34345-47-6

Usage

Uses

Used in Water Treatment Industry:
POLY-L-ASPARTIC ACID SODIUM SALT is used as a chelating agent for the removal of heavy metals and scaling in water treatment processes, ensuring clean and safe water supply.
Used in Personal Care Industry:
In personal care products such as shampoos and detergents, POLY-L-ASPARTIC ACID SODIUM SALT is used as a dispersing agent and thickening agent, enhancing the product's performance and texture.
Used in Agriculture:
POLY-L-ASPARTIC ACID SODIUM SALT is used as a soil conditioner in agriculture, improving soil structure and promoting healthy plant growth.
Used in Construction Industry:
In the construction industry, POLY-L-ASPARTIC ACID SODIUM SALT is utilized as a concrete admixture, contributing to the improvement of concrete properties and durability.

Upstream product

• 1310-73-2 sodium hydroxide 
• 56-84-8 L-Aspartic acid 

Downstream Products

• 1116-13-8 N^α-lauryl-L-aspartic acid 
• 1116-12-7 N^α-decanoyl-L-aspartic acid 
• 1782-17-8 N-hexadecanoyl-L-aspartic acid 
• 220201-34-3 mono-L-aspartyl chlorin e6 tetrasodium salt 
• 56-41-7 L-alanin 
• 1428416-71-0 [2-(4-diethylaminobutyl)succinato][cis-(1,2-trans-cyclohexyldiamine)]platinum(II) phosphate 

Relevant academic research and scientific papers

Method for preparing L-asparaginic acid disodium

The invention discloses a method for preparing L-asparaginic acid disodium. The method comprises the following steps of performing a reaction at the temperature of 70-80 DEG C by using sodium carbonate or sodium hydroxide, and L-asparaginic acid as raw materials, and by using water as a solvent, after the reaction is finished, adjusting the pH value of reaction liquid to 9.0-12.0, decoloring the reaction liquid, performing filtration, performing concentration until the Baume degree of a solution is 40-45 degree Be, and reducing temperature; transferring the solution after temperature reduction is completed to a vacuum freeze drier, maintaining the pressure of the vacuum freeze drier to be 20-40Pa, performing pre-freezing at the temperature of minus 30 to minus 20 DEG C for 2-4h, and then maintaining the temperature to be at minus 25 to minus 15 DEG C for 3-5h; and drying materials after vacuum freeze-drying at the temperature of 70-80 DEG C for 3-6 hours, so as to obtain L-asparaginic acid disodium products. According to the method disclosed by the invention, an organic solvent is not used, so that the safety coefficient of production environment is increased; and the products are free from solvent residues, so that the quality of the products is improved, and the water content is easy to control.

METHODS FOR PRODUCING POLYASPARTIC ACID PRECURSOR POLYMER AND POLYASPARTIC ACID SALT

Disclosed are a method for producing a polyaspartic acid precursor polymer by polymerization using at least one kind selected from a product obtained from maleic anhydride and ammonia and, maleamic acid as a monomer, wherein at least part of carboxyl groups in the monomers are a tertiary amine salt; and an industrially inexpensive and simple method for producing a polyaspartic acid salt by treating the polyaspartic acid precursor polymer obtained by this method with a basic aqueous solution.

COMPOSITIONS AND METHODS OF MAKING A PHOTOACTIVE AGENT

An improved two stage reaction process for production of mono-L-aspartyl chlorin e6. In a first stage, the activation reaction between chlorin e6 and a carbodiimide produces a previously unknown anhydride in an activation reaction product. This reaction product is purified to remove a significant proportion of the precursors of di-L-aspartyl chlorin e6. The purified activation reaction product contains a higher concentration of the previously unknown anhydride. This purified reaction product is used in a second stage: a coupling reaction of the purified activation reaction product with aspartate. The coupling reaction produces a coupling reaction product that has significantly reduced di-L-aspartyl chlorin e6 concentration. This reduced di-L-aspartyl chlorin e6 concentration facilitates purification of mono-L-aspartyl chlorin e6 from the coupling reaction mixture.