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Novel acid recovery process for active carbon

A technology of activated carbon and acid recovery, applied in the field of activated carbon manufacturing, to achieve the effect of improving the operating environment, significant economic benefits, and small equipment footprint

Active Publication Date: 2011-01-26
NANPING YUANLI ACTIVE CARBON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the recovery effect of this process can meet the process requirements, the operation period is long, the operation steps are cumbersome, the labor intensity is high, and the equipment occupies a large area; and there is a large amount of disorganized phosphoric acid vapor, which is difficult to collect and the operating environment is extremely harsh

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The concentration of concentrated phosphoric acid used for the slurry preparation is 30 degrees Baume, and the consumption is: every 1 kg of phosphorus charcoal uses 1 kg of concentrated phosphoric acid.

[0032] The filter press adopts a chamber filter press.

[0033] The first-level washing liquid is an aqueous phosphoric acid solution of 20 degrees Baume, the first-level washing time is: 10 minutes, and the washing flow rate of the first-level washing liquid is: 3m 3 / h; the secondary washing liquid is an aqueous phosphoric acid solution of 10 degrees Baume, the secondary washing time is: 10 minutes, and the washing flow of the secondary washing liquid is: 3m 3 / h; the three-stage washing liquid is an aqueous phosphoric acid solution of 5 degrees Baume, the three-stage washing time is: 10 minutes, and the washing flow of the three-stage washing liquid is: 3m 3 / h; the fourth-level washing liquid is industrial water at 50°C, the fourth-level washing time is: 10 minut...

Embodiment 2

[0038] The concentration of concentrated phosphoric acid used for the slurry preparation is 35 degrees Baumé, and the consumption is: every 1 kg of phosphorus charcoal uses 3 kg of concentrated phosphoric acid.

[0039] The filter press adopts a chamber filter press.

[0040] The first-level washing liquid is an aqueous phosphoric acid solution of 30 degrees Baume, the first-level washing time is: 50 minutes, and the washing flow rate of the first-level washing liquid is: 10m 3 / h; the secondary washing liquid is an aqueous phosphoric acid solution of 20 degrees Baume, the secondary washing time is: 50 minutes, and the washing flow of the secondary washing liquid is: 10m 3 / h; the three-stage washing liquid is an aqueous phosphoric acid solution of 10 degrees Baume, the three-stage washing time is: 50 minutes, and the washing flow of the three-stage washing liquid is:, 10m 3 / h; the fourth-level washing liquid is industrial water at 70°C, the fourth-level washing time is 50 min...

Embodiment 3

[0045] The concentration of concentrated phosphoric acid used for the slurry preparation is 33 degrees Baumé, and the consumption is: every 1 kg of phosphorus charcoal uses 2 kg of concentrated phosphoric acid.

[0046] The filter press adopts a chamber filter press.

[0047] The first-level washing liquid is an aqueous phosphoric acid solution of 25 degrees Baume, the first-level washing time is: 30 minutes, and the washing flow rate of the first-level washing liquid is: 7m 3 / h; the secondary washing liquid is an aqueous phosphoric acid solution of 15 degrees Baume, the secondary washing time is: 30 minutes, and the washing flow of the secondary washing liquid is: 6m 3 / h; the three-stage washing liquid is an aqueous phosphoric acid solution of 7 degrees Baume, the three-stage washing time is: 30 minutes, and the washing flow of the three-stage washing liquid is: 7m 3 / h; the fourth-stage washing liquid is industrial water at 60°C, the washing time of the fourth-stage washi...

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Abstract

The invention provides a novel activated carbonate recovery process. High-temperature phosphoric carbon is cooled and then slurry preparation and pressure filtration are carried out; phosphoric acid with different concentrations and industrial water are utilized to carry out four times of cleaning and pressure filtration; and a washing solution can be recycled, a filter cake after pressure filtration is the semi-finished product of activated carbon of the reclaimed acid. The process replaces the original leaching technique, has good continuity, easy operation, small equipment floor area, highacid yield, low labor intensity, no acid vapor during the production process and obvious economic benefit, greatly improves the operation environment for personnel, recycles all materials, reduces treatment cost and is suitable for large scale popularization and application.

Description

technical field [0001] The invention belongs to the technical field of activated carbon manufacture, and more specifically relates to a novel activated carbon acid recovery process. Background technique [0002] Activated carbon is a type of microcrystalline carbon material made of carbonaceous materials with a black appearance, developed internal pore structure, large surface area, and strong adsorption capacity. Activated carbon can be divided into chemical activated carbon (chemical carbon) and physical activated carbon (physical carbon) according to the manufacturing method. In the traditional chemical carbon process, the acid recovery process is the leaching process, that is, different The semi-finished activated carbon is soaked in a concentrated acid solution to recover the phosphoric acid adsorbed in the phosphorus carbon. Although the recovery effect of this process can meet the process requirements, the operation period is long, the operation steps are cumbersome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08
Inventor 卢元健卢元强缪存标冯小旺
Owner NANPING YUANLI ACTIVE CARBON CO LTD