5 results about "Methyl lactate" patented technology

This invention discloses a green synthesis method for acid-base bifunctional molecular sieves and its application. The method constructs acid-base sites in a one-step synthesis, yielding a molecular sieve catalyst containing acid-base bifunctional sites. This molecular sieve exhibits high activity and stable performance, and can be used as a catalyst to catalyze the isomerization of glucose to fructose. It significantly improves conversion efficiency in reactions catalyzing the isomerization of high-concentration glucose to fructose or its conversion to methyl lactate. Furthermore, this synthesis method avoids the use of environmentally harmful fluorinated mineralizers and inorganic acids, solving the problems of complex, time-consuming, and environmentally unfriendly synthesis processes of existing acid-base bifunctional molecular sieves. It also addresses the issues of low reaction efficiency and low selectivity of existing catalysts in reactions catalyzing the conversion of high-concentration glucose.

The application discloses a method for recovering lactic acid methyl ester by catalytic depolymerization of polylactic acid in one pot. The method comprises the following steps: mixing polylactic acid, amine nitrogen ligand and methanol, dissolving by adding a solvent, and then adding a n-butyllithium solution to carry out a depolymerization reaction; and after the reaction is completed, the solvent is removed by vacuum distillation, and the crude product is dried in vacuum to obtain lactic acid methyl ester product. The application does not need to synthesize a complex organic metal catalyst, the depolymerization condition is mild, and the generation of by-products such as low-molecular-weight oligomers is effectively reduced. Therefore, the application has the advantages of simplifying the catalyst preparation process, improving the depolymerization efficiency, reducing the cost and the like, and is suitable for industrialized recovery and cyclic utilization of polylactic acid.

Janus dry facial mask based on birch emulsion electrospinning and its preparation method belong to the field of beauty and skin care materials technology. This invention first utilizes green bio-based solvents ethyl lactate or methyl lactate to optimize the extraction of betulinol from birch bark using an ultrasound-assisted method. Then, employing emulsion electrospinning technology and a Janus bilayer structure design, an asymmetric bilayer dry facial mask is constructed: the hydrophobic layer is made of biodegradable polylactic acid electrospinned, acting as a water-locking barrier to delay moisture loss; the hydrophilic layer is made by uniformly dispersing birch bark ethyl lactate extract (oil phase) in a mixed aqueous solution of polyvinyl alcohol and chitosan through high-speed shear emulsification to form a stable O / W type emulsion, followed by electrospinning to create a nanofiber membrane encapsulating active ingredients. The Janus dry facial mask exhibits excellent moisturizing, antioxidant, and anti-inflammatory effects, and requires no preservatives for dry storage and transportation. The process is simple and suitable for industrial production.

The application discloses a method for synthesizing methyl lactate by catalyzing selective oxidation esterification of 1,2-propanediol, which comprises the following steps: contacting oxygen, 1,2-propanediol and a catalyst in a reactor, and reacting to obtain methyl lactate; the catalyst is composed of a metal oxide carrier and gold elements loaded on the surface of the metal oxide carrier; in the catalyst, the mass of the gold elements is 0.1-2 wt% of the mass of the metal oxide carrier; and the metal oxide carrier is at least one selected from SiO2, ZnO, gamma-Al2O3, TiO2, CeO2, MgO and Sm2O3.

This invention belongs to the technical field of functional foods and chemically modified materials, specifically relating to a dual-modified dietary fiber-based sugar-controlling health food and its preparation method. Using bamboo cellulose powder as a matrix, a multifunctional composite fiber structure is formed through a dual modification reaction of genipin aldehyde and lactic anhydride esterification. Betaine, generated by the condensation of methyl lactate and ethanolamine, is introduced as an organic small molecule coordinating component. Under optimized proportions and process conditions, this system forms a stable composite structure, significantly improving water absorption and swelling properties, structural stability, and glucose diffusion inhibition ability. The resulting powder particles are uniform, have good flowability, and exhibit excellent sugar-controlling performance and processing adaptability, making it suitable for the development of functional foods and nutritional regulation products.