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Desalination and concentration method of medical intermediate

A technology for intermediates and medicines, which is applied in the field of desalination and concentration of pharmaceutical intermediates, can solve the problems of complicated operation, insignificant desalination and concentration effects, and reduced use value of pharmaceutical intermediates, and achieves a high concentration effect and improved use value. Effect

Inactive Publication Date: 2019-12-10
HENAN RENHUA BIOTECH CO LTD
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Problems solved by technology

[0003] During the production and processing of pharmaceutical intermediates, they need to be desalted and concentrated. The existing desalination and concentration effects are not obvious, and the operation is complicated, which reduces the use value of pharmaceutical intermediates. Therefore, we propose a pharmaceutical intermediate Desalination and Concentration Methods

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] see Figure 1-2 , a method for desalting and concentrating a pharmaceutical intermediate, the preparation method comprising the following steps:

[0021] A. Pour the pharmaceutical intermediate raw material containing 10% to 30% salt into the electrodialyzer;

[0022] B. Cool the raw materials of pharmaceutical intermediates after desalination to 20°C to 30°C;

[0023] C. Transport the cooled pharmaceutical intermediate raw materials to the inside of ...

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Abstract

The invention discloses a desalination and concentration method of a medical intermediate. The method comprises the following steps: A, pouring a medical intermediate raw material containing 10-30% ofsalt into an electrodialyzer; B, cooling an obtained desalted medical intermediate raw material to 20-30 DEG C; c, conveying the cooled medical intermediate raw material into an evaporation concentrator; and D, evaporating and concentrating the medical intermediate raw material by adopting the evaporation concentrator. According to the method, the electrodialyzer is adopted, under the action of adirect-current electric field, potential difference is used as driving force, so that an electrolyte is separated from a solution under the effect of selective permeability of ion exchange membrane,and the purposes of desalination, concentration, and refining or purification of the solution are realized; and the desalinated raw material can be effectively subjected to evaporation concentration by adoption of the evaporation concentrator, and the concentration effect is improved, and the use value of the medical intermediate is increased at last.

Description

technical field [0001] The invention relates to the technical field of preparation of pharmaceutical intermediates, in particular to a method for desalting and concentrating pharmaceutical intermediates. Background technique [0002] The so-called pharmaceutical intermediates are actually some chemical raw materials or chemical products used in the process of pharmaceutical synthesis. Such chemical products do not require a pharmaceutical production license and can be produced in ordinary chemical factories, as long as they meet certain requirements. level, which can be used in the synthesis of medicines. [0003] During the production and processing of pharmaceutical intermediates, they need to be desalted and concentrated. The existing desalination and concentration effects are not obvious, and the operation is complicated, which reduces the use value of pharmaceutical intermediates. Therefore, we propose a pharmaceutical intermediate Desalination and concentration method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/42B01B1/00A61J3/00
CPCA61J3/00B01B1/00B01D61/422
Inventor 王铁柱
Owner HENAN RENHUA BIOTECH CO LTD
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