Method for preparing oil gas absorbing composite material

A composite material, oil and gas technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc.

Active Publication Date: 2012-03-28
溧阳常大技术转移中心有限公司
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  • Abstract
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Problems solved by technology

[0004] Chinese patent CN1171978A proposes a preparation method of silica gel-activated carbon composite adsorbent, the method uses coal gangue as the main raw material, then activates with alkali, and then undergoes acidification and formation The silica gel-activated carbon composite adsorbent is prepared through steps such as gelling, aging, and washing. The main disadvantages of this invention are: ①The composite adsorbent prepared by this method is not specially developed for oil and gas recovery; ②This method uses coal gangue as a raw material, Increased production costs, and the production process is more complicated

Method used

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  • Method for preparing oil gas absorbing composite material
  • Method for preparing oil gas absorbing composite material

Examples

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Effect test

Embodiment 1

[0021] (1) Weigh 5kg of rice husk, wash, dry, crush, immerse in a hydrochloric acid solution with a mass fraction of 3%, stir at room temperature for 5 hours, filter out the rice husk, wash with deionized water until neutral, and dry to obtain impurity-removed rice shell powder;

[0022] (2) Weigh 2 kg of impurity-removed rice husk powder, add 20 kg of NaOH solution with a molar concentration of 2 mol / L, place it in a high-pressure reactor, heat up to 200 ° C, and filter after 24 hours of heat preservation; the filtrate is set aside, and the filter residue is washed with deionized water To neutrality, desiliconized rice husk powder is obtained after drying;

[0023] (3) Weigh 0.2 kg of desiliconized rice husk powder, add 1 kg of H 3 PO 4 Solution, mixed evenly, impregnated for 48 hours; then placed in a nitrogen atmosphere, heated to 800 ° C, activated for 4 hours; cooled at room temperature, washed with deionized water until neutral, and dried to prepare rice husk activated...

Embodiment 2

[0027] (1) Weigh 8 kg of rice husk, wash, dry, crush, immerse in hydrochloric acid solution with a mass fraction of 8%, stir at room temperature for 2 hours, filter out the rice husk, wash with deionized water until neutral, and dry to obtain impurity-removed rice shell powder;

[0028] (2) Weigh 3kg of impurity-removed rice husk powder, add 10kg of NaOH solution with a molar concentration of 5mol / L, place it in a high-pressure reactor, heat up to 100°C, keep it warm for 12h, and filter; the filtrate is set aside, and the filter residue is washed with deionized water To neutrality, desiliconized rice husk powder is obtained after drying;

[0029] (3) Weigh 0.4 kg of desiliconized rice husk powder, add 1 kg of H 3 PO 4 The solution was mixed evenly and immersed for 24 hours; then placed in a nitrogen atmosphere, heated to 500 ° C, activated for 8 hours; cooled at room temperature, washed with deionized water until neutral, and dried to obtain rice husk activated carbon;

[0...

Embodiment 3

[0033] (1) Weigh 10kg of rice husk, wash, dry, crush, immerse in a hydrochloric acid solution with a mass fraction of 5%, stir at room temperature for 3 hours, filter out the rice husk, wash with deionized water until neutral, and dry to obtain impurity-removed rice shell powder;

[0034] (2) Weigh 4kg of impurity-removed rice husk powder, add 20kg of NaOH solution with a molar concentration of 4mol / L, place it in a high-pressure reactor, heat up to 150°C, keep it warm for 18h, and filter; the filtrate is set aside, and the filter residue is washed with deionized water To neutrality, desiliconized rice husk powder is obtained after drying;

[0035] (3) Weigh 0.9 kg of desiliconized rice husk powder, add 3 kg of H 3 PO 4 The solution was mixed evenly and immersed for 36 hours, then placed in a nitrogen atmosphere, heated to 700°C, and activated for 6 hours; cooled at room temperature, washed with deionized water until neutral, and dried to obtain rice husk activated carbon; ...

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Abstract

The invention belongs to the technical field of oil gas recovery and particularly relates to a method for preparing active carbon / silica gel oil gas absorbing composite material prepared by using rice husk. The rice husk is pickled and purified and the silicon component in the rice husk is dissolved out by using NaOH solution. The desiliconized rice husk is activated by H3PO4 into active carbon, the removed silicon is added with H2SO4 to prepare silicon gel, the prepared active carbon and silicon gel powder are crushed and formed, and the oil gas absorbing composite material is prepared by high-temperature calcining. The preparation method is simple, easy to implement and low in cost, and the prepared composite absorbing material has good absorbing effect on oil gas and can be regenerated easily.

Description

technical field [0001] The invention belongs to the technical field of oil and gas recovery, and specifically relates to a method for preparing an oil and gas adsorption composite material—activated carbon / silica gel—by using rice husks. Background technique [0002] Commonly used oil and gas recovery methods include absorption method, adsorption method, membrane separation method and condensation method, etc., and several methods are mostly used in industrial applications. The use of adsorbents to adsorb and separate oil and gas has always been a research focus at home and abroad. The comprehensive performance directly affects the recovery effect of oil and gas. The adsorbents commonly used in oil and gas recovery include activated carbon and its modified products (such as activated carbon fiber), silica gel and hydrophobic silica gel, molecular sieve zeolite, activated alumina, and composite adsorbents; currently, Composite (or mixed) adsorbents are mostly used in the rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
Inventor 黄维秋郑宗能
Owner 溧阳常大技术转移中心有限公司
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