Nippon Shokubai Co., Ltd.

Norton Company

Nippon Shokubai Kagaku Kogyo Co., Ltd.

Yukio Kadono

Yoshiyuki Onda

Kenji Rakutani

Yoshiaki Urano

Hideaki Tsuneki

Masaru Kirishiki

Kunihiko Kimata

Takakiyo Goto

Toru Inaoka

Minoru Saotome

Fumio Watanabe

Fumiaki Morishita

Isamu Maeda

Kenji Muraoka

Takahiko Nakai

Minoru Miyagawa

Toshiaki Saito

Yasuhiko Satoh

High-purity alkanolamines, whose iron content is less than 50 ppb, are provided. Said high-purity alkanolamines can be produced by covering with an alkanolamine-resistant material at least a part of the inner wall of equipment that contacts alkanolamines from the top of the distillation tower to the storage tank in producing a high-purity alkanolamine from a crude alkanolamine by using distillation towers.

High-purity alkanolamines and their production process

The present invention provides a process for producing a (poly)alkylene glycol monoalkyl ether with high selectivity and high yield. In this process, the (poly)alkylene glycol monoalkyl ether is produced by reacting an olefin and a (poly)alkylene glycol in the presence of a catalyst, wherein: 1) a crystalline metallosilicate is used as the catalyst, and at least a portion of the used catalyst is regenerated, and the regenerated catalyst is recycled as the catalyst for the reaction; or 2) the reaction between the olefin and the (poly)alkylene glycol is carried out in the presence of either or both of a (poly)alkylene glycol dialkyl ether and an alcohol.

Production process for (poly)alkylene glycol monoalkyl ether

Higher secondary alcohol alkoxylate compound composition, method for production thereof, and detergent and emulsifier using the composition

A (poly)alkylene glycol higher alkyl ether derivative composition characterized by comprising 30-90 mol. % of (B1) (poly)alkylene glycol higher alkyl ether derivative and 70-10 mol. % of (B2) (poly)alkylene glycol higher alkyl ether derivative, respectively having a methyl group for R,and an alkyl group of not less than two carbon atoms for R,in the general formula (1) representing the derivatives:

(Poly)alkylene glycol higher alkyl ether derivative composition and detergent, lubricant, and dermatologic medicine for external use containing the composition

A higher secondary alcohol alkoxylate compound composition represented by the general formula (1):

A higher secondary alcohol alkoxylate compound composition represented by the general formula (1): ##STR1## [wherein R.sup.1 and R.sup.2 represent an alkyl group provided that the total number of carbon atoms of R.sup.1 and R.sup.2 is in the range of 7 to 29 and the number of carbon atom of R.sup.2 is not less than that of R.sup.1 (the number of carbon atom of R.sub.1 .ltoreq.the number of carbon atom of R.sub.2), A represents a lower alkylene group, n represents a numeral in the range of 1 to 50 on the average; providing that when n is not less than 2, the number of species of oxyalkylene group represented by AO may be either one or two or more, and that when the oxyalkyl groups have two or more species, all the oxyalkylene groups are present in the average of n, and B represents a hydrogen atom or SO.sub.3 M (wherein M represents an alkali metal atom, an alkaline earth metal atom, an ammonium group or a substituted ammonium group)], wherein the composition comprises 30 to 90 mol % of the higher secondary alcohol alkoxylate compound (X) having a methyl group for R.sup.1 and 70 to 10 mol % of the higher secondary alcohol alkoxylate compound (Y) having an alkyl group of 2 or more carbon atoms for R.sup.1, a method for the production thereof, and a detergent and an emulsifier using the composition.

Higher secondary alcohol alkoxylate compound composition, method for

There is provided a process for producing a (poly)alkylene glycol monoalkyl ether from an olefin and a (poly)alkylene glycol at a high conversion at a high selectivity. This process comprises reacting an olefin with a (poly)alkylene glycol in the presence of a crystalline metallosilicate as a catalyst.

Process for production of (poly) alkylene glycol monoalkyl ether

Process for producing aminocarboxylic acid salt

Process for producing aminocarboxylic acid salts

A method for the production of a 1,3-dioxolane represented by the general formula III: ##STR1## wherein R.sup.1 is hydrogen atom or an alkyl group of 1 to 5 carbon atoms and R.sup.2 is hydrogen atom or an alkyl group of 1 to 2 carbon atoms or a phenyl group, which method comprises reacting an aldehyde represented by the general formula I ##STR2## wherein R.sup.1 has the same meaning as defined above, with an alkylene oxide represented by the general formul II: ##STR3## wherein R.sup.2 has the same meaning as defined above, in an alkylene glycol solvent corresponding to said alkylene oxide in the presence of at least one catalyst selected from the group consisting of bromides of alkali metals, iodides of alkali metals, bromides of alkaline earth metals, and iodides of alkaline earth metals.

Method for production of 1,3-dioxolanes

The present invention discloses an acid gas absorbent composition, comprising a diethylene glycol dialkyl ether represented by the general formula I:

Acid gas absorbent composition

Diisopropyl ethers of oligomers of ethylene glycol having between 2 and 8 ethylene glycol moieties and an average molecular weight between 190 and 300, are more useful physical absorption solvents for the separation of acid gases than are dimethyl, diethyl, ethyl butyl, propyl butyl, dibutyl, or higher alkyl ethers of the same ethylene glycol oligomers, because of a combination of high solution capacity, high separation efficiencies, low viscosity, low gas pressure, and resistance to hydrolysis during use. The diisopropyl ether of diethylene glycol is especially advantageous for use at absorber temperatures below 0.degree. C. Because of low viscosity, the diisopropyl ethers can often be substituted in separation equipment designed for use with chemical rather than physical solvents, thereby realizing the lower operating costs associated with physical solvents without requiring new capital investment.

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Yokohama, Japan

Yukio Kadono