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Method for double decomposition method production of stearate and recycle of produced waste water

A technology of stearate and double decomposition method, applied in chemical instruments and methods, natural water treatment, water/sewage multi-stage treatment, etc., to achieve the effect of saving consumption, saving water costs, and saving waste water treatment costs

Active Publication Date: 2016-03-02
HANGZHOU OIL & FAT CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to produce a large amount of waste water problem in the existing stearate production, provide a kind of double decomposition method to produce stearate and produce the method for waste water reuse, this method operation process is simple and easy, utilizes equipment simple, and product quality is not affected impact, and can save production costs and wastewater treatment costs, with economic and social benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 8 tons of water in one kettle to produce calcium stearate by metathesis after the completion of the reaction, the calcium stearate solution is sent to the plate and frame filter press for pressure filtration, the calcium stearate stays in the plate and frame, and the filtrate is transported To the filtrate head tank, the weight of water shown in the filtrate head tank is 8 tons; add hydrochloric acid to the head tank to adjust the pH to 7; continue production, add 8 tons of filtrate to the reactor, then add 1 ton of stearic acid, and start stirring , heating the reactor until the reaction temperature, then adding a metered mass concentration of 30% sodium hydroxide solution, continuous stirring, until the saponification reaction is complete, finally adding a metered mass concentration of 15% calcium chloride solution, continue to stir , until the reaction is complete. After the filtrate is continuously reused for 10 times, it is discharged to the sewage station for ...

Embodiment 2

[0022] After adding 8 tons of water in a kettle to produce zinc stearate by double decomposition, the zinc stearate solution is sent to the plate and frame filter press for pressure filtration, the zinc stearate remains in the plate and frame, and the filtrate is transported To the filtrate head tank, the weight of water shown in the filtrate head tank is 7.8 tons; add sulfuric acid to the head tank to adjust the pH to 8; continue production, add 7.8 tons of filtrate to the reactor, then add 1 ton of stearic acid, start stirring , continue to add 200 kilograms of hot water, heat the reactor until the reaction temperature, then add a measured mass concentration of 30% sodium hydroxide solution, continue to stir until the saponification reaction is completed, and finally add a measured mass concentration of 15% sodium hydroxide solution Zinc sulfate solution, continue to stir until the reaction is complete. After the filtrate is continuously reused 6 times, it is discharged to t...

Embodiment 3

[0024] After adding 8 tons of water in a kettle to produce barium stearate by metathesis, the barium stearate solution is sent to the plate and frame filter press for pressure filtration, the barium stearate stays in the plate and frame, and the filtrate is transported To the filtrate head tank, the weight of water shown in the filtrate head tank is 7.6 tons; add hydrochloric acid to the head tank to adjust the pH to 7; continue production, add 7.6 tons of filtrate to the reactor, then add 1 ton of stearic acid, and start stirring , continue to add 400 kilograms of hot water, heat the reactor until the reaction temperature, then add a measured mass concentration of 30% sodium hydroxide solution, continue to stir until the saponification reaction is completed, and finally add a measured mass concentration of 15% sodium hydroxide solution Barium chloride solution, continue to stir until the reaction is complete. After the filtrate is continuously reused 12 times, it is discharge...

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Abstract

The invention relates to a method for double decomposition method production of a stearate and recycle of produced waste water. The method has a simple operation process, utilizes simple equipment, does not influence product quality, saves a production cost and a waste water treatment cost and has economic and social benefits. The method comprises 1, timely collecting stearate waste water in production, filtering the waste water and collecting the filtrate, 2, adjusting pH of the filtrate by an inorganic acid in a range of 5-9, 3, in re-production, recycling the adjusted collected filtrate, supplying water needed by production and carrying production, wherein the water supplement amount is 0-1 / 5 of the reactor total volume, and 4, repeating the processes 1, 2 and 3, after continuous production 5-20 times, feeding the filtrate into a sewage station and carrying out treatment.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to a method for recycling waste water produced by stearate production by a metathesis method. Background technique [0002] As a plastic additive, stearate plays an important role in different fields. A variety of stearates can be used as heat stabilizers in PVC resin processing. Calcium stearate can also be used as lubricants, paint flatting agents, plastic release agents, thickeners, etc. in addition to PVC heat stabilizers. , Zinc stearate can also be used as an accelerator in some fields, etc., and other stearates also have different application fields. [0003] Stearate manufacturers generally produce a variety of stearate products, such as calcium stearate, zinc stearate, barium stearate, and lead stearate. The double decomposition method produces stearate. At the beginning, stearic acid and sodium hydroxide undergo saponification reaction in a large amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/36
CPCC02F1/001C02F1/66C02F9/00C02F2103/36
Inventor 吴江浩周建东郭霞张奎王晓辉
Owner HANGZHOU OIL & FAT CHEM
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