Cross-linked modified lignin chelating agent and preparation method thereof
A technology of cross-linking modified lignin, which is applied in the field of cross-linking modified lignin chelating agent and its preparation, to achieve the effect of wide source of raw materials and low cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0024] 1. According to the mass ratio of 1:5, stir and mix the lignin and 25% sodium hydroxide solution by mass concentration, and heat in a water bath at 65°C. Ethylene oxide with the same quality as the lignin was slowly added dropwise, the pH was adjusted to 7.0 with a 25% acetic acid solution, and the mixture was allowed to stand for precipitation for half an hour, after separation, washing, and drying, to obtain cross-linked lignin.
[0025] 2. Etherify the lignin, disperse lignin in ethanol, add NaOH with 8% lignin mass and 18% hydroxymethyl dimethylamine hydrochloride with lignin mass, and react at 50°C 5 hours, separate and dry for later use.
[0026] 3. Accurately weigh a certain amount of cross-linked etherified lignin to make 20% lignin milk, and stir evenly. Slowly add 0.2g / mL sodium hydroxide dropwise, then add carbon disulfide, and react in a water bath at 50°C for 2h. Take out and add 0.1g / mL magnesium sulfate solution, and continue to react for 15 minutes. Among ...
Embodiment 2
[0034] 1. According to the mass ratio of 1:5, stir and mix the lignin and 25% sodium hydroxide solution by mass concentration, and heat in a water bath at 65°C. Ethylene oxide with the same quality as the lignin was slowly added dropwise, the pH was adjusted to 7.0 with a 25% acetic acid solution, and the mixture was allowed to stand for precipitation for half an hour, after separation, washing, and drying, to obtain cross-linked lignin.
[0035] 2. Etherify the lignin, disperse lignin in ethanol, add NaOH with 8% lignin mass and 18% hydroxymethyl dimethylamine hydrochloride with lignin mass, and react at 50°C 5 hours, separate and dry for later use.
[0036] 3. Accurately weigh a certain amount of cross-linked etherified lignin to make 20% lignin milk, and stir evenly. Slowly add 0.2g / mL sodium hydroxide dropwise, then add carbon disulfide, and react in a water bath at 50°C for 2h. Take out and add 0.1g / mL magnesium sulfate solution, and continue to react for 15 minutes. Among ...
Embodiment 3
[0044] 1. According to the mass ratio of 1:5, stir and mix the lignin and 25% sodium hydroxide solution by mass concentration, and heat in a water bath at 65°C. Ethylene oxide with the same quality as the lignin was slowly added dropwise, the pH was adjusted to 7.0 with a 25% acetic acid solution, and the mixture was allowed to stand for precipitation for half an hour, after separation, washing, and drying, to obtain cross-linked lignin.
[0045] 2. Etherify the lignin, disperse lignin in ethanol, add NaOH with 8% lignin mass and 18% hydroxymethyl dimethylamine hydrochloride with lignin mass, and react at 50°C 5 hours, separate and dry for later use.
[0046] 3. Accurately weigh a certain amount of cross-linked etherified lignin to make 20% lignin milk, and stir evenly. Slowly add 0.2g / mL sodium hydroxide dropwise, then add carbon disulfide, and react in a water bath at 50°C for 2h. Take out and add 0.1g / mL magnesium sulfate solution, and continue to react for 15 minutes. Among ...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More