A kind of preparation method of carbon molecular sieve

A carbon molecular sieve and particle technology, which is applied in the field of molecular sieve preparation, can solve the problems of pore-adjusting agent residual pollution, uneven pores, etc., and achieve the effects of increasing agricultural income, fine and uniform pores, and expanding the scope of application

Active Publication Date: 2018-03-23
桐乡市腾飞家纺股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is widely applicable, but there are problems such as uneven pores and residual pollution of pore-adjusting agents.

Method used

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  • A kind of preparation method of carbon molecular sieve
  • A kind of preparation method of carbon molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Grind 70g of walnut shells and 30g of chestnut shells, dry them until the weight deviation of 3 weighings does not exceed 0.1g, and obtain powdered shell materials a with a particle size of 3 μm, dry distillation and ball milling of 25g of polyvinylidene chloride resin Obtain powdery polyvinylidene chloride resin b with a particle size of 3 μm;

[0033] Stir a, b, 9g tar, 0.4PVA, 0.6g starch and 22.5g water evenly, put them into a hydraulic press and extrude to obtain cylindrical particles with an average diameter of 1.5mm and an average length of 4mm, then place the cylindrical particles In a drying oven, dry at 200°C for 1.5h to obtain dry cylindrical particles c. Put the dried cylindrical particles c into a horizontal converter and raise the temperature under the protection of nitrogen. The heating rate is set at 11°C / min, and the temperature is raised to After 450°C, set the heating rate to 5°C / min, raise the temperature to 700°C, and keep the temperature constant f...

Embodiment 2

[0036] Grind 70g of walnut shells and 30g of chestnut shells, dry them until the weight deviation of 3 weighings does not exceed 0.1g, and obtain shell powder raw material a with a particle size of 3 μm, dry distillation and ball milling of 25g of polyvinylidene chloride resin Obtaining polyvinylidene chloride resin powder raw material b with a particle size of 3 μm;

[0037] Stir a, b, 8.5g tar, 0.5PVA, 1.0g starch and 22.5g water evenly, put them into a hydraulic press and extrude to obtain cylindrical particles with an average particle diameter of 2mm and an average length of 3.8mm, and then the cylindrical particles Place in a drying oven and dry at 230°C for 2 hours to obtain dry cylindrical particles c. Put the dried cylindrical particles c into a horizontal converter and raise the temperature under the protection of nitrogen. The heating rate is set at 11°C / min, and the temperature is raised to After 450°C, set the heating rate to 5°C / min, raise the temperature to 680°C...

Embodiment 3

[0040] Grind 70g of walnut shells and 30g of chestnut shells, dry them until the weight deviation of 3 weighings does not exceed 0.1g, and obtain shell powder raw material a with a particle size of 3 μm, dry distillation and ball milling of 25g of polyvinylidene chloride resin Obtaining polyvinylidene chloride resin powder raw material b with a particle size of 3 μm;

[0041]Stir a, b, 9.5g tar, 0.3PVA, 0.2g starch and 22.5g water evenly, put them into a hydraulic press and extrude to obtain cylindrical particles with an average particle diameter of 1.5mm and an average length of 4.5mm, and then cylindrical The particles were placed in a drying oven and dried at 250°C for 1.5 hours to obtain dry cylindrical particles c. Put the dried cylindrical particles c into a horizontal converter and raise the temperature under the protection of nitrogen. The heating rate was set at 11°C / min. After raising the temperature to 450°C, set the heating rate to 5°C / min, raise the temperature to...

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Abstract

The invention provides a preparation method of a carbon molecular sieve, which comprises the following steps: by using agricultural waste nutshell, chestnut shell and a polyvinyl chloride resin as raw materials, preparing raw material powder, forming, carbonizing, and carrying out carbon deposition and the like. Especially in the carbon deposition process, a supercritical carbon dioxide reaction kettle is adopted, so that the reaction can be performed uniformly and thoroughly. The obtained carbon molecular sieve has fine and uniform pores; the produced nitrogen concentration reaches 99.6 vol% (the N2 flow rate is 40 ml / minute during testing); the strength of the carbon molecular sieve determined by the rotating drum reaches 99.9%; the properties of the product are greatly enhanced; and the overall reaction process is combined, thereby saving the energy by 40%.

Description

technical field [0001] The invention relates to the field of molecular sieve preparation, more specifically, to a method for preparing a carbon molecular sieve. Background technique [0002] Carbon molecular sieves (carbon molecular sieves, CMS) is a new green adsorbent, is the preferred pressure swing adsorption (referred to as P.S.A) air separation nitrogen-rich adsorbent in the engineering field, widely used in chemical industry, oil and gas industry, electronics industry, food Industry, coal industry, pharmaceutical industry, cable industry, metal heat treatment, transportation and storage and other fields. [0003] At present, there are three methods for preparing carbon molecular sieves: carbonization method, gas activation method and carbon deposition method. Carbonization method is the most basic preparation method. Carbon molecular sieves, but this method has high requirements on raw materials and is only suitable for high volatile raw materials, with extremely hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/306B01D53/047C01B21/04
CPCB01D53/047B01D2253/116B01D2257/40C01B21/0461C01B2210/0017C01P2004/03Y02P20/10Y02P20/54
Inventor 刘丽蓉
Owner 桐乡市腾飞家纺股份有限公司
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