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Method of processing sodium saccharin crystallized mother liquid

A technology of crystallizing mother liquor and sodium saccharin, which is applied in organic chemistry and other fields, and can solve problems such as increased production costs, waste, and insoluble saccharin that cannot be recycled

Active Publication Date: 2015-04-29
三门峡环宇生化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the oily impurities precipitated during acid precipitation will stick together with a small amount of insoluble saccharin, so that this part of insoluble saccharin cannot be recovered, which will cause waste
In addition, because the amount of potassium permanganate and sodium metabisulfite used in the process of this saccharin sodium crystallization mother liquor treatment method is relatively large, thereby the selected production cost increases
Moreover, there are many processing steps and the operation is very inconvenient

Method used

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  • Method of processing sodium saccharin crystallized mother liquid

Examples

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Effect test

Embodiment 1

[0019] Vacuum pump 2000kg of saccharin sodium crystallization mother liquor into a 5000L enamel decolorization kettle, measure its Baume concentration to be 27°Bé, take 200g of saccharin sodium crystallization mother liquor, add water to dilute to 11°Bé, add ice to cool to 5°C, add 30 Adjust % dilute sulfuric acid to pH=2.5 to generate oily impurities; separate oily impurity oil, continue to add 30% dilute sulfuric acid to the reaction solution to adjust to pH=1.0, generate saccharin, separate saccharin by suction filtration, drain and dry the saccharin, Obtain 49.2g of insoluble saccharin, thus it can be calculated that the anhydrous saccharin sodium contained in 200g of saccharin sodium crystallization mother liquor is: 49.2×205.19÷183.19=55.11g, wherein, 205.19 is the molecular weight of anhydrous saccharin sodium, and 183.19 is the molecular weight of insoluble saccharin . Then, the molecular weight of known zinc nitrate is 297.49, can calculate 2000kg saccharin sodium cry...

Embodiment 2

[0024] Vacuum pump 2000kg of saccharin sodium crystallization mother liquor into a 5000L enamel decolorization kettle, measure its Baume concentration to be 27.5°Bé, take 200g of saccharin sodium crystallization mother liquor, add water to dilute to 11°Bé, add ice to cool to 5°C, add 30 % dilute sulfuric acid is adjusted to pH=2.5 to generate oily impurities; to separate oily impurities, continue to add 30% dilute sulfuric acid to the reaction solution to adjust to pH=1.0 to generate saccharin, separate saccharin by suction filtration, drain and dry the saccharin to obtain The insoluble saccharin is 53.4g, so it can be calculated that the anhydrous saccharin sodium contained in the 200g saccharin sodium crystallization mother liquor is: 53.4×205.19÷183.19=59.81g, wherein, 205.19 is the molecular weight of anhydrous saccharin sodium, and 183.19 is the molecular weight of the insoluble saccharin. Then, the molecular weight of known zinc nitrate is 297.49, can calculate 2000kg sod...

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Abstract

The invention discloses a method of processing sodium saccharin crystallized mother liquid. The method adopts zinc sulfate or zinc chloride or zinc nitrate or zinc acetate to carry out chemical reactions with sodium saccharin crystallized mother liquid, which is generated during the sodium saccharin production process, in a water solution, then zinc saccharin crystal or crystal powder is generated, the zinc saccharin crystal or crystal powder is subjected to a recrystallization process, zinc saccharin crystal with a certain size is produced after the recrystallization process, neutral reaction waste liquid is generated during the chemical reactions of generating zinc saccharin, so acid waste water discharge is avoided, pollution to environment is effectively reduced, and environment protection is benefited. Because the zinc ions can react with saccharin groups to generate zinc saccharin and do not react with oil impurities, oil impurities and saccharin are easily separated in the sodium saccharin crystallized mother liquid, and saccharin in the sodium saccharin crystallized mother liquid can be maximally recycled. In the treatment process, it is no need to add other solvents, thus the production cost is largely reduced, the operation process is simple and convenient, and the work strength of the operators is reduced.

Description

technical field [0001] The invention relates to a method for treating the crystallization mother liquor intermediate produced in chemical production, in particular to a method for treating the crystallization mother liquor of sodium saccharin. Background technique [0002] Sodium saccharin is the sodium salt of saccharin, which is usually used as a food sweetener. In 2011, saccharin has been approved as a food sweetener by the governments of more than 100 countries and regions including the United States and China, and saccharin sodium is the sodium salt of saccharin, which is also allowed as a food sweetener. [0003] The saccharin sodium crystallization mother liquor produced in the crystallization process in the production process of saccharin sodium can often be used repeatedly. But, along with the increase of application times, the color of the sodium saccharin crystallization mother liquor will gradually deepen, and a kind of yellow viscous oily impurity will also be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D275/06
Inventor 张卫民
Owner 三门峡环宇生化科技有限公司
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