Mitsubishi Chemical Corporation

Integratto Inc.

Komatsu Corporation

Yasushi Ogawa

Shuhei Yada

Yoshiro Suzuki

Kenji Takasaki

Kimikatsu Jinno

Hirochika Hosaka

Masayasu Goriki

Kiyoshi Takahashi

Yasuyuki Sakakura

Yukihiro Hasegawa

Yasuhiko Samura

Mitsuo Nakamura

Tomohiro Takano

Noboru Nishimura

Risa Katayama

Takeshi Kabata

Masakazu Katou

An object of the present invention is to provide a method for producing an unsaturated carboxylic ester, wherein the risk of polymerization blockage is reduced and the required equipment cost and workload involved are kept low while maintaining a high conversion rate in an esterification reaction of unsaturated carboxylic acid. This object can be achieved by a method for producing an unsaturated carboxylic ester, which includes performing an esterification reaction using a reactor packed with a solid catalyst, wherein unsaturated carboxylic acid and alcohol are continuously fed to the reactor from an inlet thereof to form a fluid of the reaction solution in the reactor, and the vaporized organic solvent is continuously fed to the reactor from the inlet or a part near the inlet of the reactor.

Method for producing unsaturated carboxylic ester

To improve a future prediction simulation technology in order to more accurately predict the future by enabling a mathematics expression and an operand numerical value to be appropriately corrected, a server executes, as a future prediction simulation apparatus, a future prediction simulation by using mathematics expression data and operand numerical data for specifying a mathematics expression and an operand numerical value, which are recorded in a server recorder and which are to be used in the future prediction simulation. The server includes an interpreting unit, a related information collecting unit, and a determining unit. The interpreting unit reads from the server recorder basis data, which is text data for specifying the basis used by the user to determine the mathematics expression and the operand numerical value, and generates interpretation data. The related information collecting unit collects related information related to the basis data by crawling the Internet using the interpretation data. When related information is found, the determining unit generates alert data.

Future prediction simulation apparatus, method, and computer program

An object of the present invention is to provide a separation method capable of efficiently separating a light liquid and a heavy liquid from a mixed liquid containing the light liquid, the heavy liquid, and an emulsion liquid of the light liquid and the heavy liquid, such as an emulsion-layer extraction liquid in a vicinity of an interface in an extraction column. The present invention relates to a separation method for continuously separating a light liquid and a heavy liquid having a specific gravity larger than that of the light liquid from a mixed liquid containing the light liquid, the heavy liquid, and an emulsion liquid of the light liquid and the heavy liquid by introducing the mixed liquid into a separation tank, in which a specific separation layer is used for the separation tank.

Separation method, and production method for (meth)acrylate

Using a vertical multi-tube heat exchanger which includes a tubular body, an upper tube plate and a lower tube plate, a plurality of heat transfer tubes, and lid sections and in which the distillation gas introduced into a receiving chamber is cooled in the course of passing through the heat transfer tube and turns into a condensate, a solution containing polymerization inhibitor is introduced into the receiving chamber. Some of the plurality of heat transfer tubes have an upper end protruding above the upper tube plate, with the remainings being not protruding, and the solution containing polymerization inhibitor coming into contact with the distillation gas in the receiving chamber forms a liquid flow layer with a predetermined liquid depth on the upper tube plate.

Production method for (meth)acrylic acid or ester thereof

The present invention relates to an acrylic acid production equipment which includes a raw material gasification apparatus for converting liquefied propylene into a propylene gas; an oxidation reaction apparatus for converting the propylene gas into crude acrylic acid; and a purification apparatus for converting the crude acrylic acid into acrylic acid, wherein the raw material gasification apparatus includes a heating apparatus in the inside thereof and also includes a heating apparatus in the periphery including at least a bottom of the raw material gasification apparatus, by which not only energy can be effectively utilized, but also it is possible to achieve a stopping operation efficiently and within a short time.

Acrylic acid production equipment, method for producing acrylic acid, and method for stopping production of acrylic acid in said method for producing acrylic acid

In a conventional quantitative plan simulation, it is practically impossible to prepare a spreadsheet-type data input template applicable to all types of plans. Thus, a quantitative plan simulation system is required to handle a plurality of spreadsheets containing variously-formatted data. Therefore, the present invention provides a simulation system, a simulation method and a simulation program which are configured to extract a numerical value, a mathematical formula or other kinds of data necessary for a quantitative plan simulation, based on a relevancy among numerical values and mathematical formulas or other kinds of data in a spreadsheet, and perform the quantitative plan simulation based on the extracted numerical values and mathematical formulas.

Simulation system, simulation method, and simulation program

A dump truck has a the holding mechanism that is provided at a lower part of a king pin and that is for holding the suspension arm from below, and the holding mechanism includes: a snap ring protruded from an outer peripheral surface of the king pin and disposed in a peripheral direction of the king pin; a bolt attached detachably at a lower end of the king pin; and a holder fixed to the king pin by the bolt and having a supported surface opposed to the snap ring from above and along the peripheral direction.

Dump truck

An object of the present invention is to provide a method in which, when a steam ejector is used as a decompression apparatus for a vacuum distillation process for an easily polymerizable compound, the steam ejector is prevented from being occluded due to polymerization of the easily polymerizable compound. Another object of the present invention is to provide a method for manufacturing an acrylic acid that is an easily polymerizable compound, using the above-described method. The above object is accomplished by a method for manufacturing an acrylic acid, which comprises a step of executing vacuum distillation, using a steam ejector, on an acrylic acid resulting from gas-phase catalytic oxidation using propane, propylene, or acrolein as a material, wherein the vacuum distillation step includes a step of heating an outer surface of the steam ejector.

Vacuum distillation method for easily polymerizable compound and method for producing acrylic acid

The present invention provides a method for efficiently using an aqueous solution of (meth)acrylic acid at a low concentration formed in a production/storage step of (meth)acrylic acid. In the present invention, a (meth)acrylic acid derivative is produced by using as a raw material an aqueous solution of (meth)acrylic acid formed by one or both of: a device which reduces a pressure of a gas comprising (meth)acrylic acid in production of (meth)acrylic acid; and a device which collects (meth)acrylic acid from a gas comprising (meth)acrylic acid.

Method for producing (meth) acrylic acid derivitive

A condenser includes: a top face of a tube plate on which acrylic acid may be condensed inside the condenser; a spray for spreading a polymerization inhibitor on the tube plate; a first polymerization inhibitor supply tube for supplying the polymerization inhibitor to the spray; and a supporter for supporting the spray at a predetermined position. The supporter supports the first polymerization inhibitor supply tube outside the condenser. The condenser allows a stable continuous operation for a long period of time by preventing polymerization of an easily polymerizable compound in the condenser into which a vapor of an easily polymerizable compound is supplied with a simple structure thereof.

Handling device and producing system of easy-to-polymerize compound

A method of storing (meth)acrylate in a tank of a less expensive and highly versatile material without losing stability of the stored (meth)acrylate. To be specific, a method of storing (meth)acrylate in a tank, including supplying an appropriate gas for storing (meth)acrylate into the tank, in which: the tank is made of a carbon steel material; the gas has a water concentration of 100 ppm or less; and the (meth)acrylate has a (meth)acrylic acid concentration of 30 ppm or less.

Method of storing (meth)acrylic ester

(Meth)acrolein or (meth)acrylic acid is collected by bringing a reaction gas () containing (meth)acrolein or (meth)acrylic acid obtained through a vapor-phase catalytic oxidation reaction into contact with an aqueous solution as a collecting solvent in a collecting tower main body (). The reaction gas () is supplied to the collecting tower main body () from two nozzles () facing each other, and is caused to collide in the collecting tower main body (). According to the present invention, (meth)acrolein or (meth)acrylic acid can be efficiently collected from a gas containing (meth)acrolein or (meth)acrylic acid while preventing polymerization.

Method for collecting (meth)acrolein or (meth)acrylic acid and collecting device for the same

A producing method of (meth)acrolein or (meth)acrylic acid where by use of a multi-tubular reactor that has a plurality of reaction tubes filled with a catalyst, catalytic gas phase oxidation of propylene, propane, isobutylene or (meth)acrolein is carried out in the presence of a composite oxide catalyst by use of molecular oxygen or a gas containing molecular oxygen, in which method (meth)acrolein or (meth)acrylic acid can be obtained stably in high yield for a long period of time without allowing the activity of the catalyst to decrease locally (disproportionately) and extremely. A temperature difference between a temperature of a heat medium at the beginning of operation and a peak temperature of the catalyst is set in a range of 20 to 80&#xb0; C., and during operations a change of the peak temperature T of the catalyst in a tube axis direction is maintained in a definite range.

Process for producing (meth)acrylic acid or (meth)acrolein

The object of this invention is to provide a method of maintaining a multi-tubular reactor which can ensure the uniformity of states of reaction in the reaction tubes in the multi-tubular reactor. This invention is a method of maintaining a multi-tubular reactor in good condition by selecting a part of reaction tubes in a multi-tubular reactor at random, measuring a differential pressure occurring in each reaction tube when passing gas therethrough, separating any reaction tube showing an abnormal differential pressure as compared with the average of differential pressures in reaction tubes packed with an fresh catalyst of the same kind, giving adequate treatment to the separated reaction tube and returning it into the reactor with any other selected reaction tube falling within a normal range.

Method of maintaining a multitubular reactor

An object of the invention is to provide a production method for (meth)acrolein or (meth)acrylic acid which can continue an operation without causing a decomposition reaction of acrolein or the like. According to the invention, provided is a production method for (meth)acrolein or (meth)acrylic acid, in which (meth)acrolein or (meth) acrylic acid is obtained by performing a catalytic gas phase oxidation on propylene, propane or isobutylene by using oxygen by means of a heat-exchange type multi-tubular reactor, having a tube bundle portion in which a multiple of reaction tubes each filled with a catalyst are aligned in parallel to one another and a tube plate which is adjacent to a downstream side of the tube bundle portion of the reaction tubes and forms a lead-out portion for a reaction gas, in which the tube bundle portion of the reaction tubes has a hollow-columnar constitution as a whole, and which is characterized in that a rectifier is provided on a tube plate.

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Yokkaichi, Japan

Yasushi Ogawa