A solvent recovery system allows for a continuous recovery of ethanol, alcohol, or other solvent from an oil/material feed. The solvent recovery system includes a feed pump, a primary condenser, a heating system, an evaporator, a discharge pump, and a control system. The feed pump is used to drive a fluid which can be retrieved from an oil/material feed. The primary condenser is a device able to condense the fluid from a gas to liquid state through a cooling method. The heating system includes devices able to heat the fluid in order to prepare the fluid to change into a gas state. The evaporator is a device able to process the fluid from a liquid to gas state. The discharge pump is used to output ethanol, alcohol, or other solvent, recovered from the fluid. The control system allows a user manually or electronically manage and control the solvent recovery system.

A solvent recovery system allows for a continuous recovery of ethanol, alcohol, or other solvent from an oil/material feed. The solvent recovery system includes a feed pump, a primary condenser, a heating system, an evaporator, a discharge pump, and a control system. The feed pump is used to drive a fluid which can be retrieved from an oil/material feed. The primary condenser is a device able to condense the fluid from a gas to liquid state through a cooling method. The heating system includes devices able to heat the fluid in order to prepare the fluid to change into a gas state. The evaporator is a device able to process the fluid from a liquid to gas state. The discharge pump is used to output ethanol, alcohol, or other solvent, recovered from the fluid. The control system allows a user manually or electronically manage and control the solvent recovery system.

The present invention discloses a gradient sub-boiling distiller and a distillation method. The gradient sub-boiling distiller includes a condensation pipe, an evaporation surface, a heating device, a liquid distributor, a tail liquid trough, a condensate trough, a tail liquid pipe, a liquid inlet pipe, a condensate pipe, and a shell. A raw material liquid is preheated through the condensation pipe, flows down from the evaporation surface after being further preheated in the heating device, and is continuously evaporated. With the temperature continuously decreasing, vapor condenses on the surface of the condensation pipe, the heat of condensation preheats the raw material liquid in the condensation pipe, and the flow direction of the raw material liquid in the condensation pipe is opposite to that on the evaporation surface. The present invention completely recovers the heat of condensation, increases the energy efficiency, reduces water for water-cooling, saves water resources and reduces energy consumption.

The invention relates to a heat transfer tube (9) for falling film evaporation having a heating medium surface (21) to be heated by a heating medium, a falling film surface (20) to have spent liquor passing over it, and being made from an sheet metal material. The falling film surface of the heat transfer tube is equipped with a multitude of wire bumps (WB), each wire bump being spaced apart along the longitudinal axis (CC) of the heat transfer tube from a neighbouring wire bump by 3-300 mm, said wire bumps (WB) having a height (h) in the range 0.3 to 5.0 mm, a width (w) in the range 0.3-5.0 mm, and an inclination angle (a) versus a plane orthogonal to a longitudinal axis (CC) of the heat transfer tube in a range of 0-70 degrees. The invention also relates to a method for manufacturing said heat transfer tube.

A levulinic acid composition A having: a. at least 95 wt. % of levulinic acid; b. between 5 wppm and 5000 wppm of formic acid; and c. less than 1000 wppm of angelica lactone, based on the total weight of the composition. A process for the isolation of a levulinic acid composition, having the following steps: a. performing acid catalyzed hydrolysis of a C6 carbohydrate-containing feedstock to obtain reaction product X, b. subjecting of reaction product X to solid-liquid separation to provide a composition 1, c. feeding composition 1 to at least two purification steps to treat composition 1 to obtain a levulinic acid composition, wherein a second or a further purification step is a melt crystallization step.

The present invention relates to a distributor device (10000) for the even distribution of a fluid (10) into 2 or more fluid streams each containing gas (11) and liquid (12), with a falling film evaporator (100000), in which the distributor device according to the invention serves to distribute the 2 or more fluid streams onto the heating pipes of the evaporator, and to the use of the distributor device (10000) according to the invention and in particular the falling film evaporator (100000) according to the invention in the production and/or preparation of chemical products. The distributor device according to the invention is characterized, in particular, by a swirl breaker (600) for the gas phase (11) which arises from separating the fluid (10) into a gas phase (11) and a liquid phase (12) within the distributor device.

The invention relates to a heat transfer tube (9) for falling film evaporation having a heating medium surface (21) to be heated by a heating medium, a falling film surface (20) to have spent liquor passing over it, and being made from an iron based high alloy stainless steel material with an alloy content above 16.00% for Chromium and above 1% for Nickel. The falling film surface of the heat transfer tube is equipped with one or several protrusions/indentations forming a multitude of stamped bumps (SB) on the envelope surface of a heat transfer tube such that the distance between adjacent stamped bumps (SB) along a line on the envelope surface parallel to the longitudinal axis of the heat transfer tube is within the range of 3 to 250 mm, said stamped bumps (SB) having a height (hp) in the range 0.3 to 5.0 mm, a width (wp) in the range 1.0-20 mm, and an inclination angle (a) versus a plane orthogonal to a longitudinal axis (CC) of the heat transfer tube in a range of 0-70 degrees so that each stamped bump (SB) is inclined and extends along at least a portion of the heat transfer tube or extend within a plane orthogonal to the longitudinal axis of the heat transfer tube. The invention also relates to a method for manufacturing said heat transfer tube.

A process is disclosed for fractionating biomass-based material. The process includes evaporating an evaporable part of biomass-based material in a short path evaporator, SPE, to produce a depitched lights fraction in liquid form, and a heavier pitch fraction. The depitched lights fraction may contain depitched tall oil in liquid form, and the heavier pitch fraction may contain tall oil pitch, TOP.

A stacked type falling film evaporator includes a first evaporator, a second evaporator, a first vapor recovering device, a second vapor recovering device and a vapor recompressor. The first evaporator and the second evaporator respectively have evaporation tubes of a length of 5 m to 10 m, and are stacked in such a manner that wastewater passes through the first evaporator and the second evaporator in order. The first vapor recovering device collects vapor generated from the wastewater in the first evaporator and supplies the collected vapor to the second evaporator. The second vapor recovering device collects vapor generated from the wastewater in the second evaporator and supplies the collected vapor to the first evaporator. The vapor recompressor compresses the vapor collected in the second vapor recovering device before the vapor is supplied to the first evaporator.

The present invention describes a tall diesel composition obtainable from a crude tall oil, said tall diesel composition comprising carboxylic acids in a range of 50-98 wt % and neutral components in a range of 2-50 wt %, wherein the tall diesel composition comprises 1-20 wt % rosin acids, 6-35 wt % saturated fatty acids and 59-74 wt % unsaturated fatty acids.