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Method for preparing gas phase absorption activated carbon from pine nut shells

A technology of pine nut shells and activated carbon, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, which can solve the problems of poor product quality, high oil content, and environmental pollution, and achieve the effect of moderate specific gravity and hard texture

Inactive Publication Date: 2010-07-21
胡志杰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology uses pine nuts instead of expensive materials like charcoal or bone powder used traditionally in making porous carbons. It produces highly pure products with low density without harming our natural resources.

Problems solved by technology

This patented technical solution described involves producing activated carbons from various sources such as wood or coal products without excessive waste material. However, current methods have limitations: they require expensive equipment (pumping) and are limited in their ability to create pores structures within certain sizes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing gas-phase adsorption activated carbon with pine nut shells, is characterized in that it comprises the steps:

[0017] (1) Selection: Screen pine nut shells, and select pine nut shells without mildew as raw materials;

[0018] (2) Crushing: crush the raw material to 2-4mm with a double-roller crusher;

[0019] (3) Distillation: Put the qualified raw materials into the distillation pot and distill with water vapor and atmospheric pressure for 3 to 4 hours, and collect the pine oil with a condensing device;

[0020] (4) Drying: Put the distilled raw materials into the rotary kiln and dry until the moisture is less than 10%;

[0021] (5) Impregnation of raw materials: According to the mass ratio of raw materials and solution of 1:2 to 1:3, the raw materials are immersed in phosphoric acid solution of 38 to 42 degrees Baume at 70 to 80 °C for 12 to 16 hours;

[0022] (6) Carbonization and activation: Put the impregnated raw materials into a rotary fu...

Embodiment 2

[0028] (1), screening pine nut shells;

[0029] (2), broken pine nut shell to 2 ~ 4mm;

[0030] (3) Steam distilled pine nut shells for 3 hours to collect pine oil;

[0031] (4), drying;

[0032] (5) Raw material impregnation: prepare phosphoric acid into a solution of 38 degrees Baume, and impregnate the raw material at 70°C for 12 hours according to the mass ratio of raw material to solution of 1:2;

[0033] (6) Carbonization and activation at 450°C for 2 hours;

[0034] (7), recovery of phosphoric acid;

[0035] (8), remove metal ions;

[0036] (9), drying and crushing into products.

[0037] Pine nut hull activated carbon yield: ≥32.2%, formaldehyde removal rate: ﹥86.00%, benzene removal rate: ﹥91.00%, carbon tetrachloride adsorption capacity: ﹥90.00%, methylene blue adsorption value: 175.6ml / g, pine oil yield: ≥8.2%.

Embodiment 3

[0039] (1), screening pine nut shells;

[0040] (2), broken pine nut shell to 2 ~ 4mm;

[0041] (3) Steam distilled pine nut shells for 4 hours to collect pine oil;

[0042] (4), drying;

[0043] (5) Raw material impregnation: prepare phosphoric acid into a solution of 40 degrees Baume, and impregnate the raw material at 80°C for 16 hours according to the mass ratio of raw material to solution of 1:3;

[0044] (6) Carbonization and activation at 550°C for 3 hours;

[0045] (7), recovery of phosphoric acid;

[0046] (8), remove metal ions;

[0047] (9), drying and crushing into products.

[0048] Pine nut shell activated carbon yield: ≥29.00%, formaldehyde removal rate: ﹥88.00%, benzene removal rate: ﹥93.00%, carbon tetrachloride adsorption capacity: ﹥105.00%, methylene blue adsorption value: 185.6ml / g, pine oil yield: ≥9.3%.

[0049] When the steam distillation of pine nut shell is more than 4 hours, the soaking time is more than 16 hours, the carbonization activation ...

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Abstract

The invention discloses a method for preparing gas phase absorption activated carbon from pine nut shells, and relates to the technical field of preparation of activated carbon. The method of the invention comprises the following steps: (1) selecting; (2) breaking; (3) distilling; (4) drying; (5) soaking raw materials; (6) charring and activating; (7) recovering phosphoric acid; (8) removing metal ions; and (9) drying and breaking. Because the pine nut shells are a good raw material for preparing the gas phase absorption activated carbon and have not only hard texture but also moderate specific gravity, the method of the invention overcomes the defects of a traditional method, can produce the high-quality qualified activated carbon for gas phase absorption, can not pollute the environment, simultaneously can obtain a by-product pine oil, and is a new production process which economic, green and environment-friendly.

Description

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Claims

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Application Information

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Owner 胡志杰
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