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Method for preparing solid acid catalyst

A technology of solid acid catalysts and sulfonating agents, which is applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems that catalysts cannot be reused, are not well utilized, and are prone to coking. Achieve the effect of increasing by-product income, large specific surface area, and simple and convenient operation

Inactive Publication Date: 2015-04-01
成都理想财富投资咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional biodiesel production process uses liquid acid-base as catalyst, which mainly has the following problems: a. A large amount of liquid acid is easy to produce coking; b. After the reaction is completed, it is necessary to add a large amount of alkali to neutralize the sulfuric acid; c. The residue after vacuum distillation has a lot of coke and glycerol is impure and difficult to recycle; d. Will produce a lot of acidic or high-salt wastewater; e. The catalyst cannot be reused and the cost is high
A large amount of pineapple pomace is discarded and not well utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of solid acid catalyst, comprising the following steps:

[0022] (1) Dry the pineapple residue until the water content is lower than 15%, and then crush it to 80 mesh;

[0023] (2) Stir the dried and pulverized pineapple pomace evenly with a mixture of phosphoric acid and sulfuric acid, and soak for 12 hours;

[0024] The mixed solution of phosphoric acid and sulfuric acid is formed by mixing 35% phosphoric acid and 98% sulfuric acid according to the volume ratio of 8:1; the mixed volume ratio of the pineapple residue and the mixed solution is 1:1.5;

[0025] (3) Carbonize the soaked pineapple pomace at 300°C for 45 minutes, then raise the temperature to 500°C for activation for 10 minutes;

[0026] (4) Wash the activated pineapple residue with distilled water until the pH value is 6~7, and then dry it to obtain activated carbon of pineapple residue;

[0027] (5) Sulfonate activated charcoal with pineapple residue at 150°C for 10 hours with su...

Embodiment 2

[0030] A preparation method of solid acid catalyst, comprising the following steps:

[0031] (1) Dry the pineapple pomace until the water content is lower than 15%, and then crush it to 100 mesh;

[0032] (2) Stir the dried and pulverized pineapple pomace evenly with a mixture of phosphoric acid and sulfuric acid, and soak for 10 hours;

[0033] The mixed solution of phosphoric acid and sulfuric acid is formed by mixing 35% phosphoric acid and 98% sulfuric acid according to the volume ratio of 8:1; the mixed volume ratio of the pineapple pomace and the mixed solution is 1:2;

[0034] (3) Carbonize the soaked pineapple pomace at 300°C for 60 minutes, then raise the temperature to 450°C for activation for 10 minutes;

[0035] (4) Wash the activated pineapple residue with distilled water until the pH value is 6~7, and then dry it to obtain activated carbon of pineapple residue;

[0036] (5) Sulfonate the pineapple residue activated carbon with concentrated sulfuric acid at ...

Embodiment 3

[0039] A preparation method of solid acid catalyst, comprising the following steps:

[0040] (1) Dry the pineapple pomace until the water content is lower than 15%, and then crush it to 100 mesh;

[0041] (2) Stir the dried and pulverized pineapple pomace evenly with a mixture of phosphoric acid and sulfuric acid, and soak for 11 hours;

[0042] The mixed solution of phosphoric acid and sulfuric acid is formed by mixing 35% phosphoric acid and 98% sulfuric acid according to the volume ratio of 8:1; the mixed volume ratio of the pineapple residue and the mixed solution is 1:1.8;

[0043] (3) Carbonize the soaked pineapple pomace at 300°C for 50 minutes, then raise the temperature to 480°C for activation for 12 minutes;

[0044] (4) Wash the activated pineapple residue with distilled water until the pH value is 6~7, and then dry it to obtain activated carbon of pineapple residue;

[0045] (5) Sulfonate activated charcoal with pineapple residue at 150~200°C for 8 hours with...

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Abstract

The invention relates to a method for preparing a solid acid catalyst. The method comprises the steps of preparing active carbon by using pineapple residues and preparing the solid acid catalyst by using the prepared active carbon. The solid acid catalyst prepared according to the method can replace the conventional liquid acid catalyst to be used in the esterification reaction of fatty acid and short-chain alcohol and no acidy waste water is produced; and the solid acid catalyst can be recycled, and can be reused through acid regeneration after being used for a plurality of times.

Description

technical field [0001] The invention belongs to a preparation method of a catalyst, in particular to a preparation method of a solid acid catalyst. Background technique [0002] Biodiesel is a kind of biomass energy. Compared with petrochemical diesel, it does not contain sulfur and aromatics, has high cetane number, can be biodegraded, and is less harmful to the environment. It has a high flash point and is very safe for storage, use, and transportation, so it has become one of the most popular alternative energy sources for petroleum. [0003] The traditional biodiesel production process uses liquid acid-base as catalyst, which mainly has the following problems: a. A large amount of liquid acid is easy to produce coking; b. After the reaction is completed, it is necessary to add a large amount of alkali to neutralize the sulfuric acid; c. The residue after vacuum distillation has a lot of coke and glycerol is impure and difficult to recycle; d. Will produce a lot of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02B01J32/00C01B31/12
CPCY02P20/584
Inventor 武守阳
Owner 成都理想财富投资咨询有限公司
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