Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing coal-based humic acid by virtue of hydrothermal method

A technology of humic acid and hydrothermal method, which is applied in the field of coal-based humic acid preparation by hydrothermal method, which can solve the problems of low extraction rate and loss of humic acid, and achieve the effects of improving production efficiency, increasing output and shortening reaction time

Inactive Publication Date: 2018-09-04
HENAN POLYTECHNIC UNIV
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional process of extracting humic acid from lignite is the alkali-dissolved acid analysis method. The lignite is first treated with lye, the humic acid is dissolved in the lye, and then settled through the acid solution. This method depends on the content of humic acid in the lignite raw material. And in the process of dissolution and sedimentation, humic acid will be lost, resulting in low extraction rate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing coal-based humic acid by virtue of hydrothermal method
  • Method for preparing coal-based humic acid by virtue of hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing coal-based humic acid by hydrothermal method, comprising the following steps:

[0017] S1, the lignite is pulverized, and the lignite powder with a particle size of 90 mesh is sieved and dried for subsequent use;

[0018] S2, the pretreatment of lignite: take the lignite powder 10g that step S1 obtains, join in the polyglutamic acid fermentation broth according to the ratio of lignite: polyglutamic acid fermentation broth=1g:9mL, the pH of polyglutamic acid fermentation broth = 6.3, the concentration of effective viable bacteria in the polyglutamic acid fermentation broth is 1 × 10 8 CFU / mL, magnetically stirred in a water bath at 37°C for 12 hours, then filtered, and the filtered lignite powder was washed with deionized water until the washing liquid was neutral, and dried for later use;

[0019] S3, weigh 5g of lignite powder obtained in step S3, add lignite powder and water to the reactor according to the ratio of lignite: water=1g:8mL, and th...

Embodiment 2

[0022] A method for preparing coal-based humic acid by hydrothermal method, comprising the following steps:

[0023] S1, the lignite is pulverized, and the lignite powder with a particle size of 130 mesh is sieved and dried for subsequent use;

[0024] S2, the pretreatment of lignite: take the lignite powder 10g that step S1 obtains, join in the polyglutamic acid fermentation broth according to the ratio of lignite: polyglutamic acid fermentation broth=1g:11mL, the pH of polyglutamic acid fermentation broth =6.6, the concentration of effective live bacteria in the polyglutamic acid fermentation broth is 1×10 10 CFU / mL, magnetically stirred in a water bath at 37°C for 24 hours, then filtered, and the filtered lignite powder was washed with deionized water until the washing liquid was neutral, and dried for later use;

[0025] S3, weigh 5g of lignite powder obtained in step S2, add lignite and N-hydroxyphthalimide to the reactor according to the ratio of lignite: water=1g: 10mL...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing coal-based humic acid by virtue of a hydrothermal method, belonging to the technical field of preparation of humic acid. The method comprises the following steps: adding crushed and sieved brown coal powder into polyglutamic acid fermenting liquid in a proportion of 1g to 9mL-11mL, and carrying out pretreatment; adding the pretreated brown coal and water into a reactor in a proportion of 1g to 8mL-10mL, and introducing oxygen at a reaction temperature of 90-110 DEG C for reaction; and finally, carrying out suction filtration on the reactants, anddrying, so as to obtain coal-based humic acid. According to the preparation method, the full components of the brown coal are oxidized for synthesizing humic acid, compared with an alkali dissolutionand acid precipitation method, the method has the advantages that the synthesis does not depend on inherent content of humic acid in the brown coal, and the conversion of C-H bonds to carboxyl or hydroxy can be realized through oxidation, so that the yield of humic acid is increased.

Description

technical field [0001] The invention belongs to the technical field of humic acid preparation, and in particular relates to a method for preparing coal-based humic acid by a hydrothermal method. Background technique [0002] Humic acid (HA for short) is the remains of animals and plants, mainly the remains of plants, a type of organic matter caused and accumulated by microbial decomposition and transformation, and a series of geochemical processes. It is a polymeric organic acid mainly composed of aromatics and various functional groups. It has good physiological activity and functions of absorption, complexation, and exchange. Humic acid is widely used as organic raw material. In the field of medical and health care, humic acid is an important raw material for the manufacture and synthesis of pharmaceuticals; humic acid is also an important raw material for agricultural fertilizers, and has unique important functions such as controlling nitrogen and storing carbon, reducin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00
CPCC08H6/00
Inventor 程敢张传祥路阳
Owner HENAN POLYTECHNIC UNIV