摘要:
An assembly for feeding, printing, and cutting a continuous web of material is provided. The web is fed from a roll supported in a roll feeding unit to a printer unit. The web can carry distinct image-receiving media items or can be a plain continuous web material. The assembly is particularly useful for feeding a web carrying pressure-sensitive adhesive labels to a laser printer. The printer produces printed images on each label as the web is fed through the printer. Then, the web can be cut to produce a finished roll of printed labels ready for application. The assembly includes a roll feeding unit, a printer, a controller for the roll feeding unit, and a controller for the printer which communicate with each other. The controller is responsive to sensors and signals received from the printer controller, and the printer controller is responsive to the sensors and signals received from the roll feeding unit controller. In this manner, the feeding, printing, and cutting of the web are controlled precisely.
摘要:
Higher-alkane sulfonyl halides are prepared by contacting a sulfur-containing compound, a halogen-containing compound, and a phase transfer agent within a reaction zone under reaction conditions.
摘要:
A process for producing a polymer is provided which can comprise, consist essentially of, or consists of, contacting an inorganic compound having the formula of M.sub.x H.sub.y Z.sub.p, in an aqueous medium, with an organic halide under a condition sufficient to effect the production of the polymer in which the polymer comprises repeat units having the formula of (C.sub.m H.sub.2m-q (R'.sub.q)--Z.sub.p).sub.n in which m is a whole number from 1 to about 20; Z can be S, Se, or combinations thereof; n is a number from about 5 to about 400; M is a metal or ammonium ion; x is a number filling the necessary valency of M; y is 0 or 1; q is a whole number from 0 to about 10 and p is a whole number from 1 to 4.
摘要:
A process which can be used to produce an aromatic sulfide compound having the formula of (R.sub.4-n)(X.sub.n)(W)Ar--S--R' is provided. The process comprises contacting, in the presence of a surfactant, a halo-substituted aromatic compound in an aqueous solution with a salt of a mercaptan under conditions sufficient to produce the aromatic sulfide in which the halo-substituted aromatic compound and salt of mercaptan are each present in an amount effective to synthesize the aromatic sulfide wherein R is hydrogen or a hydrocarbyl radical, X is a halogen, n is a number from 0 to 3, W is a substituent, Ar is an aromatic ring, and R' is a hydrocarbyl radical.
摘要:
A process for reducing the metal corrosiveness of an organic polysulfide comprises contacting the polysulfide with a metal such as a transition metal at an elevated temperature. A process for reducing the concentration of a polysulfide, having four or more sulfur atoms in the polysulfide molecule, in a polysulfide mixture is also provided which comprises contacting the polysulfide mixture with a metal such as a transition metal. Further provided is a process for reducing the concentration of an organic trisulfide in a mixture of an organic disulfide and trisulfide wherein the process comprises contacting the mixture with a metal such as a transitional metal.
摘要:
Product from the reaction of mercaptan with sulfur in the presence of a basic catalyst is treated by contacting with an alcohol-based solution containing an oxidizing agent and an inorganic basic catalyst followed by the recovery of a purified polysulfide product.
摘要:
This invention relates to a process for preparing polysulfide product generally containing an average of 3 to 6 sulfur atoms in high yield which degrades minimally over extended time periods. Minimal degradation is accomplished by a unique treatment process wherein chemical species, most notably unreacted mercaptans and catalysts which apparently promote degradation, are selectively removed from the polysulfide crude product.
摘要:
Selective hydrogenation of the unsaturated nitrogen-containing ring in heterocyclic aromatic compounds is promoted by the use of at least one hydrogenation catalyst selected from the group consisting of nickel, cobalt, palladium, platinum, ruthenium and rhodium in the presence of reaction modifiers exemplified by carbon monoxide, carbon disulfide and hydrogen sulfide.
摘要:
In accordance with the present invention it has been found that improved recovery of oil from a subsurface earth formation can be attained by injecting into the formation a surfactant system comprising a carboxylate surfactant, a cosurfactant and an electrolyte in concentrations and proportions to form an immiscible three-phase system with the reservoir oil comprising a predominantly oil phase, a microemulsion phase and an aqueous phase. The carboxylate surfactant is preferably selected from the group consisting of branched aliphatic carboxylates and mononuclear aromatic carboxylates. Where aliphatic carboxylates are utilized as a surfactant, it is preferred that the polar organic material utilized as a cosurfactant have a solubility in water less than about ten grams per hundred grams of water at about 20.degree. C. and, when an aromatic carboxylate is utilized as a surfactant, it is preferred that the polar organic material utilized as a cosurfactant have a water solubility greater than about ten grams per hundred grams of water at about 20.degree. C. In accordance with another aspect of the present invention, it has been found that surfactant systems containing carboxylate surfactants will recover optimum amounts of oil when a base is added to the surfactant system to adjust the pH to a value at which the surfactant system results in optimum oil recovery.
摘要:
A process which can be used to produce organic polysulfide compounds is provided. The process comprises contacting, in the presence of a catalyst, an organic disulfide with sulfur under conditions sufficient to produce an organic polysulfide wherein the organic disulfide, sulfur, and catalyst are each present in an amount effective to produce an organic polysulfide and the catalyst comprises a base and a surfactant.