-crease and antibacterial finishing is realized. The method comprises the following specific steps of: (1) catalytically oxidizing the tyrosine residual groups in the real silks by the laccase; (2) taking the chitosan and the quinones active groups in the real silks to react; (3) catalyzing the real silks by laccase-TEMPO to graft the chitosan; and (4) washing the real silks with water and then treating. Compared with traditional chemical cross-linking-process vacuum fabric anti-crease and antibacterial finishing, the method has the advantages that the grafting efficiency of the chitosan is high, enzyme treatment conditions are moderate, the real silk fabric anti-crease and antibacterial effect is relatively good and the strength of the fabric is improved.

The invention discloses a technique for treating pesticide wastewater containing phosphorus. The technique for treating the pesticide wastewater containing the phosphorus comprises the technical processes of multiple-effect evaporation, neutralization, flocculent setting, biological treatment, advanced oxidation of ozone and the like, novel densely-supporting padding is arranged in the biological process, and thus the treatment effect at the biological stage is improved. According to the technology, glyphosate mother liquor wastewater, mother liquor from amination and condensed washing secondary wastewater are mixed to treat waste and reduce the load of all organic pollutants in the wastewater. The B / C ratio of the wastewater difficult to degrade is increased, the technique is safe and advanced, operation is stable, operating cost is low, and maintenance is easy.

The invention discloses a fibroin based water absorbing material preparation method based on coupling and enzymatic graft copolymerization and belongs to the technical field of textile chemistry. According to the method disclosed by the invention, diazo salt is prepared by diazotization of arylamine containing vinyl, then the diazo salt generates coupling reaction with fibroin, and finally enzymatic fibroin and hydrophilic vinyl monomer generate graft copolymerization to improve hydrophilia of a fibroin material. The preparation method comprises the following specific technologies and steps: (1) fibroin solution preparation; (2) preparation of diazo salt containing vinyl; (3) fibroin coupling reaction; (4) graft copolymerization between the enzymatic fibroin and hydrophilic vinyl monomer;(5) fibroin based water absorbing material formation. Compared with introducing vinyl monomer on fibroin through a chemical crosslinking method and then utilizing persulfate or chemical methods of anultraviolet radiation method and the like to trigger the graft copolymerization between the fibroin and the hydrophilic vinyl monomer, the preparation method disclosed by the invention has the advantages of high graft copolymerization efficiency and moderate enzyme treatment conditions; furthermore, the fibroin based water absorbing material has the advantage of good water absorption.