Abstract: Embodiments may include methods and systems for purifying a product and recovering a solvent. In a first stage, a raw feed comprising an initial solvent fraction and an initial product fraction may be heated using a first heat exchanger, and an intermediate vapor fraction of the initial solvent fraction may be vaporized using a first vapor liquid separator to yield an intermediate product comprising intermediate solvent and intermediate product fractions. The intermediate vapor fraction may be condensed to a first solvent condensate using a first condenser. In a second stage, the intermediate product may be heated using a second heat exchanger, and a final vapor fraction of the intermediate solvent fraction may be vaporized using a second vapor liquid separator to yield a purified product comprising final solvent and final product fractions. The final vapor fraction may be condensed to a second solvent condensate using a second condenser.

Abstract: A jewelry ring configuration having interchangeable elements and especially jewelry rings which have a decorative feature mounted on a center ring. This new device/process may be simply described as a device for an interlocking ring system and device with interchangeable outer jackets and center rings comprised with a center ring, ornate and decorative or smooth and with or without gemstones, the center ring in various mounting styles such as prong, bezel, pave etc.; and a jacket as an outer band, held together by one or more straps, the jacket being ornate and with or without gemstones and made of the same, complimentary or contrasting materials as the center ring wherein the interchangeable outer jackets and center rings provide an interchangeable, stylish combination of interlocking jackets and center rings.

Abstract: A jewelry ring configuration having interchangeable elements and especially jewelry rings which have a decorative feature mounted on a center ring. This new device/process may be simply described as a device for an interlocking ring system and device with interchangeable outer jackets and center rings comprised with a center ring, ornate and decorative or smooth and with or without gemstones, the center ring in various mounting styles such as prong, bezel, pave etc.; and a jacket as an outer band, held together by one or more straps, the jacket being ornate and with or without gemstones and made of the same, complimentary or contrasting materials as the center ring wherein the interchangeable outer jackets and center rings provide an interchangeable, stylish combination of interlocking jackets and center rings.