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Amino alcohol preparation method using aqueous amino acid

An amino acid and amino alcohol technology, applied in the preparation of amino hydroxy compounds, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of low molar yield of alanine and low analytical content of amino propanol products.

Active Publication Date: 2012-02-08
JIANGSU KANGHENG CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The analysis content of the aminopropanol product prepared by the traditional process is low, and the molar yield to alanine is low

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0016] 100 grams of commercially available high-strength coconut shell activated carbon was heated at 80° C. for an hour with 1500 milliliters of 15% nitric acid solution, and filtered to obtain a filter cake. The filter cake was added to 1500 ml of 15% aqueous sodium hydroxide solution, stirred and washed, and filtered to obtain a filter cake. The filter cake was added into 1500 ml of 10% nitric acid solution, stirred and washed, and filtered to obtain a filter cake. The filter cake is washed with deionized water until the effluent is free of nitrate. Dissolve 9 grams of ruthenium trichloride and 1.5 grams of palladium chloride with 40 milliliters of 30% hydrochloric acid and 1500 milliliters of water, add 5 grams of commercially available polyethylene glycol 500 therein, and slowly suspend the above-mentioned modified carrier in the In the solution, preheat to 100, add 25 grams of 37% formaldehyde solution under stirring, adjust the pH of the solution to 8-9 with sodium hyd...

Embodiment 2

[0019] In a 1-liter autoclave, put 200 milliliters of water, 200 milliliters of methanol and 60 grams of L-2-propiocyanuric acid, take the above-mentioned catalyst, adjust the pH of the solution to 4 with sulfuric acid, start stirring, and pass hydrogen after the hydrogen replacement once, and heat up to 1300°C, pressure 7.0MPa, keep for 7 hours, intermittently feed hydrogen during the process, keep the pressure at 7.0MPa. After the reaction is finished, filter, filter the cake catalyst with the filtrate to steam, add NaOH (corresponding to the added phosphoric acid) into the reaction liquid, add ethanol with the same volume as water, and then place it below 10 degrees for 12 hours and filter. The solid is mainly sodium phosphate, and the filtrate is evaporated to remove water under vacuum conditions, and the remaining product after removing water is distilled under high vacuum—vacuum degree 750mmHg, temperature 100~120 degrees. Obtain 40 grams of L-2-aminopropanol, the analys...

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Abstract

The invention relates to an amino alcohol preparation method using aqueous amino acid as a raw material. The method employs a catalyst; and amino acid in aqueous solution or in a mixed solution of water and other solvent is reduced by hydrogen under catalyst effect, so as to synthesize amino alcohol through a one step method. The method has characteristics of simple steps, short production period, little pollution and low production costs, etc.

Description

technical field [0001] The invention relates to a method for preparing aminoalcohol from an aqueous amino acid, in particular to a method for synthesizing aminoalcohol through one-step hydrogen reduction by using a catalyst. Background technique [0002] The analysis content of the aminopropanol product prepared by the traditional process is low, and the molar yield to alanine is low. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing amino alcohol from water-based amino acid, which is characterized in that: the water-based amino acid is dissolved in an aqueous solution or a mixed solvent of water and water-miscible solvent, under the action of a catalyst, at a temperature of 60-100 ° C , pressure: 0.1-20MPa, ph: 1-5, under the condition that only hydrogen is contained in the reactor during the reaction process, amino alcohol is synthesized by one-step hydrogen reduction, and then distilled and crystallized to obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/08C07C213/00B01J23/46
Inventor 邱志刚石勇
Owner JIANGSU KANGHENG CHEM
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