diff --git a/changelog.txt b/changelog.txt
index 83e73e4..5fc39af 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -7,6 +7,8 @@ Date: 13.4.2022
   Changes:
     - Overhaul mode is now off by default to prevent sync issues
     - made early game techs towards ass. machine 2 cheaper to improve early game
+    - added prerequisite for fi advanced purification tech
+    - unused crusher recipes are now hidden
 
   Bugfixes:
     - temporary fix for multiplayer GUI handling by x2605
diff --git a/data.lua b/data.lua
index cc39776..fbae7f5 100644
--- a/data.lua
+++ b/data.lua
@@ -84,6 +84,13 @@ table.insert(data.raw.technology["advanced-oil-processing"].effects, {
     recipe = 'el_kerosene_recipe',
 })
 
+--add kerosene and desulfurized kerosene to flame thrower
+if data.raw["fluid-turret"]["flamethrower-turret"] then
+    table.insert(data.raw["fluid-turret"]["flamethrower-turret"].attack_parameters.fluids, {type = "el_kerosene", damage_modifier = 1})
+    table.insert(data.raw["fluid-turret"]["flamethrower-turret"].attack_parameters.fluids, {type = "el_desulfurized_kerosene", damage_modifier = 1})
+end
+
+
 --booktorio
 if mods["Booktorio"] then
     require('bk_sprites')
diff --git a/locale/en/lang_en.cfg b/locale/en/lang_en.cfg
index 808a333..31e5473 100644
--- a/locale/en/lang_en.cfg
+++ b/locale/en/lang_en.cfg
@@ -194,6 +194,7 @@ fi_arc_glass=Molten industrial glass
 fi_arc_gold=Molten gold
 fi_arc_titan=Molten titan
 fi_arc_neodym=Molten neodymium
+fi_acid_water=Acid gas
 
 
 fu_hydrogen=Hydrogen
@@ -318,7 +319,7 @@ fi_robo_charger_entity=Charging station
 fi_fiberer_entity=Fiber maker
 fi_compound_machine_entity=Compound material facility
 fi_castor_entity=Nuclear waste storage
-
+fi_refinery_entity=Oil processing facility
 
 fu_boiler_entity=Thermochemical separator
 fu_burner_entity=Item/fluid handling facility
@@ -396,6 +397,10 @@ fi_modules_4_tech=Giga 248k modules
 fi_modules_5_tech=Tera 248k modules 
 fi_modules_6_tech=Peta 248k modules 
 fi_advanced_purifier_tech=Highly advanced purifaction
+fi_refinery_tech=Oil processing facility
+fi_refinery_2_tech=Sulfur based oil processing
+fi_refinery_3_tech=Carbon based oil processing
+fi_refinery_4_tech=Carbon based kerosene processing
 
 
 
@@ -569,6 +574,11 @@ limitation_message=This module can not be used here.
 [recipe-name]
 fi_decay_waste_recipe=Decay nuclear waste
 fu_burn_oxygen_recipe=Vent oxygen
+fi_refinery_basic_recipe=Highly advanced oil processing
+fi_refinery_coal_recipe=Carbon driven oil processing
+fi_refinery_sulfur_recipe=Sulfur driven oil processing
+fi_refinery_kerosene_recipe=Kerosene seperation
+fi_refinery_kerosene_coal_recipe=Carbon enriched kerosene seperation 
 
 #booktorio
 [gui]
diff --git a/prototypes/248k_fluids.lua b/prototypes/248k_fluids.lua
index bb8bcee..1a44d5b 100644
--- a/prototypes/248k_fluids.lua
+++ b/prototypes/248k_fluids.lua
@@ -160,6 +160,21 @@ data:extend({
         subgroup = 'fi_item_subgroup_f',
         order = 'a-a',
     },
+    {
+        name = 'fi_acid_gas',
+        type = 'fluid',
+        icon = sprite('fi_acid_gas.png'),
+        icon_size = 64,
+        default_temperature = 15,
+        max_temperature = 1000,
+        heat_capacity = '1kJ',
+        base_color = { r=0.9, g=0.77, b=0.6 }, 
+		flow_color = { r=0.9, g=0.77, b=0.6 }, 
+		pressure_to_speed_ratio = 0.400, 
+		flow_to_energy_ratio = 0,
+        subgroup = 'fi_item_subgroup_f',
+        order = 'a-a',
+    },
     {
         name = 'fu_lead_fluid_hot',
         type = 'fluid',
diff --git a/prototypes/248k_techs.lua b/prototypes/248k_techs.lua
index 46bd029..6bd9a57 100644
--- a/prototypes/248k_techs.lua
+++ b/prototypes/248k_techs.lua
@@ -1061,7 +1061,7 @@ data:extend({
         type = 'technology',
         icon = sprite('fi_purifier_2_tech.png'),
         icon_size = 128,
-        prerequisites = {'fi_purifier_tech', 'uranium-processing'},
+        prerequisites = {'fi_purifier_tech', 'uranium-processing', 'fi_materials_tech'},
         effects = {
             { 
                 type = 'unlock-recipe',
@@ -1374,6 +1374,7 @@ data:extend({
                 type = 'unlock-recipe',
                 recipe = 'fi_crushed_crystal_recipe',
             },
+            --[[
             { 
                 type = 'unlock-recipe',
                 recipe = 'fi_crushed_iron_recipe',
@@ -1382,14 +1383,17 @@ data:extend({
                 type = 'unlock-recipe',
                 recipe = 'fi_crushed_copper_recipe',
             },
+            ]]
             { 
                 type = 'unlock-recipe',
                 recipe = 'fi_crushed_lithium_recipe',
             },
+            --[[
             { 
                 type = 'unlock-recipe',
                 recipe = 'fi_crushed_aluminum_recipe',
             },
+            ]]
             { 
                 type = 'unlock-recipe',
                 recipe = 'fi_crushed_coal_recipe',
@@ -1398,10 +1402,12 @@ data:extend({
                 type = 'unlock-recipe',
                 recipe = 'fi_crushed_stone_recipe',
             },
+            --[[
             { 
                 type = 'unlock-recipe',
                 recipe = 'fi_crushed_uranium_recipe',
             },
+            ]]
         },
         unit = {
             count = '200',
@@ -1630,7 +1636,7 @@ data:extend({
         type = 'technology',
         icon = sprite('fi_refinery_tech.png'),
         icon_size = 128,
-        prerequisites = {'fi_stage_tech'},
+        prerequisites = {'fi_crusher_tech'},
         effects = {
             { 
                 type = 'unlock-recipe',
@@ -1638,8 +1644,16 @@ data:extend({
             },
             { 
                 type = 'unlock-recipe',
-                recipe = 'fi_refinery_blank_recipe',
-            }
+                recipe = 'fi_refinery_basic_recipe',
+            },
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_crack_sulfur_gas_recipe',
+            },
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_refinery_kerosene_recipe',
+            },
         },
         unit = {
             count = '100',
@@ -1651,6 +1665,76 @@ data:extend({
             time = 30,
         },
     },
+    {
+        name = 'fi_refinery_2_tech',
+        type = 'technology',
+        icon = sprite('fi_refinery_2_tech.png'),
+        icon_size = 128,
+        prerequisites = {'fi_refinery_tech'},
+        effects = {
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_refinery_sulfur_recipe',
+            },
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_crack_acid_gas_recipe',
+            }
+        },
+        unit = {
+            count = '300',
+            ingredients = {
+                {'chemical-science-pack',1},
+                {'automation-science-pack',1},
+                {'logistic-science-pack',1,},
+            },
+            time = 30,
+        },
+    },
+    {
+        name = 'fi_refinery_3_tech',
+        type = 'technology',
+        icon = sprite('fi_refinery_3_tech.png'),
+        icon_size = 128,
+        prerequisites = {'fi_refinery_tech'},
+        effects = {
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_refinery_coal_recipe',
+            }
+        },
+        unit = {
+            count = '300',
+            ingredients = {
+                {'chemical-science-pack',1},
+                {'automation-science-pack',1},
+                {'logistic-science-pack',1,},
+            },
+            time = 30,
+        },
+    },
+    {
+        name = 'fi_refinery_4_tech',
+        type = 'technology',
+        icon = sprite('fi_refinery_4_tech.png'),
+        icon_size = 128,
+        prerequisites = {'fi_refinery_tech'},
+        effects = {
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_refinery_kerosene_coal_recipe',
+            },
+        },
+        unit = {
+            count = '300',
+            ingredients = {
+                {'chemical-science-pack',1},
+                {'automation-science-pack',1},
+                {'logistic-science-pack',1,},
+            },
+            time = 30,
+        },
+    },
     --============================================================================================================================================================
     --fu
     {
diff --git a/prototypes/fi_recipes.lua b/prototypes/fi_recipes.lua
index 2bfdaf7..31fd071 100644
--- a/prototypes/fi_recipes.lua
+++ b/prototypes/fi_recipes.lua
@@ -181,6 +181,7 @@ data:extend({
         result_count = 4,
         energy_required = 20,
         order = 'b-b',
+        always_show_made_in = true,
     },
 
     --uran etc
@@ -1210,7 +1211,10 @@ data:extend({
         enabled = 'false',
         category = 'crafting',
         ingredients = {
-            {type="item", name="el_materials_ALK", amount=1},
+            {type="item", name="oil-refinery", amount=1},
+            {'concrete',60},
+            {'el_materials_ALK',20},
+            {'engine-unit',15},
         },
         results = {
             {type="item", name="fi_refinery_item", amount=1}
@@ -1219,17 +1223,150 @@ data:extend({
         order = 'a-b',
     },
     {
-        name = 'fi_refinery_blank_recipe',
+        name = 'fi_refinery_basic_recipe',
         type = 'recipe',
         enabled = 'false',
         category = 'fi_refining',
+        icon = sprite('icons/fi_refining_basic.png'),
+        icon_size = 64,
         ingredients = {
-            {type="fluid", name="water", amount=100},
+            {type="fluid", name="crude-oil", amount=180},
+            {type="fluid", name="steam", amount=100},
         },
         results = {
-            {type="fluid", name="steam", amount=100}
+            {type="fluid", name="petroleum-gas", amount=80},
+            {type="fluid", name="fi_acid_gas", amount=20},
+            {type="fluid", name="el_kerosene", amount=80},
+            {type="fluid", name="heavy-oil", amount=20},
         },
-        energy_required = 1,
-        order = 'a-b',
+        energy_required = 6,
+        subgroup = 'fi_item_subgroup_f',
+        order = 'a-a',
+        always_show_made_in = true,
+    },
+    {
+        name = 'fi_refinery_coal_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'fi_refining',
+        icon = sprite('icons/fi_refining_coal.png'),
+        icon_size = 64,
+        ingredients = {
+            {type="fluid", name="crude-oil", amount=180},
+            {type="fluid", name="steam", amount=100},
+            {type="item", name="fi_crushed_coal_item", amount=10},
+        },
+        results = {
+            {type="fluid", name="petroleum-gas", amount=60},
+            {type="fluid", name="fi_acid_gas", amount=30},
+            {type="fluid", name="el_kerosene", amount=65},
+            {type="fluid", name="heavy-oil", amount=75},
+        },
+        energy_required = 6,
+        subgroup = 'fi_item_subgroup_f',
+        order = 'a-a',
+        always_show_made_in = true,
+    },
+    {
+        name = 'fi_refinery_sulfur_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'fi_refining',
+        icon = sprite('icons/fi_refining_sulfur.png'),
+        icon_size = 64,
+        ingredients = {
+            {type="fluid", name="crude-oil", amount=180},
+            {type="fluid", name="steam", amount=100},
+            {type="item", name="sulfur", amount=3},
+        },
+        results = {
+            {type="fluid", name="petroleum-gas", amount=80},
+            {type="fluid", name="fi_acid_gas", amount=50},
+            {type="fluid", name="el_kerosene", amount=80},
+            {type="fluid", name="heavy-oil", amount=20},
+        },
+        energy_required = 6,
+        subgroup = 'fi_item_subgroup_f',
+        order = 'a-a',
+        always_show_made_in = true,
+    },
+    {
+        name = 'fi_crack_sulfur_gas_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'chemistry',
+        main_product = 'sulfur',
+        ingredients = {
+            {type="fluid", name="fi_acid_gas", amount=10},
+            {type="fluid", name="steam", amount=20},
+        },
+        results = {
+            {type="fluid", name="water", amount=15},
+            {type="item", name="sulfur", amount=1},
+        },
+        energy_required = 0.5,
+        subgroup = 'fi_item_subgroup_f',
+        order = 'a-a',
+        always_show_made_in = true,
+    },
+    {
+        name = 'fi_crack_acid_gas_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'chemistry',
+        main_product = 'el_acidic_water',
+        ingredients = {
+            {type="fluid", name="fi_acid_gas", amount=20},
+            {type="fluid", name="steam", amount=20},
+        },
+        results = {
+            {type="fluid", name="el_acidic_water", amount=20},
+            {type="fluid", name="sulfuric-acid", amount=5},
+        },
+        energy_required = 0.5,
+        subgroup = 'fi_item_subgroup_f',
+        order = 'a-a',
+        always_show_made_in = true,
+    },
+    {
+        name = 'fi_refinery_kerosene_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'fi_refining',
+        icon = sprite('icons/fi_cracking_kerosene.png'),
+        icon_size = 64,
+        ingredients = {
+            {type="fluid", name="el_kerosene", amount=200},
+        },
+        results = {
+            {type="fluid", name="el_acidic_water", amount=80},
+            {type="fluid", name="fi_acid_gas", amount=40},
+            {type="fluid", name="el_desulfurized_kerosene", amount=80},
+        },
+        energy_required = 6,
+        subgroup = 'fi_item_subgroup_f',
+        order = 'a-a',
+        always_show_made_in = true,
+    },
+    {
+        name = 'fi_refinery_kerosene_coal_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'fi_refining',
+        icon = sprite('icons/fi_cracking_kerosene_coal.png'),
+        icon_size = 64,
+        ingredients = {
+            {type="fluid", name="el_kerosene", amount=200},
+            {type="item", name="fi_crushed_coal_item", amount=10},
+        },
+        results = {
+            {type="fluid", name="el_acidic_water", amount=90},
+            {type="fluid", name="fi_acid_gas", amount=60},
+            {type="fluid", name="heavy-oil", amount=80},
+        },
+        energy_required = 6,
+        subgroup = 'fi_item_subgroup_f',
+        order = 'a-a',
+        always_show_made_in = true,
     },
 })
\ No newline at end of file
diff --git a/ressources/fluids/fi_acid_gas.png b/ressources/fluids/fi_acid_gas.png
new file mode 100644
index 0000000..a2cf614
Binary files /dev/null and b/ressources/fluids/fi_acid_gas.png differ
diff --git a/ressources/icons/fi_cracking_kerosene.png b/ressources/icons/fi_cracking_kerosene.png
new file mode 100644
index 0000000..0c15c5c
Binary files /dev/null and b/ressources/icons/fi_cracking_kerosene.png differ
diff --git a/ressources/icons/fi_cracking_kerosene_coal.png b/ressources/icons/fi_cracking_kerosene_coal.png
new file mode 100644
index 0000000..07ca106
Binary files /dev/null and b/ressources/icons/fi_cracking_kerosene_coal.png differ
diff --git a/ressources/icons/fi_refining_basic.png b/ressources/icons/fi_refining_basic.png
new file mode 100644
index 0000000..32edbc2
Binary files /dev/null and b/ressources/icons/fi_refining_basic.png differ
diff --git a/ressources/icons/fi_refining_coal.png b/ressources/icons/fi_refining_coal.png
new file mode 100644
index 0000000..9e2c7ad
Binary files /dev/null and b/ressources/icons/fi_refining_coal.png differ
diff --git a/ressources/icons/fi_refining_sulfur.png b/ressources/icons/fi_refining_sulfur.png
new file mode 100644
index 0000000..3ac52dc
Binary files /dev/null and b/ressources/icons/fi_refining_sulfur.png differ
diff --git a/ressources/techs/fi_refinery_2_tech.png b/ressources/techs/fi_refinery_2_tech.png
new file mode 100644
index 0000000..f5c3cca
Binary files /dev/null and b/ressources/techs/fi_refinery_2_tech.png differ
diff --git a/ressources/techs/fi_refinery_3_tech.png b/ressources/techs/fi_refinery_3_tech.png
new file mode 100644
index 0000000..f75e74d
Binary files /dev/null and b/ressources/techs/fi_refinery_3_tech.png differ
diff --git a/ressources/techs/fi_refinery_4_tech.png b/ressources/techs/fi_refinery_4_tech.png
new file mode 100644
index 0000000..2668af9
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