The present invention relates to a process for purifying a composition comprising a hydrohalocarbon B comprising the steps of: i) providing a composition A1 comprising a hydrohalocarbon B and at least one impurity C different from said hydrohalocarbon B, ii) compressing said composition A1, and optionally cooling it, so as to obtain said hydrohalocarbon B in liquid form in order to form a liquid stream A2 comprising said hydrohalocarbon B, iii) distilling said stream A2 obtained in step ii) in order to form and recover a stream A3 comprising said hydrohalocarbon B, characterized in that step iii) is carried out in a pressurized distillation device comprising one or more rotating packed beds.

A filtering module includes at least one reinforced aluminum side plate and at least one filtering mesh. The reinforced aluminum side plate surrounds to form a rectangular frame. The reinforced aluminum side plate includes a top plate, a connecting plate, a base plate and a positioning plate. The connecting plate is connected between the top plate and the base plate. The base plate and the top plate are substantially parallel with each other. The base plate has a treated surface away from the top plate and configured to abut against a fan filtering unit. The top plate has a supporting surface away from the base plate. The positioning plate is disposed perpendicularly on the supporting plate and aligns with the connecting plate. The filtering mesh is at least partially supported on the supporting surface and at least partially abuts against the positioning plate.

Provided herein are integrated distillation apparatuses configured as stand-alone fully integrated systems having a reduced footprint. Integrated distillation apparatuses can have a rotary evaporator, a condenser, and an integrated refrigeration system or chiller, as well as an integrated water bath and vacuum pump, all of which can be integrated into a central frame and/or housing assembly. Integrated distillation apparatuses can be configured such that the rotary evaporator is movably attached to a frame structure and configured to be vertically translatable in position, whereas the condenser can be affixed to the structure by an arm extending from the structure and adjacent to the rotary evaporator, and wherein the refrigeration system can be in fluid communication with the condenser.

A multi-stage evaporation system enhanced by a gravity-reduced field consists of evaporation structures of multiple stages. There are three different operation modes, namely, a serial-connected air and parallel-connected solution mode, a serial-connected air and serial-connected solution mode, and a parallel-connected air and serial-connected solution mode. In the evaporation chambers, the solution directly contacts the air to transfer the heat and mass. The solution is sprayed on the rotating filling material, and is uniformly distributed under the action of the gravity-reduced field, which enhances the heat and mass transfer. The solution is gasified by absorbing the heat energy thereof. Meanwhile, the air can carry more water vapor after being heated by the solution and thus having an increased temperature, and take away the gasified solution, thereby achieving the purpose of evaporation.

Disclosed in the present disclosure is a method for extracting and separating various components from flaxseed meal based on a subcritical composite solvent, including the following steps: adding an extraction agent to flaxseed meal for subcritical extraction to obtain a crude flax lignan extract and crude flaxseed oil in one step, where the extraction agent includes n-butane and anhydrous ethanol at a volume ratio of 1:1; adding n-hexane to the crude flaxseed oil for fractional extraction, and conducting rotary evaporation to obtain flaxseed oil; and subjecting the flaxseed meal used to hot water extraction to obtain flaxseed gum. In the present disclosure, the subcritical composite solvent used in an extraction process can replace a large number of organic reagents used in a traditional extraction process, and has the characteristics of good solvent effect, environmental friendliness, recyclability, and low burden on the environment.

Raw plant material is mixed with ethanol under pressure to extract essential elements. The resulting crude oil and ethanol with the dissolved essential elements is separated from the raw plant material and filtered to remove particulates, waxes, lipids, fats and dissolved impurities. The ethanol is then evaporated from the resulting mixture of crude oil and ethanol, and the remaining crude oil then undergoes decarboxylation and distillation to obtain the essential elements. The ethanol may be chilled before adding it to the raw plant material.

Raw cannabis plant material is mixed with ethanol and spun-dry to extract cannabinoids. The ethanol may be chilled before adding it to the raw cannabis plant material, and a non-polar solvent stage may be used to increase the yield of the extraction. The resulting crude oil and ethanol with the dissolved cannabinoids is separated from the raw cannabis plant material and filtered to remove particulates, waxes, lipids, fats and dissolved impurities. The ethanol is then evaporated from the resulting mixture of oil and ethanol, and the remaining oil then undergoes brine-washing, decarboxylation and distillation to obtain the cannabinoids and other desirable volatile phytochemicals.

The present invention relates to a process for the vacuum purification of chemical compounds and to an apparatus for carrying out this process.

A cold trap has multiple interior spaces formed within one unit such that a vacuum pump pulls only dry air and distillate substantially fully or fully condenses and drops out of the bottom of the device. Laminar flow through a side portal is converted into turbulent flow in a cooling region around a conical cold glass or other inert protrusion. The only other portal of the cooling region is a bottom portal such that though there is vacuum suction, vapors only exit through the bottom portal after condensing and falling through an outer section while dry air is pulled upwards to an upper vacuum portal.

The present invention relates to a method of recycling mother liquid of a PTA refining unit. The present invention recycles waste heat and PT acids of a PTA mother liquid to effectively utilize heat in the PTA mother liquid, solves influence of crystallization of the PT acids on subsequent system, reduces pollution to the environment, and can produce huge economic benefits by using high efficient multistage flash distillation technology, low temperature cogeneration technology, heat pump heating and cooling technology, and low temperature crystallization technology.