Daicel Chemical Industries, Ltd.

Kuraray Co., Ltd.

Yoshiyuki Harano

Takaaki Fujiwa

Shin Takemoto

Tomohisa Isobe

Sozo Namai

Takaaki Murai

Hidehiko Nakajima

Shoji Watanabe

Yoshiaki Morimoto

Manabu Yamada

Katsuyuki Maeda

Katsuyki Maeda

A method comprises continuously supplying an alcohol to a pressurized reaction system, pressurizing carbon monoxide with a compressorattached to a first feed line, for continuously supplying carbon monoxide to the reaction system via a second feed linewith a reference flow rate F, and converging excess carbon monoxide in the reaction system in the first feed line via a branched circulation linefor allowing to react alcohol with carbon monoxide. The reference flow rate F in the second feed lineis a total rate of a reference consumption flow rate Fcs in the reaction and a flow rate Fin excess rate over a fluctuation consumption flow rate &#x394;Fcv in the reaction system (F=Fcs+F, F&#x3e;&#x394;Fcv). According to the pressure fluctuation of the gaseous phase in the reaction system, the flow rate in the circulation lineis controlled to a flow rate Fr=F&#x2212;&#x394;Fcv and the feed flow rate in the first feed lineis controlled to a flow rate Fsu=Fcs+&#x394;Fcv, for compensating a consumption rate variation in the reaction system with the feed flow rate of carbon monoxide. This ensures discharge inhibition of the gaseous reactant in a liquid phase pressurized reaction system (such as carbonylation reaction system) and effective utilization of the reactant for the reaction.

Method and apparatus for controlling feed of gaseous reaction component

While supplying methanol and carbon monoxide via feed linesand, respectively, to a liquid phase reaction systemincluding a carbonylation catalytic system, and maintaining a substantially constant liquid level of the reaction system, part of the reaction mixture containing the produced acetic acid is drawn out from the reaction system and supplied to a flash distillation column, and the high boiling point component, which contains the carbonylation catalytic system that has been separated by ths flash distillation, is circulated to the reaction systemby means of a circulation line. At circulation line, the flow rate is detected by a flow rate sensor Fand the temperature is detected by a temperature sensor T, and based on the detection data, a control unitis used to control the temperature of the circulated high boiling point component by means of a temperature regulating unitand thereby to suppress temperature and pressure fluctuations of the above-mentioned reaction system.

Method for controlling reaction and controlling apparatus

In a process for producing acetic anhydride and acetic acid by reacting methanol and methyl acetate, optionally together with dimethyl ether, with carbon monoxide, acetic anhydride and acetic acid are effectively produced with the use of a sequence of production facilities by carrying out separation of low-boiling point fraction mainly consisting of methyl iodide, methyl acetate and dimethyl ether with the use of at least two distillation zones, separating catalyst drops entrained from the vapor-liquid separation zone in at least one distillation zone and further by controlling the pressurization of the vapor-liquid separation zone and the above distillation zones under 5 bar to a pressure greater than atmospheric pressure. The invention not only reduces the facility cost and the energy cost to be borne for separation, but also improves the capability of recovering low-boiling point fractions and further recovers the entrained catalyst, so that acetic anhydride and acetic acid can efficiently be produced with the use of a sequence of production facilities.

Process for producing acetic anhydride and acetic acid

Compositions (I), (II) and (III) comprising compounds having vinyl groups as side chains and epoxidized compositions (XI), (XII) and (XIII) thereof, which can be prepared by the various reaction combinations of (a) with (b) or (b)+(c), and or (d), where

Compositions, epoxized compositions, a heat curable resin composition,

Compositions(I), (II) and (III) comprising compounds having vinyl groups as side chains and epoxidized compositions(XI), (XII) and (XIII) thereof, which can be prepared by the various reaction combinations of (a) with (b) or (b)+(c), and or (d), where (a) is at least one compound having at least one vinyl group and one epoxy group in the molecule; (b) is at least one of a polybasic compound, an anhydride thereof, a polymer having carboxylic groups at terminals and a polymer having carboxylic groups as side chains; (c) is at least one organic compound having at least one active hydrogen atom; and (d) is at least one of an unsaturated monocarboxylic compound or an unsaturated monocarboxylic ester having a hydroxyl group.

Disclosed are a composition and a process for preparation thereof, which composition comprises a novel alicyclic compound and an epoxidized compound thereof represented respectively by formulae (I) and (II) ##STR1## wherein Y.sup.1 represents at least one of the structural groups ##STR2## Y.sup.2 represents at least one of the the structural groups ##STR3## R.sup.a and R.sup.b each represent hydrogen or a methyl group, m represents a natural number of from 1 to 7, and n represents a natural number of from 1 to 20. The composition (II) is a multi-functional alicyclic epoxidized compound, which has a property of being high in epoxy group density in a molecule compared with alicyclic conventional epoxy resins, which can provide resins having wide range properties from being hard to being soft.

Composition comprising novel alicyclic compound, process for preparation

A composition comprising a lactone-modified alicyclic compound (I), or an epoxidized lactone-modified alicyclic compound (II) of the following formulae: ##STR1## wherein R is an alkyl group, an aromatic group or an alkenyl group having carbon number of from 1 to 30, Y.sup.1 is at least one of the structural groups; ##STR2## Y.sup.2 is at least one of the structural group; ##STR3## X is the structural group; ##STR4## and R.sup.a and R.sup.b each independently is hydrogen or a methyl group, c and c' represent a number of from 4 to 8, from n1 to nL represents 0 or a number of more than 0, respectively, and n1+n2+n3+ . . . +nL corresponds to the total mole numbers of a lactone introduced into one molecule. These compositions can be made into a heat-curable composition, a photo-curable composition, a polymerizable composition and another photo-curable composition.

Lactone-modified alicyclic composition and an epoxidized composition

A composition comprising alicyclic polyether compounds represented by the formula (I): ##STR1## containing structural units A having an ether bond derived from an alicyclic epoxy group and one (meth)acrylic group, and n is an integer of from 1 to 100, R.sup.1 is a radical of an organic compound having L active hydrogens or HO--, from n1 to nL is an integer of from 1 to 100, respectively, the total is 1 to 100, L is an integer of from 1 to 100, which is the number of active hydrogen in said organic compound. Curable resin compositions can be prepared by the addition of a photo-polymerizable initiator.

Composition comprising polyether compounds, a process for the

A composition comprising a lactone-modified alicyclic compound (I), or an epoxidized lactone-modified alicyclic compound (II) of the following formulae: ##STR1## wherein R is an alkyl group, an aromatic group or an alkenyl group having carbon number of from 1 to 30, Y.sup.1 is at least one of the structural groups; ##STR2## Y.sup.2 is at least one of the structural group; ##STR3## X is the structural group; ##STR4## R.sup.a and R.sup.b each independently is hydrogen or a methyl group, c and c' represent a number of from 4 to 8, from n1 to nL represents 0 or a number of more than 0, respectively, and n1+n2+n3+. . . +nL corresponds to the total mole numbers of a lactone introduced into one molecule. These compositions can be made into a heat-curable composition, a photo-curable composition, a polymerizable composition and another photo-curable composition.

A composition comprising a lactone-modified alicyclic compound (I), or an epoxidized lactone-modified alicyclic compound (II) of the following formulae: ##STR1## wherein R is an alkyl group, an aromatic group or an alkenyl group having carbon number of from 1 to 30, Y.sup.1 is at least one of the structural groups; ##STR2## Y.sup.2 is at least one of the structural group; ##STR3## X is the structural group; ##STR4## R.sup.4 and R.sup.b each independently is hydrogen or a methyl group, c and c' represent a number of from 4 to 8, from n1 to nL represents 0 or a number of more than 0, respectively, and n1+n2+n3+. . . +nL corresponds to the total mole numbers of a lactone introduced into one molecule. These compositions can be made into a heat-curable composition, a photo-curable composition, a polymerizable composition and another photo-curable composition.

A process is disclosed for obtaining butanediols by distilling the same from an aqueous solution obtained by hydrogenation, carried out in the presence of a nickel catalyst, of a hydroformylated allyl alcohol. The invention process is characterized in that 2-methyl-1,3-propanediol, 1,4-butanediol and a high-boiling fraction are separated by distillation from a butanediol mixture obtained using the following steps:

Growing community of inventors

Otake, Japan

Yoshiyuki Harano