Humic acid composition and application thereof
US10059632B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2016 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Oct 21, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K17/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A humic acid composition includes fulvic acid, ulmic acid and black humic acid. Fulvic acid is in an amount ranging from 64% to 98 wt % based on a sum weight of fulvic acid, ulmic acid and black humic acid. The content of phenol hydroxyl groups is in a range from 0.76 mmol/g to 2.42 mmol/g in the humic acid composition. The humic acid composition contains a high content of fulvic acid with small molecular weight and a high content of active functional groups, and a high content of phenolic hydroxyl in the active groups. The humic acid composition can provide microbial organic source for soil directly, and improve the nutrient of crops and the soil environment in rhizosphere to promote the breeding of microorganism and delay the attenuation rate of soil microbes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.