The present invention relates to a process for producing olefins, including the step of subjecting an alcohol having not less than 8 and not more than 22 carbon atoms to dehydration reaction in the presence of a solid acid catalyst, in which the solid acid catalyst includes aluminum oxide and an oxide of an element having an electronegativity higher than that of aluminum which is supported on the aluminum oxide.

The present invention relates to compounds of formula (I) wherein X is N or P; SO.sub.3 is OS(O).sub.2 or S(O).sub.2O; and n and R.sup.1 to R.sup.5 are defined below, and to their use as additives for electrolyte compositions, in particular in electrolyte compositions for lithium batteries. ##STR00001##

The present invention relates to compounds of formula (I) wherein X is N or P; SO.sub.3 is OS(O).sub.2 or S(O).sub.2O; and n and R.sup.1 to R.sup.5 are defined below, and to their use as additives for electrolyte compositions, in particular in electrolyte compositions for lithium batteries. ##STR00001##

A sulfonium salt containing an acid-eliminatable substituent group which is effective for improving contrast is highly soluble and uniformly dispersible. A resist composition comprising the sulfonium salt as photoacid generator forms a pattern with a high resolution, rectangularity, and reduced LWR.

A sulfonium salt containing an acid-eliminatable substituent group which is effective for improving contrast is highly soluble and uniformly dispersible. A resist composition comprising the sulfonium salt as photoacid generator forms a pattern with a high resolution, rectangularity, and reduced LWR.

Provided are an internal olefin sulfonate composition which is capable of sufficiently enhancing foamability, foam spreadability, and foam dissipation property, and a cleansing composition containing the same. The internal olefin sulfonate composition comprises (A) an internal olefin sulfonate having 16 carbon atoms and (B) an internal olefin sulfonate having 14 carbon atoms, wherein a content mass ratio of the component (A) to the component (B), (A/B), is from 10/90 to 70/30, and a content of the internal olefin sulfonate having 18 or more carbon atoms is 5% by mass or less.

Provided are an internal olefin sulfonate composition which is capable of sufficiently enhancing foamability, foam spreadability, and foam dissipation property, and a cleansing composition containing the same. The internal olefin sulfonate composition comprises (A) an internal olefin sulfonate having 16 carbon atoms and (B) an internal olefin sulfonate having 14 carbon atoms, wherein a content mass ratio of the component (A) to the component (B), (A/B), is from 10/90 to 70/30, and a content of the internal olefin sulfonate having 18 or more carbon atoms is 5% by mass or less.

Provided are an internal olefin sulfonate composition which is capable of sufficiently enhancing foamability, foam lubricity and volume of foam, and a cleansing composition containing the same. The internal olefin sulfonate composition comprises (A) an internal olefin sulfonate having 16 carbon atoms and (B) an internal olefin sulfonate having 14 carbon atoms, in which a content mass ratio of the component (A) to the component (B), (A/B), is from 80/20 to 90/10.

Provided are an internal olefin sulfonate composition which is capable of sufficiently enhancing foamability, foam lubricity and volume of foam, and a cleansing composition containing the same. The internal olefin sulfonate composition comprises (A) an internal olefin sulfonate having 16 carbon atoms and (B) an internal olefin sulfonate having 14 carbon atoms, in which a content mass ratio of the component (A) to the component (B), (A/B), is from 80/20 to 90/10.

Provided are an internal olefin sulfonate composition which is capable of sufficiently enhancing foamability, foam dissipation property free from a slimy feeling during rinsing, and a feel after cleansing and subsequent drying, and a cleansing composition containing the same.

The internal olefin sulfonate composition comprises (A) an internal olefin sulfonate having 16 carbon atoms and (B) an internal olefin sulfonate having 12 carbon atoms, in which a content mass ratio of the component (A) to the component (B), (A/B), is from 10/90 to 90/10.