Merck Patent Gmbh

Julien Gross

Ichiro Kano

Pascal Rajagopalan

Yves Gaignet

Julien Bole

Yann Ratieuville

Gabriela Dima

Pierre Caruso

Andrej Grabowski

The present invention relates to a method for producing purified water comprising a step (a) of passing water through a mixed bed ion exchanger comprising beads having a diameter between 0.2 and 0.7 mm and a step (b) of passing water through a fibrous ion-exchange material. The invention further relates to a module comprising the mixed bed ion exchange resin and the fibrous material and to a water treatment system for producing ultrapure water comprising the mixed bed ion exchange resin and the fibrous material.

Method for producing ultrapure water

A device for measuring the total organic carbon content (TOC) of a sample fluid comprises a measuring cell () defining a volume () for containing a sample fluid and an excimer lamp () arranged to cause an oxidation reaction of the sample fluid by emitting radiation onto the sample fluid in the volume (). A pair of electrodes is arranged to measure the conductivity of the sample fluid during the oxidation reaction and at least one temperature senor () is arranged on the measuring cell () to measure a temperature that is related to the sample fluid. The total organic carbon content (TOC) of the sample fluid is determined on the basis of the measured conductivity compensated by the temperature related to the sample fluid.

Device and method for measuring the total organic carbon content of a sample fluid

A flow-through fluid purification device (), which comprises a container () arranged such that fluid to be purified can flow-through a volume () of the container () from an inlet () to an outlet (), a receptacle () for accommodating a radiation source in the form of a lamp (), wherein the receptacle () has an interface wall () permeable for radiation with a wavelength in the UV-range, preferably between 150 nm and 200 nm, more preferably of 172&#xb1;8 nm, and arranged to let radiation pass into the volume () of the container (), a plurality of baffle plates () located in the volume () of the container () with an inter-baffle distance (D) in the flow direction from the inlet () to the outlet (), wherein the baffle plates () are arranged to force the fluid flowing from the inlet () to the outlet () to flow substantially along the interface wall () and through gaps (G) between the interface wall () and the baffle plates () defining the shortest distance between the interface wall () and the baffle plates (), and wherein the baffle plates () each have a surface on the upstream side in the flow direction which is perpendicular to the interface wall ().

Flow-through fluid purification device and means for accommodating a radiation source

A biocidal fluid purification cap () for a fluid container (), preferably one storing purified water for use in laboratory environments and especially purified water for cell culture and water for molecular biology. The purification cap () includes a cap body () including an engagement feature () for removably attaching the cap body () to a mating engagement feature on a spout of the fluid container () to hermetically close a spout opening, at least one LED () adapted to emit light in the UV-C range, electronic circuitry () for driving the LED(s) (), and a power supply for the electronic circuitry (). The LED(s) () is/are arranged in said cap body () so as to be separated from the environment by an UV-transparent window () provided in the cap body () such that light emitted from said LED(s) () enters the opening of the spout when the cap () is attached to the spout of the container ().

Biocidal purification device

A biocidal purification reactor, including a main cylinder tube (A;B), at least one end cap (A,B,C) closing at least one axial end opening of the main cylinder tube (A;B), at least two ports (A,B) communicating with the interior volume () of the main cylinder tube (A;B) in the vicinity of the respective axial ends of the cylinder tube (A;B), and at least one of said end caps (A) or said main cylinder tube (B) including a UV-light source (A;B).

Biocidal purification reactor

The present invention relates to an improved electrodeionization (EDI) module and apparatus adapted to transfer ions present in a liquid under the influence of an electric field.

Growing community of inventors

Elancourt, France

Julien Gross