L-phenylglycine decolorization process

A technology of L-phenylglycine and process is applied in the field of L-phenylglycine decolorization technology, which can solve the problems of single decolorization process and unsatisfactory decolorization effect of L-phenylglycine, and achieve the effects of excellent decolorization effect, excellent decolorization effect and low production cost.

Active Publication Date: 2020-05-12
HEBEI HUAXU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing L-phenylglycine decolorization process is single and the decolorization effect is not ideal, the present invention provides a decolorization process of L-phenylglycine which is environmentally friendly and has good decolorization effect

Method used

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  • L-phenylglycine decolorization process
  • L-phenylglycine decolorization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The solution produced by 1000ml L-phenylglycine (pH=9.5, absorbance ((λ=410nm) 1.305) was heated to 50°C, and then the solution produced by L-phenylglycine was passed through a 50mm glass column equipped with a decolorant, and the outside of the glass column was wrapped with Heating belt, heating belt with temperature control system control, control the temperature of the glass column to 60±5°C, control the outflow rate of the solution produced by L-phenylglycine from the glass column to 7ml / min, collect the effluent solution from the glass column, and it is completed Decolorization treatment. The absorbance (λ=410nm) of the outflowing L-phenylglycine solution was detected to be 0.206.

[0020] Described depigmentation agent is: 4g molecular sieve, 7g NaZSM-8 (Si / Al greater than 200) molecular sieve, 25g Naβ (Si / Al greater than 200) molecular sieve, 64g USY molecular sieve. The molecular sieves used are small balls with a diameter of 2-3mm.

[0021] The above-mention...

Embodiment 2

[0025] The solution produced by 1000ml L-phenylglycine (pH=9.5, absorbance ((λ=410nm) 1.305) was heated to 60°C, then the solution produced by L-phenylglycine was passed through a 50mm glass column equipped with a decolorant, and the outside of the glass column was wrapped with Heating belt, heating belt with temperature control system control, control the temperature of the glass column to 60±3°C, control the outflow rate of the solution produced by L-phenylglycine from the glass column to 8ml / min, collect the effluent solution from the glass column, and it is completed Decolorization treatment. The absorbance (λ=410nm) of the outflowing L-phenylglycine solution was detected to be 0.207.

[0026] Described decolorizing agent is: AlPO 4 -34 molecular sieve 5g, NaZSM-5 (Si / Al greater than 200) molecular sieve 15g, Naβ (Si / Al greater than 200) molecular sieve 30g, NaY molecular sieve 50g. The molecular sieves used are small balls with a diameter of 2-3 mm.

[0027] The above-m...

Embodiment 3

[0031] The solution produced by 1000ml L-phenylglycine (pH=9.5, absorbance ((λ=410nm) 1.305) was heated to 70°C, and then the solution produced by L-phenylglycine was passed through a 50mm glass column equipped with a decolorant, and the outside of the glass column was wrapped with Heating belt, heating belt with temperature control system control, control the temperature of the glass column to 70±5°C, control the outflow rate of the solution produced by L-phenylglycine from the glass column to 9ml / min, collect the effluent solution from the glass column, and it is completed Decolorization treatment. The absorbance (λ=410nm) of the outflowing L-phenylglycine solution was detected to be 0.207.

[0032] Described depigmentation agent is: Molecular sieve 2g, AlPO 4 -34 molecular sieve 5g, NaZSM-8 (Si / Al greater than 200) molecular sieve 5g, NaZSM-11 (Si / Al greater than 200) molecular sieve 10g, mordenite (Si / Al greater than 100) 20g, USY molecular sieve 40g, AlPO 4 -5 molecula...

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Abstract

The invention provides a de-coloring technology of D-2-phenylglycine and belongs to the technical field of production of the D-2-phenylglycine. The de-coloring technology comprises the following steps: enabling a solution for producing the D-2-phenylglycine to pass through a glass column filled with a de-coloring agent and carrying out de-coloring treatment; heating the solution for producing theD-2-phenylglycine to 50 to 100 DEG C; then enabling the solution for producing the D-2-phenylglycine to pass through the glass column; controlling the temperature of the glass column to 55 to 80 DEG Cand controlling the flowing-out speed of the solution for producing the D-2-phenylglycine from the glass column to 7 to 9ml / min; collecting a flowing-out solution from the glass column so as to finish de-coloring treatment. According to the de-coloring technology provided by the invention, a coloring impurity and a coloring-assisting impurity in the production of the D-2-phenylglycine are more pertinently removed and the removal effect is excellent and is remarkably better than de-coloring requirements of the production of the D-2-phenylglycine; the de-coloring technology has the advantages of greenness and environment friendliness and low production cost.

Description

technical field [0001] The invention belongs to the technical field of L-phenylglycine production and relates to a decolorization process for L-phenylglycine. The decolorization process of the invention is simple in operation, stable in the decolorization process and good in decolorization effect on L-phenylglycine. Background technique [0002] Chemical and pharmaceutical products generally have high requirements on color. In order to meet the standard of product color, decolorization process is generally used in industry for decolorization. Because activated carbon has a wide pore size distribution, it can absorb various color-forming impurities of different sizes and help color. Therefore, activated carbon is widely used as a broad-spectrum decolorizing agent in the chemical and pharmaceutical fields, but there are great problems in the use of activated carbon. There can be one or several pores with corresponding sizes to play a decolorizing effect, but most of the pores ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C227/40C07C229/42
CPCC07B2200/07C07C227/40C07C229/42
Inventor 路万里齐翠国郑本荣王占良刘玉生孟寸双
Owner HEBEI HUAXU CHEM
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