The present invention relates to a novel process for the synthesis of 9,9-bis(hydroxymethyl)fluorene. The syntheses from fluorene to 9,9-bis(hydroxy-methyl)fluorene via a hydroxymethylation and further to 9,9-bis(methoxymethyl)-fluorene via a etherification are known. 9,9-bis(methoxymethyl)fluorene is a compound that is used as an electron donor for Ziegler-Natta catalysts. The present invention is related to an improvement in the synthesis of 9,9-bis(hydroxymethyl)fluorene leading to a decrease in the amount of solvent used and an easier work up while achieving high yield and purity.

An anti-fouling composition, and uses thereof in the industrial preparation of ethylenically unsaturated monomers comprising at least one heteroatom, such as acrylic monomers are disclosed.

An anti-fouling composition, and uses thereof in the industrial preparation of ethylenically unsaturated monomers comprising at least one heteroatom, such as acrylic monomers are disclosed.

An object of the present invention is to provide a chemical liquid purification method which makes it possible to obtain a chemical liquid having excellent defect inhibition performance. Another object of the present invention is to provide a chemical liquid. The chemical liquid purification method according to an embodiment of the present invention is a chemical liquid purification method including obtaining a chemical liquid by purifying a substance to be purified containing an organic solvent, in which a content of the stabilizer in the substance to be purified with respect to the total mass of the substance to be purified is equal to or greater than 0.1 mass ppm and less than 100 mass ppm.

Provided are purification methods, comprising: (a) providing an organic solvent and a phenolic peroxide formation inhibitor, wherein the organic solvent has a first boiling point at standard atmospheric pressure (bp.sub.1) and the phenolic peroxide formation inhibitor has a second boiling point at standard atmospheric pressure (bp.sub.2) that satisfy the following inequality (I):
bp.sub.2(1.10)(bp.sub.1)(I); and
(b) heating the organic solvent and the phenolic peroxide formation inhibitor to a temperature causing the organic solvent and phenolic peroxide formation inhibitor to vaporize, and (ii) condensing the vaporized organic solvent and peroxide formation inhibitor to provide a purified mixture of the organic solvent and peroxide formation inhibitor. The methods find particular use in the purification of solvents that are useful in process chemicals for the manufacture of semiconductor devices.

Provided are purification methods, comprising: (a) providing an organic solvent and a phenolic peroxide formation inhibitor, wherein the organic solvent has a first boiling point at standard atmospheric pressure (bp.sub.1) and the phenolic peroxide formation inhibitor has a second boiling point at standard atmospheric pressure (bp.sub.2) that satisfy the following inequality (I):
bp.sub.2(1.10)(bp.sub.1)(I); and
(b) heating the organic solvent and the phenolic peroxide formation inhibitor to a temperature causing the organic solvent and phenolic peroxide formation inhibitor to vaporize, and (ii) condensing the vaporized organic solvent and peroxide formation inhibitor to provide a purified mixture of the organic solvent and peroxide formation inhibitor. The methods find particular use in the purification of solvents that are useful in process chemicals for the manufacture of semiconductor devices.

Provided are purification methods, comprising: (a) providing an organic solvent and a phenolic peroxide formation inhibitor, wherein the organic solvent has a first boiling point at standard atmospheric pressure (bp.sub.1) and the phenolic peroxide formation inhibitor has a second boiling point at standard atmospheric pressure (bp.sub.2) that satisfy the following inequality (I):

bp.sub.2(1.10)(bp.sub.1) (I); and

(b) heating the organic solvent and the phenolic peroxide formation inhibitor to a temperature causing the organic solvent and phenolic peroxide formation inhibitor to vaporize, and (ii) condensing the vaporized organic solvent and peroxide formation inhibitor to provide a purified mixture of the organic solvent and peroxide formation inhibitor. The methods find particular use in the purification of solvents that are useful in process chemicals for the manufacture of semiconductor devices.

Provided are purification methods, comprising: (a) providing an organic solvent and a phenolic peroxide formation inhibitor, wherein the organic solvent has a first boiling point at standard atmospheric pressure (bp.sub.1) and the phenolic peroxide formation inhibitor has a second boiling point at standard atmospheric pressure (bp.sub.2) that satisfy the following inequality (I):

bp.sub.2(1.10)(bp.sub.1) (I); and

(b) heating the organic solvent and the phenolic peroxide formation inhibitor to a temperature causing the organic solvent and phenolic peroxide formation inhibitor to vaporize, and (ii) condensing the vaporized organic solvent and peroxide formation inhibitor to provide a purified mixture of the organic solvent and peroxide formation inhibitor. The methods find particular use in the purification of solvents that are useful in process chemicals for the manufacture of semiconductor devices.

The present invention relates to a novel process for the synthesis of 9,9-bis(hydroxymethyl)fluorene. The syntheses from fluorene to 9,9-bis(hydroxy-methyl)fluorene via a hydroxymethylation and further to 9,9-bis(methoxymethyl)-fluorene via a etherification are known. 9,9-bis(methoxymethyl)fluorene is a compound that is used as an electron donor for Ziegler-Natta catalysts. The present invention is related to an improvement in the synthesis of 9,9-bis(hydroxymethyl)fluorene leading to a decrease in the amount of solvent used and an easier work up while achieving high yield and purity.

The present invention relates to a novel process for the synthesis of 9,9-bis(hydroxymethyl)fluorene. The syntheses from fluorene to 9,9-bis(hydroxy-methyl)fluorene via a hydroxymethylation and further to 9,9-bis(methoxymethyl)-fluorene via a etherification are known. 9,9-bis(methoxymethyl)fluorene is a compound that is used as an electron donor for Ziegler-Natta catalysts. The present invention is related to an improvement in the synthesis of 9,9-bis(hydroxymethyl)fluorene leading to a decrease in the amount of solvent used and an easier work up while achieving high yield and purity.