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1. (WO2018138957) METHOD FOR CONTROLLING PH BY ELECTRICAL CONDUCTIVITY
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Pub. No.: WO/2018/138957 International Application No.: PCT/JP2017/033543
Publication Date: 02.08.2018 International Filing Date: 15.09.2017
IPC:
C02F 1/66 (2006.01) ,B01D 19/00 (2006.01) ,B01D 61/02 (2006.01) ,B01D 61/04 (2006.01) ,B01D 61/12 (2006.01)
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
66
by neutralisation; pH adjustment
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
19
Degasification of liquids
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
02
Reverse osmosis; Hyperfiltration
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
02
Reverse osmosis; Hyperfiltration
04
Feed pretreatment
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
02
Reverse osmosis; Hyperfiltration
12
Controlling or regulating
Applicants:
栗田工業株式会社 KURITA WATER INDUSTRIES LTD. [JP/JP]; 東京都中野区中野四丁目10番1号 10-1, Nakano 4-chome, Nakano-ku, Tokyo 1640001, JP
Inventors:
岩▲崎▼ 守 IWASAKI, Mamoru; JP
育野 望 IKUNO, Nozomu; JP
Agent:
重野 剛 SHIGENO, Tsuyoshi; JP
重野 隆之 SHIGENO, Takayuki; JP
Priority Data:
2017-01435430.01.2017JP
Title (EN) METHOD FOR CONTROLLING PH BY ELECTRICAL CONDUCTIVITY
(FR) PROCÉDÉ DE RÉGULATION DU PH PAR CONDUCTIVITÉ ÉLECTRIQUE
(JA) 電気伝導度によるpH制御方法
Abstract:
(EN) Provided is a method for controlling pH to a neutral region (pH 6-8) by adding an alkali or acid to decarbonated water, wherein the addition amount of the alkali or acid is controlled by using an electrical conductivity meter. The decarbonated water is obtained by decarbonating industrial water or underground water to have a carbonate concentration of 10 ppm or less. The method may further comprise a step for RO-treating the decarbonated water, which has been adjusted to pH 6-8 by the pH control, to produce pure water.
(FR) La présente invention concerne un procédé de régulation du pH dans une région neutre (pH 6-8) par ajout d’un alcali ou d’un acide à de l’eau décarbonatée, la quantité d’ajout de l’alcali ou de l’acide étant régulée au moyen d’un dispositif de mesure de conductivité électrique. L’eau décarbonatée est obtenue par décarbonatation d’eau industrielle ou d’eau souterraine pour obtenir une concentration en carbonate de 10 ppm ou moins. Le procédé peut comprendre en outre une étape de traitement par osmose inverse de l’eau décarbonatée, qui a été ajustée à pH 6-8 par la régulation de pH, pour produire de l’eau pure.
(JA) 脱炭酸処理水にアルカリ又は酸を添加してpHを中性領域(pH6~8)に制御する方法において、電気伝導度計を利用してアルカリ又は酸添加量を制御するpH制御方法。脱炭酸処理水は、工業用水又は地下水を炭酸濃度が10ppm以下となるように脱炭酸処理した水などである。前記pH制御によりpH6~8とされた脱炭酸水をRO処理して純水を製造する工程をさらに有してもよい。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)