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Production method for barium stearate

A technology of barium stearate and production method, applied in chemical instruments and methods, carboxylate preparation, carboxylate preparation and other directions, can solve problems such as inability to overcome waste water discharge, and achieve the effects of reducing energy consumption and saving costs

Inactive Publication Date: 2014-04-02
GUANGZHOU VOCATIONAL COLLEGE OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is still unable to overcome the disadvantage of wastewater discharge

Method used

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  • Production method for barium stearate

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Experimental program
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Effect test

Embodiment 1

[0029] The production method of barium stearate described in this embodiment is carried out according to the following steps:

[0030] 1) In a 5000ml flask with heating, stirring and temperature measuring devices, add 1200ml of water to start stirring and heating;

[0031] 2) Under normal pressure, using water as the reaction dispersion medium, while stirring and heating, first add powdered barium hydroxide octahydrate (Ba(OH)) to the flask in step 1) 2 ·8H 2 O) 132.0g, stir evenly to form a barium hydroxide suspension; when the temperature reaches 58℃, add 222.2g of stearic acid while stirring, stearic acid is fine granular industrial stearic acid; when the temperature reaches At 66°C, the heating was stopped; the temperature was further increased due to the exotherm of the reaction, and the reaction was maintained at 70°C for 30 minutes; the reaction ended. The barium hydroxide octahydrate is powdered barium hydroxide octahydrate with an industrial-grade purity greater than 98%. ...

Embodiment 2

[0035] The production method of barium stearate described in this embodiment is carried out according to the following steps:

[0036] 1) In a 5000ml flask equipped with heating, stirring and temperature measuring devices, add 1200ml of the circulating mother liquor obtained in Example 1 and heat while stirring, and then start stirring and heating;

[0037] 2) Under normal pressure, with water as the reaction dispersion medium, while stirring and heating, first add 132.1g of powdered barium hydroxide octahydrate to the flask in step 1), and stir evenly to form a barium hydroxide suspension Turbid liquid; when the temperature reaches 56°C, add 222.05g of stearic acid while stirring. Stearic acid is a fine granular industrial grade stearic acid; when the temperature reaches 65°C, stop heating; due to the exothermic reaction The temperature rose further, maintained at 69°C, and reacted for 30 minutes; the reaction ended. The barium hydroxide octahydrate is powdered barium hydroxide o...

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Abstract

The invention discloses a production method for barium stearate. The production method comprises the following steps: 1) adding water into a reactor and starting stirring and heating; 2) with water as a reaction dispersion medium and under the conditions of stirring and heating, adding powdery barium hydroxide at normal pressure so as to form a barium hydroxide suspension, then adding subparticle stearic acid while stirring when temperature reaches 50 to 60 DEG C, stopping heating when temperature reaches 65 to 66 DEG C and carrying out a reaction for 20 to 30 min when temperature rises to 69 to 70 DEG C caused by reaction exotherm; and 3) subjecting a reaction product to filtering separation, drying and crushing so as to obtain a barium stearate product. The production method provided by the invention realizes a complete chemical reaction of stearic acid with barium hydroxide under the reaction condition that a catalyst is not added and has low requirements on equipment; process flow is simple; the reaction medium water can be cyclically used, so no waste water is discharged, causing no pollution to the environment; reaction temperature is low, and little energy is consumed; no catalyst is needed, and production cost is reduced.

Description

Technical field [0001] The invention relates to a method for producing barium stearate, and belongs to the technical field of metal soap preparation. Background technique [0002] Barium stearate is mainly used as a heat stabilizer and lubricant for polyethylene and polyvinyl chloride copolymers. It has excellent heat stability, lubricity and processability. It is used for PVC products such as transparent film, artificial leather, hard board and pipe. It can also be used as a high temperature release agent and a high temperature lubricant for machinery. [0003] At present, the method of producing barium stearate is mainly the traditional saponification metathesis method. The process is mature, but the water consumption is large, caustic soda is used, and the high-concentration salty wastewater discharges large amounts and pollutes the environment. Does not meet the current requirements for energy conservation, environmental protection and clean production. Another method is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C53/126
CPCC07C51/412C07C53/126
Inventor 邓志城
Owner GUANGZHOU VOCATIONAL COLLEGE OF SCI & TECH
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