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Water Treatment Patent

Water treatment agent and water treatment method for a boiler


A water treatment agent for boilers which comprises as active ingredients a compound which can release aliphatic hydroxycarboxylic acid ions in water and a polyamine represented by the following formula (I) or an acid addition product thereof: (wherein n denotes an integer of 2 to 5), and a water treatment method for pure water boilers or soft boilers using the above active ingredients to prevent corrosion of the ferrous metal in the water system of the pure water boilers or soft water boilers.

Method of detecting the initial concentration of a water-treatment chemical in a diluted aqueous system


A method of detecting the initial concentration of a water-treatment chemical present in a diluted aqueous system, by (1) incorporating into the aqueous system, a mixture including a known amount of the active ingredient and a known amount of an ultra-violet sensitive compound having the formula (I): ##STR1## wherein halogen is chlorine or bromine; X is ##STR2## and a and b, independently are 0 or 1; M is hydrogen or an alkaline metal ion; and (2) detecting the concentration of the compound of formula I, by exposing to ultra-violet light a sample of the aqueous system so treated.

High efficiency water treatment system

A system for treating a portion of water passing through a pressurized water conduit. The system comprises water treatment means such as a reverse osmosis module. An upstream branch line communicates between the pressurized water conduit and the inlet of the water treatment means. Another branch line is provided for connection with pressurized water conduit at a location downstream from the upstream branch line, and communicating with a water outlet of the treatment means. A flow restrictor is provided, positioned in the pressurized water conduit between the conduit connection locations of the respective branch lines. Thus, water can flow through the upstream branch line from the conduit to the water treatment means, and water can flow from the treatment means through the other downstream branch line back to the conduit when water is flowing through the pressurized water conduit.


Method and apparatus for controlling concentration of water treatment chemicals
Electrolysis based water treatment
Point-of use water treatment system
On premise water treatment system and method
Risers for a waste water treatment facility
Water treatment method and apparatus
System for controlling water treatment based on plankton monitoring
Water treatment agent and water treatment method for a boiler
Reactor and heat exchanger system for cyanide waste water treatment
Control system for meter actuated regeneration in a water treatment system
Water treatment unit and equipment having the unit
In-home water treatment system
Ballast water treatment systems including related apparatus and methods
Urban runoff water treatment methods and systems
Waste water treatment device

351 5169563 Water treatment agent and water treatment method for a boiler
352 5166074 Method of detecting the initial concentration of a water-treatment chemical in a diluted aqueous system
353 5160608 High efficiency water treatment system
354 5160395 Method of manufacturing biological water treatment contact material
355 5137644 Pipe connection system for multiple water treatment filters
356 5128035 Fluid flow control device for water treatment systems
357 5120661 Method for detection and quantitative analysis for water treatment chemicals
358 5114571 Water treatment system
359 5112483 Slow sand/nanofiltration water treatment system
360 5106496 Treatment of volatile organic substances at waste water treatment plants
361 5096577 Floating aquatic plant water treatment system
362 5094734 Water treatment unit
363 5089145 Water treatment apparatus and method
364 5087377 High pressure oxygen-saturated water-treatment
365 5085831 Apparatus for continually and automatically measuring the level of a water treatment product in boiler feedwater
366 5084165 Water treatment apparatus
367 5073269 Preparation of water-soluble copolymers of maleic acid and use thereof as water treatment agents
368 5073255 Water treatment apparatus
369 5069779 Water treatment system
370 5066393 Slotted flow collector/distributor for water treatment tank with one-way valves
371 5061634 Method for continually and automatically measuring the level of a water treatment product in boiler feedwater
372 5061372 Water treatment system with preservice rinse
373 5060167 Electronic programmable water treatment controller
374 5059316 Water treatment device
375 5055189 Apparatus for water treatment using a magnetic field and far infrared rays
376 5055183 Water treatment device
377 5049266 Device and method for microbiological water treatment
378 5045213 Waste water treatment method and apparatus
379 5037688 Material for protecting a slope surface and for water treatment and contact purposes
380 5006240 Water-treatment system
381 4999116 Waste water treatment method
382 4997563 Water treatment cartridge with foam and granular material
383 4990245 Sequence controller system for regenerating water treatment units
384 4979654 Cap for use with water treatment apparatus
385 4978447 Self-propelled apparatus for cleaning a water treatment tank
386 RE33487 Water treatment and soil testing
387 4966705 Waste water treatment plant and process
388 4961860 Method of water treatment
389 4956080 High pressure oxygen-saturated water treatment apparatus
390 4952290 Waste water treatment and recovery system
391 4946590 Clamp-on magnetic water treatment device
392 4923629 Method and flocculant for water treatment
393 4923599 Waste water treatment apparatus
394 4921604 Upflow biological reator waste water treatment system
395 4921598 Selector valve, especially a central control valve for a water treatment device
396 4915884 Process for production of granular material for water treatment
397 4895648 Filter cover for a purification insert in a water treatment device with a hollow tube
398 4894162 Treatment of volatile organic substances at waste water treatment plants
399 4888113 Magnetic water treatment device
400 4880547 Methods for water treatment

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