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

A kind of method that prepares activated carbon to co-produce calcium chloride

A technology for preparing activated carbon and calcium chloride, which is applied in the direction of calcium/strontium/barium chloride, calcium/strontium/barium halide, etc., can solve the problems of preparing activated carbon, achieve less environmental pollution, save operating time, and economic benefits high effect

Active Publication Date: 2016-02-03
SHANDONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, crab shell chitin and its derivatives are mainly used in cosmetics, membrane materials and biological carriers. There is no report on the preparation of activated carbon from waste such as crab shells as raw materials.

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
  • A kind of method that prepares activated carbon to co-produce calcium chloride
  • A kind of method that prepares activated carbon to co-produce calcium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing activated carbon for co-production of calcium chloride, the steps are as follows:

[0029] (1) Raw material pretreatment: naturally dry the crab shells, pulverize them into powder, and pass through a 100-mesh sieve to obtain crab shell powder for subsequent use;

[0030] (2) Acidification treatment of raw materials: 800 mL of hydrochloric acid with a concentration of 4 wt% was added to 100 g of the crab shell powder obtained in step (1), stirred evenly, soaked for 6 hours to obtain a leachate;

[0031] (3) Preparation of calcium chloride: add milk of lime to the leachate obtained in step (2), adjust the pH to 9 of the solution, filter, heat, evaporate and dehydrate the filtrate at 270° C., cool and crystallize to obtain the calcium chloride product; add After milk of lime, iron and magnesium salts are precipitated in the form of hydroxides;

[0032] (4) Preparation of activated carbon: the solid residue obtained in step (2) was cleaned to pH 7 wi...

Embodiment 2

[0037] A method for preparing activated carbon for co-production of calcium chloride, the steps are as follows:

[0038] (1) Raw material pretreatment: dry the shrimp shells naturally, crush them into powder, and pass through a 200-mesh sieve to obtain shrimp shell powder, which is set aside;

[0039] (2) Acidification treatment of raw materials: 400mL of hydrochloric acid with a concentration of 3wt% was added to 100g of the shrimp shell powder obtained in step (1), stirred evenly, soaked for 2.0h to obtain a leachate;

[0040] (3) Preparation of calcium chloride: add milk of lime to the leachate obtained in step (2), adjust the pH to 9 of the solution, filter, heat the filtrate to evaporate and dehydrate at 300°C, cool and crystallize to obtain the calcium chloride product; add After milk of lime, iron and magnesium salts are precipitated in the form of hydroxides;

[0041] (4) Preparation of activated carbon: the solid residue obtained in step (2) was cleaned to pH 7 with ...

Embodiment 3

[0043] A method for preparing activated carbon for co-production of calcium chloride, the steps are as follows:

[0044] (1) Raw material pretreatment: dry the oyster shells naturally, pulverize them into powder, pass through a 40-mesh sieve to obtain oyster shell powder, and set aside;

[0045] (2) Acidification treatment of raw materials: adding 300 mL of hydrochloric acid with a concentration of 5 wt % to 100 g of the oyster shell powder obtained in step (1), stirring evenly, soaking for 4 hours to obtain a leachate;

[0046](3) Preparation of calcium chloride: add milk of lime to the leachate obtained in step (2), adjust the pH to 9 of the solution, filter, heat the filtrate to evaporate and dehydrate at 260° C., cool and crystallize to obtain the calcium chloride product; add After milk of lime, iron and magnesium salts are precipitated in the form of hydroxides;

[0047] (4) Preparation of activated carbon: wash the solid residue obtained in step (2) to pH 7 with deioni...

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

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing active carbon co-producing calcium chloride, which comprises the following steps of (1) raw material pretreatment, (2) raw material acidification, (3) filtrate evaporation and condensation, and (4) residue carbonization and activation. According to the method, active carbon and calcium chloride are prepared by taking shell aquatic waste as a raw material; the method is sufficient in raw material, low in price, low in production cost and simple in preparation technology; a prepared active carbon product has the advantages of high specific surface area, stable physical and chemical property and excellent adsorption property; and the method has a broad market prospect and an environmental benefit, and provides a good prospect for high value transformation application of the shell aquatic waste.

Description

technical field [0001] The invention relates to a method for preparing activated carbon with a high specific surface area, which simultaneously produces calcium chloride as a by-product, and belongs to the technical field of chemical production. Background technique [0002] As a traditional and novel carbon material, activated carbon has the characteristics of large specific surface area, good electrical conductivity, good chemical stability, good regeneration performance, large adsorption capacity and insoluble in most solvents, so it has been widely used in the chemical industry , gas enrichment and separation, electrode materials for supercapacitors, drug refining, and military chemical protection and other fields. At present, the raw materials for preparing activated carbon are mainly coal and wood. In recent years, with the growth of the global economy, coal resources have been continuously developed and utilized, and a series of problems such as environmental pollutio...

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 Patents(China)
IPC IPC(8): C01F11/24C01B31/12
Inventor 岳钦艳高原高宝玉孙媛媛黄德毅阚渝姣
Owner SHANDONG UNIV