A method for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms, including bringing a raw material which contains a light hydrocarbon having 2 to 7 carbon atoms as a main component into contact with a catalyst composition for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms. The catalyst composition for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms is coated with an amorphous silicon oxide compound and contains a crystalline aluminosilicate, and the silicon oxide compound is a silicon oxide compound derived from a compound represented by X.sub.nSi(OR).sub.4-n, where X represents a hydrogen atom or an alkyl group, R represents an alkyl group, and n represents an integer of 0 to 4.

The present invention has as its object the provision of a method for producing 1,3-butadiene capable of efficiently purifying an absorption solvent while a high productivity is assured.

A method for producing 1,3-butadiene includes: a step (A) of obtaining a produced gas containing 1,3-butadiene; a step (B) of cooling the produced gas; a step (C) of separating the produced gas, which has been subjected to the step (B); a step (D1) of separating the absorption solvent, that has absorbed an absorption component comprising the other gases containing 1,3 -butadiene into an absorption solvent that does not substantially contain the absorption component and an absorption solvent that contains the absorption component; a step (D2) of separating the absorption solvent that contains the absorption component into an absorption solvent that contains a reaction by-product and a 1,3-butadiene liquid; and a step (E) of purifying the absorption solvent, that contains the reaction by-product.

By fluorinating 1,2,3,3-tetrachloro-1-propene (1230xd) using hydrogen fluoride as a fluorinating agent, an efficient method for producing 1,2-dichloro-3,3-difluoro-1-propene (1232xd) is provided. Through this composition including 1232xd, there are also provided an environmentally friendly composition having excellent ability to dissolve various organic matters, a method for cleaning an article using the composition, a method for producing a lubricant solution using the composition, and a method for producing a component provided with a lubricant coating film.

A metal oxide catalyst, which has a bulk composition represented by formula (1) below and which is used to produce a conjugated diolefin by an oxidative dehydrogenation reaction between a monoolefin, having 4 or more carbon atoms, and molecular oxygen, wherein standard deviation obtained by dividing a ratio of Bi molar concentration relative to Mo molar concentration at the surface of a catalyst particle by a ratio of the Bi molar concentration relative to the Mo molar concentration in a catalyst bulk is 0.3 or less.
Mo.sub.12Bi.sub.pFe.sub.qA.sub.aB.sub.bC.sub.cD.sub.dE.sub.eF.sub.fO.sub.x  (1)
(In the formula, A is at least one type of element selected from the group consisting of Ni and Co, B is at least one type of element selected from among alkali metal elements, C is at least one type of element selected from the group consisting of Mg, Ca, Sr, Ba, Zn and Mn, D is at least one type of rare earth element, E is at least one type of element selected from the group consisting of Cr, In and Ga, F is at least one type of element selected from the group consisting of Si, Al, Ti and Zr, O is oxygen, p, q, a, b, c, d, e, f and x denote the number of atoms of Bi, Fe, A, B, C, D, E, F and oxygen, respectively, relative to 12 Mo atoms, and are such that 0.1≤p≤5, 0.5≤q≤8, 0≤a≤10, 0.02≤b≤2, 0≤c≤5, 0≤d≤5, 0≤e≤5 and 0≤f≤200, and x is the number of oxygen atoms required to satisfy valency requirement of other elements present.)

A metal oxide catalyst, which has a bulk composition represented by formula (1) below and which is used to produce a conjugated diolefin by an oxidative dehydrogenation reaction between a monoolefin, having 4 or more carbon atoms, and molecular oxygen, wherein standard deviation obtained by dividing a ratio of Bi molar concentration relative to Mo molar concentration at the surface of a catalyst particle by a ratio of the Bi molar concentration relative to the Mo molar concentration in a catalyst bulk is 0.3 or less.
Mo.sub.12Bi.sub.pFe.sub.qA.sub.aB.sub.bC.sub.cD.sub.dE.sub.eF.sub.fO.sub.x  (1)
(In the formula, A is at least one type of element selected from the group consisting of Ni and Co, B is at least one type of element selected from among alkali metal elements, C is at least one type of element selected from the group consisting of Mg, Ca, Sr, Ba, Zn and Mn, D is at least one type of rare earth element, E is at least one type of element selected from the group consisting of Cr, In and Ga, F is at least one type of element selected from the group consisting of Si, Al, Ti and Zr, O is oxygen, p, q, a, b, c, d, e, f and x denote the number of atoms of Bi, Fe, A, B, C, D, E, F and oxygen, respectively, relative to 12 Mo atoms, and are such that 0.1≤p≤5, 0.5≤q≤8, 0≤a≤10, 0.02≤b≤2, 0≤c≤5, 0≤d≤5, 0≤e≤5 and 0≤f≤200, and x is the number of oxygen atoms required to satisfy valency requirement of other elements present.)

Provided are monomers useful for dental materials that include a compound in which a core and a specific terminal group are bonded to each other directly or via a linking group, wherein the core is a C.sub.1-200 polyvalent organic group having a valence of not less than 3 containing an oxygen atom or a nitrogen atom in which an atom bonded to the terminal group or the linking group is the oxygen atom or the nitrogen atom; the terminal group is a specific (meth)acryloyl group-containing group, a (meth)acryloyl group, a C.sub.1-20 hydrocarbon group or a hydrogen atom, and the terminal group needs to meet specific requirements; and the linking group is a specific divalent group, and when the compound contains a plurality of linking groups, the linking groups may be the same as or different from each other. Compositions, dental materials and kits are also provided.

A method for converting an N,N-dialkylamide compound into an ester compound includes using a fourth period transition metal complex as a catalyst. The fourth period transition metal complex is obtained by a reaction of a precursor having a fourth period transition metal with a nitrogen-containing compound or a phosphorus-containing compound.

The present invention relates to: a method for converting a hydroxyl group of an alcohol; and a catalyst which makes the method possible. A method for converting a hydroxyl group of an alcohol according to the present invention is characterized by producing a compound represented by CH(R.sup.1)(R.sup.2)Nu (wherein R.sup.1, R.sup.2 and Nu are as defined below) by reacting an alcohol represented by CH(R.sup.1)(R.sup.2)OH (wherein each of R.sup.1 and R.sup.2 represents a hydrogen atom, an optionally substituted alkyl group, or the like) and a compound having an active proton, which is represented by H-Nu (wherein Nu represents a group represented by —CHX.sup.1-EWG.sup.1 or —NR.sup.3R.sup.4; X.sup.1 represents a hydrogen atom or the like; EWG.sup.1 represents an electron-withdrawing group; and each of R.sup.3 and R.sup.4 represents a hydrogen atom, an optionally substituted alkyl group, or the like), with each other in the presence of a complex of a group 7-11 metal of the periodic table and at least one solid base that is selected from the group consisting of layered double hydroxides, composite oxides and calcium hydroxide.

Provided is an organic transistor material characterized by having a trans-1,4-disubstituted cyclohexane structure derived from a compound represented by Formula (1). In Formula (1), X represents a skeleton in which plural phenylene groups or naphthylene groups are linked directly or via a vinyl group, a condensed polycyclic hydrocarbon skeleton, or a heterocyclic compound skeleton; m, n, p, and q each independently represent 0 or 1; and R1 and R2 each independently represent an alkyl group or haloalkyl group having 1 to 15 carbon atoms. This organic transistor material has high carrier mobility and excellent thermal stability.

##STR00001##

The present invention provides, for example, a compound represented by formula (1), or a salt thereof:

##STR00001##

wherein R.sup.1 to R.sup.4 are each independently an alkyl group.