 Home > Chemicals Industry > Chemical Technology > 2,5-Dichlorobenzoic acid product performance and production principle

2,5-Dichlorobenzoic acid product performance and production principle

 Last Update: 2021-08-07
 Source: Internet
 Author: User

Tags

1 2 ethanediol

ada carbon solutions

Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

The molecular formula of 2,5- dichlorobenzoic acid is C ₇ H ₄ C ₁₂ O ₂ , the molecular weight is 191.
0, and the structural formula is

1.
Product performance

Needle crystals; melting point 155.
5°C, boiling point 301°C; soluble in ethanol and ether , soluble in hot water; acidic, soluble in alkaline solutions; toxic
.

2.
Production principle

There are many synthetic methods for 2,5-dichlorobenzoic acid
.

(1) Chloromethylation method
.

It is obtained by the action of p-dichlorobenzene and paraformaldehyde , and then oxidation by potassium permanganate

(2) Trichlorobenzene method
.

Using 1,2,4-trichlorobenzene as a raw material, 2,5-dichlorobenzonitrile is prepared and then obtained by alkaline hydrolysis

(3) Phosgene method
.

By the reaction of p-dichlorobenzene and phosgene, 2,5-dichlorobenzoyl chloride is obtained, which is then obtained by hydrolysis

(4) Benzoyl chloride method
.

It is obtained by chlorination and hydrolysis of benzoyl chloride

The chlorination temperature of benzoyl chloride is controlled at 35-45°C, and the main component of the obtained chloride is 2,5-dichlorobenzoyl chloride (content 65%)
.

Then in the presence of concentrated sulfuric acid, it is hydrolyzed at 40-50°C

(5) Carbon tetrachloride method
.

Carbon tetrachloride and p-dichlorobenzene are alkylated under the catalysis of anhydrous aluminum trichloride to obtain the intermediate product 2,5-dichlorophenyl chloroform, which is then hydrolyzed with an aqueous solution of zinc dichloride to produce Get 2,5-dichlorobenzoic acid

This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Products

PTFE micropowder Coating white powder resistant to corrosion and friction

CAS No.: 9002-84-0

Chemical Grade

$19-20/KG FOB

High quality PVDF resin with chemical stability and heat resistance

CAS No.: 24937-79-9

Chemical Grade

$39-40/KG FOB

PES dispersion BSP-450 with temperature resistance milky liquid

CAS No.: 9002-84-0

Chemical Grade

$8-9/KG FOB

Hot Tags

united states jobs(223)

jobs united states(236)

1 year treasury(277)

1 year subscription(296)

announcements today(81)

80 20 company(94)

united states logo(227)

single use technology(195)

healthy food name(42)

ups united states(221)

Hot Articles

The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.