CN102225770B

CN102225770B - The method of wet method Effect of Catalysis In Petrochemistry agent dedicated water glass

Info

Publication number: CN102225770B
Application number: CN201110070397.8A
Authority: CN
Inventors: 张振慧; 张兴海; 张新洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-23
Filing date: 2011-03-23
Publication date: 2015-08-19
Anticipated expiration: 2031-03-23
Also published as: CN102225770A

Abstract

The invention discloses the method for wet production high-modulus sodium silicate, particularly produce the method for Effect of Catalysis In Petrochemistry agent dedicated water glass, solve the disadvantage that wet method can not produce high-modulus sodium silicate, solve a difficult problem for the sad filter of high-modulus sodium silicate solution, compared with dry production, reduction mark coal 70KG per ton, reducing emission of carbon dioxide 0.7 ~ 0.8 ton, has obvious economic benefit and social benefit.

Description

The method of wet method Effect of Catalysis In Petrochemistry agent dedicated water glass

1, technical field

The present invention relates to the method that wet method manufactures Effect of Catalysis In Petrochemistry agent dedicated water glass, also can be applicable to produce common high-modulus sodium silicate, belong to the improvement of inorganic silicon compound water glass production method.

2, background technology

Water glass has another name called water glass, production method has dry method and wet method, dry method uses soda ash and quartz sand, or sodium sulfate, coal dust and quartz sand react and makes water soda glass body under the high temperature of 1350 DEG C ~ 1450 DEG C, then under saturated vapor pressure, are hydrolyzed into solution.High-modulus sodium silicate soltion viscosity is large, and specific filtration resistance is more difficult, can only allow natural subsidence impurity, and need the clarification of long period just to obtain qualified product, dry production energy consumption is high, and environmental pollution is serious.

Wet method reacts under the saturated vapor pressure of 170 DEG C ~ 200 DEG C with caustic soda and quartz sand to produce sodium silicate solution, but can only produce the sodium silicate solution of low modulus.Chinese patent 871046229 discloses the method for wet method high-modulus sodium silicate, this method is that low modulus water glass and sulfuric acid reaction are produced jelly, aging through 10 ~ 15 hours gels, then wash with water to neutrality, again 50 DEG C ~ 70 DEG C dry moisture content 1 ~ 2 hour, obtain the silicon-dioxide jelly of moisture 75 ~ 85%, then heighten the modulus reconcentration of low modulus water glass with silicon-dioxide jelly.This method is complicated, and the cycle is oversize, and equipment is many, without practicality.Chinese patent 200410059199.1 discloses the method that high-modulus sodium silicate is produced in liquid phase method less energy-consumption, solve the disadvantage that wet method can not produce high-modulus sodium silicate, but the high-modulus sodium silicate of general purposes can only be produced, because viscosity is large, there is no effective filter method, also can only natural subsidence impurity, and the modification of crystalline silica also be unable to do without high-temperature roasting furnace.

Effect of Catalysis In Petrochemistry agent dedicated water glass belongs to extraordinary water glass, very high to specification of quality, modulus is between 3.1 ~ 3.4, especially require also tighter than Standard to impurity, Fe (iron)≤0.007%, water-insoluble≤0.002% (GB: Fe≤0.02%, water-insoluble≤0.2%).The main method of producing this water glass at present is both at home and abroad dry production, and energy consumption is high, and environmental pollution is serious, because modulus is high, viscosity is large, there is no effective filtration way, main by nature clarification removal of impurities, the shortcomings such as lifetime is long, and contain container is many, and floor space is large.

3, summary of the invention

The invention provides a kind of method of wet method Effect of Catalysis In Petrochemistry agent dedicated water glass, with solving the defects such as above-mentioned dry production energy consumption is high, pollution weighs, can not filter.It is characterized in that with wet production low modulus sodium silicate solution, modulus is less than 3, and generally between 2.6 ~ 2.8, Be 42 ~ 45 °, react with mineral acid (sulfuric acid or hydrochloric acid), produce silicate hydrate, the major ingredient of silicate hydrate is SiO ₂, it forms available mSiO ₂.nH ₂o represents, as H ₂siO ₃, H ₄siO ₄, H ₄si ₃o ₈deng, water insoluble, be dissolved in alkali and generate water glass.With silicate hydrate modulation low modulus sodium silicate solution after filtering, low modulus water glass viscosity is low, even if concentration height also easily filters, makes it modulus and brings up to 3.1 ~ 3.4, this addresses the problem the filtration problem of high-module, its chemical equation:

Na ₂O.mSiO ₂+H ₂SO ₄+nH ₂O→mSiO ₂.(n+1)H ₂O↓+Na ₂SO ₄

Na ₂O.2.8SiO ₂+0.5SiO ₂H ₂O→Na ₂O.3.3SiO ₂H ₂O

Silicate hydrate produce 1, the preparation of silicon sol: get the hydrochloric acid of 31% to Be ' 8 ° ~ 18 °, by 45 °, the water glass of 2.8 moduluses is diluted to Be ' 10 ~ 12 °, and that then blows slowly adds in hydrochloric acid soln, and under agitation control PH makes colloidal sol below 3.5.2, precipitin reaction: in a kettle. water is heated to 80-100 DEG C, under agitation adds silicon sol and sodium silicate solution, control PH < 7, the SiO of white ₂make precipitation, more just obtain silicate hydrate slip through acidifying is aging.For obtaining the higher filter cake of solid content, slip adds the polyethylene oxide solutions of 5/1000000ths before press filtration.

Slip is press-filtered out saliferous mother liquor filter cake through pressure filter, and through tap water to neutral, and by potassium bichromate, silver nitrate solution checks chlorine root.

Cake moisture after washing and filter pressing about 60%, can directly add in filtered low modulus sodium silicate solution, the filter cake amount that should add by mode transfer formulae discovery, if low modulus sodium silicate solution is 2.8M Be ' 45 °, SiO ₂27%, Na ₂o10% is transferred to 3.3MBe ' 32 °. calculates containing SiO ₂the filter cake amount of 40% moisture 60%, should add the SiO of 100% ₂=[(3.3/2.8) × 0.27-0.27] × 100%=4.82%, because containing SiO in filter cake ₂40% so should add filter cake amount is that 4.82%/0.4=12.05%. is diluted to Be ' 32 ° by Be ' 45 ° and should adds water as (d ₁-d ₂)/(d ₂-1) × 1=(1.45-1.28)/(1.28-1)=0.607 ¹/ M ³, it is 0.418 ton of-0.12 × 60%=0.346 that Be ' per ton 45 ° should add water as 0.607/1.45=0.418/ ton deducts moisture of filter cake _t/ ton.

The present invention compared with prior art, not only solve producing high-modulus sodium silicate by adopting liquid phase, and solve the filtration problem of high-modulus sodium silicate, can realize producing final product on the same day same day, reduce finished product storage vessel and place, save facility investment, compared with dry production, reduction mark coal 70KG per ton, reduces the discharge of 0.7 ~ 0.8 ton of carbonic acid gas, has obvious economic benefit and social environment benefit.

Embodiment 1, production Effect of Catalysis In Petrochemistry agent dedicated water glass 3.3M, Be ' 32 °.

1, adopt purity quartzite and sodium hydroxide, Fe < 0.02% is raw material, by known technology wet production 2.8M, Be ' 45 ° of sodium silicate solutions, filters for subsequent use at 80 ~ 100 DEG C through plate-and-frame filter press.

2, produce the preparation of silicate hydrate A, silicon sol with 2.8M sodium silicate solution, get in silicon sol reactor 1.5 tons of hydrochloric acid to Be ' 8 ° under agitation, slowly add the sodium silicate solution of Be ' 10 °, below control PH3.5 prevents the generation of jelly.B, in silicate hydrate stillpot, add suitable quantity of water and be heated to 80 ~ 100C and under agitation add silicon sol solution and sodium silicate solution.Control PH < 7 now namely the silicate hydrate of adularescent separate out, slip is after acidifying is aging and add polyethylene oxide solutions.C, slip extrude saliferous mother liquor through pressure filter, then with clear water washing to neutral, and check chlorine root with 5% potassium bichromate solution and silver nitrate solution.Be the silicate hydrate of moisture 60%.

3, furnishing Effect of Catalysis In Petrochemistry agent dedicated water glass: by 2.8M, the sour sodium furnishing 3.3M of Be ' 45 °, Be ' 32 ° pumps into and infuse clearly transparent 2.8M after press filtration in mode transfer number tank, the sodium silicate solution that Be ' is 45 ° 30 tons, the silicic acid that should add moisture 60% is as calculated { [(3.3/2.8) × 0.27-0.27]/0.4} × 30=3.62 ton, should add water=[(1.45-1.28)/(1.28-1))]/1.45} × 30-3.62 × 60%=10.4 ton, the temperature of 80 ~ 100 DEG C is maintained in mode transfer tank, under agitation add silicate hydrate filter cake and water stir 5-10 minute Effect of Catalysis In Petrochemistry agent dedicated water glass.

Embodiment 2

Produce 3.3M, Be ' 38 ° sodium silicate solution

1, adopt purity quartzite and sodium hydroxide, Fe < 0.02% is raw material, infuses transparent sodium silicate solution for subsequent use by known technology wet production 2.6M, Be ' 45 ° of sodium silicate solutions at 80 ~ 100 DEG C through Filter Press Cheng Qing.

2, with 2.6M, Be ' 45 ° of sodium silicate solutions prepare the preparation of silicate hydrate A, silicon sol, get in silicon sol reactor 1.5 tons of hydrochloric acid to Be ' 18 ° under agitation, slowly add the sodium silicate solution of Be ' 10 °, below control PH3.5 prevents the generation of jelly.B, in silicate hydrate stillpot, add suitable quantity of water and be heated to 80 ~ 100 DEG C, under agitation add silicon sol solution and sodium silicate solution, control PH < 7 now namely the silicate hydrate of adularescent separate out, slip is after acidifying is aging and add polyethylene oxide solutions.C slip extrudes saliferous mother liquor through pressure filter, then with clear water washing to neutral, and with 5% potassium bichromate solution and silver nitrate solution inspection chlorine root, be the silicate hydrate of moisture 60%.

3, pump in mode transfer number tank infuse clearly transparent 2.6M after press filtration, the sodium silicate solution that Be ' is 45 ° 30 tons, the silicic acid that should add moisture 60% is as calculated { [(3.3/2.6) × 0.25-0.25]/0.4} × 30=5.05 ton, should add water=[(1.45-1.36)/(1.36-1))]/1.45 × 30-5.05 × 60%=2.14 ton, maintain the temperature of 80 ~ 100 DEG C in mode transfer tank, under agitation add silicate hydrate filter cake and water stir 5-10 minute Effect of Catalysis In Petrochemistry agent dedicated water glass.

Claims

1. the method for wet method Effect of Catalysis In Petrochemistry agent dedicated water glass, is characterized in that: described method steps is as follows

A, use purity quartzite and high-quality caustic soda, Fe < 0.02% is raw material, and wet production goes out 2.8M, and Be ' 45 ° of sodium silicate solutions also filter for subsequent use through plate-and-frame filter press at 80 ~ 100 DEG C;

B, in silicon sol reactor, get 1.5 tons of hydrochloric acid to Be ' 8 °, in silicon sol reactor, under agitation slowly add the sodium silicate solution of Be ' 10 °, control ph prevents the generation of jelly from obtaining silicon sol below 3.5;

C, in silicate hydrate stillpot, add suitable quantity of water and be heated to 80-100 DEG C, under agitation add sodium silicate solution that step a obtains and the obtained silicon sol of step b and regulate pH < 7, making silicate hydrate slurry;

D, that silicate hydrate slurry is carried out acidifying is aging, then adds polyethylene oxide solutions again and processes;

E, the silicate hydrate slurry after steps d process is extruded saliferous mother liquor through pressure filter;

F, again with clear water washing to neutral, and with 5% potassium bichromate solution and silver nitrate solution check chlorine root, obtain the silicate hydrate of moisture 60%;

G, in mode transfer tank, pump into the obtained 2.8M of a step, the sodium silicate solution that Be ' is 45 ° 30 tons, the temperature of 80 ~ 100 DEG C is maintained in mode transfer tank, under agitation add silicate hydrate 3.62 tons and 10.4 tons, the water stir and make 3.3M in 5-10 minute, the Effect of Catalysis In Petrochemistry agent dedicated water glass of Be ' 32 ° of moisture 60%.