The invention discloses a cleaning agent for flue dust scale on the surface of a gas heat exchanger of a gas desulfurization system and a preparation method thereof The cleaning agent is characterized by comprising the following components in percentage by mass: 5 to 25 percent of main cleaning agent, 3 to 15 percent of auxiliary cleaning agent, 2 to 10 percent of release agent, 2 to 8 percent of corrosion inhibitor, and the balance water, wherein the main cleaning agent is one or two of nitric acid, hydrochloric acid and sulfuric acid; the auxiliary cleaning agent is more than one of methanoic acid, acetic acid, ethylene diamine tetraacetic acid, sulfamic acid, glycollic acid, oxalic acid and hydroxyethylidene diphosphonic acid; the release agent is one of dodecyl dimethyl benzyl ammonium bromide, dodecyl dimethyl benzyl ammonium chloride and distearyl dimethyl ammonium chloride; and the corrosion inhibitor is pickling inhibitor The cleaning agent can realize online cleaning at normal temperature, complete scale removal, short cleaning time, lower cleaning cost and no corrosion to enamel on the surface of a heat exchange element

Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof

The invention provides a developing bath cleaning agent used for a manufacture procedure of PCB. Compared with the prior art, cleaning effect of original developing bath cleaning agent is greatly improved, COD value is reduced through the improvement of the developing bath cleaning agent, cleaning time is shortened by 3-4 hours, cleaning efficiency is improved, cleaning cost is reduced, and an enterprise thus obtains great market competitive advantages.

Developing bath cleaning agent used for manufacture procedure of PCB

The invention discloses a cleaning agent for a ceramic filtering plate. The cleaning agent comprises following components in parts by weight: 0.001-0.01 part of hexamethylenetetramine, 0.005-0.05 part of an oxidant, 0.55-2.6 parts of an acidity regulating agent, 0.5-5 parts of an auxiliary agent, 0.1-3.8 parts of a main agent A and 0.5-2 parts of a main agent B, wherein the auxiliary agent is composed of one or more of soluble nitrate and chloride; the main agent A is composed of one or more of soluble fluoride, fluosilicic acid and fluosilicate; the main agent B is soluble acetate. The cleaning agent disclosed by the invention comprises the main agent A and the main agent B; the polyacrylamides flocculating agent in micro-pores of a filtering plate is scattered by the main agent A and the solubility equilibrium is changed; the polyacrylamides flocculating agent is accelerated to be dissolved so as to realize the washing aim.

Cleaning agent aiming at ceramic filtering plate blocked by polyacrylamides flocculating agent

The invention discloses a biofouling cleanser and an application thereof and belongs to the field of chemical descaling The biofouling cleanser includes the following components, by mass, 4-8% of hydrochloric acid, 05-1% of hydrofluoric acid, 08-12% of a compound of methyl pentynol and Mannich base, 25-35% of ferric chloride, 08-12% of 2-iodacyl benzoic acid, 05-12% of heptadecenyl imidazoline quaternary ammonium salt, 03-06% of hydroxyphosphonoacetic acid, and the balanced being water The biofouling cleanser has excellent descaling effects and controls the overflow concentration of H2S to be less than 02 mg/m without aggravation on oxidizing corrosion and generation of heavy metal pollution The biofouling cleanser is safe and environment-friendly and is beneficial to safety production in oil fields

Biofouling cleanser and application thereof

A method for clean a black edge of an aluminum nitride ceramic substrate for packaging a rail transit chip comprise placing an aluminum nitride ceramic substrate at 40 DEG C, and cleaning that aluminum nitride ceramic substrate at 40 DEG C, wherein the aluminum nitride ceramic substrate is cleaned at 40 DEG C, wherein the aluminum nitride ceramic substrate is clean at 40 DEG C, and the aluminum nitride substrate is cleaned at 40 DEG C. Ultrasonic washing in pure water at 70 DEG C for 1-3min; Put the washed aluminum nitride ceramic substrate into the cleaning solution, and continue ultrasonic 1-3h, the solution temperature is 40 DEG C-60 DEG C; placing the cleaned aluminum nitride ceramic substrate in a 5-10% sodium carbonate solution for ultrasonic risining for 1 to 3 minutes,, washing with clean water for 1-2min; The aluminum nitride ceramic substrate was placed in one or more solutions of acetone, butyl acetate and alcohol to ultrasound 10-30 min, after that ultrasound is finished, take out, and drying at low temperature of 50 DEG C. The invention can effectively clean the black edge of the aluminum nitride ceramic substrate caused by the laser, and does not damage the surface ofthe aluminum nitride ceramic substrate.

A black edge cleaning method of aluminum nitride ceramic substrate for rail transit chip packaging

This invention relates to a washing agent used in rinsing ceramic strainer plate. According to the weight percentage, it contains the following materials: nitric acid 0.1~5%; hydrochloric acid 0.1~5%; hydrofluoric acid 0.2~3%; oxalic acid 0.1~5%. By the combined action of nitric acid, hydrochloric acid and hydrofluoric acid, it can deal with the mixed dirt such as carbonate, silicate, sulphate, phosphate, sulphide and hydroxid, and so on. The washing effectiveness is good and the scope of application is extensive. Otherwise, it can enhance the operating life of strainer plate and can extend the serviceable range of ceramic filtering machine.

Jing Gong

Papers

Detergent for cleaning ceramic filtering plate