The present invention aims at providing a method for producing a high-concentration alcohol from a water-alcohol mixture, in which the overall process is efficient and the present invention relates to a production method of a high-concentration alcohol, including a water adsorption step of adsorbing water of a water-alcohol mixture on an adsorption column to obtain a first concentrated alcohol, a water desorption step of introducing an alcohol to obtain a hydrous alcohol, and a membrane separation step of introducing the hydrous alcohol into a membrane separation unit provided with a membrane composite containing zeolite having an SiO.sub.2/Al.sub.2O.sub.3 molar ratio of 5 to 15 to obtain a second concentrated alcohol.

The present invention aims at providing a method for producing a high-concentration alcohol from a water-alcohol mixture, in which the overall process is efficient and the present invention relates to a production method of a high-concentration alcohol, including a water adsorption step of adsorbing water of a water-alcohol mixture on an adsorption column to obtain a first concentrated alcohol, a water desorption step of introducing an alcohol to obtain a hydrous alcohol, and a membrane separation step of introducing the hydrous alcohol into a membrane separation unit provided with a membrane composite containing zeolite having an SiO.sub.2/Al.sub.2O.sub.3 molar ratio of 5 to 15 to obtain a second concentrated alcohol.

Provided is a method of producing piperylene from a hydrocarbon mixture derived from a petroleum fraction having a carbon number of 5. The hydrocarbon mixture has a piperylene proportional content of not less than 60 mass % and not more than 80 mass % and has a cyclic hydrocarbon proportional content of not less than 20 mass % and not more than 40 mass %. The method of producing piperylene includes a membrane separation step of performing membrane separation of the hydrocarbon mixture using a zeolite membrane to obtain a separated product in which piperylene is enriched.

A method and system is provided for treating waste generated from manufacturing operations including at least one of Printed Circuit Boards Fabrication (PCB FAB), General Metal Finishing (GMF), semiconductors manufacturing, chemical milling, and Physical Vapour Deposition (PVD). The method and system are used to create zero liquid discharge recycling.

An integrated, membrane-based process to produce purified water and conversion of salt to high value chemicals from oil and gas well produced water is described. A liquid stream including water and dissolved salt is flowed through pretreatment units and one or more desalination and concentration units which remove at least a portion of the water to form a brine enriched in dissolved salt. The purified high-density brine may be subjected to electrically-enforced salt dissociation techniques to produce chemicals from oil and gas produced water.

An apparatus, system, and method to purify produced water from a wellbore using heat energy recovery. The apparatus comprises a wellbore with a wellhead attached to the wellbore; at least one energy recapture device connected to the wellhead of the wellbore with produced water, wherein the at least one energy recapture device captures heat energy of the production fluids including produced water, and at least one distillation device connected to a heat recovery device wherein the at least one distillation device uses at least a portion of the energy from the heat energy recovery device to heat a volume of the produced water in the distillation device to remove contaminants from the produced water to create purified water. The method comprises steps to use the apparatus and the system comprises a control panel that operates at least one energy recapture device.

A system and method for increasing the water production efficiency of a desalination plant and producing concentrated calcium and magnesium is provided. A saline source water is preferably subjected to a first treatment such a passage through a first desalination unit, followed by dual treatment of the first treatment reject stream using physicochemical adsorption and electrodialysis to remove scale-forming calcium and magnesium. The reject stream from the dual treatment may then be received by a second desalination unit. Due to the removal of the majority of the saline source water's scale-forming minerals, the second desalination unit may be operated at higher operating limits than in conventional desalination units without significant concern for fouling due to scaling. The approach of the present system and method efficiently increases the fresh water production ratio from the source saline water while generating commercially attractive concentrated calcium and magnesium products.

The invention relates to a process for preparing carboxylic acids or salts thereof by hydrolysis or saponification of an ester, which is obtained by alkoxycarbonylation of a C2 to C20 hydrocarbon having at least one multiple bond, preferably having at least one olefinic double bond, in which the homogeneous catalyst system used is separated from the product mixture by means of membrane separation. In a development of the present invention, the ester thus formed is converted into another ester by transesterification and then hydrolyzed or saponified.

The present disclosure provides processes and systems for dehydrating a byproduct stream in ethanol production. In one embodiment, a feed mixture is distilled with one or more distillation units to remove at least a portion of the water, and form a first byproduct stream. The first byproduct stream is contacted with a molecular sieve unit, thereby forming a product stream. The molecular sieve unit is cyclically contacted with at least a portion of the product stream to regenerate the molecular sieve unit and form one or more regenerate streams. A second byproduct stream including at least one of (1) the regenerate streams and (2) at least a portion of the fusel oil stream is contacted with a separation system, thereby forming a permeate and a retentate. At least a portion of the retentate is forwarded into the product stream.

Embodiments of the present disclosure include a system for optimizing dirty water remediation and re-use. The system can include a first treatment system that includes a direct contact thermal distillation system or an evaporator. The system can further include a frac water re-use treatment system.