35results about How to "Achieve high-value conversion" patented technology

The invention discloses mulberry and bamboo composite fibers obtained after graft modification of mulberry fibers and bamboo fibers in ionic liquid and a preparation method thereof. The preparation method includes the following steps that firstly, the mulberry fibers and the bamboo fibers are subjected to ultrasonic wave aided NaOH treatment and then dissolved in the ionic liquid for a constant temperature reaction, a mulberry fiber solution and a bamboo fiber solution are obtained, and finally the mulberry and bamboo composite fibers are prepared in the ionic liquid and are obtained. According to the preparation method, the ionic liquid is adopted as a solvent, mulberry twig and bamboo twig waste is converted into the high-value high-quality mulberry and bamboo composite fibers, and the method is environmentally friendly, simple, convenient to operate and high in preparation efficiency.

The invention discloses a synthesis method of imidazolinone derivatives. Using amidine compounds and polyols as raw materials, it catalyzes the high-value conversion of polyols into a series of imidazolinone derivatives through cobalt catalysts, and develops a novel, green, and sustainable chemical synthesis route. The high-value conversion of renewable resources is realized, thus meeting the demand for the synthesis of imidazolinone derivatives. This synthetic method has the advantages of wide substrate applicability, good functional group compatibility, and the use of reusable and cheap metal catalysts and air as the oxidant, and has the potential to prepare imidazolinone derivatives on a large scale in one step, and is also an important resource for biomass resources. Conversion into high-value functional molecules provides an important pathway.

The invention discloses a method for preparing biodiesel by directly using cellulose through mixed fermentation. The mixed fermentation is performed by using a plant fiber degrading strain and a grease producing strain, and ethanol is produced by directly using natural plant fiber such as straws. The method comprises the following steps of: designing a culture medium for the mixed fermentation by optimization methods such as a response surface method, and optimizing to obtain the fermentation conditions such as the optimum temperature of mixed fermentation, optimum mixing proportion of strains and optimum mixing time of the strains by utilizing the methods such as orthogonal test and response surface methodology; according to the optimized fermentation conditions, by using the plant fiber as a carbon source, degrading the cellulose into fermentable sugar by using a cellulase producing strain, and adding grease-producing microorganisms into the culture system for the mixed fermentation; and by using the sugar which is produced by the constant enzymolysis of the plant fiber as the carbon source, fermenting to produce grease by using the grease producing strain, and performing methyl esterification reaction of the microbial grease to obtain the biodiesel.

The invention discloses a preparation method of a mulberry twig bark fiber / silk fibroin multilayer composite membrane. The preparation method includes the steps of: 1) initial separation of mulberry twig bark fibers; 2) identification of content and purity of the mulberry twig bark fibers; 3) modification of the mulberry twig bark fibers; 4) grafting of the mulberry twig bark fibers; 5) productionof single-layer membranes; and 6) production of the multilayer membrane. The multilayer composite membrane not only solves a problem of single physical mixing during preparation of composite membranes in the prior art, has good water absorption and moisture retention effect, has good thermostability, is reduced in crystallization degree, and is improved in mechanical properties.

The invention discloses a preparation method of a mulberry fiber composite three-dimensional oil-water separation membrane, which belongs to the technical field of membranes and includes the following preparation steps: (1) preparing mulberry fiber; Enzyme partial treatment, ionic liquid mixed solution treatment; (3) Preparation of monolayer film: adding cross-linking reagent, hydrophobic reagent and initiator, drying and molding to obtain a formed hydrophobic and lipophilic monolayer film; (4) Three-dimensional multilayer film Preparation: According to application needs, the single-layer film is prepared into a multi-layer three-dimensional composite film by using an ionic liquid composite cross-linking agent. The beneficial effects of the invention are: providing a new way for the resource utilization of biomass waste. It has many advantages such as high efficiency and environmental friendliness, improves the spatial dimension and contact area of ​​the membrane, and solves the problem of poor mechanical properties during the use of the membrane.