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Pharmaceutical salt refining technology

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

Active Publication Date: 2019-06-25
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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  • Pharmaceutical salt refining technology

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 pharmaceutical salt refining technology. According to the pharmaceutical salt refining technology, natural bittern is taken as a raw material, first stage membrane treatment and second stage membrane treatment are carried out, double alkali method treatment is carried out, and at last evaporative concentration is carried out so as to obtain solid sodium chloride capable ofaccording with requirements in national pharmacopeia; original bittern is subjected to membrane penetration treatment directly, high cost caused by pH adjusting and cooling is avoided, and pharmaceutical salt refining can be realized at a relatively low operation 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 Applications(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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