Mercapto-Benzothiazole

Mercapto-benzothiazole collectors are mainly comprised of mercapto-benzothiazole, benzimidazole, and benzoxazole. 

The sodium salt of mercapto-benzothiazole is often called as New Capnex, or MET. Mercapto-benzothiazole can be prepared from phenylamine and CS2 and sulfur. The synthetic reaction of mercapto-benzothiazole is as follows  

The flotation results of several sulfide minerals with sodium mercapto-benzothiazole as collector are listed in Fig. 1.7. NaOH and HCl were used to adjust pH. Meantime, 2 oil is used as frother in the flotation process. 

As shown in Fig. 1.7, sodium mercapto-benzothiazole performs strong collecting capability toward galena, but weak collecting capability toward pyrite. Comparison of sodium mercapto-benzothiazole and hulyl xanthate in the flotation of galena mineral is as follows  

It can be seen that the collecting capability of sodium mercapto-benzothiazole is 

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When two polymers interact or react with each other, they are likely to provide a compatible, even a miscible, blend. Epoxidized natural rubber (ENR) interacts with chloro-sulfonated polyethylene (Hypalon) and polyvinyl chloride (PVC) forming partially miscible and miscible blends, respectively, due to the reaction between chlorosulfonic acid group and chlorine with epoxy group of ENR. Chiu et al. have studied the blends of chlorinated polyethylene (CR) with ENR at blend ratios of 75 25, 50 50, and 25 75, as well as pure rubbers using sulfur (Sg), 2-mercapto-benzothiazole, and 2-benzothiazole disulfide as vulcanizing agents [32]. They have studied Mooney viscosity, scorch... 

These are active by a variety of mechanisms. The azaadamantane (25) decomposes in the cell to give formalin which presumably is the toxic species. The activity of 2-mercapto-benzothiazole (16) is probably related to its chelating ability (B-69MI11502), or, as already mentioned, the formation of dithiocarbamate. 

Bisbenzothiazolylalkanes could be obtained by cyclization of o-aminothiophenol with aromatic and certain aliphatic diacids. Acetic anhydride is used to obtain the most important 2-methylbenzothiazole. The reaction of an o-aminothiophenol with phosgene, and with thiophosgene or carbon disulfide, gives a 2-hydroxy- and a 2-mercapto-benzothiazole, respectively, o-Aminothiophenol adds to alkynecarbonitriles (514) forming vinylamines... 

SYNS BENZOTHIAZOLE-2-THIONE 2(3H)-BENZOTHIAZOLETHIONE 2-BENZOTHIAZOLYL MERCAPTAN CAPTAX KAPTAX MBT MERCAPTOBENZOTHIAZOLE 2-MERCAPTO-BENZOTHIAZOLE 2-MERKAPTOBENZOTIAZOL 2-MERKAPTOBENZTHIAZOL NCI-C56519 PENNAC MBT POWDER ROKON ROTAX SULFADENE USAF GY-3 USAF XR-29 VULKACIT MERCAPTO... 

ZINC BENZOTHIAZOLYL MERCAPTIDE ZINC BENZOTHIAZOL-2-YLTHIOLATE ZINC BENZO-THIAZYL-2-MERCAPTIDE ZINC MERCAPTO-BENZOTHIAZOLATE ZINC-2-MERCAPTO-BENZOTHIAZOLE ZINC MERCAPTOBENZO-THIAZOLE SALT ZMBT ZnMB... 

Reactions of 2-Mercaptobenzothiazoles. The (un)substituted 2-mercapto-benzothiazoles react with an amine and O2 in the presence of HjO and cobalt phthalocyanine to give high yields of sulphenamide (213) they also react with morpholine in the presence of NaOCl. These sulphenamides could be the first step in the conversion into disulphides (214). The 2-mercaptobenzothiazoles are substituted in alkaline solution with halo-compounds. ... 

Captax . [R.T. Vanderbilt] 2-Mercapto-benzothiazole accelerator for natural and synthetic mbbers. 

Sodium MBT Sodium mercaptobenzothiazole. See Sodium 2-mercapto-benzothiazole... 

The Pt clusters made up of 4 to 6 Pt atoms protected by N,N-Dimethylformamide were synthesized by Kawasaki et al. by previously reported process. These clusters were photo - luminescent with their emission maximum dependent upon the excitation wavelength. The composition of these clusters was determined by MALDI MS by ligand exchanging them with 2-mercapto-benzothiazole (MBT). The mass spectrum shown in Fig. 8A, consisted of a peak corresponding to Pt5(MBT)y as the dominant signal and it was in agreement with the simulated mass obtained in isotopic analysis. The clusters with 4 and 6 Pt atoms were also present which were assigned as shown in the Fig. 8A. °... 

Pu, Q. Sun, Q. Hu, Z. Su, Z. Application of 2-mercapto-benzothiazole-modified silica gel to on-line preconcentration and separation of silver for its atomic absorption spectrometric determination. Analyst 1998,123 (2), 239. 

Specific examples of mercapto compoimds include 2-mercapto-benzothiazole, 2-mercaptobenzoxazole, 2-mercaptobenzimidazole, 2-mercapto-4(3H)-quinazoline, and /S-mercaptonaphthalene (7). 

Med ENB Medium ethylidene norbornene TMQ Polymerised 2,2, 4-trimethyl-l, 2-dihydroquinoline DTPD N, N-diaryl-paraphenylene diamine FEF Fast extrusion furnace SRF Semi-reinforcing furnace MBT 2-Mercapto benzothiazole TMTDS Tetramethyl thiuram disulfide Tetrone A Dipentamethylene thiuram tetrasulfide ... 

C7H4NS2H (2-mercapto- benzothiazole) 100 °C in dioxane C2H6 evolution [38]... 

Toshiyuki Ishikawa, Masayo Sato, Yuko Itoh, Hrroki (Research Center, Mitsubishi Chemical Corporation, Yokohama, Japan). J. Photopolym. Sci. Technol. (1999), 12 (5), 711-716. Quenching of imidazoyl radical (Im ) produced in 2-[p-(diethyl-amino)styryl]naphtho[l, 2-d]thiazole (NAS) sensitized photolysis of 2,2 -bis(2-chlorophenyl)-4,4, 5,5Gtetraphenyl-l,l -bi-lH-imidazole (BI) in PMMA film in the presence of 2-mercapto-benzothiazole (MBT) was studied by laser flash photolysis using a total reflection cell. It was obsd. that MBT acted as an accelerator increasing the initial concn. of Im by slowing down the back electron-transfer from BI anion to NASA cation, and also quenched Im radical by hydrogen transfer. 

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