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Solid base adsorption agent for treating processes of deacidification in use for liquid matter in esters of organic acid

A technology of organic acid and adsorbent, which is applied in the field of solid alkali adsorbent used in the deacidification and refining process of liquid organic acid esters, and can solve the problems of limited adsorption capacity, limited pore volume, and low dispersion of alkaline earth metals of the adsorbent

Inactive Publication Date: 2007-10-10
WEIFANG BAILI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: (1) the pore volume of the carrier is limited, the loading capacity of alkaline earth metals is limited, and the adsorption capacity of the prepared adsorbent is limited; (2) the water-soluble salt used for loading will cause air pollution during the roasting process
The disadvantages are: (1) the dispersion degree of alkaline earth metal is low, and the adsorption capacity is low; (2) the strength of the adsorbent is low, and it is difficult to be suitable for the application of large-scale industrial devices; (3) if the hydrochloride or nitrate of alkaline earth metal is used, Causes air pollution during roasting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: The preparation process of the described solid alkali adsorbent of the present invention.

[0010] Weigh metal oxides, metal hydroxides and macroporous pseudoboehmite powder in a certain proportion, add 2% kale powder, 8% ethylene glycol or ethylenediamine and a certain amount of 3% nitric acid The solution, after fully stirring and kneading for 2 hours, is extruded into a 1.6mm cylindrical strip on an extruder, then dried in an oven at 120°C for 12 hours, and finally roasted in a muffle furnace at 500°C for 3 hours to obtain a solid Alkali sorbent.

Embodiment 2

[0011] Example 2: The adsorption capacity and metal loss performance of solid alkali adsorbents with different active components are illustrated.

[0012] The method of Example 1 is used to prepare solid alkali adsorbents loaded with different metal oxides, 10ml of adsorbents are filled into a glass tube with an inner diameter of 1.0cm, and ethyl cyanoacetate (industrial product, purity 99.7%, acid Value 58 μ g / g, moisture content 0.019%), control flow velocity is 10ml / hr, table 1 is adsorption capacity (accumulative treatment capacity when the acid value of ethyl cyanoacetate<10 μ g / g after adsorption) and ethyl cyanoacetate after refining metal content.

[0013] Adsorbent

[0014] The data in Table 1 show that: from the perspective of processing capacity, MgO / γ-Al 2 o 3 and CaO / γ-Al 2 o 3 The solid alkali adsorbent has the largest treatment capacity; from the perspective of the metal content in the sample, the loss of MgO is lower than that of CaO. Therefore, ...

Embodiment 3

[0015] Example 3: Illustrate the effect and loss performance of alkali metals.

[0016] The preparation method of the adsorbent is the same as that of Example 1, except that the alkaline earth metal and alkali metal K are loaded at the same time, and the adsorption experiment method is completely the same as that of Example 2.

[0017] active ingredient

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MgO+K 2 o

CaO+K 2 o

MgO+K 2 o

CaO+K 2 o

Loading capacity, wt%

-

15% MgO

+3%K 2 o

15%CaO

+3%K 2 o

15% MgO

+1%K 2 o

25%CaO

+1%K 2 o

[0018] Processing capacity / ml

580

2200

3400

2660

2650

lost metal

Na

Mg

K

Ca

K

Mg

K

Mg

K

Loss amount μg / g

1.48

0.08

2.44

0.36

14.8

0.24

0.94

0.06

1.38

[0019] Table 2 data results show that addi...

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Abstract

An alkaline solid adsorbent for deacidifying and refining the liquid esters of organic acid is prepared from the oxide and hydroxide of alkali-earth in IIA family and alumina through wetting, mixing, kneading, extruding to become strips, drying and high-temp calcining. It has high specific surface area, adsorptive volume and mechanical strength.

Description

technical field [0001] The invention relates to a preparation method of a solid alkali adsorbent used in the adsorption and deacidification process of liquid organic ester substances and its application technology in the adsorption and deacidification process of liquid organic ester substances. This technology mainly uses at least one kind of oxides and hydroxides of IIA alkaline earth metals and aluminum oxide in the preparation of its solid alkali adsorbent solid, and in the presence of organic dispersants, pore expanders and inorganic acid binders. Prepared by wet kneading method. The prepared solid alkali adsorbent has moderate alkalinity, which avoids the side effect of the adsorption process (hydrolysis of ester); meanwhile, it has a larger specific surface area, larger pore volume and pore diameter, which ensures a higher adsorption capacity; It has high mechanical strength, which ensures its industrial performance. In addition, its extremely low metal loss also avoid...

Claims

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Application Information

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IPC IPC(8): B01J20/08C07C67/56
Inventor 王芳珠王勤柴永明刘洪亮郭希田
Owner WEIFANG BAILI CHEM
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