The purpose of the present invention is to enable the production of 3,5-dihydroxy-4-methoxybenzyl alcohol (DHMBA), which is a novel antioxidant, from the shellfish meat of a filter-feeding bivalve other than oyster by extracting the shellfish meat of the filter-feeding bivalve under heating or pressurizing. The method according to the present invention is characterized by comprising adding the shellfish meat of a filter-feeding bivalve other than oyster to an extraction liquid and heating the extraction liquid to thereby produce 3,5-dihydroxy-4-methoxybenzyl alcohol from the thus heated shellfish meat liquid of the bivalve.

The invention relates to a two-stage method for recovering halogenated hydrocarbons. In a desorption step, steam is passed through an adsorbent comprising adsorbed halogenated hydrocarbons, which produces a secondary flow volume containing halogenated hydrocarbons. The secondary flow volume is converted into a condensate containing halogenated hydrocarbons and water by cooling, from which condensate the halogenated hydrocarbons are separated. In a sterilisation step that precedes the desorption step, the adsorbent comprising adsorbed halogenated hydrocarbons is brought into contact with steam for at least 10 minutes at a temperature of more than 120° C. and at a pressure between 0.15 MPa and 0.4 MPa.

The invention relates to a two-stage method for recovering halogenated hydrocarbons. In a desorption step, steam is passed through an adsorbent comprising adsorbed halogenated hydrocarbons, which produces a secondary flow volume containing halogenated hydrocarbons. The secondary flow volume is converted into a condensate containing halogenated hydrocarbons and water by cooling, from which condensate the halogenated hydrocarbons are separated. In a sterilisation step that precedes the desorption step, the adsorbent comprising adsorbed halogenated hydrocarbons is brought into contact with steam for at least 10 minutes at a temperature of more than 120° C. and at a pressure between 0.15 MPa and 0.4 MPa.

A production method for an organic solvent that contains less metal impurities which when manufacturing a semiconductor device. This production method passes a liquid through a filter cartridge, wherein the filter cartridge is obtained by layering types of base cloths for filtration, wherein the base cloths for filtration are nonwoven fabric obtained by chemically bonding a metal adsorption group to polyolefin fibers, the base cloths for filtration include nonwoven fabric layer A and nonwoven fabric layer B, the nonwoven fabric layer A includes polyolefin fibers to which a sulfonate group is chemically bonded as a metal adsorption group, the nonwoven fabric layer B includes polyolefin fibers bonded thereto as a metal adsorption group at least one selected from the group consisting of an amino group, an N-methyl-D-glucamine group, an iminodiacetate group, an iminodiethanol group, an amidoxime group, a phosphate group, a carboxylate group, and an ethylene diamine triacetate group.

A production method for an organic solvent that contains less metal impurities which when manufacturing a semiconductor device. This production method passes a liquid through a filter cartridge, wherein the filter cartridge is obtained by layering types of base cloths for filtration, wherein the base cloths for filtration are nonwoven fabric obtained by chemically bonding a metal adsorption group to polyolefin fibers, the base cloths for filtration include nonwoven fabric layer A and nonwoven fabric layer B, the nonwoven fabric layer A includes polyolefin fibers to which a sulfonate group is chemically bonded as a metal adsorption group, the nonwoven fabric layer B includes polyolefin fibers bonded thereto as a metal adsorption group at least one selected from the group consisting of an amino group, an N-methyl-D-glucamine group, an iminodiacetate group, an iminodiethanol group, an amidoxime group, a phosphate group, a carboxylate group, and an ethylene diamine triacetate group.

A production method for an organic solvent that contains less metal impurities which when manufacturing a semiconductor device. This production method passes a liquid through a filter cartridge, wherein the filter cartridge is obtained by layering types of base cloths for filtration, wherein the base cloths for filtration are nonwoven fabric obtained by chemically bonding a metal adsorption group to polyolefin fibers, the base cloths for filtration include nonwoven fabric layer A and nonwoven fabric layer B, the nonwoven fabric layer A includes polyolefin fibers to which a sulfonate group is chemically bonded as a metal adsorption group, the nonwoven fabric layer B includes polyolefin fibers bonded thereto as a metal adsorption group at least one selected from the group consisting of an amino group, an N-methyl-D-glucamine group, an iminodiacetate group, an iminodiethanol group, an amidoxime group, a phosphate group, a carboxylate group, and an ethylene diamine triacetate group.

A method for manufacturing 1,4-bis(4-phenoxybenzoyl)benzene, including: reacting terephthaloyl chloride with diphenyl ether in a reaction solvent and in the presence of a Lewis acid, so as to obtain a product mixture comprising a 1,4-bis(4-phenoxybenzoyl)benzene-Lewis acid complex; putting the product mixture in contact with a protic solvent, so as to obtain a first phase containing the Lewis acid and a second phase containing 1,4-bis(4-phenoxybenzoyl)benzene; subjecting at least the second phase to a solid/liquid separation step by centrifugal filtration, so as to recover solid 1,4-bis(4-phenoxybenzoyl)benzene.

A first aspect of the invention relates to a process for separating 1-methoxypropan-2-ol from an aqueous stream comprising 1-methoxypropan-2-ol and 2-methoxypropan-1-ol, wherein the process comprises providing a stream SO comprising 1-methoxypropan-2-ol, 2-methoxypropan-1-ol and water, and having a molar ratio of 1-methoxypropan-2-ol:2-methoxypropan-1-ol in the range of from 1:5 to 5:1; wherein the final stream S5 comprises 95 weight-% 1-methoxypropan-2-ol based on the total weight of S5. In a second aspect, the invention relates to 1-methoxypropan-2-ol or a mixture of 1-methoxypropan-2-ol and 2-methoxypropan-1-ol obtained or obtainable from the process of the first aspect.

A first aspect of the invention relates to a process for separating 1-methoxypropan-2-ol from an aqueous stream comprising 1-methoxypropan-2-ol and 2-methoxypropan-1-ol, wherein the process comprises providing a stream SO comprising 1-methoxypropan-2-ol, 2-methoxypropan-1-ol and water, and having a molar ratio of 1-methoxypropan-2-ol:2-methoxypropan-1-ol in the range of from 1:5 to 5:1; wherein the final stream S5 comprises 95 weight-% 1-methoxypropan-2-ol based on the total weight of S5. In a second aspect, the invention relates to 1-methoxypropan-2-ol or a mixture of 1-methoxypropan-2-ol and 2-methoxypropan-1-ol obtained or obtainable from the process of the first aspect.

The invention concerns a purification method comprising: providing a flow comprising a glycol, monovalent ions and multivalent ions; treating this flow with ion exclusion chromatography comprising: injecting the flow into a chromatographic unit comprising an ion exchange stationary phase; injecting an eluent into the chromatographic unit; collecting a fraction at the outlet of the chromatographic unit; the collected fraction being enriched with glycol and depleted of monovalent ions and multivalent ions relative to the flow. The invention also concerns an installation adapted to implement this method, and its application to the regeneration of an anti-hydrate agent.