Chemical raw material Glycolic acid powder on sale

CAS:79-14-1

MF:C2H4O3

MW:76.05

EINECS:201-180-5

Specification: 99% min Glycolic acid powder

Sample:Glycolic acid powder

Packaging:1kg/bag, 25kg/drum

Brand:Henrikang

Appearance:white

Shelf Life: 2 Years

Test Method: HPLC

Glycolic acid powder Usage and Synthesis.

Glycolic acid can be used to prepare high molecular weight polyglycolic acid. Traditional polymer materials such as PET, PE, PP, PS, etc., although they bring a lot of convenience to people's lives and play an important role in social and economic development, but due to imperfect recycling, and its own can not be degraded or difficult to degrade in the earth environment, resulting in serious "white pollution", with the increasing attention of society to environmental protection, Various countries and regions have issued "plastic restriction order", and the development of degradable and environmentally friendly polymer materials to replace traditional non-degradable polymer materials has become an important research direction.

Uses of Glycolic acid powder.

Glycolic acid is mainly used as dyeing aid for wool and acrylic fiber, and is also used as raw material for making ethylene glycol, menthol glycolate and quinine glycolate and substitute for tartaric acid.

It is an important chemical raw material, used as a raw material for the manufacture of ethylene glycol, menthol glycolate and quinine glycolate. It can also produce tanning agent, hair dye, leather dyeing agent, fiber dyeing agent, adhesive, metal chelating agent, petroleum demulsifier, electroplating agent, aluminum plate etching agent, cellulose fabric crosslinking agent, stainless steel electric polishing agent, etc. Also used in food processing plants and cattle and shed cleaning agents, disinfectants, boiler anti-scale agents, copper and other metal surface treatment agents, and preparation of skin care cosmetics.

Organic synthesis of raw materials, can be used to produce ethylene glycol. Glycolic acid is mainly used as a cleaning agent. The mixed acid composed of 2% glycolic acid and 1% formic acid is a detergent with high efficiency and low cost, which is suitable for cleaning air conditioners. It can produce fiber dyeing agent, cleaning agent, welding agent ingredients, varnish ingredients, copper corrosion agent, adhesive, oil demulsifier and metal chelating agent, etc. Sodium salt and potassium salt of glycolic acid are used as additives for electroplating solution. Other uses are electrolytic grinding, metal pickling, leather dyeing and tanning agents. It can also be used as a chemical analysis reagent.

Preparation of Glycolic acid powder.

A process for producing glycolic acid from methyl glycolate comprises the following steps:

1) The molar ratio of methyl glycolate and water is 1: Under the action of resin solid acid catalyst, vacuum to 10 ~ 101kPaA, heat until the tower reactor liquid boils at 80 ~ 85℃, and carry out reaction rectification. During the reaction process, keep the temperature of the tower reactor liquid and boiling temperature unchanged, continue to recover the methanol condensate at the top of the tower, and after full reflux for 10 ~ 30min, When reflux ratio was adjusted to 0.5 ~ 3 and reaction time was 2 ~ 6h, glycolic acid aqueous solution was produced by tower reactor.

2) The glycolic acid solution obtained in the evaporation and concentration step 1, and the mass content of glycolic acid in the glycolic acid solution is enhanced to 70-90wt %;

3) decolorization to colorless;

4) Crystallize the product obtained in step 3, precipitate crystalline glycolic acid, filter and separate glycolic acid crystals, rinse and vacuum dry to obtain finished glycolic acid crystals;

5) Concentrate the filtrate in Step 4 directly or mix with the glycolic acid aqueous solution obtained in step 1, repeat steps 2) to 4), and recycle.

Product method of Bulk Glycolic acid powder.

1. Chloroacetic acid method Chloroacetic acid is hydrolyzed under alkaline conditions to obtain crude product, and then esterified by methanol to obtain methyl hydroxyacetic acid, and then distilled and hydrolyzed to obtain the finished product.

2. High temperature and high pressure method is prepared by the reaction of formaldehyde, carbon dioxide and water.

3. Cyaniding hydrolysis method is made of formaldehyde and hydrocyanic acid as raw materials, synthesized by cyaniding and acidic hydrolysis.

4. Sodium cyanide process with formaldehyde, sodium cyanide as raw materials, by adding cyanide and acid hydrolysis of two steps to prepare.