6582-52-1

Basic information

• Product Name: 2,2'-methylenedianiline
• Synonyms: 2,2'-methylenedianiline;2,2'-Diaminodiphenylmethane;2,2'-Methylenebis(benzeneamine);Aniline, 2,2'-methylenedi-;Benzenamine, 2,2'-methylenebis-;Einecs 229-512-4;2-[(2-aminophenyl)methyl]aniline
• CAS NO: 6582-52-1
• Molecular Formula: C13H14N2
• Molecular Weight: 198.26366
• EINECS: 229-512-4
• Mol File: 6582-52-1.mol
• Article Data: 16

Chemical Properties

• Melting Point: 134-135 °C
• Boiling Point: 390.2°Cat760mmHg
• Flash Point: 226.8°C
• Appearance: /
• Density: 1.143g/cm³
• Storage Temp.: Keep in dark place,Inert atmosphere,Room temperature
• Solubility: Acetonitrile (Slightly), Chloroform (Slightly)
• PKA: 4.27±0.10(Predicted)
• CAS DataBase Reference: 2,2'-methylenedianiline(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2'-methylenedianiline(6582-52-1)
• EPA Substance Registry System: 2,2'-methylenedianiline(6582-52-1)

Safety Data

• Hazardous Substances Data: 6582-52-1(Hazardous Substances Data)

Usage

Uses

2,2''-Methylenedianiline is used in the production of rigid polyurethane foams.

Upstream product

• 21540-57-8 1-nitro-2-[(2-nitrophenyl)methyl]benzene 
• 2225-56-1 1,2-dihydrodibenzo--diazepine 
• 1208-52-2 2,4'-diaminodiphenylmethane 
• 101-77-9 4,4'-diamino diphenyl methane 
• 50-00-0 formaldehyd 
• 62-53-3 aniline 
• 26946-33-8 4,4'-methylenebis(m-nitroaniline) 
• 622-14-0 N,N'-diphenylmethylenediamine 
• 142-04-1 aniline hydrochloride 
• 98-95-3 nitrobenzene 
• 256-91-7 11H-dibenzo{c,f}-{1,2}diazepine 
• 65177-64-2 2,2'-dinitro-4,4'-diaminodiphenylmethane dihydrogensulfate 
• 1092-56-4 4,4'-diiodo-2,2'-dinitrodiphenylmethane 

Downstream Products

• 159428-07-6 C₄₉H₄₀N₂P₂ 
• 2536-05-2 4,4′-methylenebis(phenylisocyanate) 
• 5873-54-1 2,4'-diisocyanatodiphenylmethane 
• 101-68-8 di(4-isocyanatophenyl)methane 
• 260-94-6 acridine 
• 92-81-9 acridine 
• 24650-10-0 2,4'-methylene-dicyclohexyldiamine 
• 648900-91-8 N-methyl-4,4'-diaminodicyclohexylmethane 
• 1761-71-3 4,4'-diaminodicyclohexylmethane 
• 70906-77-3 2,2'-methylene-dicyclohexyl-diamine 
• 119346-89-3 N-Acetyl-N-(2-benzo[c]isothiazol-3-yl-phenyl)-acetamide 
• 119346-85-9 3-(2-aminophenyl)-2,1-benzisothiazole 

Relevant articles and documents

HETEROGENEOUS SYNTHESIS OF METHYLENE DIANILINE

The present invention relates to a catalytic material for the preparation of one or more of 4,4'- methylenedianiline, 2,2'-methylenedianiline, 2,4'-methylenedianiline, and oligomers of two or more thereof, the catalytic material comprising an oxidic support, wherein the oxidic support comprises an element EOS1 selected from the group consisting of Ti, Zr, Al, Si, and mixtures of two or more thereof, and further comprising a supported material supported on the oxidic support, wherein the supported material comprises an element ESM1 selected from the group consisting of Ti, Zr, V, Nb, Ta, Mo, W, Ge, Sn, Sc, Y, La, Ce, Nd, Pr, Hf, Cr, Fe, Co, Ni, Cu, Zn, Pb, and mixtures of two or more thereof. Further, the present invention relates in particular to a process for the preparation of a catalytic material and to a process for the preparation of one or more of 4,4'-methylenedianiline, 2,2'-methylenedianiline, 2,4'-methylenedianiline and oligomers of two or more thereof.

METHOD OF PRODUCING DIAMINES AND POLYAMINES OF THE DIPHENYLMETHANE SERIES

The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, by condensing aniline and formaldehyde followed by an acid-catalysed rearrangement at different production capacities with alteration of the content of diamines of the diphenylmethane series (altering the binuclear content). Adapting the molar ratio of the total used aniline to the total used formaldehyde and adapting the reaction temperature allows the rearrangement reaction to be fully completed despite the change in dwell time inevitably associated with a change in production capacity, and allows the formation of undesired by-products to be avoided as far as possible; the intended modification to binuclear content is likewise achieved.

A PROCESS FOR PREPARATION OF POLYMETHYLENE POLYPHENYL POLYAMINE

The present invention provides a method of preparing polymethylene-polyphenyl-polyamine (briefly referred to as polyamine, DAM), in which a high gravity rotating bed is used as the mixing reactor of formaldehyde and aniline hydrochloride, the mixing solution of aniline hydrochloride and circulation solution and the formaldehyde are fed into the high gravity rotating bed reactor proportionally to carry out mixing and condensation reaction under a condition of a very high gravity; the materials leaving the high gravity rotating bed reactor is introduced into a stirred vessel to proceed with the pre-condensation reaction and obtain a condensation solution; and the process steps of heating, molecular rearrangement, neutralization, water washing and purification, etc. are completed to obtain the refined DAM. With the method according to the present invention, the main by-products is obviously reduced in the condensation process, the phenomenon of deposit attaching to the inner walls of circulation pipes and heat exchange and blockage are prevented in the condensation process, the impurity content is low in the refined DAM, and the subsequent product MDI has a lighter color, the product quality is stable and may be improved to a certain extent.