Title:
WET-PROCESS PHOSPHORIC ACID SCALE-DISSOLVING AGENT, PREPARATION METHOD THEREFOR, AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/074005
Kind Code:
A1
Abstract:
The present application provides a wet-process phosphoric acid scale-dissolving agent, a preparation method therefor, and use thereof, and relates to the technical field of scale prevention. The wet-process phosphoric acid scale-dissolving agent of the present application comprises the following components in percentage by weight: 5%-15% of a descaling agent, 8%-13% of a dispersing agent, 0.5%-1% of a permeating agent, 0.1%-0.5% of a corrosion inhibitor, 0.3%-0.8% of a surfactant, and the balance of water. The descaling agent is sulfamate. The dispersing agent is a mixture of polyepoxysuccinic acid, polyaspartic acid and an acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer. According to the present application, the specific descaling agent, the dispersing agent, the permeating agent, the corrosion inhibitor and the surfactant are used and compounded, such that potassium fluosilicate, sodium silicofluoride, calcium sulfate and other scaling substances generated in the wet-process phosphoric acid production process are efficiently dissolved and removed, the dissolution rate of the scaling substances is greater than or equal to 45% at the time of 0.5 h, and the dissolution rate of the scaling substances is greater than or equal to 80% at the time of 4 h.
Inventors:
CAO LONG (CN)
LI CHANGDONG (CN)
RUAN DINGSHAN (CN)
WANG WEI (CN)
ZHENG HAIYANG (CN)
YANG JIE (CN)
LI CHANGDONG (CN)
RUAN DINGSHAN (CN)
WANG WEI (CN)
ZHENG HAIYANG (CN)
YANG JIE (CN)
Application Number:
PCT/CN2023/077170
Publication Date:
April 11, 2024
Filing Date:
February 20, 2023
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
International Classes:
C01B25/22; B08B9/027; B08B9/032
Domestic Patent References:
| WO2004072327A1 | 2004-08-26 |
Foreign References:
| CN115571863A | 2023-01-06 | |||
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| CN102583792A | 2012-07-18 | |||
| CN109012211A | 2018-12-18 | |||
| CN112725813A | 2021-04-30 | |||
| CN111003822A | 2020-04-14 | |||
| CN101967024A | 2011-02-09 | |||
| CN113912195A | 2022-01-11 | |||
| CN108083457A | 2018-05-29 |
Attorney, Agent or Firm:
BEIJING YZH IP FIRM et al. (CN)
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