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Prepn of guanidyl thiocyanate

A technology of guanidine thiocyanate and ammonium thiocyanate, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problem of low product purity and achieve good quality, high purity and reasonable principle Effect

Inactive Publication Date: 2004-09-08
方建文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the current production process, the purity of the product obtained is not very high, but in use, the purity requirement of guanidine thiocyanate is very high in some occasions

Method used

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  • Prepn of guanidyl thiocyanate
  • Prepn of guanidyl thiocyanate

Examples

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Embodiment Construction

[0017] A kind of preparation method of guanidinium thiocyanate, has following technological process: a, put guanidinium carbonate and ammonium thiocyanate that weight ratio is 2: 1 into reactor, react at 50~90 ℃ for 2 hours, get thiocyanate Guanidine acid crude product.

[0018] B, dissolving, at normal temperature, by the ratio of 1: 1 crude guanidine thiocyanate is dissolved in water;

[0019] c. Filtration to remove impurities such as raw materials and reaction by-products by filtration;

[0020] d, dehydration, the mother liquor after filtering is dehydrated at high temperature;

[0021] e, crystallization, supersaturated solution cooling, concentrated crystallization, obtained high-purity guanidine thiocyanate.

[0022] Further: the guanidinium thiocyanate after the e step is passed through b, c, d, e steps again, wherein the ratio with water is 1: 1 in the b step, obtains the guanidine thiocyanate of higher purity, and as required This step can be repeated multiple ti...

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Abstract

The present invention relates to chemical product and is especially the preparation process of guanidyl thiocyanate. The technological process includes the following steps: melting, dissolving, filtering, dewatering and crystallization, and can obtain high-purity guanidyl thiocyanate. The technological process is simple, practical and reasonable, and the guanidyl thiocyanate product has high quality and high purity over 99%.

Description

Technical field [0001] The present invention relates to a kind of production method of chemical product, especially the preparation method of guanidine thiocyanate. Background technique [0002] Guanidine thiocyanate, chemical name: urea thiocyanate, English name: Guanidine thio cyanate salt, its molecular formula is: (NH 2 ) 2 C: NH·HSCN (118.2). It is a white crystal with a melting point of 116-121°C. At 20°C, the pH value of 6mol / L in water is 4.5-6, and the solubility is completely dissolved. Can be used as biochemical reagents, pharmaceutical intermediates. It is used for degreasing in the oil industry, as a strong lipid degrading agent in daily chemical industry, and as a cell membrane breaking agent in biopharmaceuticals. Its structural formula is: [0003] [0004] In the current production process, the purity of the product obtained is not very high, but in use, the purity requirement of guanidine thiocyanate is very high in some occasions. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C277/04C07C277/06C07C279/02
Inventor 方建文
Owner 方建文
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