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A kind of medicinal salt refining process

A medicinal salt and process technology, which is applied in the field of medicinal salt refining process, can solve the problems of increasing processing costs and achieve the effect of avoiding cost pressure

Active Publication Date: 2021-08-31
山东肥城精制盐厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, pH adjustment and cooling steps are added before entering the membrane, which undoubtedly increases the processing cost

Method used

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  • A kind of medicinal salt refining process
  • A kind of medicinal salt refining process
  • A kind of medicinal salt refining process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A medicinal salt refining process, the specific method is: after the natural brine is treated with a primary membrane and a secondary membrane, it is treated with a double alkali method, and finally evaporated and concentrated to obtain a refined pharmaceutical salt.

[0043] The natural brine is treated with the first-level membrane to obtain the first-level concentrated liquid and the first-level light liquid. The former is used separately, and the latter enters the second-level membrane for treatment to obtain the second-level concentrated liquid and the second-level light liquid. The former returns to the first-level membrane for treatment, and the latter Enter the double-alkali treatment step, and then obtain refined pharmaceutical salt through evaporation and concentration. "Other use" means that it can be used in other chemical fields to realize waste utilization.

[0044] The process parameters of the first-stage membrane treatment are: the recovery rate is 54%,...

Embodiment 2

[0051] A medicinal salt refining process, the specific method is: after the natural brine is treated with a primary membrane and a secondary membrane, it is treated with a double alkali method, and finally evaporated and concentrated to obtain a refined pharmaceutical salt.

[0052] The natural brine is treated with the first-level membrane to obtain the first-level concentrated liquid and the first-level light liquid. The former is used separately, and the latter enters the second-level membrane for treatment to obtain the second-level concentrated liquid and the second-level light liquid. The former returns to the first-level membrane for treatment, and the latter Enter the double-alkali treatment step, and then obtain refined pharmaceutical salt through evaporation and concentration. "Other use" means that it can be used in other chemical fields to realize waste utilization.

[0053] The process parameters of the first-stage membrane treatment are: the recovery rate is 70%,...

Embodiment 3

[0060] A medicinal salt refining process, the specific method is: after the natural brine is treated with a primary membrane and a secondary membrane, it is treated with a double alkali method, and finally evaporated and concentrated to obtain a refined pharmaceutical salt.

[0061] Add 2ppm of additives to natural brine and then perform primary membrane treatment and secondary membrane treatment. , Hypromellose acetate succinate mixed at a mass ratio of 1:0.3:0.05:3:0.8. The preparation method of the additive is as follows: acrylic acid-acrylic acid ester-sulfonate terpolymer, ethanolamine and triethylenetetramine are stirred and mixed evenly, and polyglycerol fatty acid ester, hypromellose acetate succinic acid are added while stirring. Esters, ultrasonic vibration treatment for 40 minutes.

[0062] The natural brine is treated with the first-level membrane to obtain the first-level concentrated liquid and the first-level light liquid. The former is used separately, and the...

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Abstract

The invention discloses a medicinal salt refining process. In the invention, natural brine is used as a raw material. After the first-level membrane treatment and the second-level membrane treatment, the double-alkali treatment is carried out, and finally the solid sodium chloride meeting the requirements of the Pharmacopoeia is obtained by evaporation and concentration. . The original brine directly passes through the membrane, avoiding the cost pressure brought by pH adjustment and cooling, so that the refining of medicinal salt can be realized at a lower operating cost.

Description

technical field [0001] The invention relates to a medicinal salt refining process. It belongs to the technical field of chemical technology. Background technique [0002] The medicinal salt of the present invention refers to medicinal sodium chloride, and its preparation source can be brine, sea salt or refined salt, wherein the original halogen has a wide range of sources and low raw material cost, and is one of the best raw materials for preparing medicinal salt. However, in addition to a large amount of sodium chloride in the original brine, there are also a small amount of sulfate, calcium ions and magnesium ions. Therefore, in the production process of medicinal salt, brine needs to be refined to remove sulfate, calcium ions and magnesium ions. [0003] At present, the relatively mature treatment process is to remove sulfate (<0.1g / l) by barium chloride method first, and then remove calcium and magnesium by double alkali method. Barium chloride is highly toxic in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/06C01D3/14
Inventor 马衍祯孟强刘万斌荆忠山
Owner 山东肥城精制盐厂有限公司
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