95-73-8

Basic information

• Product Name: 2,4-Dichlorotoluene
• Synonyms: Benzene,2,4-dichloro-1-methyl-;Toluene, 2,4-dichloro-;toluene,2,4-dichloro-;2,4-DICHLORO TOLUNE;2,4-DICHLOROTOLUENE OEKANAL, 250 MG;2,4-Dichlorotoluene,98%;2,4-Dichlortoluol;36) 2,4-DICHLORO TOLUENE
• CAS NO: 95-73-8
• Molecular Formula: C₇H₆Cl₂
• Molecular Weight: 161.03
• EINECS: 202-445-8
• Product Categories: Organics;Aryl;C7;Halogenated Hydrocarbons;Building Blocks;Chemical Synthesis;Halogenated Hydrocarbons;Organic Building Blocks;Pesticides intermediate
• Mol File: 95-73-8.mol
• Article Data: 30

Chemical Properties

• Melting Point: -14 °C
• Boiling Point: 200 °C(lit.)
• Flash Point: 175 °F
• Appearance: Clear colorless/Liquid
• Density: 1.246 g/mL at 25 °C(lit.)
• Vapor Pressure: 0.502mmHg at 25°C
• Refractive Index: n20/D 1.546(lit.)
• Storage Temp.: Store below +30°C.
• Water Solubility: immiscible
• BRN: 1931691
• CAS DataBase Reference: 2,4-Dichlorotoluene(CAS DataBase Reference)
• NIST Chemistry Reference: 2,4-Dichlorotoluene(95-73-8)
• EPA Substance Registry System: 2,4-Dichlorotoluene(95-73-8)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 23-24/25
• RIDADR: UN 2810
• WGK Germany: 2
• RTECS: XT0730000
• TSCA: Yes
• HazardClass: 9
• PackingGroup: III
• Hazardous Substances Data: 95-73-8(Hazardous Substances Data)

Usage

Chemical Properties

clear colorless liquid

Uses

2,4-Dichlorotoluene was used as an oxidant and a solvent during anaerobic catalytic oxidation of secondary alcohols by using an in situ (N-heterocyclic carbene)-Ni(0) system. It was used as growth supplement in the culture media of Ralstonia sp. strain PS12. It was used to develop a sensitive method based on solid-phase microextraction followed by gas chromatography-tandem mass spectrometry for the analysis of chlorotoluenes in water samples.

Preparation

2,4-Dichlorotoluene is synthesized by diazotization and chlorination with 2,4-diaminotoluene as raw material. First, hydrochloric acid and water into the reaction pot, heated to 50°C, stirring under the dissolution of 2,4-diaminotoluene, then hydrochloric acid and cuprous chloride into the pot, the 1% sodium nitrite solution evenly added, the temperature is maintained at about 60°C, resting stratification, the lower layer of crude product washed with water to neutral, add alkali to alkaline, and then water to remove the alkali, divided 2,4-dichlorotoluene crude product, water distillation of finished products.

Synthesis Reference(s)

Tetrahedron Letters, 32, p. 2759, 1991 DOI: 10.1016/0040-4039(91)85078-J

General Description

Clear colorless liquid.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Simple aromatic halogenated organic compounds, such as 2,4-Dichlorotoluene, are very unreactive. Reactivity generally decreases with increased degree of substitution of halogen for hydrogen atoms. Materials in this group may be incompatible with strong oxidizing and reducing agents. Also, they may be incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.

Purification Methods

Recrystallise 2,4-dichlorotoluene from EtOH at low temperature or fractionally distil it. [Beilstein 5 IV 815.]

InChI:InChI=1/C7H6Cl2/c1-5-2-3-6(8)4-7(5)9/h2-4H,1H3

Synthetic route

(2,4-dichlorophenyl)methanol (1777-82-8) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With 2-pentanol; ReOCl3(SMe2)(OPPh3) for 17h; Green chemistry; chemoselective reaction;	98%
Multi-step reaction with 3 steps 1: diethylamino-sulfur trifluoride / dichloromethane / 1 h / -78 - 20 °C 2: tris(pentafluorophenyl)borate / 1,2-dichloro-ethane / 0.08 h / 20 °C / Glovebox; Schlenk technique 3: sodium tetrahydroborate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 18 h / 20 °C View Scheme

1-bromo-2,4-dichlorobenzene (1193-72-2) + dimethyl zinc(II) (544-97-8) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
(1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride In 1,4-dioxane for 2h; Heating;	91%

2,4-dichlorobenzaldeyhde (874-42-0) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With 2-pentanol; ReOCl3(SMe2)(OPPh3) for 17h; Green chemistry; chemoselective reaction;	91%

4-methylbenzene-1,3-diamine (95-80-7) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With potassium bisulfite; potassium chloride; cobalt(II) chloride In water at 70 - 75℃; for 2.33333h; Concentration; Temperature;	85%
With nitrosylsulfuric acid; acetic acid Behandlung der erhaltenen Diazoniumsalz-Loesung mit CuCl in konz. wss. HCl;
With hydrogenchloride; copper dichloride; sodium nitrite

2,4-dichlorobenzyl mercaptan (59293-67-3) → 2,4-dichlorotoluene (95-73-8) + bis-(2,4-dichloro-benzyl)-sulfide (6295-41-6) + 2,4-dichlorobenzaldeyhde (874-42-0) + 1,2-bis(2',4'-dichlorophenyl)ethane

Conditions	Yield
With tetrafluoroboric acid; triiron dodecarbonyl In benzene 1.) RT, 4 h; 2.) 60 deg C;	A 74% B 2% C 3% D 10%

para-chlorotoluene (106-43-4) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With aluminum (III) chloride; iron(III) chloride; chlorine; calcium chloride; zinc(II) chloride In water at 39℃; for 18h; Temperature; Molecular sieve; Autoclave; Inert atmosphere;	68.9%
With chlorine at 40 - 41℃; for 0.5h; Temperature;	68%
With perchloric acid; trichloroisocyanuric acid In water; acetic acid at 30℃; Rate constant; Thermodynamic data; Ea, ΔH(excit.), ΔS(excit.);

2,4 dichlorobenzoic acid (50-84-0) → (2,4-dichlorophenyl)methanol (1777-82-8) + 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With tricarbonyl(η(4)-cycloocta-1,5-diene)iron; phenylsilane In tetrahydrofuran at 20℃; for 24h; Inert atmosphere; UV-irradiation; chemoselective reaction;	A 67% B n/a

2,4-dichlorobenzyl mercaptan (59293-67-3) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
dicobalt octacarbonyl In water; benzene at 185 - 190℃; under 46543.3 Torr;	63%

toluene (108-88-3) → para-chlorotoluene (106-43-4) + 2-methylchlorobenzene (95-49-8) + 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With hydrogenchloride; sodium hypochlorite In water at 20℃; Product distribution; Further Variations:; Temperatures; molar quantity of reagents; Chlorination; oxidative chlorination;	A 29% B 63% C 3.5%
With oxone; potassium chloride In acetonitrile at 20℃; for 24h; Product distribution; Further Variations:; Reagents ratio;
With sulfuric acid; [BMIM]Cl; chlorine at 70℃; for 8h;

C32H24Cl2N(1+)*BF4(1-) → 2,4-dichlorotoluene (95-73-8) + 2,4-dichlorobenzyl fluoride (60211-56-5)

Conditions	Yield
at 180℃; under 0.5 Torr; for 3h;	A 20% B 45%

2,4-dichlorobenzyl mercaptan (59293-67-3) → 2,4-dichlorotoluene (95-73-8) + bis-(2,4-dichloro-benzyl)-sulfide (6295-41-6) + 2,4-dichlorobenzaldeyhde (874-42-0)

Conditions	Yield
With tetrafluoroboric acid; triiron dodecarbonyl In benzene 1.) RT, 4 h; 2.) 60 deg C;	A 41% B 32% C 3%

4-methylphenyltellurium trichloride (30895-98-8) → para-chlorotoluene (106-43-4) + 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With oxygen In benzene at 20 - 30℃; for 4h; Irradiation;	A 36% B 2%

2,4 dichlorobenzoic acid (50-84-0) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With dimethylsulfide borane complex In chlorobenzene 1) 15 min, r.t. 2) 4 h, reflux;	25%

2,4-dichloro-benzenemethanamine (95-00-1) → 2,4-dichlorotoluene (95-73-8) + 2,4-dichlorobenzyl fluoride (60211-56-5)

Conditions	Yield
at 200℃; under 2 Torr; for 3h;	A 5% B 20%

toluene (108-88-3) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With sulfuric acid; sodium chloride; sodium periodate In water; acetonitrile at 80℃; for 6h;	15%
With iron(III) chloride beim Chlorieren;
With molybdenum(V) chloride beim Chlorieren;

para-chlorotoluene (106-43-4) → 3,4-Dichlorotoluene (95-75-0) + 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
bei der Chlorierung;
With aluminium; mercury durch Chlorieren;
With iodine; chlorine

2-methylchlorobenzene (95-49-8) → 2,5-dichlorotoluene (19398-61-9) + 2,6-dichlorotoluene (118-69-4) + 2,4-dichlorotoluene (95-73-8) + 2,3-dichlorotoluene (32768-54-0)

Conditions	Yield
bei der Chlorierung;
With sulfuric acid; 1-butyl-3-methylimidazolium chloroaluminate; chlorine at 30℃; for 12h; Reagent/catalyst; Temperature;
With sulfuric acid; chlorine at 35℃; for 12h; Temperature; Molecular sieve;

2-methylchlorobenzene (95-49-8) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With iron(III) chloride beim Chlorieren;
With molybdenum(V) chloride beim Chlorieren;

3-chloro-p-toluidine (95-74-9) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
Diazotization.Behandlung der Diazoniumchloridloesung mit Cuprochlorid;

4-Methyl-3-nitroanilin (119-32-4) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
Austausch der NH2-Gruppe gegen Chlor, Reduktion und Ersatz der neu gebildeten NH2-Gruppe durch Chlor;

2,4-dichlorobenzyl mercaptan (59293-67-3) → 2,4-dichlorotoluene (95-73-8) + bis-(2,4-dichloro-benzyl)-sulfide (6295-41-6) + 2,4-dichloro-1-{[(2,4-dichlorobenzyl)disulfanyl]methyl}benzene (188065-31-8)

Conditions	Yield
With sodium hydroxide; triiron dodecarbonyl; tetra(n-butyl)ammonium hydrogensulfate In water; benzene at 60℃; for 16h;	A 95 % Chromat. B 3 % Chromat. C 2 % Chromat.
With sodium hydroxide; triiron dodecarbonyl; tetra(n-butyl)ammonium hydrogensulfate In water; benzene at 60℃; for 16h;	A 95 % Chromat. B 3 % Chromat. C 2 % Chromat.

hydrogenchloride (7647-01-0) + water (7732-18-5) + acetic acid (64-19-7) + toluene (108-88-3) → para-chlorotoluene (106-43-4) + 2-methylchlorobenzene (95-49-8) + 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
im Dunkeln an Platin-Anoden mit einer Stromdichte von 0.005 Amp./cm2.Electrolysis;

para-chlorotoluene (106-43-4) + iron → 3,4-Dichlorotoluene (95-75-0) + 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
at 20℃; sowie bei 40grad; Chlorierung;

2.4-dichloro-toluene-sulfonic acid-(3)-amide → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With steam; sulfuric acid at 230 - 240℃;
With phosphoric acid; steam at 230 - 240℃;

2.4-dichlorotoluene-sulfonic acid-(3) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With steam; sulfuric acid at 230 - 240℃;
With phosphoric acid; steam at 230 - 240℃;

4.6-dichloro-toluene-sulfonic acid-(2) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With steam; sulfuric acid at 230 - 240℃;
With phosphoric acid; steam at 230 - 240℃;

4.6-dichloro-toluene-sulfonic acid-(3) → 2,4-dichlorotoluene (95-73-8)

Conditions	Yield
With steam; sulfuric acid at 230 - 240℃;
With phosphoric acid; steam at 230 - 240℃;

hydrogenchloride (7647-01-0) + 4-methylbenzene-1,3-diamine (95-80-7) + copper chloride + sodium nitrite → 2,4-dichlorotoluene (95-73-8)

2,4-dichlorophenylethyl alcohol (81156-68-5) → 2,4-dichlorotoluene (95-73-8) + 2,4-dichlorostyrene (2123-27-5) + 6-chloro-2,3-dihydrobenzofuran

Conditions	Yield
Stage #1: 2,4-dichlorophenylethyl alcohol With sodium hydride In pyridine at 40℃; for 0.25h; Metallation; Stage #2: copper(l) chloride In pyridine for 4h; Cyclization; Ullman reaction; Heating;

2,4-dichlorotoluene (95-73-8) → 2,4-dichloro-1-(dibromomethyl)benzene (6425-26-9)

Conditions	Yield
With sodium bromate; hydrogen bromide In water at 65℃; for 0.333333h; Flow reactor; Irradiation; Green chemistry;	99%
With hydrogen bromide; sodium bromide In chloroform; water at 5 - 15℃; Electrolysis;	85%
With N-Bromosuccinimide; dibenzoyl peroxide In tetrachloromethane Reflux;	84%
With bromine

2,4-dichlorotoluene (95-73-8) + ortho-toluoyl chloride (933-88-0) → (2,4-Dichloro-5-methyl-phenyl)-o-tolyl-methanone

Conditions	Yield
With aluminium trichloride In carbon disulfide for 240h; Heating;	92%

2,4-dichlorotoluene (95-73-8) → 1,5-dichloro-2-methyl-4-nitrobenzene (7149-77-1)

Conditions	Yield
With nitric acid In 1,2-dichloro-ethane at 30 - 35℃; for 2h; Temperature; Reagent/catalyst;	91%
With sulfuric acid; nitric acid at -10℃;	80%
With sodium nitrate; sulfuric acid at 40℃; for 3h;	43%

2,4-dichlorotoluene (95-73-8) + acetyl chloride (75-36-5) → 2,4-dichloro-5-methylacetophenone (77344-73-1)

Conditions	Yield
With aluminium trichloride In carbon disulfide for 18h; Heating;	90%

2,4-dichlorotoluene (95-73-8) + benzoyl chloride (98-88-4) → 2,4-dichloro-5-methyl-benzophenone (16444-45-4)

Conditions	Yield
With aluminium trichloride In carbon disulfide for 72h; Heating;	89%
With carbon disulfide; aluminium trichloride

2,4-dichlorotoluene (95-73-8) → 2,4-Dichlorobenzyl chloride (94-99-5)

Conditions	Yield
With N-chloro-succinimide; N-hydroxyphthalimide; 2,3-dicyano-5,6-dichloro-p-benzoquinone In acetonitrile at 80℃; for 16h; Time; Sealed tube; Inert atmosphere;	89%
With 2,2'-azobis(isobutyronitrile); chlorine at 110℃; for 3h;	79.2%
With thionyl chloride; dibenzoyl peroxide

2,4-dichlorotoluene (95-73-8) + 3-Methylbenzoyl chloride (1711-06-4) → (2,4-Dichloro-5-methyl-phenyl)-m-tolyl-methanone

Conditions	Yield
With aluminium trichloride In carbon disulfide for 96h; Heating;	89%

2,4-dichlorotoluene (95-73-8) → 2,4 dichlorobenzoic acid (50-84-0)

Conditions	Yield
Stage #1: 2,4-dichlorotoluene With tert.-butylhydroperoxide; sodium hydroxide; tungsten(VI) oxide In water at 80℃; for 10h; Stage #2: With hydrogenchloride In water	83%
With sodium bromate; sulfuric acid; sodium bromide In water at 100℃; for 7h; Irradiation;	82%
With manganese(IV) oxide; sulfuric acid at 80℃;

2,4-dichlorotoluene (95-73-8) → 2,4-dichlorobenzaldeyhde (874-42-0)

Conditions	Yield
With dipotassium peroxodisulfate; ferrocene; iron(II) acetylacetonate In water; acetonitrile at 80℃; for 9h;	80%
With sodium molybdate; dihydrogen peroxide; cobalt(II) acetate; acetic acid; sodium bromide at 105℃; for 0.166667h; Temperature; Flow reactor;	30.1%
With bromine at 180 - 200℃; Erhitzen des Reaktionsgemisches mit konz. Schwefelsaeure auf 100-140grad;

2,4-dichlorotoluene (95-73-8) + p-Chlorothiophenol (106-54-7) → S-(4-chlorophenyl) 2,4-dichlorobenzothioate

Conditions	Yield
With tert.-butylhydroperoxide; sodium dodecyl-sulfate; iron(II) bromide In water at 100℃; for 24h;	79%

carbon dioxide (124-38-9) + 2,4-dichlorotoluene (95-73-8) → ortho-methylbenzoic acid (118-90-1) + 3-chloro-4-methylbenzoic acid (5162-82-3) + 5-chloro-2-methylbenzoic acid (7499-06-1) + p-Toluic acid (99-94-5)

Conditions	Yield
With tetrabutylammomium bromide In N,N-dimethyl-formamide at 5℃; electrolysis (I=0.4 A); Further byproducts given. Yields of byproduct given;	A n/a B n/a C n/a D 78%
With tetrabutylammomium bromide In N,N-dimethyl-formamide at 5℃; electrolysis (I=0.4 A); Yield given. Further byproducts given. Yields of byproduct given;

2,4-dichlorotoluene (95-73-8) + 4-methoxy-benzaldehyde (123-11-5) → 2,4-dichlorobenzyl 4-methoxybenzoate (899664-15-4)

Conditions	Yield
With tert.-butylhydroperoxide; copper(II) acetate dihydrate In decane at 100℃; for 5h;	78%

2,4-dichlorotoluene (95-73-8) → 2,4-dichlorobenzylnitrile (6574-98-7)

Conditions	Yield
With ammonia at 390℃; Reagent/catalyst;	77.3%
With bismuth(III) vanadate; ammonia at 440℃; under 760.051 Torr; Catalytic behavior; Temperature;	72.2%
With ammonia; oxygen; DC-108 at 400℃; Yield given;

2,4-dichlorotoluene (95-73-8) + sodium thiomethoxide (5188-07-8) → 3-Chloro-4-methylphenyl methyl sulphide (53250-85-4) + 4-chloro-2-(methylsulphenyl)toluene (82961-51-1)

Conditions	Yield
In N,N,N,N,N,N-hexamethylphosphoric triamide at 100℃; for 0.75h;	A 6% B 76%

2,4-dichlorotoluene (95-73-8) → 2,4-dichloro-5-methyl-benzenesulfonyl chloride (28286-86-4)

Conditions	Yield
With chlorosulfonic acid at 60℃; for 3h;	75%
With chlorosulphuric acid
With chlorosulfonic acid
With chlorosulphuric acid

2,4-dichlorotoluene (95-73-8) → 2,4-dichlorobenzaldoxime (56843-28-8)

Conditions	Yield
With tert.-butylnitrite; N-hydroxyphthalimide; copper diacetate In acetonitrile at 80℃; for 24h; Inert atmosphere;	75%

2,4-dichlorotoluene (95-73-8) + sodium methansulfinate (20277-69-4) → 4-methylsulfonyl-1-methyl-2-chlorobenzene (1671-18-7)

Conditions	Yield
With potassium phosphate; copper(l) iodide; (2S,4R)-4-hydroxy-N-(2-methylnaphthalen-1-yl)pyrrolidine-2-carboxamide In dimethyl sulfoxide at 120℃; Sealed tube; Inert atmosphere;	74%

2,4-dichlorotoluene (95-73-8) + benzaldehyde (100-52-7) → 2,4-dichlorobenzyl benzoate (899663-73-1)

Conditions	Yield
With tert.-butylhydroperoxide; copper(II) acetate dihydrate In decane at 100℃; for 6h;	71%

2,4-dichlorotoluene (95-73-8) + sodium isopropanethiolate (20607-43-6) → 2,4-bis(i-propylthio)toluene (87544-09-0)

Conditions	Yield
In N,N,N,N,N,N-hexamethylphosphoric triamide at 100℃; for 20h;	69.5%

triethyl(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)silane (745783-97-5) + 2,4-dichlorotoluene (95-73-8) → C13H17BCl2O2

Conditions	Yield
With C34H28ClF12IrN2Si In methyl cyclohexane at 100℃; for 16h; Inert atmosphere; Glovebox;	68%

2,4-dichlorotoluene (95-73-8) → 1-bromo-3,5-dichloro-2-toluene (115615-19-5)

Conditions	Yield
With bromine; iron(III) chloride In tetrachloromethane for 0.25h;	67%
With iron(III) chloride; bromine In tetrachloromethane at 20℃; for 0.5h; Inert atmosphere;	67%
With N-Bromosuccinimide In dichloromethane at 0 - 20℃; for 12h;	50%
With FeCl3; bromine In tetrachloromethane

2,4-dichlorotoluene (95-73-8) + acetophenone O-acetyloxime (19433-17-1) → 4-(2',4'-dichlorophenyl)-2,6-diphenylpyridine (1286729-10-9)

Conditions	Yield
With [bis(acetoxy)iodo]benzene; copper(II) bis(trifluoromethanesulfonate) In toluene at 100℃; for 8h;	64%

Upstream product

• 106-43-4 para-chlorotoluene 
• 95-49-8 2-methylchlorobenzene 
• 108-88-3 toluene 
• 59293-67-3 2,4-dichlorobenzyl mercaptan 
• 23749-65-7 2,4,6-trichlorotoluene 
• 320-60-5 2,4-dichloro-benzotrifluoride 
• 119-32-4 4-Methyl-3-nitroanilin 
• 60211-56-5 2,4-dichlorobenzyl fluoride 
• 1777-82-8 (2,4-dichlorophenyl)methanol 
• 874-42-0 2,4-dichlorobenzaldeyhde 
• 50-84-0 2,4 dichlorobenzoic acid 
• 7359-72-0 2,3,4-trichlorotoluene 
• 1193-72-2 1-bromo-2,4-dichlorobenzene 
• 544-97-8 dimethyl zinc(II) 

Downstream Products

• 873986-34-6 2-(2,4-dichloro-5-methyl-benzoyl)-benzoic acid 
• 16444-45-4 2,4-dichloro-5-methyl-benzophenone 
• 118-90-1 ortho-methylbenzoic acid 
• 95-49-8 2-methylchlorobenzene 
• 5162-82-3 3-chloro-4-methylbenzoic acid 
• 7499-06-1 5-chloro-2-methylbenzoic acid 
• 99-94-5 p-Toluic acid 
• 188290-36-0 thiophene 
• 130219-80-6 4-chloro-7-methylbenzothiophene 
• 344294-77-5 4-chloro-5-methylbenzothiophene 
• 106-43-4 para-chlorotoluene 
• 108-88-3 toluene 
• 85072-41-9 5-bromo-2,4-dichlorotoluene 
• 57369-77-4 2,4-dichloro-m-xylene 

Relevant articles and documents

Production process of high-purity 2,4-dichlorotoluene

The invention relates to the technical field of compound synthesis and purification, and particularly relates to a production process of high-purity 2,4-dichlorotoluene. The method comprises the following steps: carrying out catalytic synthesis on 2,4-dichlorotoluene by using p-chlorotoluene and chlorine, carrying out alkali washing, recovering fractions by rectifying, and carrying out purifying crystallization to obtain the high-purity 2,4-dichlorotoluene. The method solves the problem that 2,4-dichlorotoluene is low in yield and purity and is not easy to purify in the prior art. The prepared2,4-dichlorotoluene has the advantages that the yield is high, purity is high and materials can be recycled.

H β molecular sieve catalytic O-chlorotoluene preparation 2, 6 - dichloro toluene method (by machine translation)

The invention relates to 2, 6 - dichloro toluene preparation technology field, in particular to a molecular sieve catalyst H β of O-toluene selective chlorination of preparation 2, 6 - dichloro toluene. The invention relates to a low cost of O-toluene as the raw materials, chlorine is the chlorinating agent, H β molecular sieve as the catalyst, adopt the one-step chlorination process, catalytic O-toluene selective chlorination of preparation 2, 6 - dichloro toluene, the process is easy to operate, simple steps, low production cost, easy industrialization. (by machine translation)

A chloro-toluene-ionic liquid catalyst preparation 2,6 the method of [...] dichloro-toluene

The invention discloses a method for preparing 2,6-dichlorotoluene by catalyzing o-chlorotoluene with an ionic liquid. According to the method for preparing 2,6-dichlorotoluene, Cl2 is taken as a chlorinating agent, under the action of a catalyst, namely, an aluminium chlorate ionic liquid, a raw material, namely, o-chlorotoluene, is directionally chlorinated, and the 2,6-dichlorotoluene is prepared; an intermediate of the aluminium chlorate ionic liquid is [BMIM]Cl, the molar ratio of AlCl3 to [BMIM]Cl is 1:3, and the usage amount of the aluminium chlorate ionic liquid accounts for 0.1%-1% of the mass of o-chlorotoluene; the method for preparing 2,6-dichlorotoluene by selectively chlorinating the o-chlorotoluene is simple in technology and mild in reaction condition, the used aluminium chlorate ionic liquid is good in catalytic activity and good in stability, can be separated from a product easily and can significantly improve the selectivity of 2,6-dichlorotoluene, and the method has the very high industrial application value.