摘要:
A method of preparing a low-molecular lignin derivative comprises the step of: preparing lignin by hydrolyzing lignocellulosic biomass with an acid; preparing a first mixture by mixing 100 parts by weight of the lignin and 500 parts or more by weight of a phenolic compound; preparing a second mixture by mixing the first mixture with a solvent including the hydrophobic polar solvent; and recovering a low-molecular lignin derivative from the second mixture.
摘要:
A rigid polyurethane foam which is a polymerization product of a composition including a concentrated acid hydrolytic lignin, a polyol, and an isocyanate, and a method of preparing the rigid polyurethane foam.
摘要:
A method of preparing a low-molecular lignin derivative comprises the step of: preparing lignin by hydrolyzing lignocellulosic biomass with an acid; preparing a first mixture by mixing 100 parts by weight of the lignin and 500 parts or more by weight of a phenolic compound; preparing a second mixture by mixing the first mixture with a solvent including the hydrophobic polar solvent; and recovering a low-molecular lignin derivative from the second mixture.
摘要:
The present invention relates to a method for producing polyhydroxyalkanoates (PHAs), and a cell crushing monitoring method, and provides a method for producing polyhydroxyalkanoates (PHAs), the method allowing the length and sphericity of cells or PHAs to be measured through three-dimensional image analysis using the difference in refractive index of cells or PHAs, so that the autolysis degree, feed status, or crushing degree of cells of PHAs is identified, and thus optimum crushing conditions are set and the stability of an impurity removal process, which is a back-end process of a crushing process, can be increased.