公开(公告)号：JPS61191661A

公开(公告)日：1986-08-26

申请号：JP3055285

申请日：1985-02-20

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TSUMURA RYUICHIRO ,  MIYATA KATSUJI ,  KASUGA TAKAHARU ,  IKEDA KEIICHI

IPC: C07B61/00 ,  B01J31/00 ,  B01J31/02 ,  B01J31/22 ,  B01J31/36 ,  C07C67/00 ,  C07C241/00 ,  C07C263/14 ,  C07C265/00 ,  C07C265/12 ,  C07C265/14

Abstract: PURPOSE:The reaction between an aromatic nitro compound and carbon monoxide is carried out in the presence of a major catalyst and a cocatalyst of vanadium compound to enable easy and high-yield production of the titled compound which is used a feedstock for polyurethane or agricultural chemicals. CONSTITUTION:When an aromatic isocyanate is produced by reaction between an aromatic nitro compound and carbon monoxide in the presence of a catalyst selected from a mixture of Pd or its mixture with a nitrogen-containing heterocy clic compound, Pd complex containing the said heterocyclic compound as a ligand and a mixture thereof with the said nitrogen-containing heterocyclic compound at elevated temperature and pressure, the reaction is carried out in the presence of an active hydrogen-bearing compound such as HCN, using a cocatalyst which is composed of a phosphorus compound such as PF3, a vanadium compound such as VCl3 and tertiary amine such as triethylamine. The objective compound is obtained by distillation of the reaction mixture.

公开(公告)号：JPS56169648A

公开(公告)日：1981-12-26

申请号：JP7373980

申请日：1980-06-03

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TAKAGI USAJI ,  KASUGA TAKAHARU ,  TSUMURA RIYUUICHIROU

IPC: B01J31/00 ,  B01J31/02 ,  C07C67/00 ,  C07C201/00 ,  C07C201/10 ,  C07C205/02

Abstract: PURPOSE:To obtain the titled substance in high selectivity and in high yield, by reacting an inexpensive lower alkyl chloride as a raw material which is made to exist in an organic phase with an aqueous solution of an alkali metal salt of nitrous acid using a catalyst transferring between phases under mild conditions. CONSTITUTION:A 1-3C lower alkyl chloride, e.g., methyl chloride, is present directly in the absence of a solvent, or dissolved in a widely used solvent immiscible with water, e.g., petroleum ether, benzene, etc. so that it exists in the organic phase, while an alkali metal salt of nitrous acid is made into an aqueous solution and the salt is made to exist in the water phase. The both compounds are reacted using a catalyst transferring between the organic and the water phases, to give a corresponding lower nitroparaffin. Various kinds of quaternary ammonium salts, quaternary pyridinium salts, quaternary salts of pyridine homologues, quaternary phosphonium salts, etc. are used as the catalyst transferring between the phases. The reaction temperature is 5-90 deg.C, preferably 15-40 deg.C, and the reaction pressure is properly normal pressure to 5kg/cm G.

公开(公告)号：JPS56138159A

公开(公告)日：1981-10-28

申请号：JP4019080

申请日：1980-03-31

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TSUMURA RIYUUICHIROU ,  TAKAGI USAJI ,  KASUGA TAKAHARU ,  IKEDA KEIICHI

IPC: B01J23/00 ,  B01J23/28 ,  B01J31/00 ,  B01J31/22 ,  C07C67/00 ,  C07C241/00 ,  C07C265/00

Abstract: PURPOSE:To obtain the titled compound useful as a raw material for polyurethane, by reacting an aromatic nitro compound with CO in the presence of a mixture of a platinum group metallic compound with a heterocyclic aromatic nitrogen compound as a catalyst and Mo as a cocatalyst. CONSTITUTION:An aromatic nitro compound, e.g. nitrobenzene, is reacted with CO in the presence of at least one of catalyst selected from (A) a mixture of a platinum group metallic compound with a heterocyclic aromatic nitrogen compound, (B) a complex of the platinum group metallic compound with the heterocyclic aromatic nitrogen compound and (C) a mixture of the complex with the heterocyclic aromatic nitrogen compound and a heteropoly-acid of Mo, e.g. H4(SiMo12O40), as a cocatalyst to give an aromatic isocyanate in high yield industrially and advantageously. EFFECT:The heteropoly-acid of Mo shows improved effect on the activation and stabilization of the catalyst.