3results about How to "Short decolorization time" patented technology

The invention provides a method for decolorizing a waste PET textile in a regeneration process by using a hydrophobic deep-eutectic solvent. The method comprises the following steps: degrading a PET textile through a chemical method, blending the PET textile into a low-molecular solution, and extracting dye in the low-molecular solution through a hydrophobic deep-eutectic solvent, so as to obtain a decolorized polyester degradation product, namely bis (2-hydroxyethyl) terephthalate (BHET). The eutectic solvent used in the method can also be regenerated in a reverse extraction mode for recycling. Extraction decolorization is simple to operate and convenient to operate, and has certain advantages compared with other decolorization technologies.

A method for preparing white stable lignin and its application are disclosed. This invention addresses the limitations of existing lignin decolorization processes, which are constrained by long decolorization times and difficulty in maintaining color stability under ultraviolet light stimulation after decolorization, thus failing to meet the low absorption requirements of radiative cooling materials in the visible light band. The method includes: 1. Preparation of DES; 2. Preparation of lignin solution; 3. Modification of lignin; 4. Bleaching; 5. Preparation of white stable lignin. Application: It is used in the preparation of refrigeration materials.

The utility model discloses attapulgite clay decoloring treatment equipment which comprises a supporting seat, a mixing tank is fixedly mounted in the middle of the supporting seat, a servo motor is fixedly mounted at the top of the mixing tank, and a first stirring cutter group is fixedly connected to the transmission end of the servo motor. When oil enters the mixing tank, the oil firstly enters an inner cavity of an oil injection assembly, is guided by a drainage cavity and emerges from an oil conveying opening, clay is sprayed out from a clay input pipe in the same process, and a sun gear rotates to drive a planetary gear to rotate under the action of a first stirring cutter set; the second stirring cutter group starts to mix and stir a part of oil and clay, so that the clay can be fully mixed with a small amount of oil, and then the fully mixed oil is mixed with most of crude oil in the mixing tank, so that clay caking can be effectively avoided, the decoloring time of equipment is shortened, and the efficiency of the equipment is improved; and the practicability and the reliability of the equipment are realized.