摘要:
A process for the production of p-vinyl phenol by the dehydrogenation of p-ethyl phenol in a gaseous phase in the presence of a catalyst and a diluent wherein the dehydrogenation of p-ethyl phenol is effected with phenol and/or p-cresol being present in the reaction system in an amount of 5 to 50 wt % of the amount of p-ethyl phenol.
摘要:
A novel glycoprotein substance possessing a high antitumor activity is provided, which is recovered and isolated from the liquid portion coming from cooking of raw scallop shellfish with a hot aqueous solvent or vapor of such solvent and which is amphoteric electrolyte in nature with an average molecular weight of about 5000 and with an isoelectric point of pH 5.2.
摘要:
A process is described for converting glycol dialkyl ether without substantial formation of olefin oligomers by reaction with water, comprising reacting a feed glycol di-tertiary alkyl ether represented by structural formula (A) with water using a strongly acidic cation-exchange resin as a catalyst and a reaction temperature of from 40.degree. C. to 150.degree. C. under a pressure of from 1 to 70 kg/cm.sup.2 (absolute pressure) in a molar ratio of water/feed glycol di-tertiary alkyl ether represented by the structural formula (A) of from 0.05/1 to 60/1, to convert the ether of formula (A) into at least one of (1) glycol mono-tertiary alkyl ether represented by the structural formula (B) and tertiary alcohol represented by the structural formula (C), or (2) glycol mono-tertiary alkyl ether represented by the structural formula (B) tertiary alcohol represented by the structural formula (C) and tertiary olefin represented by the structural formula (D); wherein (A), (B), (C), and (D) are as follows: ##STR1## wherein R.sub.1 represents a methyl group, an ethyl group, or a propyl group, n represents an integer of from 1 to 10, and R.sub.2 represents an alkylene group having from 2 to 14 carbon atoms, and the total number of carbon atoms in the group --(R.sub.2 --O).sub.n -- is from 2 to 30.
摘要:
A process for producing over-based sulfurized alkaline earth metal phenates useful as lubricating oil or fuel oil additives comprising reacting a phenol, sulfur, a dihydric alcohol and an alkaline earth metal oxide or hydroxide with about 0.99 to about 0.001 gram equivalents per phenolic hydroxyl group, and reacting the reaction product with carbon dioxide at a temperature of about 50.degree. to about 230.degree. C.
摘要:
A process for the separation and purification of vinylphenol which comprises contacting crude vinylphenol containing vinylphenol and impurities such as phenol, alkylphenols, vinylphenol polymers and hydrocarbons countercurrently with an aqueous alkali solution together with a specific organic solvent.Vinylphenol obtained is useful as the raw material for the production of polyvinylphenol or a vinylphenol copolymer which is utilized as a thermoplastic resin, an ion exchange membrane, an adhesive, a glass fiber-reinforced composite or the like.
摘要:
A graft copolymer comprising a hydrocarbon polymer main chain and a side chain composed mainly of a styrene compound of the following formula (I) ##SPC1##wherein R is a hydrogen atom or an R'CO group, in which R' is a hydrocarbon group having 1 to 20 carbon atoms, and a polyene compound grafted to the hydrocarbon polymer main chain and a process for preparing the graft copolymer comprising graft-copolymerizing the above copolymer components with the hydrocarbon polymer by ionizing radiation. The graft copolymer is especially suitable as an ion-exchange membrane or a basic polymer matrix for an ion-exchange membrane.
摘要:
A novel composite is disclosed which comprises a specific metal-compound additive as well as a plastic material and gypsum and/or calcium sulfite. The composite is improved in that it emits very little or substantially no toxic gas such as sulfur dioxide and hydrogen sulfide when it is burned and when the ash thereof is contacted with water.
摘要:
A novel process for the production of pivalolactone is characterized by dehydrochlorinating monochloropivalic acid in vapor phase in the presence of a catalyst comprising at least one of the metal salts selected from the group consisting of phosphates and pyrophosphates of alkali metals, alkali earth metals, zinc, cadmium, aluminum, thalium, lead, manganese, cobalt and nickel, and chlorides of alkali earth metals, silver copper, thallium, lead and cobalt. Said catalyst may be further combined with an activator selected from the group consisting of the oxides of zirconium, arsenic and rare earth elements.
摘要:
A METHOD OF HYDRAULIC TRANSMISSION OF POWER WHICH COMPRISES EMPLOYING A FLUID COMPRISING A POLYETHYLENE GLYCOL MONOPIVALATE THE FENERAL FORMULA:
HO-(C2H4-O)N-CO-C(-CH3)3
WHEREIN N REPRESENTS AN INTEGER OF 2-4, AS A HYDRAULIC FLUID IN FLUID PRESSURE SYSTEMS. THE PRESENT INVENTION RELATES ALSO TO A HYDRAULIC FLUID COMPOSITION COMPRISING THE POLYETHYLENE GLYCOL MONOPIVALATE HAVING 2-4 OXYETHYLENE GROUPS AS A PRINCIPAL COMPONENT.
摘要:
METHOD OF PREVENTING DOUBLE BOND MIGRATION OF A MONOOLEFINIC HYDROCARBON DURING THE SELECTIVE HYDROGENATION OF A POLY-UNSATURAED HYDROCARBON (E.G. POLYOLEFINIC HYDROCARBON, ACETYLENIC HYDROCARBON) COEXISTING WITH A MONOOLEFINIC HYDROCARBON, EACH OF THE MONO-OLEFINIC HYDROCARBONS AND POLY-UNSATURATED HYDROCARBONS HAVING AT LEAST FOUR CARBON ATOMS, IN THE PRESENCE OF HYDROGEN, USING A PALLADIUM- OR NICKEL-HYDROGENATION CATALYST, WHICH COMPRISES ADDING CARBON MONOXIDE TO THE REACTION SYSTEM IN AN AMOUNT 1 TO 50 MOL. PERCENT BASED ON SAID HYDROGEN UNDER SELECTIVELY HYDROGENATION CONDITIONS.