Provided is a method of treating a vinyl aromatic resin (I) comprising (a) bringing the vinyl aromatic resin (I) into contact with an alcohol, and maintaining the contact between the vinyl aromatic resin (I) and the alcohol for 10 minutes or more, and (b) bringing the vinyl aromatic resin into contact with a base. wherein the vinyl aromatic resin (I), prior to steps (a) and (b), has benzyl chloride groups,
benzyl alcohol groups, and methylene bridge groups.

Provided is vinyl aromatic resin comprising benzyl alcohol groups, benzyl ether groups, and methylene bridge groups, wherein the mole ratio of the benzyl ether groups to the methylene bridge groups is from 0.002:1 to 0.1:1, wherein the vinyl aromatic resin either has no amine groups or else has amine groups in a mole ratio of the sum of all amine groups to aromatic rings of 0.1:1 or lower.

A processes for purifying glycol ethers, comprises (a) providing a glycol ether to a first vessel, the glycol ether, the glycol ether having the following formula: R.sub.1O (CHR.sub.2CHR.sub.3) O).sub.nR.sub.4; wherein R.sub.1 is an alkyl group having 1 to 9 carbon atoms or a phenyl group; wherein R.sub.2 and R.sub.3 each individually is hydrogen, a methyl group or an ethyl group, provided that when R.sub.3 is a methyl group or an ethyl group, R.sub.2 is hydrogen and provided that when R.sub.2 is a methyl group or an ethyl group, R.sub.3 is hydrogen; wherein R.sub.4 is hydrogen, an alkyl group having 1 to 4 carbon atoms, an acetyl group, or a propionyl group; and wherein n is an integer of 1 to 3; (b) filling the first vessel with inert gas; (c) heating the glycol ether in the first vessel to a sub-boiling temperature, wherein the sub-boiling temperature is at least 15? C. less than the normal boiling point of the glycol ether; (d) cooling the vapor from the first vessel in a second vessel to provide a liquid; and (e) contacting the glycol ether with a mixed bed of ion exchange resins comprising cationic exchange resins and anionic ion exchange resins.

The present invention provides novel and improved protein purification processes which incorporate certain types of carbonaceous materials and result in effective and selective removal of certain undesirable impurities without adversely affecting the yield of the desired protein product.

The present invention provides novel and improved protein purification processes which incorporate certain types of carbonaceous materials and result in effective and selective removal of certain undesirable impurities without adversely affecting the yield of the desired protein product.

Methods of stabilizing virgin ion exchange resin material are provided. The methods include rinsing virgin ion exchange resin material with deoxygenated water, introducing the rinsed virgin ion exchange resin material into a liquid impermeable compartment of a gas impermeable vessel and hermetically sealing the vessel. The methods include rinsing virgin ion exchange resin material with deoxygenated water, introducing the rinsed virgin ion exchange resin material into a gas impermeable vessel, introducing an oxygen scavenging material into the gas impermeable vessel, and hermetically sealing the vessel. A method of facilitating water treatment in a site in need thereof by providing rinsed virgin ion exchange resin material in deoxygenated water positioned in a liquid impermeable compartment of a gas impermeable vessel is also provided. A vessel containing deoxygenated water and virgin ion exchange resin material and an oxygen scavenging material is also provided.

Methods of stabilizing virgin ion exchange resin material are provided. The methods include cleansing the virgin ion exchange resin material with a preparation comprising a non-ionic detergent. The methods include cleansing the virgin ion exchange resin material with a preparation comprising an alcohol solvent. The methods include rinsing virgin ion exchange resin material with deoxygenated water, the methods include introducing the cleansed/rinsed virgin ion exchange resin material into a gas impermeable vessel and hermetically sealing the vessel. The methods include introducing an oxygen scavenging material into the gas impermeable vessel, and hermetically sealing the vessel. A method of facilitating water treatment in a site in need thereof by providing a cleansed virgin ion exchange resin material in deoxygenated water is also disclosed.

The present invention relates to recovery of lithium from liquid resources to produce lithium solutions while limiting impurity precipitation in the lithium solutions.

The present invention relates to recovery of lithium from liquid resources to produce lithium solutions while limiting impurity precipitation in the lithium solutions.

A method of removing colloidal cobalt from an aqueous composition comprising bringing the aqueous composition into contact with a vinyl aromatic resin, wherein the vinyl aromatic resin comprises benzyl alcohol groups, benzyl ether groups, and methylene bridge groups, wherein the vinyl aromatic resin has a chlorine content, by weight based on the weight of resin, of 10,000 ppm or less.