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Preparation method of calcium naphthenate

A technology of calcium naphthenate and naphthenate, applied in the chemical industry, can solve the problems of unstable and easy precipitation of calcium, low calcium content in saturated solution, large loss of naphthenic acid in water, etc., so as to ensure the reaction kinetics strength, The preparation process is simple and the effect of increasing the contact surface

Pending Publication Date: 2022-01-07
DEQING XINGBANG RARE EARTH NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method uses calcium hydroxide saturated solution as the calcium source, and the chemical properties of calcium hydroxide are slightly soluble, and its saturated solution contains very low calcium content, which is unstable and easy to precipitate calcium. The saponification reaction process has a large amount of slag, slow reaction speed, and high output. The large amount of wastewater results in a large water-soluble loss of naphthenic acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of calcium naphthenate, the preparation method of calcium naphthenate comprises the following steps:

[0037] S1: Pulverize and classify calcium oxide to the nanometer level; pulverize and classify it until the average particle size is less than 1000 nanometers;

[0038] S2: adding deionized water to prepare nano-lime milk;

[0039] S3: adding an organic solvent to wash and evenly disperse the nanoscale lime emulsion mixture for use;

[0040] S4: Add naphthenic acid to the PP reaction tank, add an equal volume of deionized water, stir and raise the temperature to 50°C;

[0041] S5: add liquid caustic soda or ammonia water to carry out liquid-liquid phase saponification reaction, and obtain naphthenate after liquid separation;

[0042] S6: Add the nano-scale lime emulsion mixture to the naphthenate, carry out the metathesis reaction under the condition of stirring at a rotating speed of 200 rpm, control the stirring time for 10 minutes, filter and ...

Embodiment 2

[0049] A preparation method of calcium naphthenate, the preparation method of calcium naphthenate comprises the following steps:

[0050] S1: Pulverize and classify calcium oxide to the nanometer level; pulverize and classify it until the average particle size is less than 1000 nanometers;

[0051] S2: adding deionized water to prepare nano-lime milk;

[0052] S3: adding an organic solvent to wash and evenly disperse the nanoscale lime emulsion mixture for use;

[0053] S4: Add naphthenic acid to the PP reaction tank, add an equal volume of deionized water, stir and raise the temperature to 80°C;

[0054] S5: add liquid caustic soda or ammonia water to carry out liquid-liquid phase saponification reaction, and obtain naphthenate after liquid separation;

[0055] S6: Add the nano-scale lime milk mixture to the naphthenate, carry out the metathesis reaction under stirring at a rotating speed of 400 rpm, control the stirring time for 60 minutes, filter and remove the slag, and ...

Embodiment 3

[0062] A preparation method of calcium naphthenate, the preparation method of calcium naphthenate comprises the following steps:

[0063] S1: Pulverize and classify calcium oxide to the nanometer level; pulverize and classify it until the average particle size is less than 1000 nanometers;

[0064] S2: adding deionized water to prepare nano-lime milk;

[0065] S3: adding an organic solvent to wash and evenly disperse the nanoscale lime emulsion mixture for use;

[0066] S4: Add naphthenic acid to the PP reaction tank, add an equal volume of deionized water, stir and raise the temperature to 60°C;

[0067] S5: add liquid caustic soda or ammonia water to carry out liquid-liquid phase saponification reaction, and obtain naphthenate after liquid separation;

[0068] S6: Add the nano-scale lime milk mixture to the naphthenate, carry out the metathesis reaction under the condition of stirring at a rotating speed of 250 rpm, control the stirring time for 30 minutes, filter and remo...

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Abstract

The invention discloses a preparation method of calcium naphthenate, and relates to the technical field of chemical engineering. The preparation method of the calcium naphthenate comprises the following steps: crushing calcium oxide, and grading the crushed calcium oxide to nanoscale; adding deionized water to prepare nano lime milk; adding an organic solvent to wash and uniformly disperse the nano-scale lime milk mixed solution for later use; adding naphthenic acid into a PP reaction tank, adding deionized water with the same volume, stirring the mixture and conducting heating to 50-90 DEG C; adding liquid caustic soda or ammonia water to carry out liquid-liquid phase saponification reaction, and separating liquid to obtain naphthenate; and adding the nano-scale lime milk mixed solution into the naphthenate, carrying out double decomposition reaction under the stirring condition of 200-400rpm, controlling the stirring time to be 10-60 minutes, conducting filtering to remove slag, and conducting distilling to obtain the final product calcium naphthenate.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing calcium naphthenate. Background technique [0002] Calcium naphthenate is a semi-fluid water-insoluble organic compound traditionally used in coating resins, adhesives, smoke suppressants, etc. Calcium naphthenate is popularized and applied in the field of rare earth metallurgy. It has the advantages of high extraction rate of rare earth elements, good separation effect, and environmental protection. It can replace the existing extraction systems of sodium naphthenate and ammonium naphthenate. [0003] Rare earth is a non-renewable scarce strategic resource, an advantageous species in the country's foreign trade, and the material basis for the country's development of high-tech strategic emerging industries. Rare earth is the general term for fifteen conventional rare earth elements. Rare earth smelting and separation is to separate rare earth mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C61/00C07C51/48
CPCC07C51/412C07C51/48C07C61/005
Inventor 张江华李华畅郭秋松李恒华钟竞德
Owner DEQING XINGBANG RARE EARTH NEW MATERIALS
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